LT1006 Precision, Single Supply Op Amp U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO The LT ®1006 is the first precision single supply operational amplifier. Its design has been optimized for single supply operation with a full set of specifications at 5V. Specifications at ±15V are also provided. Single Supply Operation Input Voltage Range Extends to Ground Output Swings to Ground while Sinking Current Guaranteed Offset Voltage: 50µV Max Guaranteed Low Drift: 1.3µV/°C Max Guaranteed Offset Current: 0.5nA Max Guaranteed High Gain 5mA Load Current: 1.5 Million Min 17mA Load Current: 0.8 Million Min Guaranteed Low Supply Current: 520µA Max Supply Current can be Reduced by a Factor of 4 Low Voltage Noise, 0.1Hz to 10Hz: 0.55µVP-P Low Current Noise— Better than OP-07: 0.07pA/√Hz at 10Hz High Input Impedance: 250MΩ Min Minimum Supply Voltage: 2.7V Min The LT1006 has a low offset voltage of 20µV, drift of 0.2µV/°C, offset current of 120pA, gain of 2.5 million, common mode rejection of 114dB and power supply rejection of 126dB. Although supply current is only 340µA, a novel output stage can source or sink in excess of 20mA while retaining high voltage gain. Common mode input range includes ground to accommodate low ground-referenced inputs from strain gauges or thermocouples, and output can swing to within a few millivolts of ground. If a higher slew rate (in excess of 1V/µs) or micropower operation (supply current down to 90µA) is required, the operating currents can be modified by connecting an external optional resistor to Pin 8. U APPLICATIO S ■ ■ ■ ■ Low Power Sample-and-Hold Circuits Battery-Powered Precision Instrumentation Strain Gauge Signal Conditioners Thermocouple Amplifiers 4mA to 20mA Current Loop Transmitters Active Filters For similar single supply precision dual and quad op amps, please see the LT1013/LT1014 data sheet. For micropower dual and quad op amps, please see the LT1078/LT1079 data sheet. , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATIO LT1006 Single Supply, Micropower Sample and Hold Distribution of Input Offset Voltage 9V 20 18 360k 1/4 CD4066 360k 1/4 CD4066 16 14 S3 S4 390Ω UNITS (%) 390Ω 8 INPUT 0V TO 5V 3 – 8 A1 LT1006 + 2 1/2 CD4066 7 2 S1 6 S2 4 1/2 CD4066 SAMPLE-HOLD COMMAND HIGH = SAMPLE LOW = HOLD LT1006 • TA01 3 – A2 LT1006 + 7 6 12 10 8 6 OUTPUT 4 4 2 0.01µF ACQUISITION TIME HOLD SETTLING TIME S-H OFFSET HOLD SUPPLY CURRENT SAMPLE SUPPLY CURRENT 1kHz SAMPLE RATE CURRENT VS = 5V, 0V TA = 25°C 350 LT1006s TESTED FROM TWO RUNS J AND N PACKAGES 20µs 10µs 1mV 250µA 5.0mA 800µA 0 –80 40 80 –40 0 INPUT OFFSET VOLTAGE (µV) LT1006 • G01 1006fa 1 LT1006 W W W AXI U U ABSOLUTE RATI GS (Note 1) Supply Voltage ...................................................... ±22V Input Voltage ............... Equal to Positive Supply Voltage Input Voltage ............ 5V Below Negative Supply Voltage Differential Input Voltage ......................................... 30V Output Short-Circuit Duration .......................... Indefinite Operating Temperature Range LT1006AM/LT1006M (OBSOLETE)....– 55°C to 125°C LT1006AC/LT1006C/LT1006S8 ............... 