LTC2054/LTC2054HV Low Power Zero-Drift Operational Amplifiers in SOT-23 U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO Supply Current 175µA (Max), Guaranteed Over Temperature Offset Voltage 3µV (Max) Offset Voltage Drift 30nV/°C (Max) Noise: 1.6µVP-P (0.01Hz to 10Hz Typ) Voltage Gain: 140dB (Typ) PSRR: 130dB (Typ) CMRR: 130dB (Typ) Input Bias Current <1pA (Typ) Supply Operation: 2.7V to 6V (LTC2054) 2.7V to ±5.5V (LTC2054HV) Common Mode Input Range from V– to V+ –0.5V Output Swings Rail-to-Rail Low Profile (1mm) SOT-23 (ThinSOT™) Package The LTC®2054 and LTC2054HV are low power, low noise zero-drift operational amplifiers available in the 5-lead SOT-23 package. The LTC2054 operates from a single 2.7V to 6V supply. The LTC2054HV operates on supplies from 2.7V to ±5.5V. The current consumption is 150µA (typical), 175µA maximum over temperature. The LTC2054, despite its miniature size, features uncompromising DC performance. The typical input offset voltage and offset drift are 0.5µV and 25nV/°C. The almost zero DC offset and drift are supported with a power supply rejection ratio (PSRR) and common mode rejection ratio (CMRR) of more than 130dB. The input common mode voltage ranges from the negative supply up to typically 0.5V from the positive supply. The open-loop gain is typically 140dB. The LTC2054 also features a 1.6µVP-P DC to 10Hz noise and a 500kHz gain bandwidth product. U APPLICATIO S ■ ■ ■ ■ ■ ■ ■ Thermocouple Amplifiers Electronic Scales Medical Instrumentation Strain Gauge Amplifiers High Resolution Data Acquisition DC Accurate RC Active Filters Low Side Current Sense Battery-Powered Systems , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. U ■ TYPICAL APPLICATION Supply Current vs Temperature Differential Bridge Amplifier 250 5V 5V 225 0.1µF 200 499k 4 10kΩ BRIDGE – 5 LTC2054HV 3 0.1µF + 1 AV = 100 SUPPLY CURRENT (µA) 1µF LT1790-2.5 VS = ±5V 175 VS = ±2.5V 150 VS = ±1.5V 125 100 75 50 2 25 499k 0 –45 – 5V 2054 TA01 –25 –5 15 35 55 TEMPERATURE (°C) 75 2054 TA02 2054f 1 LTC2054/LTC2054HV U U RATI GS W W W W AXI U U ABSOLUTE PACKAGE/ORDER I FOR ATIO (Note 1) Total Supply Voltage (V + to V –) LTC2054 .............................................................. 7V LTC2054HV ......................................................... 12V Input Voltage ........................ (V + + 0.3V) to (V – – 0.3V) Output Short-Circuit Duration ......................... Indefinite Operating Temperature Range ............... – 40°C to 85°C Specified Temperature Range (Note 4) ................................................. – 40°C to 85°C Storage Temperature Range ................ – 65°C to 150°C Lead Temperature (Soldering, 10 sec)................. 