ZXCT1107_1107 | DigiCamel IC Datasheet

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ZXCT1107_1107 DIODES | Alldatasheet

Document overview

Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
PDF pages: 16

Technical content

Features

Wide supply and common-mode voltage range: 2.5V to 36V
SOT23 packages o 3-pin ZXCT1107/09 o 5-pin ZXCT1110
Low quiescent current (3µA).
Extended industrial temperature range -40 to 125°C
AEC-Q100 Grade1 Automotive qualified variants

Applications

Automotive current measurement
Industrial applications current measurement
Battery management
Over current monitor
Power Management Pin Assignments ZXCT1107 Top View OUT 1 2 S- 3 S+ OUT 1 2 S- 3 S+ ZXCT1109 Top View OUT 1 2 S+ 3 S- OUT 1 2 S+ 3 S- ZXCT1110 Top View GND 2 5 S- 4 S+ NC 1 OUT 3 GND 2 5 S- 4 S+ NC 1 OUT 3 Typical Application Circuit

LOW POWER HIGH-SIDE CURRENT MONITORS ZXCT1107/1109/1110 Document number: DS35033 Rev. 3 - 2 2 of 16 www.diodes.com JULY 2011 © Diodes Incorporated A Product Line of Diodes Incorporated NEW PRODUCT Pin Descriptions OUT 1 1 1 1 3 Output pin. Current output. S+ 3 2 4 This is the positive input of the current monitor and has a wide common-mode input range. This also acts as the analog supply and provides power to internal circuitry. The current through this pin varies with differential sense voltage. S- 2 3 5 This is the negative input of the current monitor and has a wide common-mode input range. GND - - 2 Ground pin and substrate connection. NC - - 1 No connection Notes. 1. For the ZXCT1107 and ZXCT1109 pin 1 (OUT) acts as both the output pin and substrate connection. This means that for the ZXCT1107 and ZXCT1109 the minimum rail voltage that can be used is 2.5V + V OUT (see applications section for more details). Absolute Maximum Ratings Description Rating Unit Voltage on S- and S+ relative to OUT (ZXCT1107/9) -0.3 to 40 V Voltage on S- and S+ relative to GND (ZXCT1110) -0.3 to 40 V Voltage on OUT to GND (ZXCT1110) -0.3 to VS+ V Differential Sense Voltage, VSENSE 2,3 -0.3 to 0.8 V Current into S+ and S-3 ±8.5 mA Storage Temperature -55 to 150 °C Maximum Junction Temperature 150 °C Package Power Dissipation (TA = 25°C) SOT23 SOT25 300 (De-rate to Zero at 150°C) 300 (De-rate to Zero at 150°C) mW ESD Ratings Human Body Model 1000 V Machine Model 150 V Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for extended periods, may reduce device reliability. Notes: 2. V SENSE = VS+ - VS- 3. The differential input voltage limit, V S+ - VS-, may be exceeded provided that the input current limit into S+ or S- is not exceeded.

LOW POWER HIGH-SIDE CURRENT MONITORS ZXCT1107/1109/1110 Document number: DS35033 Rev. 3 - 2 3 of 16 www.diodes.com JULY 2011 © Diodes Incorporated A Product Line of Diodes Incorporated NEW PRODUCT Recommended Operating Conditions Symbol Parameter Min Max Unit VS+ Common-mode input range4: ZXCT1110 2.5 36 V ZXCT1107/9 VOUT(MAX) + 2.5 36 VSENSE Differential Sense Input voltage range (V S+-VS-) 0 0.5 V VOUT Output voltage range (0 ≤ VSENSE ≤ 100mV) ZXCT1110 0 VS- - 1 V ZXCT1107/9 0 VS+ - 2.5 TA Ambient temperature range -40 125 °C Notes. 4. For the ZXCT1107 and ZXCT1109 pin 1 (OUT) acts as both the output pin and substrate connection. This means that for the ZXCT1107 and ZXCT1109 the minimum rail voltage that can be used is 2.5V + V OUT (see applications section for more details). Electrical Characteristics (TA = 25°C, VS+ = 20V, VSENSE 5 = 100mV, RGAIN = 0 unless otherwise stated) ZXCT1107, ZXCT1109 Symbol Parameter Conditions TA Min Typ Max Units IS- S- input current VSENSE 5 = 0V 25°C 19 100 nA -40°C 16 125°C 35 IOUT Output current6 VSENSE 5 = 0mV 25°C 1 3 10 µA -40°C 2.2 125°C 5.5 VSENSE 5 = 10mV 25°C 37 45 54 -40°C 42 125°C 49 VSENSE 5 = 30mV 25°C 115 124 134 -40°C 119 125°C 129 VSENSE 5 = 100mV 25°C 394 408 422 -40°C 396 125°C 420 VSENSE 5 = 200mV 25°C 787 810 832 -40°C 785 125°C 832 VSENSE 5 = 500mV 25°C 1.965 2.015 2.064 mA -40°C 1.965 125°C 2.065 IOUT -TC Output current temperature coefficient full range 370 ppm/ºC CMSR Common-Mode Sense rejection VS+ = 2.5V to 36V 25°C 0.1 0.4 µA/V -40°C 0.13 125°C 0.05 BW -3dB Small Signal Bandwidth VSENSE (AC) = 10mVPP RGAIN = 2.5kΩ 25°C 0.65 MHz