0°C to 70°C Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C U U W PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER TOP VIEW ISY SET (NOTE 3) VOS 1 TRIM –IN 2 8 7 V+ – + +IN 3 4 V– (CASE) 6 OUT LT1006AMH LT1006MH LT1006ACH LT1006CH 5 VOS TRIM (NOTE 4) TOP VIEW VOS 1 TRIM –IN 2 – + +IN 3 7 ISY SET (NOTE 3) V+ 6 OUT 5 VOS TRIM (NOTE 4) 8 V– 4 N8 PACKAGE 8-LEAD PDIP S8 PACKAGE 8-LEAD PLASTIC SO ORDER PART NUMBER LT1006CN8 LT1006S8 S8 PART MARKING 1006 TJMAX = 100°C, θJA = 130°C/W (N8) TJMAX = 150°C, θJA = 200°C/W (S8) LT1006AMJ8 LT1006MJ8 LT1006ACJ8 LT1006CJ8 J8 PACKAGE 8-LEAD CERDIP TJMAX = 100°C, θJA = 130°C/W H PACKAGE 8-LEAD TO-5 METAL CAN TJMAX = 150°C, θJA = 150°C, θJC = 45°C OBSOLETE PACKAGES Consider the N8 or S8 Package for Alternate Source Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER VOS Input Offset Voltage CONDITIONS VS = 5V, VCM = 0V, VOUT = 1.4V, TA = 25°C, unless otherwise noted. MIN LT1006AM/AC TYP MAX 20 MIN 50 30 80 LT1006S8 ∆VOS ∆Time Long-Term Input Offset Voltage Stability IOS Input Offset Current IB Input Bias Current en Input Noise Voltage 0.1Hz to 10Hz Input Noise Voltage Density fO = 10Hz fO = 1000Hz Input Noise Current Density fO = 10Hz Input Resistance Differential Mode Common Mode (Note 2) in 0.4 80 400 0.5 0.7 LT1006S8 UNITS µV µV µV/Mo µV/Mo 0.12 0.5 0.15 0.9 nA 9 15 10 25 nA 0.55 23 22 0.55 32 25 23 22 0.07 180 LT1006M/C TYP MAX 400 5 100 µVP-P 32 25 nV/√Hz nV/√Hz 0.08 pA/√Hz 300 4 MΩ GΩ 1006fa 2 LT1006 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER VS = 5V, VCM = 0V, VOUT = 1.4V, TA = 25°C, unless otherwise noted. CONDITIONS MIN Input Voltage Range LT1006AM/AC TYP MAX MIN LT1006M/C TYP MAX UNITS 3.5 0 3.8 – 0.3 3.5 0 3.8 – 0.3 V V CMRR Common Mode Rejection Ratio VCM = 0V to 3.5V 100 114 97 112 dB PSRR Power Supply Rejection Ratio VS = ±2V to ±18V, VO = 0V 106 126 103 124 dB AVOL Large-Signal Voltage Gain VO = 0.03V to 4V, RL = 10k VO = 0.03V to 3.5V, RL = 2k 1.0 0.5 2.5 2.0 0.7 0.3 2.0 1.8 V/µV V/µV Maximum Output Voltage Swing Output Low, No Load Output Low, 600Ω to GND Output Low, ISINK = 1mA Output High, No Load Output High, 600Ω to GND 4.0 3.4 15 5 220 4.4 4.0 4.0 3.4 15 5 220 4.4 4.0 0.25 0.4 0.25 0.4 SR Slew Rate IS Supply Current RSET = ∞ RSET = 180k Pin 8 to Pin 7 (Note 3) Minimum Supply Voltage 340 90 25 10 350 520 2.7 350 90 25 10 350 mV mV mV V V V/µs 570 2.7 µA µA V The ● denotes the specifications which apply over the full operating temperature range. VS = 5V, 0V; VCM = 0.1V; VO = 1.4V; –55°C ≤ TA ≤ 125°C, unless otherwise noted. LT1006AM TYP MAX ● 40 Input Offset Voltage Drift ● IOS Input Offset Current IB Input Bias Current AVOL Large-Signal Voltage Gain VO = 0.05V to 3.5V, RL = 2k ● 0.25 0.8 0.15 0.7 V/µV CMRR Common Mode Rejection Ratio VCM = 0.1V to 3.2V ● 90 103 87 102 dB PSRR Power Supply Rejection Ratio VS = ±2V to ±18V, VO = 0V ● 100 117 97 116 dB Maximum Output Voltage Swing Output Low, 600Ω to GND Output High, 600Ω to GND ● ● 6 3.8 15 3.1 6 3.8 18 3.2 mV V 380 630 400 680 µA SYMBOL PARAMETER VOS Input Offset Voltage ∆VOS ∆Temp IS Supply Current LT1006M TYP MAX UNITS 180 60 250 µV 0.2 1.3 0.3 1.8 µV/°C ● 0.4 2.0 0.5 4.0 nA ● 13 25 16 40 nA CONDITIONS MIN ● MIN 1006fa 3 LT1006 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range. VS = 5V, 0V; VCM = 0V; VO = 1.4V; 0°C ≤ TA ≤ 70°C, unless otherwise noted. LT1006AC TYP MAX ● ● ● 30 ● ● ● Input Offset Current IB Input Bias Current AVOL Large-Signal Voltage Gain VO = 0.04V to 3.5V, RL = 2k ● 0.35 1.3 0.25 1.2 V/µV CMRR Common Mode Rejection Ratio VCM = 0V to 3.4V ● 96 109 92 108 dB PSRR Power Supply Rejection Ratio VS = ±2V to ±18V, VO = 0V ● 101 120 97 118 dB Maximum Output Voltage Swing Output Low, 600Ω to GND Output High, 600Ω to GND ● ● 6 3.9 13 3.2 6 3.9 13 3.3 mV V 350 570 360 620 µA LT1006M/C TYP MAX UNITS SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage J8/H Package N8 Package S8 Package ∆VOS ∆Temp Input Offset Voltage Drift J8/H Package N8 Package S8 Package IOS IS Supply Current LT1006C TYP MAX UNITS 110 45 50 110 160 190 560 µV µV µV 0.2 1.3 0.3 0.5 0.7 1.8 2.5 3.5 µV/°C µV/°C µV/°C ● 0.25 1.2 0.3 2.5 nA ● 11 20 12 30 nA MIN ● MIN VS = ±15V, TA = 25°C, unless otherwise noted. SYMBOL PARAMETER VOS Input Offset Voltage CONDITIONS MIN LT1006AM/AC TYP MAX MIN 30 100 50 100 180 525 µV µV LT1006S8 IOS Input Offset Current 0.1 0.5 0.15 0.9 nA IB Input Bias Current 7.5 12.0 8 20 nA Input Voltage Range 13.5 –15.0 13.8 –15.3 13.5 –15.0 13.8 –15.3 V V CMRR Common Mode Rejection Ratio VCM = +13.5V, –15V 100 117 97 116 dB PSRR Power Supply Rejection Ratio VS = ±2V to ±18V, VO = 0V 106 126 103 124 dB AVOL Large Signal Voltage Gain VO = ±10V, RL = 2k VO = ±10V, RL = 600Ω 1.5 0.8 5.0 1.5 1.2 0.5 4.0 1.0 V/µV V/µV VOUT Maximum Output Voltage Swing RL = 2k ±13 ±14 ±12.5 ±14 V SR Slew Rate RSET = ∞ RSET = 390Ω Pin 8 to Pin 4 0.25 1.0 0.4 1.2 0.25 1.0 0.4 1.2 V/µs V/µs IS Supply Current 360 540 360 600 µA 1006fa 4 LT1006 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range. VS = ±15V, –55°C ≤ TA ≤ 125°C, unless otherwise noted. LT1006AM TYP MAX ● 80 Input Offset Voltage Drift ● IOS Input Offset Current IB Input Bias Current AVOL Large-Signal Voltage Gain VO = ±10V, RL = 2k ● 0.5 1.5 0.25 1.0 V/µV CMRR Common Mode Rejection Ratio VCM = +13V, –14.9V ● 97 114 94 113 dB PSRR Power Supply Rejection Ratio VS = ±2V to ±18V, VO = 0V ● 100 117 97 116 dB Maximum Output Voltage Swing RL = 2k ● ±12 ±13.8 ±11.5 ±13.8 V SYMBOL PARAMETER VOS Input Offset Voltage ∆VOS ∆Temp IS LT1006M TYP MAX UNITS 320 110 460 µV 0.5 2.2 0.6 2.8 µV/°C ● 0.2 2.0 0.3 3.0 nA ● 9 18 11 27 nA CONDITIONS Supply Current MIN 400 ● MIN 650 400 750 µA The ● denotes the specifications which apply over the full operating temperature range. VS = ±15V, 0°C ≤ TA ≤ 70°C, unless otherwise noted. LT1006AC TYP MAX ● ● ● 50 ● ● ● Input Offset Current IB Input Bias Current AVOL Large-Signal Voltage Gain VO = ±10V, RL = 2k ● 1 3 0.7 2.5 V/µV CMRR Common Mode Rejection Ratio VCM = 13V, –15V ● 98 116 94 114 dB PSRR Power Supply Rejection Ratio VS = ±2V to ±18V, VO = 0V ● 101 120 97 118 dB Maximum Output Voltage Swing RL = 2k ● ±12.5 ±13.9 ±11.5 ±13.8 V SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage J8/H Package N8 Package S8 Package ∆VOS ∆Temp Input Offset Voltage Drift J8/H Package N8 Package S8 Package IOS IS Supply Current Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: This parameter is guaranteed by design and is not tested. Note 