LT6010

LT6010 - 135µA, 14nV/rtHz, Rail-to-Rail Output Precision Op Amp with Shutdown

Document overview

• Manufacturer or author: Linear Technology Corporation
• PDF pages: 16

Technical content

FEATURES

n Precision Photo Diode Amplifiers n Instrumentation Amplifiers n Battery-Powered Precision Systems n 35mV Maximum Offset Voltage n 110pA Maximum Input Bias Current n 135mA Supply Current n Rail-to-Rail Output Swing n 12mA Supply Current in Shutdown n 120dB Minimum Voltage Gain (VS = –15V) n 0.8mV/°C Maximum VOS Drift n 14nV/ÖHz Input Noise Voltage n 2.7V to –18V Supply Voltage Operation n Operating Temperature Range: – 40°C to 85°C n Space Saving 3mm · 3mm DFN Package 135mA, 14nV/ÖHz, Rail-to-Rail Output Precision Op Amp with Shutdown , LTC and LT are registered trademarks of Linear Technology Corporation. The LT 6010 op amp combines low noise and high preci- sion input performance with low power consumption and rail-to-rail output swing. Input offset voltage is trimmed to less than 35mV. The low drift and excellent long-term stability guarantee a high accuracy over temperature and over time. The 110pA maximum input bias current and 120dB minimum voltage gain further maintain this precision over operating conditions. The LT6010 works on any power supply voltage from 2.7V to 36V, and draws only 135mA of supply current on a 5V supply. A power saving shutdown feature reduces supply current to 12 mA. The output voltage swings to within 40mV of either supply rail, making the amplifier a good choice for low voltage single supply operation. The LT6010 is fully specified at 5V and –15V supplies and from –40°C to 85°C. The device is available in SO-8 and space-saving 3mm · 3mm DFN packages. This op amp is also available in dual (LT6011) and quad (LT6012) packages. Single Supply Current Source for Platinum RTD VS VS 12.4k 0.1% 100Ω 0.1µF AT 0°C RTD* 1k, 5% 1k, 5% V OUT = 100mV AT 0°C + 385µV/°C –50°C TO 600°C

6010 TA01a

VS = 2.7V TO 20V ICC » 320µA *OMEGA F3141 1kΩ , 0.1% PLATINUM RTD (800) 826-6342 LT6010 1 2 1µF LT1790-1.25 Distribution of Offset Voltage Drift DISTRIBUTION (µV/°C) PERCENTAGE OF UNITS (%)

6010 TA01b

0 0.4 0.6 0.80.2 VS = –2.5V SO-8 PACKAGES

Operating Temperature Range (Note 4) .. – 40°C to 85°C Specified Temperature Range (Note 5) ... – 40°C to 85°C ORDER PART NUMBER DD PART MARKING* TJMAX = 125°C, qJA = 160°C/W UNDERSIDE METAL INTERNALLY CONNECTED TO V– (PCB CONNECTION OPTIONAL) LT6010CDD LT6010IDD LT6010ACDD LT6010AIDD (Note 1)ABSOLUTE AXI U RATI GSW WW U PACKAGE/ORDER I FOR ATIOUU W *Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. TOP VIEW DD PACKAGE 8-LEAD (3mm · 3mm) PLASTIC DFN 1NULL –IN +IN V NULL V OUT SHDN ORDER PART NUMBER S8 PART MARKING LT6010CS8 LT6010IS8 LT6010ACS8 LT6010AIS8 6010 6010I 6010A 6010AI TJMAX = 150°C, qJA = 190°C/W TOP VIEW NULL OUT SHDN NULL –IN +IN V S8 PACKAGE 8-LEAD PLASTIC SO Maximum Junction Temperature Storage Temperature Range LADU The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 5V, 0V; VCM = 2.5V; RL to 0V; SHDN = 0.2V, unless otherwise specified. (Note 5)

ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VOS Input Offset Voltage (Note 7) LT6010AS8 10 35 mV TA = 0°C to 70°C l 60 mV TA = –40°C to 85°C l 75 mV LT6010S8 20 55 mV TA = 0°C to 70°C l 85 mV TA = –40°C to 85°C l 110 mV LT6010ADD 20 60 mV TA = 0°C to 70°C l 85 mV TA = –40°C to 85°C l 100 mV LT6010DD 30 80 mV TA = 0°C to 70°C l 110 mV TA = –40°C to 85°C l 135 mV D VOS/D T Input Offset Voltage Drift (Note 6) LT6010AS8, LT6010S8 l 0.2 0.8 mV/°C LT6010ADD,LT6010DD l 0.2 1.3 mV/°C

The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 5V, 0V; VCM = 2.5V; RL to 0V; SHDN = 0.2V, unless otherwise specified. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IOS Input Offset Current (Note 7) LT6010AS8 20 110 pA TA = 0°C to 70°C l 150 pA TA = –40°C to 85°C l 200 pA LT6010S8 40 200 pA TA = 0°C to 70°C l 300 pA TA = –40°C to 85°C l 400 pA LT6010ADD 20 200 pA TA = 0°C to 70°C l 300 pA TA = –40°C to 85°C l 400 pA LT6010DD 40 300 pA TA = 0°C to 70°C l 400 pA TA = –40°C to 85°C l 500 pA IB Input Bias Current (Note 7) LT6010AS8 20 –110 pA TA = 0°C to 70°C l –150 pA TA = –40°C to 85°C l –200 pA LT6010S8 40 –200 pA TA = 0°C to 70°C l –300 pA TA = –40°C to 85°C l –400 pA LT6010ADD 20 –200 pA TA = 0°C to 70°C l –300 pA TA = –40°C to 85°C l –400 pA LT6010DD 40 –300 pA TA = 0°C to 70°C l –400 pA TA = –40°C to 85°C l –500 pA Input Noise Voltage 0.1Hz to 10Hz 400 nV P-P en Input Noise Voltage Density f = 1kHz 14 nV/ ÖHz in Input Noise Current Density f = 1kHz 0.1 pA/ ÖHz RIN Input Resistance Common Mode, V CM = 1V to 3.8V 10 120 G W Differential 20 M W CIN Input Capacitance 4p F VCM Input Voltage Range (Positive) Guaranteed by CMRR l 3.8 4 V Input Voltage Range (Negative) Guaranteed by CMRR l 0.7 1 V CMRR Common Mode Rejection Ratio V CM = 1V to 3.8V l 107 135 dB Minimum Supply Voltage Guaranteed by PSRR l 2.4 2.7 V PSRR Power Supply Rejection Ratio V S = 2.7V to 36V, VCM = 1/2VS l 112 135 dB AVOL Large-Signal Voltage Gain R L = 10k, VOUT = 1V to 4V l 300 2000 V/mV RL = 2k, VOUT = 1V to 4V l 250 2000 V/mV VOUT Maximum Output Swing No Load, 50mV Overdrive 35 55 mV (Positive, Referred to V +) l 65 mV ISOURCE = 1mA, 50mV Overdrive 120 170 mV l 220 mV Maximum Output Swing No Load, 50mV Overdrive 40 55 mV (Negative, Referred to 0V) l 65 mV ISINK = 1mA, 50mV Overdrive 150 225 mV l 275 mV

