OPA
27
OPA
27
OPA27 OPA37
SBOS135B – JANUARY 1984 – REVISED FEBRUARY 2005
Ultra-Low Noise, Precision OPERATIONAL AMPLIFIERS
FEATURES
q q q q q q q LOW NOISE: 4.5nV/√Hz max at 1kHz LOW OFFSET: 100µV max LOW DRIFT: 0.4µV/°C HIGH OPEN-LOOP GAIN: 117dB min HIGH COMMON-MODE REJECTION: 100dB min HIGH POWER-SUPPLY REJECTION: 94dB min FITS OP-07, OP-05, AD510, AND AD517 SOCKETS
DESCRIPTION
The OPA27 and OPA37 are ultra-low noise, high-precision monolithic operational amplifiers. Laser-trimmed thin-film resistors provide excellent long-term voltage offset stability and allow superior voltage offset compared to common zener-zap techniques. A unique bias current cancellation circuit allows bias and offset current specifications to be met over the full –55°C to +125°C temperature range. The OPA27 is internally compensated for unity-gain stability. The decompensated OPA37 requires a closed-loop gain ≥ 5. The Texas Instrument OPA27 and OPA37 are improved replacements for the industry-standard OP-27 and OP-37.
APPLICATIONS
q q q q q q PRECISION INSTRUMENTATION DATA ACQUISITION TEST EQUIPMENT PROFESSIONAL AUDIO EQUIPMENT TRANSDUCER AMPLIFIERS RADIATION HARD EQUIPMENT
7 +VCC
8 Trim 1 Trim
6 Output
2 –In 3 +In
4 –VCC
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright © 1984-2005, Texas Instruments Incorporated
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ABSOLUTE MAXIMUM RATINGS(1)
Supply Voltage ................................................................................... ±22V Internal Power Dissipation (2) ....................................................... 500mW Input Voltage ..................................................................................... ±VCC Output Short-Circuit Duration (3) ................................................. Indefinite Differential Input Voltage (4) ............................................................. ±0.7V Differential Input Current (4) ........................................................... ±25mA Storage Temperature Range .......................................... –55°C to +125°C Operating Temperature Range ......................................... –40°C to +85°C Lead Temperature: P (soldering, 10s) ....................................................................... +300°C U (soldering, 3s) ......................................................................... +260°C NOTES: (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. (2) Maximum package power dissipation versus ambient temperature. (2) To common with ±VCC = 15V. (4) The inputs are protected by back-to-back diodes. Current limiting resistors are not used in order to achieve low noise. If differential input voltage exceeds ±0.7V, the input current should be limited to 25mA.
ELECTROSTATIC DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
PIN CONFIGURATION
Top View
PACKAGE/ORDERING
PRODUCT OPA27 OPA27 OPA37 OPA37 PACKAGE-LEAD DIP-8 SO-8 DIP-8 SO-8
INFORMATION(1)
θJA
100°C/W 160°C/W 100°C/W 160°C/W PACKAGE DRAWING P D P D PACKAGE MARKING OPA27GP OPA27U OPA37GP OPA37U
Offset Trim –In +In –VCC 1 2 3 4 8 7 6 5 Offset Trim +VCC Output NC
NOTE: (1) For the most current package and ordering information, see the Package Option Addendum located at the end of this document, or see the TI website at www.ti.com.