3: Regular operation does not require an external resistor. In order to program the supply current for low power or high speed operation, connect an external resistor from Pin 8 to Pin 7 or from Pin 8 to Pin 4, respectively. Supply current specifications (for RSET = 180k) do not include current in RSET. LT1006C TYP MAX UNITS 200 75 80 150 300 330 730 µV µV µV 0.5 2.2 0.6 0.7 1.0 2.8 3.5 4.5 µV/°C µV/°C µV/°C ● 0.15 1 0.25 2 nA ● 8 15 10 23 nA MIN ● 370 600 MIN 380 660 µA Note 4: Optional offset nulling is accomplished with a potentiometer connected between the trim terminals and the wiper to V–. A 10k pot (providing a null range of ±6mV) is recommended for minimum drift of nulled offset voltage with temperature. For increased trim resolution and accuracy, two fixed resistors can be used in conjunction with a smaller potentiometer. For example, two 4.7k resistors tied to Pins 1 and 5, with a 500Ω pot in the middle, will have a null range of ±150µV. 1006fa 5 LT1006 U W TYPICAL PERFOR A CE CHARACTERISTICS Offset Voltage Drift with Temperature of Representative Units Offset Voltage vs Balanced Source Resistor 150 10 30 0 –30 –60 –90 RS 1.0 RS + 0.1 1k 125 0 2 T = 25°C 2 T = 125°C 1 POSITIVE VOS 2 NEGATIVE VOS 1.0 0 0.4 0.8 COMMON MODE INPUT VOLTAGE (V) Voltage Gain vs Load Resistance with VS = ±15V 10M 10M TA = 25°C TA = –55°C VOLTAGE GAIN (V/V) VOLTAGE GAIN (V/V) 1.4 LT1006 • G04 VS = 5V, 0V TA = 25°C 1.0 1 T = 25°C –100 Voltage Gain vs Load Resistance, VS = 5V, 0V 1.5 1 T = 125°C 100 LT1006 • G03 Warm-Up Drift TA = 25°C 1M TA = 125°C 0.5 TA = –55°C TA = 125°C 1M LT1006 METAL CAN (H) PACKAGE LT1006 CERDIP (J) PACKAGE 0 2 3 1 TIME AFTER POWER ON (MIN) 0 100k 100 4 1k LOAD RESISTANCE TO GROUND (Ω) INPUT OFFSET CURRENT (nA) VS = 5V, 0V 9 VS = ±15V 3 0 –50 –25 50 25 75 0 TEMPERATURE (˚C) 100 125 LT1006 • G08 0.4 0.3 0.2 0.1 0 –50 –25 VS = 5V, 0V VS = ±15V 50 25 0 75 TEMPERATURE (°C) 100 125 LT1006 • G09 5 15 4 10 3 5 2 0 1 –5 VS = 5V, 0V, T = 125°C 0 VS = ±15V, T = 25°C –1 0 VS = 5V, 0V, T = 25°C –18 –6 –12 INPUT BIAS CURRENT (nA) –10 –15 –24 COMMON MODE INPUT VOLTAGE, VS = 15V (V) VCM = 0V 12 6 Input Bias Current vs Common Mode Voltage 0.5 VCM = 0V 10k LT1006 • G07 Input Offset Current vs Temperature Input Bias Current vs Temperature 15 1k LOAD RESISTANCE TO GROUND (Ω) LT1006 • G06 LT1006 • G05 18 100k 100 10k COMMON MODE INPUT VOLTAGE, VS = 5V, 0V (V) CHANGE IN OFFSET VOLTAGE (µV) 200 –300 –0.4 3k 10k 30k 100k 300k 1M 3M 10M BALANCED SOURCE RESISTANCE, RS (Ω) LT1006 • G02 2.0 300 –200 VS = ±15V, 25°C VS = 5V, 0V, 25°C 0.01 100 – VS = ±15V, –55°C TO 125°C –120 50 25 0 75 TEMPERATURE (°C) 400 OFFSET VOLTAGE (µV) INPUT OFFSET VOLTAGE (µV) 60 –150 –50 –25 VS = 5V, 0V VS = 5V, 0V, –55°C TO 125°C 90 OFFSET VOLTAGE (µV) 500 VS = 5V, 0V VCM = 0.1V 120 INPUT BIAS CURRENT (nA) VOS vs Common Mode Voltage vs Temperature LT1006 • G10 1006fa 6 LT1006 U W TYPICAL PERFOR A CE CHARACTERISTICS Noise Spectrum 1000 NUMBER OF UNITS 80 VOLTAGE NOISE DENSITY (nV/√Hz) CURRENT NOISE DENSITY (fA/√Hz) VS = ±2.5V TA = 25°C 200 UNITS TESTED FROM THREE RUNS 60 40 20 0.1Hz to 10Hz Noise TA = 25°C VS = ±2V TO ±18V VS = ±2V TO ±15V TA = 25°C NOISE VOLTAGE (100nV/DIV) 10Hz