ELECTRICAL CHARACTERISTICSThe l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 5V, 0V; VCM = 2.5V; RL to 0V; SHDN = 0.2V, unless otherwise specified. (Note 5) The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = –15V, VCM = 0V, RL to 0V; SHDN = –14.8V, unless otherwise specified. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VOS Input Offset Voltage (Note 7) LT6010AS8 10 60 mV TA = 0°C to 70°C l 80 mV TA = –40°C to 85°C l 110 mV LT6010S8 20 85 mV TA = 0°C to 70°C l 120 mV TA = –40°C to 85°C l 160 mV LT6010ADD 20 85 mV TA = 0°C to 70°C l 105 mV TA = –40°C to 85°C l 135 mV LT6010DD 30 110 mV TA = 0°C to 70°C l 145 mV TA = –40°C to 85°C l 185 mV DVOS/DT Input Offset Voltage Drift (Note 6) LT6010AS8, LT6010S8 l 0.2 0.8 mV/°C LT6010ADD,LT6010DD l 0.2 1.3 mV/°C IOS Input Offset Current (Note 7) LT6010AS8 20 110 pA TA = 0°C to 70°C l 150 pA TA = –40°C to 85°C l 200 pA LT6010S8 40 200 pA TA = 0°C to 70°C l 300 pA TA = –40°C to 85°C l 400 pA LT6010ADD 20 200 pA TA = 0°C to 70°C l 300 pA TA = –40°C to 85°C l 400 pA SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS ISC Output Short-Circuit Current (Note 3) V OUT = 0V, 1V Overdrive (Source) 10 14 mA l 4m A VOUT = 5V, –1V Overdrive (Sink) 10 21 mA l 4m A SR Slew Rate A V = –10, RF = 50k, RG = 5k 0.06 0.09 V/ ms TA = 0°C to 70°C l 0.05 V/ ms TA = –40°C to 85°C l 0.04 V/ ms GBW Gain Bandwidth Product f = 10kHz 250 330 kHz l 225 kHz ts Settling Time A V = –1, 0.01%, VOUT = 1.5V to 3.5V 45 ms tr, tf Rise Time, Fall Time A V = 1, 10% to 90%, 0.1V Step 1 ms ISHDN SHDN Pin Current SHDN £ V– + 0.2V (On) l 0.25 mA SHDN = V– + 2.0V (Off) l 15 25 mA tSHDN SHDN Turn-On, Turn-Off Time SHDN = V – (On) to V– + 2.0V (Off) 25 ms SHDN = V– + 2.0V (Off) to V– (On) 25 ms IS Supply Current SHDN £ V– + 0.2V (On) 135 150 mA TA = 0°C to 70°C l 190 mA TA = –40°C to 85°C l 210 mA SHDN = V– + 2.0V (Off) 12 25 mA l 50 mA

ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = –15V, VCM = 0V, RL to 0V; SHDN = –14.8V, unless otherwise specified. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IOS Input Offset Current (Note 7) LT6010DD 40 300 pA TA = 0°C to 70°C l 400 pA TA = –40°C to 85°C l 500 pA IB Input Bias Current (Note 7) LT6010AS8 20 –110 pA TA = 0°C to 70°C l –150 p A TA = –40°C to 85°C l –200 pA LT6010S8 40 –200 pA TA = 0°C to 70°C l –300 p A TA = –40°C to 85°C l –400 pA LT6010ADD 20 –200 pA TA = 0°C to 70°C l –300 pA TA = –40°C to 85°C l –400 pA LT6010DD 40 –300 pA TA = 0°C to 70°C l –400 pA TA = –40°C to 85°C l –500 pA Input Noise Voltage 0.1Hz to 10Hz 400 nV P-P en Input Noise Voltage Density f = 1kHz 13 nV/ ÖHz in Input Noise Current Density f = 1kHz 0.1 pA/ ÖHz RIN Input Resistance Common Mode, V CM = –13.5V 50 400 G W Differential 20 M W CIN Input Capacitance 4p F VCM Input Voltage Range Guaranteed by CMRR l –13.5 –14 V CMRR Common Mode Rejection Ratio V CM = –13.5V to 13.5V 115 135 d B l 112 dB Minimum Supply Voltage Guaranteed by PSRR l –1.2 –1.35 V PSRR Power Supply Rejection Ratio V S = –1.35V to –18V l 112 135 dB AVOL Large-Signal Voltage Gain R L = 10k, VOUT = –13.5V to 13.5V 1000 2000 V/mV l 600 V/mV RL = 5k, VOUT = –13.5V to 13.5V 500 1500 V/mV l 300 V/mV VOUT Maximum Output Swing No Load, 50mV Overdrive 45 80 mV (Positive, Referred to V+) l 100 mV ISOURCE = 1mA, 50mV Overdrive 140 195 mV l 240 mV Maximum Output Swing No Load, 50mV Overdrive 45 80 mV (Negative, Referred to 0V) l 100 mV ISINK = 1mA, 50mV Overdrive 150 250 mV l 300 mV ISC Output Short-Circuit Current (Note 3) V OUT = 0V, 1V Overdrive (Source) 10 15 mA l 5m A VOUT = 0V, –1V Overdrive (Sink) 10 20 mA l 5m A

