LT8610AX

LTC2879X AD | Alldatasheet

Document overview

• Manufacturer or author: Analog Devices, Inc.
• PDF pages: 18

Technical content

Rev 0For more information www.analog.comDocument Feedback TYPICAL APPLICATION FEATURES DESCRIPTION ±60V Fault Tolerant RS485/RS422 Transceiver with Operation to 175°C The LT C®2879X is a rugged R S485/RS422 transceiver designed to operate over a wide temperature range of –55°C to 175°C . Special processing steps are used to prevent intermetallic growth that can cause metal voids on standard parts operating at high temperatures. Low- drift, low-leakage circuitry and lack of a thermal shutdown circuit allow the LTC2879X to meet critical specifications, tested 100% at 175°C. The LTC2879X also meets the specifications for PROFIBUS-DP (IEC 61158-2) supporting all data rates from 9.6kbps to 12Mbps. The LTC2879X is exceptionally robust, tolerating ± 60V faults on the bus pins and protected to ±52kV ESD. These devices are suitable for harsh environments or where 24V power might be inadvertently connected. Extended ±25V input common mode operating range and full failsafe operation improve data communication reliability in noisy systems. The LTC2879X meets RS485, RS422, and PROFIBUS-DP specifications with a supply voltage of 4.5V to 5.5V with full RS485/RS422 compatibility down to 3V.

APPLICATIONS

n Guaranteed Operation from –55°C to 175°C n Fully Tested at 175°C n Protected from Overvoltage Line Faults to ±60V n ±52kV ESD Interface Pins, ±15kV All Other Pins n Level 4 IEC61000-4-4 Electrical Fast T ransient n ±25V Working Common Mode Range n 20Mbps Maximum Baud Rate n Operates with VCC from 3V to 5.5V n PROFIBUS IEC 61158-2 Compliant (VCC ≥ 4.5V) n Fully Balanced Differential Receiver Thresholds with 240mV Hysteresis for Superior Noise Tolerance and Low Duty Cycle Distortion n Receiver Failsafe for Open, Shorted and Terminated Conditions n Available in a Tiny 3mm × 3mm MSOP Package n Oil and Gas Exploration n High Temperature Industrial Control n PROFIBUS-DP n Military Systems n Harsh Environments All registered trademarks and trademarks are the property of their respective owners. VCC GND DI RE RO DE B A 0.1µF L TC2879X SENSOR 120/uni03A9 3V TO 5.5V RS485 CABLE ZO = 120Ω µC 120/uni03A9 2879X TA01a 175°C, 20Mbps, VCC = 5V 50ns/DIV DI 5V/DIV A AND B 2V/DIV RO 5V/DIV A–B 2V/DIV 2879X TA01b RL = 54/uni03A9 CL = 100pF (FIGURE 5)