NC = No Connection
2
OPA27, OPA37
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SBOS135B
ELECTRICAL CHARACTERISTICS
At VCC = ±15V and TA = +25°C, unless otherwise noted. OPA27 OPA37 PARAMETER INPUT NOISE (6) Voltage, fO = 10Hz fO = 30Hz fO = 1kHz fB = 0.1Hz to 10Hz Current,(1) fO = 10Hz fO = 30Hz fO = 1kHz OFFSET VOLTAGE (2) Input Offset Voltage Average Drift (3) Long Term Stability (4) Supply Rejection BIAS CURRENT Input Bias Current OFFSET CURRENT Input Offset Current IMPEDANCE Common-Mode VOLTAGE RANGE Common-Mode Input Range Common-Mode Rejection OPEN-LOOP VOLTAGE GAIN, DC FREQUENCY RESPONSE Gain-Bandwidth Product (5) Slew Rate (5) ±11 100 117 CONDITIONS MIN TYP 3.8 3.3 3.2 0.09 1.7 1.0 0.4 ±25 ±0.4 0.4 94 120 ±1 ±15 10 2 || 2.5 ±12.3 122 124 124 8 63 MAX 8.0 5.6 4.5 0.25 UNITS nV/√Hz nV/√Hz nV/√Hz µVPP pA/√Hz pA/√Hz pA/√Hz µV µV/°C µV/mo dB µV/V nA nA GΩ || pF V dB dB dB MHz MHz
0.6 ±100 ±1.8 (6) 2.0
TA MIN to TA MAX ±VCC = 4 to 18V ±VCC = 4 to 18V
±20 ±80 75
VIN = ±11VDC RL ≥ 2kΩ RL ≥ 1kΩ OPA27 OPA37 VO = ±10V, RL = 2kΩ OPA27, G = +1 OPA37, G = +5 OPA27, G = +1 OPA37, G = +5 RL ≥ 2kΩ RL ≥ 600Ω DC, Open Loop RL = 0Ω
5 (6) 45 (6)
1.7 (6) 11(6)
Settling Time, 0.01% RATED OUTPUT Voltage Output Output Resistance Short Circuit Current POWER SUPPLY Rated Voltage Voltage Range, Derated Performance Current, Quiescent TEMPERATURE RANGE Specification Operating
1.9 11.9 25 25 ±13.8 ±12.8 70 25 ±15
V/µs V/µs µs µs V V Ω mA VDC ±22 5.7 +85 +85 VDC mA °C °C
±12 ±10
60(6)
±4 IO = 0mADC –40 –40 3.3
NOTES: (1) Measured with industry-standard noise test circuit (Figures 1 and 2). Due to errors introduced by this method, these current noise specifications should be used for comparison purposes only. (2) Offset voltage specification are measured with automatic test equipment after approximately 0.5 seconds from power turnon. (3) Unnulled or nulled with 8kΩ to 20kΩ potentiometer. (4) Long-term voltage offset vs time trend line does not include warm-up drift. (5) Typical specification only on plastic package units. Slew rate varies on all units due to differing test methods. Minimum specification applies to open-loop test. (6) This parameter specified by design.
OPA27, OPA37
SBOS135B
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3
ELECTRICAL CHARACTERISTICS
At VCC = ±15V and –40°C ≤ TA ≤ +85°C, unless otherwise noted. OPA27 OPA37 PARAMETER INPUT VOLTAGE (1) Input Offset Voltage Average Drift (2) Supply Rejection BIAS CURRENT Input Bias Current OFFSET CURRENT Input Offset Current VOLTAGE RANGE Common-Mode Input Range Common-Mode Rejection OPEN-LOOP GAIN, DC Open-Loop Voltage Gain RATED OUTPUT Voltage Output Short Circuit Current TEMPERATURE RANGE Specification ±10.5 (3) 96 (3) 113 (3) ±11.0 (3) CONDITIONS MIN TYP ±48 ±0.4 90 (3) 122 ±21 20 ±11.8 122 120 ±13.4 25 +85 ±150 (3) 135 (3) MAX ±220(3) ±1.8 (3) UNITS µV µV/°C dB nA nA V dB dB V mA °C
TA MIN to TA MAX ±VCC = 4.5 to 18V ±VCC = 4.5 to 18V
VIN = ±11VDC RL ≥ 2kΩ RL = 2kΩ VO = 0VDC
–40
NOTES: (1) Offset voltage specification are measured with automatic test equipment after approximately 0.5s from power turn-on. (2) Unnulled or nulled with 8kΩ to 20kΩ potentiometer. (3) This parameter specified by design.
4
OPA27, OPA37
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SBOS135B
TYPICAL PERFORMANCE CURVES
At TA = +25°C, ±VCC = ±15VDC, unless otherwise noted.
INPUT OFFSET VOLTAGE WARM-UP DRIFT +10
Offset Voltage Change (µV)
10
INPUT VOLTAGE NOISE vs NOISE BANDWIDTH (0.1Hz to Indicated Frequency)
Voltage Noise (µVrms)
+5
1
0
0.1 RS = 0 Ω
–5
–10 0 1 2 3 4 5 6 Time From Power Turn-On (min)
0.01 100 1k 10k 100k Noise Bandwidth (Hz)
TOTAL INPUT VOLTAGE NOISE SPECTRAL DENSITY vs SOURCE RESISTANCE 100 80 60
Voltage Noise (nV/√Hz)
VOLTAGE NOISE SPECTRAL DENSITY vs SUPPLY VOLTAGE 5
R1
Voltage Noise (nV/√Hz)
40 20 10 8 6 4 2 1 100 R1
+ RSOURCE = 2 x R 1 10Hz 1kHz Resistor Noise Only
4
10Hz
3
1kHz
2
1
1k Source Resistance (Ω) 10k
0
±5
±10 Supply Voltage (VCC )
±15
±20
VOLTAGE NOISE SPECTRAL DENSITY vs TEMPERATURE 5 10Hz
Voltage Noise (nV/√Hz)
INPUT CURRENT NOISE SPECTRAL DENSITY 10 8 6 4 2 500kΩ 1 0.8 0.6 0.4 0.2 In = √(e n )2 – (130nV)2
o
Current Noise Test Circuit 100kΩ 500kΩ 10kΩ
DUT
4
Current Noise (pA/√Hz)
en
o
3
1kHz
1M Ω x 100 Warning: This industry-standard equation is inaccurate and these figures should be used for comparison purposes only! 10 100 Frequency (Hz) 1k 10k
2
1 –75 –50 –25 0 +25 +50 +75 +100 +125 Ambient Temperature (°C)
0.1
OPA27, OPA37
SBOS135B
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5
TYPICAL PERFORMANCE CURVES (Cont.)