300°C TOP VIEW 5 V+ OUT 1 – V 2 4 –IN +IN 3 S5 PACKAGE 5-LEAD PLASTIC TSOT-23 TJMAX = 150°C, θJA = 250°C/W ORDER PART NUMBER S5 PART MARKING LTAGB LTAGD LTAGB LTAGD LTC2054CS5 LTC2054HVCS5 LTC2054IS5 LTC2054HVIS5 Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS (LTC2054, LTC2054HV) The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 3V unless otherwise noted. (Note 4) SYMBOL IS VOS ∆VOS/∆T IB PARAMETER Supply Current Input Offset Voltage Average Input Offset Drift Long-Term Offset Drift Input Bias Current CONDITIONS No Load (Note 2) (Note 2) MIN ● TYP 140 ±0.5 ● 50 ±600 (Note 3) ● IOS Input Offset Current ±1.2 (Note 3) ● en CMRR Input Noise Voltage Common Mode Rejection Ratio RS = 100Ω, 0.01Hz to 10Hz VCM = GND to (V + – 0.7V) ● PSRR Power Supply Rejection Ratio VS = 2.7V to 6V ● 115 110 120 115 1.6 130 130 MAX 175 ±3 ±0.03 ±150 ±300 UNITS µA µV µV/°C nV/√mo fA pA pA pA µVP-P dB dB dB dB 2054f 2 LTC2054/LTC2054HV ELECTRICAL CHARACTERISTICS (LTC2054, LTC2054HV) The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 3V unless otherwise noted. (Note 4) SYMBOL AVOL PARAMETER Large-Signal Voltage Gain CONDITIONS RL = 100k, VOUT = VS/2 ● VOUT Output Voltage Swing High VOUT Output Voltage Swing Low SR GBW fS Slew Rate Gain Bandwidth Product Internal Sampling Frequency RL = 5k to GND RL = 100k to GND RL = 5k to GND RL = 100k to GND ● ● MIN 120 115 2.85 2.98 TYP 135 MAX 10 10 ● ● 0.5 500 1.0 UNITS dB dB V V mV mV V/µs kHz kHz (LTC2054, LTC2054HV) VS = 5V unless otherwise noted. (Note 4) SYMBOL IS VOS ∆VOS/∆T CONDITIONS No Load (Note 2) (Note 2) IB PARAMETER Supply Current Input Offset Voltage Average Input Offset Drift Long-Term Offset Drift Input Bias Current IOS Input Offset Current (Note 3) en CMRR Input Noise Voltage Common Mode Rejection Ratio RS = 100Ω, 0.01Hz to 10Hz VCM = GND to (V + – 0.7V) MIN ● TYP 150 ● 50 ±800 (Note 3) ● ±1.6 ● ● PSRR Power Supply Rejection Ratio VS = 2.7V to 6V ● AVOL Large-Signal Voltage Gain RL = 100k, VOUT = VS/2 ● VOUT Output Voltage Swing High VOUT Output Voltage Swing Low SR GBW fS Slew Rate Gain Bandwidth Product Internal Sampling Frequency RL = 5k to GND RL = 100k to GND RL = 5k to GND RL = 100k to GND ● ● 120 115 120 115 125 120 4.75 4.98 MAX 175 ±3 ±0.03 ±150 ±300 1.6 130 130 140 10 10 ● ● 0.5 500 1.0 UNITS µA µV µV/°C nV/√mo fA pA pA pA µVP-P dB dB dB dB dB dB V V mV mV V/µs kHz kHz 2054f 3 LTC2054/LTC2054HV ELECTRICAL CHARACTERISTICS (LTC2054HV) The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = ±5V unless otherwise noted. (Note 4) SYMBOL PARAMETER CONDITIONS IS Supply Current No Load VOS Input Offset Voltage (Note 2) Average Input Offset Drift (Note 2) ∆VOS/∆T MIN ● Input Bias Current MAX 175 210 µA ±0.5 ±5 µV ±0.03 ● Long-Term Offset Drift IB TYP 50 ±1 (Note 3) ● IOS Input Offset Current ±2 (Note 3) ● en Input Noise Voltage RS = 100Ω, 0.01Hz to 10Hz CMRR Common Mode Rejection Ratio VCM = V – to (V + – 0.9V) PSRR AVOL Power Supply Rejection Ratio Large-Signal Voltage Gain µV/°C nV/√mo ±150 pA pA ±300 pA pA 1.6 µVP-P 130 ● 120 115 dB dB 120 115 130 ● dB dB 125 120 140 ● dB dB ● ● ±4.75 ±4.98 VS = 2.7V to 11V RL = 100k, VOUT = GND RL = 5k to GND RL = 100k to GND UNITS VOUT Maximum Output Voltage Swing SR Slew Rate 0.5 V/µs GBW Gain Bandwidth Product 500 kHz fS Internal Sampling Frequency 1.0 kHz Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. Note 2: These parameters are guaranteed by design. Thermocouple effects preclude measurements of these voltage levels during automated