Rev 0For more information www.analog.com ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Δ|VOD(485)|, Δ|VOD(422)| RS485, RS422 Change in Magnitude of Driver Differential Output Voltage RL = 27Ω (RS485) or RL = 50Ω (RS422) (Figure 1) l 0.2 V VOC(485), VOC(422) RS485, RS422 Driver Common-Mode Output Voltage R L = 27Ω (RS485) or RL = 50Ω (RS422) (Figure 1) l 3 V Δ|VOC(485)|, Δ|VOC(422)| RS485, RS422 Change in Magnitude of Driver Common-Mode Output Voltage R L = 27Ω (RS485) or RL = 50Ω (RS422) (Figure 1) l 0.2 V VOD(PP) Differential Bus Output Voltage (B´–A´) with PROFIBUS Load PROFIBUS LOAD (Figure 2) R CABLE = 0Ω, VCC = 4.5V to 5.5V RCABLE = 5.5Ω, VCC = 4.5V to 5.5V RCABLE = 11Ω, VCC = 4.75V to 5.5V l l l V P-P(DIFF) VP-P(DIFF) VP-P(DIFF) VBPP-APP Single-Ended Bus Output Amplitude Difference (B´PP – A´PP) All of the Conditions Above l 0.5 V VBPP+APP Single-Ended Bus Output Amplitude Sum |B´ PP + A´PP| All of the Conditions Above l 4 V Differential Capacitance (A to B) (Note 3) Powered, V CC = 5V Unpowered, VCC = 0V pF pF IOSD Maximum Driver Short-Circuit Current –60V ≤ (A or B) ≤ 60V (Figure 3) l ±150 ±250 mA Receiver IIN Input Current (A, B) VCC = 0V or 5V, VBUS = 12V (Figure 4) VCC = 0V or 5V, VBUS = –7V (Figure 4) l l –194 333 µA µA RIN Input Resistance VBUS = –25V or 25V (Figure 4) l 36 112 135 kΩ VCM Common Mode Input Voltage (A+B)/2 for Data Reception l ±25 V VTS+ Differential Input Signal Threshold Voltage (A–B) Rising –25V ≤ VCM ≤ 25V, Edge Rates > 100mV/µs (Note 4) (Figure 12) l 40 120 200 mV VTS– Differential Input Signal Threshold Voltage (A–B) Falling –25V ≤ VCM ≤ 25V, Edge Rates > 100mV/µs (Note 4) (Figure 12) l –40 – 120 –200 mV ΔVTS Differential Input Signal Hysteresis Edge Rates > 100mV/µs (Note 4) (Figure 12) 240 mV VTFS+ Differential Input Failsafe Threshold Voltage (A–B) Rising –25V ≤ VCM ≤ 25V, DC Bus Voltages (Figure 12) l –10 –75 –200 mV VTFS– Differential Input Failsafe Threshold Voltage (A–B) Falling –25V ≤ VCM ≤ 25V, DC Bus Voltages (Figure 12) l –40 –120 –200 mV ΔVTFS Differential Input Failsafe Hysteresis DC Bus Voltages (Figure 12) 45 mV VOH Receiver Output High Voltage VCC ≥ 3.0V, I(RO) = –3mA l VCC – 0.4V V VOL Receiver Output Low Voltage VCC ≥ 3.0V, I(RO) = 3mA l 0.4 V Receiver Three-State (High Impedance) Output Current on RO RE = High, RO = 0V l –20 –40 µA Receiver Three-State (High Impedance) Output Current on RO RE = High, RO = V CC l 0 5 µA Receiver Short-Circuit Current RE = Low, RO = 0V or VCC l ±12 ±20 mA Logic Low Level Input Voltage (DE, DI, RE) 3.0 ≤ V CC ≤ 5.5V l 0.25 • VCC V High Level Input Voltage (DE, DI, RE) 3.0 ≤ V CC ≤ 5.5V l 0.75 • VCC V Logic Input Current Low (DE) DE = 0V l 0 –5 µA Logic Input Current Low (DI, RE) DI or RE = 0V l –3 –10 –20 µA Logic Input Current High (DE) DE = V CC l 3 10 20 µA Logic Input Current High (DI, RE) (DI, RE) = V CC l 0 5 µA