At TA = +25°C, ±VCC = ±15VDC, unless otherwise noted.
INPUT VOLTAGE NOISE SPECTRAL DENSITY 10
140 120
Voltage Gain (dB)
OPEN-LOOP FREQUENCY RESPONSE
Voltage Noise (nV/√Hz)
8
100 OPA37 80 60 40 20 OPA27
6
4
2
0 1 10 Frequency (Hz) 100 1k
0 10 100 1k 10k 100k 1M 10M 100M Frequency (Hz)
BIAS AND OFFSET CURRENT vs TEMPERATURE 20
Absolute Bias Current (nA)
OPA27 CLOSED-LOOP VOLTAGE GAIN AND PHASE SHIFT vs FREQUENCY (G = 100)
20
Absolute Offset Current (nA)
50 40 0 –45 ∅ 20 10 0 –10 –20 10 100 1k 10k 100k 1M 10M 100M Frequency (Hz) Gain –90 –135 –180 –225
Bias 15 Offset 10 10 15
5
5
0 –75 –50 –25 0 +25 +50 +75 +100 Ambient Temperature (°C)
0 +125
OPA37 CLOSED-LOOP VOLTAGE GAIN AND PHASE SHIFT vs FREQUENCY (G = 100) 50
140
Voltage Gain (dB)
30
COMMON-MODE REJECTION vs FREQUENCY
Voltage Gain (dB)
30 Ø 20 10 0 –10 –20 10 100 1k 10k 100k 1M 10M G=5 Gain
–45 –90 –135 –180 –225
Common-Mode Rejection (dB)
40
0
Phase Shift (degrees)
120 100 80 60 40 20 0 OPA27 OPA37
100M
1
10
100
1k
10k
100k
1M
10M
Frequency (Hz)
Frequency (Hz)
6
OPA27, OPA37
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SBOS135B
Phase Shift (degrees)
TYPICAL PERFORMANCE CURVES (Cont.)
At TA = +25°C, ±VCC = ±15VDC, unless otherwise noted.
POWER SUPPLY REJECTION vs FREQUENCY 140
OPEN-LOOP VOLTAGE GAIN vs SUPPLY VOLTAGE 130
Power Supply Rejection (dB)
120 100
OPA27
R L = 2k Ω
Voltage Gain (dB)
–VCC 80 60 40 20 0 1 10 100 1k 10k 100k 1M 10M Frequency (Hz) +VCC
125 R L = 600 Ω
120
115 ±5 ±10 ±15 Supply Voltage (VCC ) ±20 ±25
OPEN-LOOP VOLTAGE GAIN vs TEMPERATURE 135 6 5
SUPPLY CURRENT vs SUPPLY VOLTAGE
Supply Current (mA)
Voltage Gain (dB)
130
4 3 2 1
+125°C +25°C –55°C
125
RL = 2kΩ
120
115 –75 –50 –25 0 +25 +50 +75 +100 +125 Ambient Temperature (°C)
0 0 ±5 ±10 Supply Voltage (VCC ) ±15 ±20
COMMON-MODE INPUT VOLTAGE RANGE vs SUPPLY VOLTAGE +15 +10 +5 0 –5 –10 –15 0 ±5 ±10 Supply Voltage (VCC ) ±15 ±20
+60 +40
OPA27 SMALL SIGNAL TRANSIENT RESPONSE
Common-Mode Range (V)
T A = +25°C TA = +125°C TA = –55°C TA = +25°C TA = +125°C
Output Voltage (mV)
T A = –55°C
+20 0 –20 –40 –60 0 0.5 1 Time (µs) 1.5 2 2.5
A VCL = +1 C L = 15pF
OPA27, OPA37
SBOS135B
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7
TYPICAL PERFORMANCE CURVES (Cont.)