Note 1: Absolute Maximum Ratings are those beyond which the life of the device may be impaired. Note 2: The inputs are protected by back–to–back diodes and internal series resistors. If the differential input voltage exceeds 10V, the input current must be limited to less than 10mA. Note 3: A heat sink may be required to keep the junction temperature below absolute maximum ratings. Note 4: Both the LT6010C and LT6010I are guaranteed functional over the operating temperature range of –40°C to 85°C. Note 5: The LT6010C is guaranteed to meet the specified performance from 0°C to 70°C and is designed, characterized and expected to meet specified performance from –40°C to 85°C but is not tested or QA sampled at these temperatures. The LT6010I is guaranteed to meet specified performance from –40°C to 85°C. Note 6: This parameter is not 100% tested. Note 7: The specifications for VOS, IB and IOS depend on the grade and on the package. The following table clarifies the notations used in the specification table: Standard Grade A Grade TYPICAL PERFOR A CE CHARACTERISTICS UW Distribution of Input Offset Voltage Input Offset Voltage vs Temperature Offset Voltage vs Input Common Mode Voltage –25 INPUT OFFSET VOLTAGE (µV) PERCENT OF UNITS (%)

6010 G01

–45 –35 –15 –5 5 15 25 35 45 VS = 5V, 0V TA = 25°C LT6010AS8 TEMPERATURE (°C) –50 –125 OFFSET VOLTAGE (µV) –100 –50 –25 125 0 50 75

6010 G02

–75 100 –25 25 100 125 VS = 5V, 0V REPRESENTATIVE UNITS INPUT COMMON MODE VOLTAGE (V) –15 120 100 –20 01 0

6010 G03

–10 –5 51 5 OFFSET VOLTAGE (µV) TA = 85°C TA = 25°C TA = –40°C VS = –15V TYPICAL PART SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS SR Slew Rate A V = –10, RF = 50k, RG = 5k 0.08 0.11 V/ ms TA = 0°C to 70°C l 0.07 V/ ms TA = –40°C to 85°C l 0.05 V/ ms GBW Gain Bandwidth Product f = 10kHz 275 350 kHz l 250 kHz ts Settling Time A V = –1, 0.01%, VOUT = 0V to 10V 85 ms tr, tf Rise Time, Fall Time A V = 1, 10% to 90%, 0.1V Step 1 ms ISHDN SHDN Pin Current SHDN £ V– + 0.2V (On) l 0.25 mA SHDN = V– + 2.0V (Off) l 15 25 mA tSHDN SHDN Turn-On, Turn-Off Time SHDN = V – (On) to V– + 2.0V (Off) 25 ms SHDN = V– + 2.0V (Off) to V– (On) 25 ms IS Supply Current SHDN £ V– + 0.2V (On) 260 330 mA TA = 0°C to 70°C l 380 mA TA = –40°C to 85°C l 400 mA SHDN = V– + 2.0V (Off) 18 50 mA The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = –15V, VCM = 0V, RL to 0V; SHDN = –14.8V, unless otherwise specified. (Note 5)

vs Source Resistance 0.1Hz to 10Hz Noise SOURCE RESISTANCE (Ω ) 100 1k 10k 100k 1M 10M

0.0001 TOTAL INPUT NOISE (µV/√Hz)

0.01 100M

6010 G07

0.001 0.1 TOTAL NOISE RESISTOR NOISE ONLY VS = 5V, 0V TA = 25°C f = 1kHz 0.01Hz to 1Hz Noise TIME (SEC) NOISE VOLTAGE (0.2µV/DIV)

6010 G08

VS = –15V TA = 25°C TIME (SEC) NOISE VOLTAGE (0.2µV/DIV)

6010 G09

20 40 60 100 7010 30 50 90 VS = –15V TA = 25°C TYPICAL PERFOR A CE CHARACTERISTICS UW Output Voltage Swing vs Temperature Output Saturation Voltage vs Load Current (Output High) Output Saturation Voltage vs Load Current (Output Low) TEMPERATURE (°C) –5 0 OUTPUT VOLTAGE SWING (mV) –20