LOW POWER HIGH-SIDE CURRENT MONITORS ZXCT1107/1109/1110 Document number: DS35033 Rev. 3 - 2 4 of 16 www.diodes.com JULY 2011 © Diodes Incorporated A Product Line of Diodes Incorporated NEW PRODUCT Electrical Characteristics (TA = 25°C, VS+ = 20V, VSENSE 5 = 100mV, RGAIN = 0 unless otherwise stated) (cont.) ZXCT1110 Symbol Parameter Conditions TA Min Typ Max Units IQ GND pin current VSENSE 5 = 0V 25°C 3 5 µA -40°C 2.2 125°C 5.8 IS- S- input current 25°C 19 100 nA -40°C 16 125°C 35 CMSR Common-Mode Sense rejection VS+ = 2.5V to 36V 25°C 0.1 0.4 µA/V -40°C 0.13 125°C 0.05 IOO Output Offset current6,7 VSENSE 5 = 10mV 25°C 0 ±4 µA -40°C -1.8 125°C +2.5 GT Transconductance VSENSE 5 = 10mV to 150mV 25°C 3.928 4 4.072 mA/V -40°C 3.9 125°C 4.08 GE Transconductance error VSENSE 5 = 10mV to 150mV 25°C -1.8 1.8 % IOUT GT-TC Transconductance temp.co 25°C 265 ppm/ºC VOUTH Output relative to V S- 25°C -1 -0.78 V -40°C -0.88 125°C -0.63 BW -3dB Small Signal Bandwidth VSENSE (AC) = 10mVPP, RGAIN = 2.5kΩ 25°C 0.65 MHz Notes. 5. V SENSE = “VSENSE+” – “VSENSE-“ 6. Output current characteri stic measured with low impedance ammeter connected to GND 7. Defined as difference between actual output current and 40µA; measured at VSENSE =10mV. This will include an error due to bias currents of the device. 8. For V SENSE > 10mV, the internal voltage-current converter is fully linear. This enables a true offset to be defined and used.

LOW POWER HIGH-SIDE CURRENT MONITORS ZXCT1107/1109/1110 Document number: DS35033 Rev. 3 - 2 5 of 16 www.diodes.com JULY 2011 © Diodes Incorporated A Product Line of Diodes Incorporated NEW PRODUCT Typical Characteristics 01 0 2 0 3 0 4 0 T = 0 ° CA T = 1 2 5 ° CA T = 8 5 ° CA T = 2 5 ° CA T = - 4 0 ° CA V = 0 V V = 0 V OUT SENSE V ( V ) Input Current vs. V I ( µ A)S+ 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (°C) Input Current vs. Ambient Temperature V = 3 . 7 VS+ V = 2 0 VS+ V = 0 V V = 0 V SENSE OUT I ( µ A )S+ 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 01 0 2 03 0 4 0 I ( µ A )S+ V ( V ) I Current vs. V S+ S+ T = 2 5 ° C V = 0 V V = 0 V A OUT SENSE 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 I ( n A )S- T = 2 5 ° C V = 0 V V = 0 V A OUT SENSE 01 0 2 0 3 0 4 0 V ( V ) I Current vs. V S- S+ 500 1000 1500 2000 2500 0 100 200 300 400 500 600 V = 2 0 V V = 0 V OUT T = - 4 0 ° CA T = 0 ° CA T = 2 5 ° CA T = 8 5 ° CA T = 125°CA V ( m V ) Output Current vs. V SENSE SENSE I ( µ A)OUT 100 150 200 250 300 350 400 450 OUTPUT VOLTAGE (V) Output Current vs. Output Voltage OUTPUT CURRENT (µA)