At TA = +25°C, ±VCC = ±15VDC, unless otherwise noted.
OPA37 SMALL SIGNAL TRANSIENT RESPONSE +60 +40 +6 +4
OPA27 LARGE SIGNAL TRANSIENT RESPONSE
Output Voltage (mV)
+20 0 –20 –40 –60 0 0.2 0.4 0.6 Time (µs) 0.8 1.0 1.2
Output Voltage (V)
+2 0 –2 A VCL = +1 –4 –6 0 2 4 6 Time (µs) 8 10 12
A V = +5 C L = 25pF
OPA37 LARGE SIGNAL TRANSIENT RESPONSE +15 +10
Output Voltage (V)
+5 0 –5 A V = +5 –10 –15 0 1 2 3 Time (µs) 4 5 6
8
OPA27, OPA37
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SBOS135B
APPLICATIONS INFORMATION
OFFSET VOLTAGE ADJUSTMENT
The OPA27 and OPA37 offset voltages are laser-trimmed and require no further trim for most applications. Offset voltage drift will not be degraded when the input offset is nulled with a 10kΩ trim potentiometer. Other potentiometer values from 1kΩ to 1MΩ can be used, but VOS drift will be degraded by an additional 0.1µV/°C to 0.2µV/°C. Nulling large system offsets by use of the offset trim adjust will degrade drift performance by approximately 3.3µV/°C per millivolt of offset. Large system offsets can be nulled without drift degradation by input summing. The conventional offset voltage trim circuit is shown in Figure 3. For trimming very small offsets, the higher resolution circuit shown in Figure 4 is recommended. The OPA27 and OPA37 can replace 741-type operational amplifiers by removing or modifying the trim circuit.
THERMOELECTRIC POTENTIALS
The OPA27 and OPA37 are laser-trimmed to microvolt-level input offset voltages, and for very-low input offset voltage drift. Careful layout and circuit design techniques are necessary to prevent offset and drift errors from external thermoelectric potentials. Dissimilar metal junctions can generate small EMFs if care is not taken to eliminate either their sources (lead-to-PC, wiring, etc.) or their temperature difference (see Figure 11). Short, direct mounting of the OPA27 and OPA37 with close spacing of the input pins is highly recommended. Poor layout can result in circuit drifts and offsets which are an order of magnitude greater than the operational amplifier alone.
0.1µF
100kΩ 10Ω 2kΩ DUT 4.7µF Voltage Gain Total = 50,000 OPA111 2.2µF 100kΩ 0.1µF 24.3kΩ Scope x1 RIN = 1MΩ 110kΩ 4.3kΩ 22µF
NOTE: All capacitor values are for nonpolarized capacitors only.
FIGURE 1. 0.1Hz to 10Hz Noise Test Circuit.
0.1Hz TO 10Hz NOISE 1s/div 40nv/div
FIGURE 2. Low Frequency Noise.
OPA27, OPA37
SBOS135B
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9
NOISE: BIPOLAR VERSUS FET
Low-noise circuit design requires careful analysis of all noise sources. External noise sources can dominate in many cases, so consider the effect of source resistance on overall operational amplifier noise performance. At low source impedances, the lower voltage noise of a bipolar operational amplifier is superior, but at higher impedances the high current noise of a bipolar amplifier becomes a serious liability. Above about 15kΩ, the OPA111 low-noise FET operational amplifier is recommended for lower total noise than the OPA27, as shown in Figure 5.
COMPENSATION
Although internally compensated for unity-gain stability, the OPA27 may require a small capacitor in parallel with a feedback resistor (RF) which is greater than 2kΩ. This capacitor will compensate the pole generated by RF and CIN and eliminate peaking or oscillation.
INPUT PROTECTION
Back-to-back diodes are used for input protection on the OPA27 and OPA37. Exceeding a few hundred millivolts differential input signal will cause current to flow, and without external current limiting resistors, the input will be destroyed. Accidental static discharge, as well as high current, can damage the amplifier’s input circuit. Although the unit may still be functional, important parameters such as input offset voltage, drift, and noise may be permanently damaged, as will any precision operational amplifier subjected to this abuse. Transient conditions can cause feedthrough due to the amplifier’s finite slew rate. When using the OPA27 as a unity-gain buffer (follower) a feedback resistor of 1kΩ is recommended, as shown in Figure 6.
+VCC
(1)
7 2 8 1 OPA27/37 3 4 –VCC 6
NOTE: (1) 10kΩ to 1MΩ Trim Potentiometer (10kΩ Recommended).