Rev 0 For more information www.analog.com ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS fMAX Maximum Data Rate (Note 3) l 20 Mbps Driver tPLHD, tPHLD Driver Input to Output VCC = 3.3V or 5V (Figure 5) l 13 50 ns ΔtPD Driver Input to Output Difference |tPLHD – tPHLD| (Figure 5) l 2 9 ns tSKEWD Driver Output A to Output B (Figure 5) l ±9 ns tRD, tFD Driver Rise or Fall Time VCC = 3.3V or 5V (Figure 5) l 4 16 ns tZLD, tZHD, tLZD, tHZD Driver Enable or Disable Time RE = 0V (Figure 6) l 180 ns tZHSD, tZLSD Driver Enable from Shutdown RE = High (Figure 6) l 15 µs tSHDND Time to Shutdown with DE RE = High (Figure 6) l 180 ns Receiver tPLHR, tPHLR Receiver Input to Output VCM = 2.25V, (A–B) = ±1.5V, tR and tF < 4ns, VCC = 3.3V or 5V (Figure 7) l 50 75 ns ΔtPR Receiver Input to Output Difference |tPLHR – tPHLR| (Figure 7) l 2 14 ns tZLR, tZHR, tLZR, tHZR Receiver Enable/Disable Time DE = High (Figure 8) l 40 ns tZHSR, tZLSR Receiver Enable from Shutdown DE = 0V, (Figure 9) l 9 µs tSHDNR Time to Shutdown with RE DE = 0V, (Figure 9) l 40 ns SWITCHING CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 5V unless otherwise noted. Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise specified. Note 3: Not tested in production. Note 4: The dependency on edge rate is tested indirectly. Note 5: The LTC2879X is guaranteed over the full –55°C to 175°C operating temperature range. High junction temperatures degrade operating lifetimes. Operating lifetime is derated at junction temperatures greater than 125°C. The LTC2879X has no thermal shutdown. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS ESD (Note 3) ESD Protection Level of Interface Pins (A, B) Human Body Model to GND or VCC Powered or Unpowered 26 kV Human Body Model to GND, Unpowered ±52 kV ESD Protection Level of All Other Pins (DE, DI, RE, V CC) Human Body Model ±15 kV

Rev 0For more information www.analog.com TYPICAL PERFORMANCE CHARACTERISTICS Driver Differential Output Voltage vs Supply Voltage Driver Differential Output Voltage vs Temperature Driver Output Low/High Voltage vs Output Current Driver Output Short-Circuit Current vs Voltage Driver and Receiver Propagation Delay vs V CC VCC Supply Current vs Voltage for Various Modes, No Load VCC Supply Current vs Temperature for Various Modes, No Load VCC Supply Current vs Data Rate TA = 25°C. VCC = 5V, unless otherwise noted. (Note 2) I CCDR I CCD I CCR I CCS (nA) 3.5 4.5 5.5 500 550 600 650 700 750 V CC SUPPL Y CURRENT (µA) I CCS (nA) 2879X G01 VCC (V) I CCDR I CCD I CCR I CCS (nA) TEMPERATURE (°C) –60 –30 120 150 180 500 550 600 650 700 750 800 0.1 100 10k 100k I CCDR , I CCD , I CCR (µA) I CCS (nA) 2879X G02 RS485 54Ω/100pF LOAD (FIG. 5) V CC = 5V PROFI 100m CABLE W/TERM (FIG.1) VCC = 5V RS485 54Ω/100pF LOAD (FIG. 5) V CC = 3.3V NO LOAD, VCC = 5V NO LOAD, VCC = 3.3V DATA RATE (Mbps) V CC SUPPL Y CURRENT (mA) 2879X G03 V CC (V) 3.5 4.5 5.5 V OD (V) 2879X G04 VOD(PP) PROFIBUS LOADS (FIG.1) VOD(422) (FIG.2, RL = 50/uni03A9) VOD(485) (FIG.2, RL = 27/uni03A9) V OD(PP) PROFI LOAD (Fig. 2), V CC = 5V V OD(422) (Fig. 1, R L = 50Ω), V CC = 5V V OD(485) (Fig. 1, R L = 27Ω), V CC = 5V V OD(422) (Fig. 1, R L = 50Ω), V CC = 3.3V V OD(485) (Fig. 1, R L = 27Ω), V CC = 3.3V TEMPERATURE (°C) –60 –30 120 150 180 V OD (V) 2879X G05 V OH CC = 5.0V) V OH CC = 3.3V) V OL CC = 5.0V) V OL CC = 3.3V) OUTPUT CURRENT (mA) DRIVER OUTPUT VOL TAGE (V) 2879X G06 OUTPUT LOW OUTPUT HIGH OUTPUT VOL TAGE (V) –60 –40 –20 –160 –120 –80 –40 120 160 OUTPUT CURRENT (mA) 2879X G07 DRIVER RECEIVER 3.5 4.5 5.5 PROPAGATION DELAY (ns) 2879X G08 VCC (V)