6010 G10

–2 5 0 5 0 –40 –60 75 100 125 VS = 5V, 0V NO LOAD OUTPUT HIGH OUTPUT LOW LOAD CURRENT (mA) 0.01 0.01OUTPUT HIGH SATURATION VOLTAGE (V) 0.1 0.1 1 10

6010 G11

TA = 85°C TA = 25°C VS = 5V, 0V TA = –40°C LOAD CURRENT (mA) 0.01 0.01OUTPUT LOW SATURATION VOLTAGE (V) 0.1 0.1 1 10

6010 G12

TA = 85°C TA = 25°C VS = 5V, 0V TA = –40°C Input Bias Current vs Temperature Input Bias Current vs Input Common Mode Voltage en, in vs Frequency TEMPERATURE (°C) –50 INPUT BIAS CURRENT (pA) –100 200 100 400 300 600 500

6010 G04

0–25 75 10025 IB– IB+ 125 800 700 900 1000 VS = 5V, 0V TYPICAL PART FREQUENCY (Hz) INPUT VOLTAGE NOISE DENSITY (nV/√Hz) INPUT CURRENT NOISE DENSITY (fA/√Hz) 100 100 1000 10 100 1000

6010 G06

VS = –15V TA = 25°C 2V/DIV 20pA/DIV –100 100

6010 G05

–15 15 TA = –40°C TA = 85°C TA = 25°C

TYPICAL PERFOR A CE CHARACTERISTICS UW THD + Noise vs Frequency Settling Time vs Output Step Settling Time vs Output Step FREQUENCY (Hz)

0.0001 THD + NOISE (%)

0.01 1k 10k100

6010 G16

0.001 0.1 VS = –15V VIN = 20VP-P TA = 25°C AV = –1 AV = 1 SETTLING TIME (µs) OUTPUT STEP (V) 20 40 50 90

6010 G17

VS = –15V AV = 1 0.1% 0.01% SETTLING TIME (µs) OUTPUT STEP (V) 20 40 50 90

6010 G18

VS = –15V AV = –1 0.1% 0.01% CMRR vs Frequency PSRR vs Frequency FREQUENCY (Hz) 11 0 COMMON MODE REJECTION RATIO (dB) 100 120 100 1k 10k 100k 1M

6010 G20

160 TA = 25°C

VS = –15V VS = 5V, 0V FREQUENCY (Hz) 0.1 POWER SUPPLY REJECTION RATIO (dB) 100 120 140 1 10 100 1k 10k 100k 1M

6010 G21

VS = 5V, 0V TA = 25°C –PSRR +PSRR Supply Current vs Supply Voltage Warm-Up Drift THD + Noise vs Frequency SUPPLY VOLTAGE (–V) SUPPLY CURRENT (µA) 300 400 500

6010 G13

TA = 85°C TA = –40°C TA = 25°C TIME AFTER POWER-ON (SECONDS) CHANGE IN OFFSET VOLTAGE (µV) 30 60 90 120

6010 G14

–15V –2.5V FREQUENCY (Hz) 0.01 1k 10k100 100k

6010 G15

0.001 0.1 VS = 5V, 0V VOUT = 2VP-P TA = 25°C AV = 1: RL = 10k AV = –1: RF = RG = 10k AV = –1 AV = 1

TYPICAL PERFOR A CE CHARACTERISTICS UW Gain vs Frequency, AV = 1 Gain vs Frequency, A V = –1 FREQUENCY (Hz) –20 GAIN (dB) 10k 100k 1M

6010 G25

–10 –15 VS = 5V, 0V TA = 25°C CL = 500pF CL = 50pF FREQUENCY (Hz) –20 GAIN (dB) 10k 100k 1M

6010 G26

–10 –15 VS = 5V, 0V TA = 25°C CL = 500pF CL = 50pF Small-Signal Transient Response Large-Signal Transient Response Rail-to-Rail Output Swing 20mV/DIV AV = 1 2 ms/DIV 6011 G27 2V/DIV AV = –1 50 ms/DIV 6011 G28 VS = –15V 1V/DIV AV = –1 100 ms/DIV 6011 G29 VS = 5V, 0V Supply Current in Shutdown Mode vs Temperature Output Impedance vs Frequency Open-Loop Gain vs Frequency Gain and Phase vs Frequency FREQUENCY (Hz) OUTPUT IMPEDANCE (Ω ) 1000 0.1 100 1 100 1k 10k 100k 1M