testing. Note 3: Limit is determined by high speed automated test capability. See characteristic curves for actual typical performance. For tighter specifications, please consult Linear Technology Marketing. V V Note 4: The LTC2054C, LTC2054HVC are guaranteed to meet specified performance from 0°C to 70°C and are designed, characterized and expected to meet these extended temperature limits, but are not tested at –40°C and 85°C. The LTC2054I, LTC2054HVI are guaranteed to meet the specified performance from –40°C and 85°C. 2054f 4 LTC2054/LTC2054HV U W TYPICAL PERFOR A CE CHARACTERISTICS Common Mode Rejection Ratio vs Frequency DC CMRR vs Common Mode Input Voltage PSRR vs Frequency 140 140 140 VS = 3V OR 5V VCM = 0.5VP-P 120 120 120 100 100 80 60 80 80 PSRR (dB) CMRR (dB) CMRR (dB) 100 VS = 5V VS = 3V 60 60 –PSRR 40 20 40 40 +PSRR 0 20 20 0 0 100 1k FREQUENCY (Hz) 10k 0 100k 1 3 2 4 2054 G02 2054 G01 0 VS = ±1.5V –2 –3 VS = ±2.5V –4 VS = ±5V 0 2 8 6 VS = 5V 4 VS = 3V 0 10 1 OUTPUT CURRENT (mA) 0 –120 GAIN 40 –140 20 –160 0 –180 CL = 30pF CL = 50pF CL = 100pF 100 1k 10k 100k FREQUENCY (Hz) BIAS CURRENT (pA) 60 100 PHASE (DEG) GAIN (dB) –60 VS = ±2.5V VIN = 0.5VP-P –80 RL = 10kΩ –100 –40 10 VS = ±1.5V –2 –5 10 VS = ±2.5V –220 10M 1 OUTPUT CURRENT (mA) 0 4 ±1.5V ±2.5V ±5V 10 1 0.1 –45 IN+, VS = 3V 55 –5 15 35 TEMPERATURE (°C) 75 2054 G05 IN+, VS = 5V 0 –4 IN–, VS = 3V IN+, VS = 10V IN–, VS = 5V –8 IN–, VS = 10V –12 –16 –20 –24 –25 10 Input Bias Current vs Input Common Mode Voltage –200 1M VS = ±5V 2054 G20 Bias Current vs Temperature 80 –20 0 –1 2054 G04 Gain/Phase vs Frequency PHASE 1 –3 2054 G03 100 VS = ±1.5V 2 –4 8 6 4 LOAD RESISTANCE (kΩ) 120 VS = ±2.5V 3 2 –5 VS = ±5V 4 RL TO GND OUTPUT SWING (V) OUTPUT SWING (V) OUTPUT SWING (V) VS = 10V VS = ±1.5V –1 RL TO V– 10 2 1 5 RL TO GND VS = ±2.5V 3 Dual Supply Output Swing vs Output Current 12 VS = ±5V 4 1M LTC2054 • G14 Single Supply Output Swing vs Output Current Output Voltage Swing vs Load Resistance 5 5 VCM (V) INPUT BIAS CURRENT MAGNITUDE (pA) 10 1 –20 VS = ±2.5V VIN = 0.5VRMS –40 100 1k 10k 100k 10 FREQUENCY (Hz) TA = 25°C 0 1 2 3 4 5 6 7 8 9 INPUT COMMON MODE VOLTAGE (V) 10 2054 G13 2054 G06 2054f 5 LTC2054/LTC2054HV U W TYPICAL PERFOR A CE CHARACTERISTICS Input Overload Recovery Input Overload Recovery INPUT (V) Transient Response OUTPUT (V) 2.5 0 INPUT (V) 0 –1 AV = 1 10µs/DIV RL = 100k CL = 50pF VS = ±2.5V VIN = 10kHz 2VP-P 0 0 –2.5 –0.2 AV = –100 2ms/DIV RL = 100k VS = ±2.5V VIN = 50Hz 200mVP-P 2054 G07 2054 G08 Short-Circuit Output Current vs Supply Voltage SHORT-CIRCUIT OUTPUT CURRENT, IOUT (mA) 10 9 8 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 SUPPLY VOLTAGE (V) 10 ISOURCE VOUT = V – 8 6 4 2 0 ISINK VOUT = V + –2 –4 –6 9 10 11 7 8 9 10 11 4 5 6 TOTAL SUPPLY VOLTAGE, V + TO V – (V) 3 2054 G10 Supply Current vs Supply Voltage Supply Current vs Temperature 250 TA = 25°C 190 225 200 SUPPLY CURRENT (µA) SUPPLY CURRENT (µA) 180 170 160 150 140 130 100 75 110 25 4 5 7 8 9 6 TOTAL SUPPLY VOLTAGE (V) 10 2054 G11 VS = ±1.5V 125 50 3 VS = ±2.5V 150 120 100 VS = ±5V 175 0 –45 –25 –5 