Rev 0 For more information www.analog.com TYPICAL PERFORMANCE CHARACTERISTICS Receiver Propagation Delay vs Temperature Receiver Propagation Delay Difference vs Temperature Receiver Output Voltage vs Output Current (Source and Sink) Receiver Output Voltage vs V CC Voltage Driver Output Skew vs Temperature Driver Output Propagation Delay Difference vs Temperature T A = 25°C. VCC = 5V, unless otherwise noted. (Note 2) V CC = 3.3V V CC = 5V TEMPERATURE (°C) –60 –30 120 150 180 tSKEWD (ns) 2879X G10 V CC = 3.3V V CC = 5V TEMPERATURE (°C) –60 –30 120 150 180 ∆t PD (ns) 2879X G11 V CC = 3.3V V CC = 5V TEMPERATURE (°C) –60 –30 120 150 180 PROPAGATION DELAY (ns) 2879X G12 V CC = 3.3V V CC = 5V TEMPERATURE (°C) –60 –30 120 150 180 2879X G13 ∆t PR (ns) OUTPUT CURRENT (ABSOLUTE VALUE, mA) RECEIVER OUTPUT VOLTAGE (V) 2 4 6 2879X G14 VCC = 5.5V (RO HIGH, SOURCING) VCC = 3V (RO HIGH, SOURCING) VCC = 3V TO 5.5V (OUTPUT LOW SINKING) V CC (V) 3.5 4.5 5.5 100 150 200 V OL OR V OH (mV) 2879X G15 VOL FOR I(RO) = –2mA VCC–VOH FOR I(RO) = –2mA VOL FOR I(RO) = +3mA VCC–VOH FOR I(RO) = +3mA Driver Propagation Delay vs Temperature V CC = 3.3V V CC = 5V TEMPERATURE (°C) –60 –30 120 150 180 PROPAGATION DELAY (ns) 2879X G9

Rev 0For more information www.analog.com TYPICAL PERFORMANCE CHARACTERISTICS 175°C, 12Mbps, VCC = 3.3V PROFIBUS Operation at 12Mbps VCC = 5V 175°C, 20Mbps, VCC = 3.3V 50°C, 20Mbps, VCC = 3.3V Eye Diagram of 12Mbps PRBS Signal at Both Ends of 100m PROFIBUS Cable 175°C, 12Mbps, V CC = 5V TA = 25°C. VCC = 5V, unless otherwise noted. (Note 2) 50ns/DIV DI 5V/DIV RO 5V/DIV A–B 1V/DIV 2879X G16 RL = 54/uni03A9 CL = 100pF (FIGURE 5) A AND B 1V/DIV 50ns/DIV DI 5V/DIV B 1V/DIV A 1V/DIV 2879X G20 DOUBLE PROFIBUS TERMINATION RCABLE = 0/uni03A9 (FIGURE 1) 50ns/DIV DI 5V/DIV A AND B 1V/DIV RO 5V/DIV A–B 1V/DIV 2879X G18 RL = 54/uni03A9 CL = 100pF (FIGURE 5) 50ns/DIV DI 5V/DIV A AND B 2V/DIV RO 5V/DIV A–B 2V/DIV 2879X G17 RL = 54/uni03A9 CL = 100pF (FIGURE 5) 20ns/DIV A–B 2V/DIV A–B 2V/DIV 2879X G21 NEAR END FAR END 50ns/DIV DI 5V/DIV A AND B 1V/DIV RO 5V/DIV A–B 1V/DIV 2879X G19 RL = 54/uni03A9 CL = 100pF (FIGURE 5)