6010 G22

0.01 VS = 5V, 0V TA = 25°C AV = 100 AV = 10 AV = 1 FREQUENCY (Hz) 120 100 –20 OPEN-LOOP GAIN (dB) 140 0.01 10 100 1k 10k 100k 1M 10M

6010 G23

–40 0.1 1 VS = 5V, 0V TA = 25°C RL = 10k FREQUENCY (Hz) –10OPEN-LOOP GAIN (dB) PHASE SHIFT (DEG) –2 0 –30 1k 100k 1M 10M

6010 G24

–4 0 –80 – 240 –120 –160 –200 –280 10k PHASE GAIN VS = 5V, 0V TA = 25°C RL = 10k TEMPERATURE (°C) –40 SUPPLY CURRENT IN SHUTDOWN (µA)

6010 G30

–20–30 0 30 40 60 70 9020 50 VS = –15V VS = 5V, 0V 10–10

Preserving Input Precision Preserving the input accuracy of the LT6010 requires that the applications circuit and PC board layout do not intro- duce errors comparable to or greater than the 20mV typical offset of the amplifier. Temperature differentials across the input connections can generate thermocouple volt- ages of 10’s of microvolts, so the connections to the input leads should be short, close together, and away from heat dissipating components. Air currents across the board can also generate temperature differentials. The extremely low input bias currents (20pA typical) allow high accuracy to be maintained with high impedance sources and feedback resistors. The LT6010 low input bias currents are obtained by a cancellation circuit on- chip. The input bias currents are permanently trimmed at wafer testing to a low level. Do not try to balance the input resistances in each input lead; instead, keep the resistance at either input as low as possible for maximum accuracy. Leakage currents on the PC board can be higher than the LT6010’s input bias current. For example, 10GW of leak- age between a 15V supply lead and an input lead will gen- erate 1.5nA! Surround the input leads by a guard ring, driven to the same potential as the input common mode, to avoid excessive leakage in high impedance applications. Input Protection The LT6010 features on-chip back-to-back diodes be- tween the input devices, along with 500 W resistors in series with either input. This internal protection limits the input current to approximately 10mA (the maximum allowed) for a 10V differential input voltage. Use additional external series resistors to limit the input current to 10mA in applications where differential inputs of more than 10V are expected. For example, a 1k resistor in series with each input provides protection against 30V differential voltage. Input Common Mode Range The LT6010 output is able to swing nearly to each power supply rail (rail-to-rail out), but the input stage is limited to operating between V – + 1V and V+ – 1.2V. Exceeding this common mode range will cause the gain to drop to zero, however no phase reversal will occur. Total Input Noise The LT6010 amplifier contributes negligible noise to the system when driven by sensors (sources) with impedance between 20kW and 1M W . Throughout this range, total input noise is dominated by the 4kTRS noise of the source. If the source impedance is less than 20k W , the input voltage noise of the amplifier starts to contribute with a minimum noise of 14nV/ÖHz for very low source imped- ance. If the source impedance is more than 1MW , the input current noise of the amplifier, multiplied by this high impedance, starts to contribute and eventually dominate. Total input noise spectral density can be calculated as: v e kTR i Rn TOTAL n S n S() ()=+ + 2 24 where en = 14nV/ ÖHz, in = 0.1pA/ÖHz and R S the total impedance at the input, including the source impedance. APPLICATIO S I FOR ATIOWU UU

APPLICATIO S I FOR ATIOWU UU Offset Voltage Adjustment The input offset voltage of the LT6010 and its drift with temperature are permanently trimmed at wafer testing to the low level as specified in the electrical characteristic. However, if further adjustment of V OS is desired, nulling with a 50k potentiometer is possible and will not degrade drift with temperature. Trimming to a value other than zero

6010 F01a

6010 F02a

CHANGE IN OFFSET VOLTAGE (mV)

6010 F01b

1.0 0.8 0.6 0.4 0.2 –0.2 –0.4 –0.6 –0.8 –1.0 POTENTIOMETER POSITION 0 1.0 CHANGE IN OFFSET VOLTAGE (µV)