LOW POWER HIGH-SIDE CURRENT MONITORS ZXCT1107/1109/1110 Document number: DS35033 Rev. 3 - 2 6 of 16 www.diodes.com JULY 2011 © Diodes Incorporated A Product Line of Diodes Incorporated NEW PRODUCT Typical Characteristics (cont.) 100 200 300 400 500 600 700 -40 -25 -10 5 20 35 50 65 80 95 110 125 I ( µ A )OUT TEMPERATURE(°C) Output Current vs. Ambient Temperature 500 1000 1500 2000 2500 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE(°C) Output Current vs. Ambient Temperature I ( µ A )OUT 100 200 300 400 500 600 700 0 1 02 03 04 0 V ( V ) Output Current vs. V I ( µ A)OUT 500 1000 1500 2000 2500 01 0 2 0 3 0 4 0 T = 2 5 ° C V = 0 V A OUT V = 500mVSENSE V = 1 5 0 m VSENSE V = 5 0 m VSENSE V = 1 0 0 m VSENSE V = 3 0 m VSENSE V = 5 m VSENSE V = 1 0 m VSENSE V ( V ) Output Current vs. V I ( µ A)OUT 3.85 3.90 3.95 4.00 4.05 4.10 4.15 4.20 0 100 200 300 400 500 600 V = 2 0 V V = 0 V OUT T = 1 2 5 ° CA T 8 5 ° CA T = 2 5 ° CA T = 0 ° CA T = - 4 0 ° CA V ( m V ) Differential Gain vs. V SENSE SENSE DIFFERENTIAL GAIN (mA/V) -0.25% -0.20% -0.15% -0.10% -0.05% 0.00% 0.05% 0.10% 0.15% 0.20% 0.25% 0 10 20 30 40 T = 2 5 ° C V = 0 V A OUT V = 100mVSENSE V = 150mVSENSE V = 500mVSENSE V = 3 0 m VSENSE V = 5 0 m VSENSE V ( V ) Output Current Error vs. V I Error [V = 20V] (%)OUT S+

LOW POWER HIGH-SIDE CURRENT MONITORS ZXCT1107/1109/1110 Document number: DS35033 Rev. 3 - 2 7 of 16 www.diodes.com JULY 2011 © Diodes Incorporated A Product Line of Diodes Incorporated NEW PRODUCT Typical Characteristics (cont.) -4.00% -3.00% -2.00% -1.00% 0.00% 1.00% 2.00% 3.00% 4.00% 0 1 02 03 04 0 T = 125°CA T = 8 5 ° CA T = 2 5 ° CA T = - 4 0 ° CA T = 0 ° CA V = 100mV, V = 0VSENSE OUT V ( V ) Output Current Error vs. V I E RROR [V = 20V] (%)OUT S+