15 35 55 TEMPERATURE (°C) 75 2054 G12 INPUT REFFERED VOLTAGE NOISE DENSITY (nV/√Hz) 2054 G09 200 2054 G18 OFFSET = 100mV 11 COMMON MODE RANGE (V) AV = –100 2ms/DIV RL = 100k VS = ±2.5V VIN = 50Hz 200mVP-P OFFSET = –100mV Common Mode Input Range vs Supply Voltage 0 0 OUTPUT (V) OUTPUT (V) 1 0.2 Noise Spectrum 100 90 80 70 60 50 40 30 20 10 AV = 100 VS = ±2.5V 0 10 1k 100 FREQUENCY (Hz) 10k 2054 G15 2054f 6 LTC2054/LTC2054HV TEST CIRCUITS DC-10Hz Noise Test Circuit Electrical Characteristics Test Circuit 100k 100k 475k OUTPUT V+ 10Ω 4 – 10Ω 5 LTC2054 3 + 4 – 1 LTC2054 3 2 0.01µF RL + 1 158k 316k 475k – 0.1µF 0.01µF LT1012 TO X-Y RECORDER + V– 2054 TC01 FOR 1Hz NOISE BW INCREASE ALL THE CAPACITORS BY A FACTOR OF 10. 2054 TC02 U W U U APPLICATIONS INFORMATION Clock Feedthrough, Input Bias Current The LTC2054 uses auto-zeroing circuitry to achieve an almost zero DC offset over temperature, common mode voltage, and power supply voltage. The frequency of the clock used for auto-zeroing is typically 1.0kHz. The term clock feedthrough is broadly used to indicate visibility of this clock frequency in the op amp output spectrum. There are typically two types of clock feedthrough in auto zeroed op amps like the LTC2054. The first form of clock feedthrough is caused by the settling of the internal sampling capacitor and is input referred; that is, it is multiplied by the closed loop gain of the op amp. This form of clock feedthrough is independent of the magnitude of the input source resistance or the magnitude of the gain setting resistors. The LTC2054 has a residue clock feedthrough of less then 0.2µVRMS input referred at 1.0kHz. The second form of clock feedthrough is caused by the small amount of charge injection occurring during the sampling and holding of the op amp’s input offset voltage. The current spikes are multiplied by the impedance seen at the input terminals of the op amp, appearing at the output multiplied by the closed loop gain of the op amp. To reduce this form of clock feedthrough, use smaller valued gain setting resistors and minimize the source resistance at the input. If the resistance seen at the inputs is less than 10k, this form of clock feedthrough is less than the amount of residue clock feedthrough from the first form described above. Placing a capacitor across the feedback resistor reduces either form of clock feedthrough by limiting the bandwidth of the closed loop gain. Input bias current is defined as the DC current into the input pins of the op amp. The same current spikes that cause the second form of clock feedthrough described above, when averaged, dominate the DC input bias current of the op amp below 70°C. At temperatures above 70°C, the leakage of the ESD protection diodes on the inputs increases the input bias currents of both inputs in the positive direction, while the current caused by the charge injection stays relatively constant. At elevated temperatures (above 85°C) the leakage current begins to dominate and both the negative and positive pin’s input bias currents are in the positive direction (into the pins). 