Rev 0 For more information www.analog.com PIN FUNCTIONS RO (Pin 1): Receiver Output. If the receiver is enabled (RE low) and A– B > 200mV, then RO will be high. If A–B < –200mV, then RO will be low. If the receiver inputs are open, shorted, or terminated without being driven for more than about 1.5µs, RO will be high. Integrated 250k pull-up resistor to supply. RE (Pin 2): Receiver Enable. A low input enables the receiver . A high input forces the receiver output into a high impedance state. If RE is high with DE low, the device enters a low power shutdown state. Integrated 500k pull- up resistor to supply. DE (Pin 3): Driver Enable. A high input on DE enables the driver . A low input forces the driver outputs into a high impedance state. If DE is low with RE high, the device enters a low power shutdown state. Integrated 500k pull- down resistor to ground. DI (Pin 4): Driver Input. If the driver outputs are enabled (DE high), then a low on DI drives a negative differential voltage between A and B. A high on DI, with the driver out- puts enabled, drives a positive differential voltage between A and B. Integrated 500k pull-up resistor to supply. GND (Pin 5, 9): Ground A (Pin 6): Non-Inverting Receiver Input and Non-Inverting Driver Output. For use in a PROFIBUS network, connect this to the B wire (red, positive). B (Pin 7): Inverting Receiver Input and Inverting Driver Output. For use in a PROFIBUS network, connect this to the A wire (green, negative). V CC (Pin 8): Power Supply. 3.0V ≤ V CC ≤ 5.5V. Bypass with a 0.1µF ceramic capacitor to GND. Exposed Pad (Pin 9): Must be connected to GND. BLOCK DIAGRAM L TC2879X DI VCC VCC GND RE RO DE 3V TO 5.5V VCC VCC MODE CONTROL DRIVER RECEIVER B A 2879X BD

Rev 0 For more information www.analog.com Note: Specifications in this section represent typical values unless otherwise noted. RS485/RS422 FOR HIGH TEMPERATURE RS485/RS422 offers high speed differential signaling for robust communication between multiple devices over long distances in noisy environments. The LTC2879X was designed to operate in temperatures from –55°C to 175°C, making it suitable for use in harsh environments such as down-hole drilling and high tem - perature industrial applications. The LT C2879X is manufactured using special processing steps to prevent intermetallic growth that can cause metal voids on standard parts operating at high temperatures. Low-drift, low-leakage circuitry and lack of a thermal shutdown circuit allow the LTC2879X to meet critical specifications, tested 100% at 175°C. High Temperature Operating Life (HTOL), per JEDEC JESD22, is used in the LTC2879X qualification to ensure reliable high temperature performance. HTOL units passed 3000 hours operating at 175°C, with no fails. DRIVER The driver is enabled when the LTC2879X is powered up and DE is high. The polarity of A–B follows that of DI. That is, when DI is high, A drives to a voltage that is greater than B. If DI is low, B is higher than A. When the driver is disabled with DE low, both outputs are high impedance and the overall pin resistance is dominated by the receiver inputs sharing pins A and B. Driver Overvoltage and Overcurrent Protection The LTC2879X driver outputs A and B are protected from short circuits to any voltage within the absolute maximum range of –60V to +60V, with a maximum differential volt- age of –120V to +120V. The maximum short-circuit cur- rent to any voltage within this range is ±250mA. The driver includes a progressive foldback current limiting circuit APPLICATIONS INFORMATION that continuously reduces the driver current limit with increasing output short circuit voltage to better manage power dissipation and heating effects (see plot in Typical Performance Characteristics section). RECEIVER The receiver provides full RS485/RS422 and PROFIBUS compatibility. When enabled, the state of RO reflects the polarity of (A–B). When the receiver is disabled, the out- put is high impedance and RO weakly pulled high to VCC through an internal 250k pull-up resistor . High Receiver Input Resistance Permits 96 Nodes The RS485 and PROFIBUS specifications allows for up to 32 devices, each contributing one unit load, to be con- nected together in one network. The A/B input current of the LTC2879X is guaranteed to be 3× lower than the standard, over the entire temperature range, permitting a total of 96 LTC2879X devices in a contiguous network. ±25V Extended Common Mode Range The LTC2879X receiver features an extended operating common mode range of –25V to +25V. The wide com - mon mode increases the reliability of operation in environ- ments with high common mode voltages created by elec- trical noise or local ground potential differences due to ground loops. This extended common mode range allows the LTC2879X to transmit and receive under conditions that would cause data errors or possible device damage in competing products. Balanced Signal Threshold The LTC2879X differential threshold is 120mV for rising input signals and –120mV for falling signals. This consti- tutes 240mV of hysteresis, which offers a high rejection to signal noise that can otherwise falsely trip the receiver . Since these thresholds are centered around zero volts (i.e. “balanced”), the duty cycle is preserved for small amplitude signals with slewed edges—typical of what is observed at the end of a long cable. Figure 10 illustrates this point.