LOW POWER HIGH-SIDE CURRENT MONITORS ZXCT1107/1109/1110 Document number: DS35033 Rev. 3 - 2 8 of 16 www.diodes.com JULY 2011 © Diodes Incorporated A Product Line of Diodes Incorporated NEW PRODUCT Typical AC Characteristics -70 -60 -50 -40 -30 -20 -10 -3.5 -2.5 -1.5 -0.5 V = 0 V , GND = -3.7V R = 1 0 k GAIN OUTPUT VOLTAGE (V) SENSE VOLTAGE (mV) TIME (µs) Small Signal Pulse Response Output Input 0 5 10 15 20 25 30 35 40 45 50 -250 -200 -150 -100 -50 -25 -21 -17 -13 OUTPUT VOLTAGE (V) SENSE VOLTAGE (mV) V = 0 V , GND = -20V R = 1 0 k GAIN Output Input TIME (µs) Large Signal Pulse Response 0 5 10 15 20 25 30 35 40 45 50 -250 -200 -150 -100 -50 -20 -18 -16 -14 -12 -10 V = 0 V , GND = -20V R = 1 0 k GAIN OUTPUT VOLTAGE (V) SENSE VOLTAGE (mV) TIME (µs) Large Signal Pulse Response Output Input 0 5 10 15 20 25 30 35 40 45 50 -25 -20 -15 -10 -20 -19 -18 V = 0 V , GND = -20V R = 1 0 k GAIN OUTPUT VOLTAGE (V) SENSE VOLTAGE (mV) TIME (µs) Small Signal Pulse Response Output Input 0 5 10 15 20 25 30 35 40 45 50 -102 -100 -98 -96 -94 -92 -90 -88 0 5 1 01 52 02 5 30 35 40 45 50 -17 -16.5 -16 -15.5 -15 V = 0 V , GND = -20V R = 1 0 k GAIN OUTPUT VOLTAGE (V) SENSE VOLTAGE (mV) TIME (µs) Small Signal Pulse Response Output Input -112 -110 -108 -106 -104 -102 -100 -98 0 5 10 15 20 25 30 35 40 45 50 -17 -16.8 -16.6 -16.4 -16.2 -16 -15.8 -15.6 -15.4 -15.2 -15 OUTPUT VOLTAGE (V) TIME (µs) Small Signal Pulse Response SENSE VOLTAGE (mV) V = 0 V , GND = -20V R = 1 0 k GAIN Output Input

LOW POWER HIGH-SIDE CURRENT MONITORS ZXCT1107/1109/1110 Document number: DS35033 Rev. 3 - 2 9 of 16 www.diodes.com JULY 2011 © Diodes Incorporated A Product Line of Diodes Incorporated NEW PRODUCT Typical AC Characteristics (cont.) Test Circuit for Pulse Response CMRR (dB) FREQUENCY (Hz) Common Mode Rejection Ratio CMRR 10 100 1k 10k 100k 1M 10M 100 -30 -20 -10 T =25°C V = 20V V = 100mV V = 1 0 m V p p R = 2.5K A SENSE DC SENSE AC GAIN FREQUENCY (Hz) Small Signal Bandwidth GAIN (dB) 10 100 1k 10k 100k 1M 10M Test circuit for CMRR Test circuit for Small signal bandwidth

LOW POWER HIGH-SIDE CURRENT MONITORS ZXCT1107/1109/1110 Document number: DS35033 Rev. 3 - 2 10 of 16 www.diodes.com JULY 2011 © Diodes Incorporated A Product Line of Diodes Incorporated NEW PRODUCT

Application Information

Description

The current monitor ICs ZXCT1107, ZXCT1109 and ZXCT1110 all us e a similar application circuit topology for high-side current sensing, with small differences. The ZXCT1110 has a separate ground pin whereas the ZXCT1107 and ZXCT1109 do not. The use of ZXCT1110 allows reduction of the absolute cu rrent measurement error in some applications by providing a reduced output offset current. The ZXCT1107 provides a mirror image pin assignment of the ZXCT1109 to ease PCB layout in very small equipment designs. The basic application circuit for each device is shown in Figure 1. Two external resistors are required. The resistor R SENSE is connected in the path of the current to be monitored. The resistor RGAIN converts the device output current to a voltage for convenient processing by a further device, such as a comparator, amplifier or analog-to-digital converter within a microcontroller system. The current monitor output current is defined through the nominal transconductance of 4mA/V. I OUT = 0.004 * VSENSE Amp Equation 1 Then the resistors determine the output voltage as described below. S+ZXCT1110 S- RSENSE VSUPPLY OUT LOAD GND RGAIN GND OUTPUT VOUT ILOAD VSENSE Figure 1. Basic Application Circuit