Voltage Noise Distribution 100 300 100 CURRENT NOISE VOLTAGE NOISE 30 1/f CORNER 2Hz 10 0 16 28 24 20 VOLTAGE NOISE DENSITY (nV/√Hz) 10 100 FREQUENCY (Hz) 1 32 1k 0 4 6 TIME (SEC) Supply Current vs Temperature Increasing Slew Rate (RSET to V –) 1000 10 1 100 0.1 SLEW RATE (V/µs) SUPPLY CURRENT (µA) SUPPLY CURRENT (µA) VS = 5V, 0V ISY* SUPPLY CURRENT (mA) 350 SR SLEW RATE (V/µs) VS = ±15V 10 VS = ±15V OR VS = 5V, 0V VS = 5V, 0V 450 10 LT1006 • G13 Reducing Power Dissipation 400 8 LT1006 • G12 LT1006 • G11 500 2 ISY 1 1 SR 300 250 –50 –25 50 25 0 75 TEMPERATURE (°C) 100 125 LT1006 • G14 PIN 8 IS APPROXIMATELY 60mV ABOVE THE NEGATIVE SUPPLY 10 10 5 1 50 CURRENT INJECTED INTO PIN 8 (µA) 0.01 0.5 0.1 100 PIN 8 IS APPROXIMATELY 60mV ABOVE THE NEGATIVE SUPPLY 1k RSET, PIN 8 TO PIN 4 (Ω) *ISY DOES NOT INCLUDE CURRENT THROUGH RSET 0.1 10k LT1006 • G16 LT1006 • G15 5 V + = 5V TO 30V V – = 0V MAXIMUM OUTPUT VOLTAGE (V) SATURATION VOLTAGE (V) 10 Maximum Output Swing vs Load Resistor ISINK = 10mA 1.0 ISINK = 5mA ISINK = 1mA 0.1 ISINK = 100µA ISINK = 10µA Common Mode Rejection Ratio vs Frequency 120 VS = 5V, 0V 4 COMMON MODE REJECTION RATIO (dB) Output Saturation vs Sink Current vs Temperature TA = 125°C TA = 25°C 3 TA = – 55°C 2 1 ISINK = 0 0.01 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) LT1006 • G17 0 0.01 0.1 1 LOAD RESISTOR (kΩ) 10 LT1006 • G18 TA = 25°C 100 VS = 5V, 0V 80 VS = ±15V 60 40 20 0 10 100 1k 10k FREQUENCY (Hz) 100k 1M LT1006 • G19 1006fa 7 LT1006 U W TYPICAL PERFOR A CE CHARACTERISTICS Voltage Gain vs Frequency TA = 25°C VCM = 0V CL = 10pF 20 PHASE VOLTAGE GAIN (dB) 100 80 60 VS = 5V, 0V VS = ±15V 40 100 120 ±15V 10 140 ±15V GAIN 160 5V, 0V 0 5V, 0V 180 200 20 0 –10 –20 0.01 0.1 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) 0.1 0.3 3 1 FREQUENCY (MHz) LT1006 • G20 4V 4V 2V 2V 0V 0V 1006 G23 NEGATIVE SUPPLY 80 POSITIVE SUPPLY 60 40 20 VS = ±15V + 1Vp-p SINE WAVE TA = 25°C 0 0.1 10 1 10 100 1k 10k FREQUENCY (Hz) 100k 1M LT1006 • G22 Large-Signal Transient Response, VS = 5V, 0V AV = 1 RL = 4.7k TO 5V INPUT = 0V TO 3.8V 100 LT1006 • G21 Large Transient Response, VS = 5V, 0V 10µs/DIV 120 POWER SUPPLY REJECTION RATIO (dB) 120 VOLTAGE GAIN (dB) 80 TA = 25°C CL = 10pF PHASE SHIFT (DEGREES) 140 Power Supply Rejection Ratio vs Frequency Gain, Phase vs Frequency Large-Signal Transient Response, VS = ±15V 5V/DIV 10µs/DIV AV = 1 RL = 4.7k TO GROUND INPUT = 0V TO 3.8V 50µs/DIV 1006 G24 1006 G25 AV = 1 Small-Signal Transient Response, VS = 5V, 0V Small-Signal Transient Response, VCC = ± 2.5V to ±15V 100mV 20mV/DIV 0V 20µs/DIV AV = 1 CL = 10pF RL = 600Ω TO GND INPUT = 0V TO 100mV PULSE 2µs/DIV 1006 G26 1006 G27 AV = 1 CL = 10pF 1006fa 8 LT1006 U W U U APPLICATIO S I FOR ATIO The LT1006 is fully specified for single supply operation, (i.e., when the negative supply is 0V). Input common mode range includes ground; the output swings within a few millivolts of ground. Single supply operation, however, can create special difficulties, both at the input and at the output. The LT1006 has specific circuitry which addresses these problems. At the input, the driving signal can fall below 0V— inadvertently or on a transient basis. If the input