6010 F02b

–200 200 150 100 –50 –100 –150 0.2 0.4 0.6 0.8 Standard Adjustment Improved Sensitivity Adjustment Figure 1A Figure 1B Figure 2A Figure 2B creates a drift of (VOS/300mV) mV/°C, e.g., if VOS is adjusted to 300mV, the change in drift will be 1mV/°C. The adjustment range with a 50k pot is approximately –0.9mV (see Figures 1A and 1B). The sensitivity and resolution of the nulling can be improved by using a smaller pot in conjunction with fixed resistors. The configuration shown has an approximate nulling range of –150mV (see Figures 2A and 2B).

above the negative supply, the part operates normally. drops to about 12mA, shutting down the op amp. feature cannot be used for multiplexing applications. Figure 3). For an example of suggested values see Table 1. is 2V above the negative supply.

2 NONE

whether or not the op amp must have rail-to-rail inputs.

6010 F03

6010 F04

Figure 4. Some Op Amp Configurations Do Not Require

C B A B A Q15 Q1 Q2 D2D1 Q11 Q10 Q21 Q12 Q14 Q20 Q19 Q13 Q18 R3 R4 R6R5 RC1 500Ω 500Ω +IN –IN OUT Q9 Q10 NULL NULL1 SHDN 5 BIAS CURRENT GENERATOR

8-Lead Plastic DFN (3mm · 3mm) (Reference LTC DWG # 05-08-1698) 3.00 –0.10 (4 SIDES) NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1) 2. ALL DIMENSIONS ARE IN MILLIMETERS 3. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 4. EXPOSED PAD SHALL BE SOLDER PLATED 0.38 – 0.10 BOTTOM VIEW—EXPOSED PAD 1.65 – 0.10 (2 SIDES) 0.75 –0.05 R = 0.115 TYP 2.38 –0.10 (2 SIDES) PIN 1 TOP MARK

0.200 REF

0.00 – 0.05 (DD8) DFN 0203 0.28 – 0.05 2.38 –0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 1.65 –0.05 (2 SIDES)2.15 –0.05 0.50 BSC 0.675 –0.05 3.5 –0.05 PACKAGE OUTLINE 0.28 – 0.05

0.50 BSC

8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .016 – .050 (0.406 – 1.270) .010 – .020 0°– 8° TYP .008 – .010 (0.203 – 0.254) SO8 0303 .053 – .069 (1.346 – 1.752) .014 – .019 (0.355 – 0.483) TYP .004 – .010 (0.101 – 0.254) .050 (1.270) BSC 1 2 3 4 .150 – .157 (3.810 – 3.988) NOTE 3 8 7 6 5 .189 – .197 (4.801 – 5.004) NOTE 3 .228 – .244 (5.791 – 6.197) .245 MIN .160 –.005 RECOMMENDED SOLDER PAD LAYOUT .045 –.005 .050 BSC .030 –.005 TYP INCHES (MILLIMETERS) NOTE: 1. DIMENSIONS IN 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 l FAX: (408) 434-0507 l www.linear.com ª LINEAR TECHNOLOGY CORPORATION 2003 LT/TP 1203 1K • PRINTED IN USA PART NUMBER DESCRIPTION COMMENTS LT6011/6012 Dual/Quad Precision Op Amps 135 mA, Rail-to-Rail Output LT1001 Low Power, Picoamp Input Precision Op Amp 250pA Input Bias Current LT1880 Rail-to-Rail Output, Picoamp Input Precision Op Amp C LOAD up to 1000pF RELATED PARTS UTYPICAL APPLICATIO Precision JFET Input Transimpedance Photodiode Amplifier

6010 TA02

0.5pF 1pF LT6010 LT6230 V–R1 330k, 5% 100k, 1% 0.01µF 0.1µF J1: PHILIPS BF862 S1: SIEMENS/INFINEON SFH203 PHOTODIODE (~3pF) V SUPPLY = –5V ISUPPLY = 5.6mA BANDWIDTH = 6MHz A Z = 100kΩ OUTPUT OFFSET ≈ 50µV TYPICALLY VOUT 2.55k