reaches a voltage sufficient to reliably operate the chip. to reflect the state of the differential voltage across A–B. pulled low through the 125k receiver input resistors. nected onto a live network without disturbing the lines. may encounter voltages much greater than this. Figure 13. Internal Circuit Structure at A/B Pins that Tolerates Large Positive and Negative Voltages

to thrive in these adverse conditions. protected to ±15kV ESD (HBM) for all-around robustness. Figure 14. This Single Exposure Image Captures the Striking Robustness of an Unprotected LTC2879X Hit

Rev 0 For more information www.analog.com APPLICATIONS INFORMATION Figure 14 shows an unprotected LTC2879X struck repeat- edly with 26kV from an ESD gun using air discharge to illustrate the strike energy. The device continues to func- tion normally after the strikes, without damage or cycling the power. EFT Electrical fast transients can result from arcing contacts in switches and relays, common when switching induc - tive loads. The IEC standard for EFT is IEC61000-4-4 and specifies a repetitive burst pattern lasting 60 seconds. The LTC2879X is robust to EFT events and passes the highest level recognized in the IEC standard: level 4, ±2kV on the A and B pins, without any external protection. PROFIBUS APPLICATIONS The LTC2879X meets the requirements for PROFIBUS appli- cations for all data rates up to 12Mbps over the full tem- perature range. Unlike some RS485 transceivers that claim PROFIBUS compliance but test only to RS485 standards, the LTC2879X is tested to the specifications for PROFIBUS-DP masters and PROFIBUS-DP slaves, fully compatible with IEC 61158-2, Type 3: medium attachment unit: asynchronous transmission, wire medium. These tests are performed using specific PROFIBUS loads to ensure compliance. When using the LT C2879X in PROFIBUS applications, beware that the naming convention for PROFIBUS wires is opposite to convention commonly used for RS485. In standard installations, connect the LTC2879X A pin to the B wire (red) and the LTC2879X B pin to the A wire (green). For more information on PROFIBUS applications, refer to the LTC2876/LTC2877 data sheet. 3.3V OPERATION The LTC2879X can be used with a supply voltage as low as 3.0V in RS485 installations. Reducing the supply volt- age reduces the driver output signal swing below what is specified in the RS485 standard but still produces signals much larger than the 200mV minimum signal swing required at the receiver input. A plot in the Typical Performance Characteristics section shows the driver output signal for 3.3V and 5V supply voltages. 3.3V-powered LTC2879X devices can be mixed with other RS485 transceivers running from 5V on the same network. There is no concern for the higher voltage of a 5V node overdriving the 3.3V node due to the overvoltage-tolerant design of the LTC2879X, as illustrated in Figure 13. One advantage to using a lower supply voltage is reduced VCC current draw. VCC supply currents are roughly propor- tional to the applied supply voltage when the LTC2879X is driving loads. The Typical Performance Characteristics section shows the typical power supply currents versus transmission rates for 3.3V and 5V supplies. PROFIBUS installations that use the LTC2879X with sup- ply voltages less than 4.5V, may fall out of compliance to the PROFIBUS specification. HIGH SPEED CONSIDERA TIONS A ground plane layout with a 0.1µF bypass capacitor placed less than 7mm away from V CC is recommended. The PC board traces connected to signal A and B should be symmetrical and as short as possible to maintain good differential signal integrity. To minimize capacitive effects, the differential signals should be separated by more than the width of a trace and should not be routed on top of each other if they are on different signal planes. Care should be taken to route the outputs away from the sensitive inputs to reduce feedback effects that might cause noise, jitter , and even oscillations. For example, DI and RO should not be routed next to each other or next to A and B. Logic inputs have a typical hysteresis of about 150mV to provide noise immunity. Fast edges on the outputs can cause glitches in the ground and power supplies which are exacerbated by capacitive loading. If a logic input is held near its threshold (typically V CC/2), a noise glitch from a driver transition may exceed the hysteresis levels on the logic and data input pins, causing an unintended state change. This can be avoided by maintaining normal logic levels on the pins and by slewing inputs faster than 1V/µs. Good supply decoupling and proper driver termi- nation also reduces glitches caused by driver transitions.