is more than a few hundred millivolts below ground, two distinct problems can occur on previous single supply designs, such as the LM124, LM158, OP-20, OP-21, OP-220, OP-221, OP-420: a) When the input is more than a diode drop below ground, unlimited current will flow from the substrate (V– terminal) to the input. This can destroy the unit. On the LT1006, the 400Ω resistors, in series with the input (see Schematic Diagram), protect the devices even when the input is 5V below ground. b) When the input is more than 400mV below ground (at 25°C), the input stage saturates (transistors Q3 and Q4) and phase reversal occurs at the output. This can cause lock-up in servo systems. Due to a unique phase reversal protection circuitry (Q21, Q22, Q27, Q28), the LT1006’s output does not reverse, as illustrated below, even when the inputs are at –1.5V. At the output, the aforementioned single supply designs either cannot swing to within 600mV of ground (OP-20) or cannot sink more than a few microamperes while swinging to ground (LM124, LM158). The LT1006’s all-NPN output stage maintains its low output resistance and high gain characteristics until the output is saturated. In dual supply operations, the output stage is crossover distortion free. Since the output cannot go exactly to ground, but can only approach ground to within a few millivolts, care should be exercised to ensure that the output is not saturated. For example, a 1mV input signal will cause the amplifier to set up in its linear region in the gain 100 configuration shown below, but is not enough to make the amplifier function properly in the voltage follower mode. Voltage Follower with Input Exceeding the Negative Common Mode Range (VS = 5V, 0V) 4V 4V 4V 2V 2V 2V 0V 0V 0V 6VP-P INPUT, –1.5V TO 4.5V R LT1006 NO PHASE REVERSAL 1006 TA11b Gain 100 Amplifier Voltage Follower 5V 5V 99R – LT1006 1mV LM324, LM358, OP-20, OP-21 EXHIBIT OUTPUT PHASE REVERSAL 1006 TA11a + – 600Ω LT1006 • TA02 OUTPUT SATURATED ≈ 5mV LT1006 100mV 1mV + 1006 TA11c 600Ω LT1006 • TA03 1006fa 9 LT1006 U W U U APPLICATIO S I FOR ATIO In automated production testing the output is forced to 1.4V by the test loop; offset voltage is measured with a common mode voltage of zero and the negative supply at zero (Pin 4). Without the test loop, these exact conditions cannot be achieved. The test circuit shown ensures that the output will never saturate even with worst-case offset voltages (– 250µV over the – 55°C to 125°C range). The effective common mode input is 0.3V with respect to the negative supply. As indicated by the common mode rejection specifications the difference is only a few microvolts between the two methods of offset voltage measurement. Test Circuit for Offset Voltage and Offset Drift with Temperature 50k* 4.7V – V0 LT1006 100Ω + 50k* – 0.3V *RESISTORS MUST HAVE LOW THERMOELECTRIC POTENTIAL. **THIS CIRCUIT IS ALSO USED AS THE BURN-IN CONFIGURATION, WITH SUPPLY VOLTAGES INCREASED TO ± 20V VO = 1000VOS LT1006 • TA04 Low Supply Operation The minimum guaranteed supply voltage for proper operation of the LT1006 is 2.7V. Typical supply current at this voltage is 320µA; therefore, power dissipation is only 860µW. Noise