LOW POWER HIGH-SIDE CURRENT MONITORS ZXCT1107/1109/1110 Document number: DS35033 Rev. 3 - 2 11 of 16 www.diodes.com JULY 2011 © Diodes Incorporated A Product Line of Diodes Incorporated NEW PRODUCT Application Information (cont.) The ZXCT1110 is highly linear and has a transconductance of 4mA/V ±1.8% and an out put of 40µA ±4µA at V SENSE=10mV. The output current can therefore be calculated (Standard International Units) as: The worst-case current error is then I OUTERROR = IOUT – IOUTIDEAL = +/- { 4*10-6 + (VSENSE-0.01) * 0.000072 } Amp or I OUTERROR = +/- { 3.28*10-6 + VSENSE * 0.000072 } A The percentage error is % 100 *004 . 0 * V I% 100 *I I SENSE OUTERROR OUTIDEAL OUTERROR == ε Then 004 . 0 * V 0072 . 0 * V 10 * 28 . 3 SENSE SENSE 4 +± = ε or % 8 . 1V 082 . 0 SENSE ± ± = ε Equation 2 This shows that the error is reduced with increasing VSENSE. Then the minimum VSENSE required to give the error ±ε % is 8 . 1 082 . 0VSENSE − ε= V [ only for ZXCT1110] Equation 3 In the application, the effect of the external resistor tolerances must also be taken into account. Table 1: ZXCT1107/ZXCT1109 Error VSENSE Mean IOUT Error Band Percent Error 10mV 45.5 µA ±8.5µA ±18.7% 30mV 124.5 µA ±9.5µA ±7.6% 100mV 408 µA ±14µA ±3.4% 200mV 809.5 µA ±22.5µA ±2.8% Table 2: ZXCT1110 Error VSENSE Mean IOUT Error Band Percent Error 10mV 40µA ±4µA ±10% 30mV 120µA ±5.44µA ±4.53% 100mV 400µA ±10.48µA ±2.62% 200mV 800µA ±17.68µA ±2.21%

value of VSENSE. For VSENSE = 100mV, this margin can be reduced to 1.0V. are available with 1% tolerance. system if desired. Figure 2 shows the resulting schematic. Figure 2. Example Circuit using ZXCT1107/ZXCT1109

A suitable preferred value is 20mΩ. Then the sense voltage will be 2A * 20mΩ = 40mV. A suitable preferred value is 13kΩ. Figure 3. Example Circuit using ZXCT1110 energy to damage the ZXCT11xx before the supply voltage falls to a safe level due to current limit activation. introducing significant current measurement error.

LOW POWER HIGH-SIDE CURRENT MONITORS ZXCT1107/1109/1110 Document number: DS35033 Rev. 3 - 2 15 of 16 www.diodes.com JULY 2011 © Diodes Incorporated A Product Line of Diodes Incorporated NEW PRODUCT

Ordering Information

Order Reference Package Device Marking Reel Size Quantity Per Reel Tape Width (mm) ZXCT1107SA-7 SOT23 1107 7”, 180mm 3000 8 ZXCT1109SA-7 SOT23 1109 7”, 180mm 3000 8 ZXCT1110W5-7 SOT25 1110 7”, 180mm 3000 8 Package Outline Dimensions (All Dimensions in mm) SOT23 Dim Min Max Typ A 0.37 0.51 0.40 B 1.20 1.40 1.30 C 2.30 2.50 2.40 D 0.89 1.03 0.915 F 0.45 0.60 0.535 G 1.78 2.05 1.83 H 2.80 3.00 2.90 J 0.013 0.10 0.05 K 0.903 1.10 1.00 K1 - - 0.400 L 0.45 0.61 0.55 M 0.085 0.18 0.11 α 0° 8° - All Dimensions in mm SOT25 Dim Min Max Typ A 0.35 0.50 0.38 B 1.50 1.70 1.60 C 2.70 3.00 2.80 D ⎯ ⎯ 0.95 H 2.90 3.10 3.00 J 0.013 0.10 0.05 K 1.00 1.30 1.10 L 0.35 0.55 0.40 M 0.10 0.20 0.15 N 0.70 0.80 0.75 α 0° 8° ⎯ All Dimensions in mm A M J L D F B C H K G A M J LD B C H K N

LOW POWER HIGH-SIDE CURRENT MONITORS ZXCT1107/1109/1110 Document number: DS35033 Rev. 3 - 2 16 of 16 www.diodes.com JULY 2011 © Diodes Incorporated A Product Line of Diodes Incorporated NEW PRODUCT IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or ot her changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products desc ribed herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthoriz ed sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fee s arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2011, Diodes Incorporated www.diodes.com

Product Information

ZXCT1107_1107 specifications and overview.

Summary

LOW POWER HIGH-SIDE CURRENT MONITORS Rev 3

Description

LOW POWER HIGH-SIDE CURRENT MONITORS Rev 3

Source title ZXCT1107_1107 Datasheet(PDF) - Diodes Incorporated

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