Rev 0For more information www.analog.com Information furnished by Analog Devices is believed to be accurate and reliable. However , no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. PACKAGE DESCRIPTION Please refer to http://www.linear .com/product/LTC2879X#packaging for the most recent package drawings. 8-Lead Plastic MSOP , Exposed Die Pad (Reference L TC DWG # 05-08-1662 Rev K) MSOP (MS8E) 0213 REV K 0.53 ±0.152 (.021 ±.006) SEATING PLANE NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 6. EXPOSED PAD DIMENSION DOES INCLUDE MOLD FLASH. MOLD FLASH ON E-PAD SHALL NOT EXCEED 0.254mm (.010") PER SIDE. 0.18 (.007) 0.254 (.010) 1.10 (.043) MAX 0.22 – 0.38 (.009 – .015) TYP 0.86 (.034) REF 0.65 (.0256) BSC 0° – 6° TYP DETAIL “A” DETAIL “A” GAUGE PLANE 1 2 3 4 4.90 ±0.152 (.193 ±.006) BOTTOM VIEW OF EXPOSED PAD OPTION 7 6 5 3.00 ±0.102 (.118 ±.004) (NOTE 3) 3.00 ±0.102 (.118 ±.004) (NOTE 4) 0.52 (.0205) REF 1.68 (.066) 1.88 (.074) 5.10 (.201) MIN 3.20 – 3.45 (.126 – .136) 1.68 ±0.102 (.066 ±.004) 1.88 ±0.102 (.035 ±.005) RECOMMENDED SOLDER PAD LAYOUT 0.65 (.0256) BSC 0.42 ±0.038 (.0165 ±.0015) TYP 0.1016 ±0.0508 (.004 ±.002) DETAIL “B” DETAIL “B” CORNER TAIL IS PART OF THE LEADFRAME FEATURE. FOR REFERENCE ONL Y NO MEASUREMENT PURPOSE

0.05 REF

0.29 REF 8-Lead Plastic MSOP, Exposed Die Pad (Reference LTC DWG # 05-08-1662 Rev K)

Rev 0 For more information www.analog.com  ANALOG DEVICES, INC. 2018 D16896-0-5/18(0) www.analog.com RELATED PARTS TYPICAL APPLICATION PART NUMBER DESCRIPTION COMMENTS LT8610AX 175°C, 42V, 3.5A Synchronous Step-Down Regulator VIN: 3.7V to 42V, 16-Lead MSOP Package LT1007X 200°C Low Noise Op Amp Low Noise, High Speed Precision Operational Amplifier , 8-Lead TO-5 Metal Can Package LTC1871X 175°C Wide Input Range Current Mode Boost, Flyback and SEPIC Controller No Sense Resistor Required, 2.5V to 26V Wide Input Voltage Range LT6203X 175°C Dual Ultralow Noise, Low Power Op Amp 100MHz, Rail-to-Rail Input and Output LT1210X 175°C, 1.0A, 35MHz Current Feedback Amplifier 900V/µs Slew Rate, High Input Impedance, Low Power Shutdown Mode LT580X/LT581X/ LT582X 200°C Voltage Reference Ultralow Drift, Curvature Corrected Reference, 3-Lead TO-52 Metal Can Package LTC2876/LTC2877 ±60V Rugged PROFIBUS RS485 T ransceivers ±60V Tolerant, ±52kV ESD, 20Mbps L TC2879X L TC2879X TE = 5V TE = 5V 2879X TA02 L TC2859L TC2859 Multi-Node Network and End Termination Using the LTC2879X and LTC2859