Testing For application information on noise testing and calculations, please see the LT1007 or LT1028 data sheet. Supply Current Programming Connecting an optional external resistor to Pin 8 changes the biasing of the LT1006 in order to increase its speed or to decrease its power consumption. If a higher slew rate is required, connect the external resistor for Pin 8 to Pin 4 [see performance curves for Increasing Slew Rate (RSET to V–)]. For lower power consumption, inject a current into Pin 8 (which is approximately 60mV above V–) as shown on the Reducing Power Dissipation plot. This can be accomplished by connecting RSET to the positive supply, or to save additional power, by obtaining the injected current from a low voltage battery. Comparator Applications The single supply operation of the LT1006 and its ability to swing close to ground while sinking current lends itself to use as a precision comparator with TTL compatible output. Comparator Rise Response Time to 10mV, 5mV, 2mV Overdrives Comparator Fall Response Time to 10mV, 5mV, 2mV Overdrives 4 4 OUTPUT (V) OUTPUT (V) 2 0 2 0 0 0 INPUT (mV) INPUT (mV) –100 –100 0 VS = 5V, 0V 50µs/DIV 1006 TA12a VS = 5V, 0V 50µs/DIV 1006 TA12b 1006fa 10 LT1006 U TYPICAL APPLICATIO S Platinum RTD Signal Conditioner with Curvature Correction Voltage Controlled Current Source with Ground Referred Input and Output +V V = 5.6V TO 10V 5V INPUT 3 7 + 0V TO 2V LT1006 2 – 4 39k 1µF LM334 1.21k* IK = 100µA 1N457 12k* 5k 400°C TRIM 43.2k** 0.68µF 5V +V 10k* 1k 50k 5°C TRIM 1k** 4 180k 1k** 7 – 8 8 + RP 1k @ 0°C 7 0.02V TO 4V OUT = 2°C TO 400°C ±0.25°C LT1006 1k** 6 11 4 1µF 1µF 100Ω 12 1.21M* 1µF RP = ROSEMOUNT 118MF ** = TRW MAR-6 0.1% * = 1% METAL FILM 14 13 1/2 LTC1043 17 VIN 100Ω 16 0.001µF LT1006 • TA05 IOUT = OPERATES FROM A SINGLE 5V SUPPLY LT1006 • TA06 Micropower 1MHz V/F Converter 9V LM334 2k* VOLTAGE CONTROLLED CURRENT SOURCE 9V 3.1k* 200k* INPUT 0V TO 5V 100Hz TRIM 220k** TYP A1 LT1006 2k – 120k** 20k TYP 1MHz TRIM 2µF * = 1% METAL FILM ** = 1% METAL FILM, SELECTED 8 NC 12k 47k + 10µF Q8 2N3906 1 14 0.01µF 3pF Q3 REFERENCE Q7 4 0.33µF Q5 = 2N3904 + 470k 7 Q2 Q1 TRIGGER 1N4148 12 74C90 11 14 ÷100 STRAY CAPACITANCE 1 12 74C90 11 Q4 LT1004-2.5 LT1004-1.2 OUTPUT 0MHz TO 1MHz 1000pF (POLYSTYRENE) REFERENCE SWITCH Q6 CHARGE PUMP 0.12% LINEARITY 280µA QUIESCENT CURRENT 680µA AT 1MHz LT1006 • TA07 = 74C14 1006fa 11 LT1006 U TYPICAL APPLICATIO S Micropower Thermocouple Signal Conditioner with Cold Junction Compensation 4.5V (3AA CELLS) 100k R4 233k* R3 RT R1 1684* CATALYST RESEARCH CORP MODEL 2736 2.8V LT1034 1.2V 56k + R2 186* 7 8 0V TO 3V OUT = 0°C TO 60°C ±0.75°C LT1006 1.8k* – TYPE J THERMOCOUPLE 4 5.76M* TOTAL POWER CONSUMPTION ≤ 500µW * = TRW MAR-6 0.1% RT = YELLOW SPRINGS INST. CO MODEL 44007 5k AT 25°C 5.98k* LT1006 • TA08 Linear Thermometer 5V 5V 10k 5% 16.2k 4 1k 0°C 1/2 LTC1043 7 LT1004 1.235V 3 + 8 2 107k – 6 0V TO 1.000V = 0°C TO 100.0°C ±0.25°C 4 51.1k 11 1µF 3.2k 7 LT1006 1µF 500Ω 100°C 12 T1 100k 6250Ω 13 16 0.001µF 14 17 T1 = YELLOW SPRINGS #44201 ALL RESISTORS = TRW MAR-6 0.1% UNLESS NOTED LT1006 • TA09 1006fa 12 LT1006 U TYPICAL APPLICATIO S ±5V Precision Instrumentation Amplifier 5V 4 5V + 7 3 8 2 – VOUT 4 –5V C2 1µF C1 1µF (EXTERNAL) 1 LT1006 11 DIFFERENTIAL INPUT 8 + 1µF 12 R1 13 R2 14 16 CMRR > 120dB AT DC CMRR > 120dB AT 60Hz DUAL SUPPLY OR SINGLE 5V GAIN = 1 + R2/R1 VOS ≈ 150µV 1/2 LTC1043 0.01µF 17 –5V ∆VOS ≈ 2µV/°C ∆T COMMON MODE INPUT VOLTAGE INCLUDES THE SUPPLIES LT1006 • TA10 W W SCHE ATIC DIAGRA V+ 7 9k 9k 1.6k Q5 Q6 1.6k Q13 1.6k 100Ω Q16 1k Q14 Q36 Q15 Q32 Q30 Q35 Q4 Q3 Q28 3.9k Q22 3 –IN Q2 Q1 Q33 21pF Q37 Q26 2.5pF +IN V– J1 Q25 Q27 600Ω Q38 2.4k 18Ω Q21 6 OUTPUT 400Ω Q39 Q40 Q41 28k 2 400Ω Q18 Q12 Q29 4pF Q7 V 75pF Q42 Q19 Q34 8 100pF 2.7k 2.7k – Q43 2k Q8 Q11 Q9 Q31 Q10 1 TRIM 2k 5 TRIM 15pF 2k Q17 Q23 Q24 Q20 2k 1.3k 2k Q44 30Ω 84k 5.4k 2.5k 4 LT1006 • SD01 1006fa 13 LT1006 U PACKAGE DESCRIPTIO H Package 8-Lead TO-5 Metal Can (.200 Inch PCD) (Reference LTC DWG # 05-08-1320) .335 – .370 (8.509 – 9.398) DIA .305 – .335 (7.747 – 8.509) .040 (1.016) MAX .050 (1.270) MAX SEATING PLANE .165 – .185 (4.191 – 4.699) GAUGE PLANE .010 – .045* (0.254 – 1.143) REFERENCE PLANE .500 – .750 (12.700 – 19.050) .016 – .021** (0.406 – 0.533) .027 – .045 (0.686 – 1.143) PIN 1 45°TYP .028 – .034 (0.711 – 0.864) .200 (5.080) TYP .110 – .160 (2.794 – 4.064) INSULATING STANDOFF *LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE AND THE SEATING PLANE .016 – .024 **FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS (0.406 – 0.610) H8(TO-5) 0.200 PCD 0801 J8 Package 8-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) CORNER LEADS OPTION (4 PLCS) .023 – .045 (0.584 – 1.143) HALF LEAD OPTION .045 – .068 (1.143 – 1.650) FULL LEAD OPTION .005 (0.127) MIN .405 (10.287) MAX 8 7 6 5 .025 (0.635) RAD TYP .220 – .310 (5.588 – 7.874) 1 2 3 .300 BSC (7.62 BSC) 4 .200 (5.080) MAX .015 – .060 (0.381 – 1.524) .008 – .018 (0.203 – 0.457) 0° – 15° NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS .045 – .065 (1.143 – 1.651) .014 – .026 (0.360 – 0.660) .100 (2.54) BSC .125 3.175 MIN J8 0801 OBSOLETE PACKAGES 1006fa 14 LT1006 U PACKAGE DESCRIPTIO N8 Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) .400* (10.160) MAX 8 7 6 5 1 2 3 4 .255 ± .015* (6.477 ± 0.381) .300 – .325 (7.620 – 8.255) .008 – .015 (0.203 – 0.381) +.035 .325 –.015 ( 8.255 +0.889 –0.381 ) .045 – .065 (1.143 – 1.651) .130 ± .005 (3.302 ± 0.127) .065 (1.651) TYP .100 (2.54) BSC .120 (3.048) .020 MIN (0.508) MIN .018 ± .003 (0.457 ± 0.076) N8 1002 NOTE: 1. DIMENSIONS ARE INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) 1006fa 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. 15 LT1006 U PACKAGE DESCRIPTIO S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .189 – .197 (4.801 – 5.004) NOTE 3 .045 ±.005 .050 BSC 8 7 6 5 N N .245 MIN .160 ±.005 1 .030 ±.005 TYP .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) 2 3 N/2 N/2 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 1 .053 – .069 (1.346 – 1.752) 0°– 8° TYP .016 – .050 (0.406 – 1.270) NOTE: 1. DIMENSIONS IN .014 – .019 (0.355 – 0.483) TYP INCHES (MILLIMETERS) 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) 2 3 4 .004 – .010 (0.101 – 0.254) .050 (1.270) BSC SO8 0502 1006fa 16 Linear Technology Corporation LT/TP 1102 1K REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 1988