2054f 7 LTC2054/LTC2054HV U W U U APPLICATIONS INFORMATION LTC2054 DC to 1Hz Noise 0.4µV 2054 G16 10 SEC LTC2054 DC to 10Hz Noise 1µV 2054 G17 1 SEC 2054f 8 LTC2054/LTC2054HV U U W U APPLICATIONS INFORMATION LTC2054 Extended Common Mode Range The LTC2054 input stage is designed to allow nearly railto-rail input common-mode signals. In addition, signals that extend beyond the allowed input common-mode range do not cause output inversion. INPUT VIN = 2V/DIV Extended Common Mode Range OUTPUT VOUT = 2V/DIV Voltage Follower with Input Exceeding the Common Mode Range 2.5V 2 1k ±3.75VP SINE WAVE – 7 LTC2054 3 + 4 6 OUTPUT 100k –2.5V AV = 1 500µs/DIV RL = 100k VS = ±2.5V VIN = 500Hz 7.5VP-P 2054 G19 2054 TA09 2054f 9 LTC2054/LTC2054HV U TYPICAL APPLICATIONS Gain of 1001 Single Supply Instrumentation Amplifier 0.1µF 1k 1M V+ 1M 4 V+ 5 – LTC2054 –VIN 3 + 1k 1 4 5 – LTC2054 2 +VIN 3 + 1 VOUT 2 OUTPUT DC OFFSET ≤ 6mV FOR 0.1% RESISTORS, CMRR = 54dB 2054 TA04 Instrumentation Amplifier with 100V Common Mode Input Voltage 1k 1M V+ 1M 4 + VIN – LTC2054HV 1M 3 – 1k + V+ 5 2 V– 1 1k 4 5 – LTC2054HV 3 + 1 VOUT 2 V – OUTPUT OFFSET ≤ 3mV FOR 0.1% RESISTORS, CMRR = 54dB 2054 TA06 2054f 10 LTC2054/LTC2054HV U PACKAGE DESCRIPTIO S5 Package 5-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1635) 0.62 MAX 0.95 REF 2.90 BSC (NOTE 4) 1.22 REF 1.4 MIN 3.85 MAX 2.62 REF 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 – 0.45 TYP 5 PLCS (NOTE 3) 0.95 BSC 0.80 – 0.90 0.20 BSC 0.01 – 0.10 1.00 MAX DATUM ‘A’ 0.30 – 0.50 REF 0.09 – 0.20 (NOTE 3) NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 1.90 BSC S5 TSOT-23 0302 2054f 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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 11 LTC2054/LTC2054HV U TYPICAL APPLICATIONS Ground Referred Precision Current Sources 10k 4 LT1634-1.25 100k V+ 330pF 5 – LTC2054 3 Ultra-Precision, Wide Dynamic Range Photodiode Amplifier + 1k 1 5V – LTC2054HV 2 ANY PHOTODIODE RSET + VBIAS 1.25V IOUT = ——— RSET –5V GAIN = 0.1V/µA 50µA FULL SCALE VOUT – 0 ≤ IOUT ≤ 100µA 0.2V ≤ VOUT ≤ (V+) – 1.5V + 2054 TA10 2054 TA05 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LTC1049 Low Power Zero-Drift Op Amp Low Supply Current 200µA LTC1050 Precision Zero-Drift Op Amp Single Supply Operation 4.75V to 16V, Noise Tested and Guaranteed LTC1051/LTC1053 Precision Zero-Drift Op Amp Dual/Quad Version of the LTC1050 ±15V Zero-Drift Op Amp LTC1150 High Voltage Operation ±18V LTC1152 Rail-to-Rail Input and Output Zero-Drift Op Amp Single Zero-Drift Op Amp with Rail-to-Rail Input and Output and Shutdown LT1677 Low Noise Rail-to-Rail Input and Ouptput Precision Op Amp VOS = 90µV, VS = 2.7V to 44V LT1884/LT1885 Rail-to-Rail Output Precision Op Amp VOS = 50µV, IB = 400pA, VS = 2.7V to 40V LTC2050 Zero-Drift Op Amp Enhanced Output Drive Capability LTC2051/LTC2052 Dual/Quad Zero-Drift Op Amp Dual/Quad Version of the LTC2050 in MS8/GN16 Package LTC2053 Rail-to-Rail Input Zero-Drift Instrumentation Amp 2054f 12 Linear Technology Corporation LT/TP 0104 1K • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2003