±4mV Typical Trim Range
FIGURE 3. Offset Voltage Trim.
+VCC
RF ≈ 1kΩ
–
(1)
NOTE: (1) 1kΩ Trim Potentiometer. 4.7kΩ 1
Input
+
OPA27
Output 1.9V/µs
7 2
4.7kΩ 8
OPA27/37 3
6
FIGURE 6. Pulsed Operation.
4 –VCC
±280µV Typical Trim Range
FIGURE 4. High Resolution Offset Voltage Trim.
G ≈ 40dB at 1kHz. Metal film resistors. Film capacitors. RL and CL per cartridge manufacturer’s recommendations. 100Ω
7.87kΩ 0.01µF 0.03µF
97.6kΩ 2 3 OPA37 6 1µF
1k
Voltage Noise Spectral Density, EO Typical at 1kHz (nV/√Hz)
Output
OPA27 + Resistor EO RS OPA111 + Resistor OPA111 + Resistor
100
Moving Magnet Cartridge
20kΩ RL CL
Resistor Noise Only
10 Resistor Noise Only 1 100 OPA27 + Resistor 1k 10k 100k 1M 10M
FIGURE 7. Low-Noise RIAA Preamplifier.
1kΩ 1kΩ Input 2 3
EO = √en2 + (inRS)2 + 4kTRS FO = 1kHz
Source Resistance, RS (Ω)
OPA27
6
Output
FIGURE 5. Voltage Noise Spectral Density Versus Source Resistance.
FIGURE 8. Unity-Gain Inverting Amplifier.
10
OPA27, OPA37
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SBOS135B
1kΩ 1kΩ Input 250Ω 500pF
G ≈ 50dB at 1kHz. Metal film resistors. Film capacitors. RL and CL per head manufacturer’s recommendations. 100Ω
4.99kΩ
0.01µF
316kΩ
2 3 OPA37 6 Output
2 3 OPA37 6
1µF
Output
RL
CL
20kΩ
Magnetic Tape Head
FIGURE 9. High Slew Rate Unity-Gain Inverting Amplifier.
FIGURE 10. NAB Tape Head Preamplifier.
10kΩ Total Gain = 106 10Ω DUT Offset G =1k 10Hz LowPass Filter Chart Recorder 10mV/mm 5mm/s
A. 741 noise with circuit well-shielded from air currents and RFI. (Note scale change.)
5µV
B. OP-07AH with circuit well-shielded from air currents and RFI.
0.5µV
C. OPA27AJ with circuit well-shielded from air currents and RFI. (Represents ultimate OPA27 performance potential.)
0.5µV
D. OPA27 with circuit unshielded and exposed to normal lab bench-top air currents. (External thermoelectric potentials far exceed OPA27 noise.)
0.5µV
E. OPA27 with heat sink and shield which protects input leads from air currents. Conditions same as (D).
0.5µV
FIGURE 11. Low Frequency Noise Comparison.
OPA27, OPA37
SBOS135B
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11
–In
3 2 OPA37 6
Gain = 100 Bandwidth ≈ 500kHz
For Gain = 1000, use INA106 differential amplifier. INA105 Differential Amplifier 2 25kΩ 25kΩ 5
RF 5kΩ
RG 101Ω
Input Stage Gain = 1 + 2RF /RG RF 5kΩ 3 25kΩ 6 Output
2 3 OPA37 6 1
25kΩ
+In
FIGURE 12. Low Noise Instrumentation Amplifier.
0.1µF
1kΩ
100Ω
200Ω 2 500pF 3 OPA37 6 0.1µF Output
100kΩ
2 3 OPA27 6 Output
2kΩ 1MΩ
EDO 6166 Transducer
Dexter 1M Thermopile Detector
Frequency Response ≈ 1kHz to 50kHz
NOTE: Use metal film resistors and plastic film capacitor. Circuit must be well shielded to achieve low noise.
Responsivity ≈ 2.5 x 104V/W Output Noise ≈ 30µVrms, 0.1Hz to 10Hz
FIGURE 13. Hydrophone Preamplifier.
FIGURE 14. Long-Wavelength Infrared Detector Amplifier.
20pF TTL INPUT “1” “0” GAIN +1 –1
9.76kΩ Balance Trim
500Ω Input D1 D2 10kΩ 4.99kΩ S1 S2 2 3 OPA27 8 1 4.75kΩ TTL In DG188 Offset Trim 1kΩ 6
Output
4.75kΩ
+VCC
FIGURE 15. High Performance Synchronous Demodulator.
12
OPA27, OPA37
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SBOS135B
Gain = –1010V/V VOS ≈ 2µV Drift ≈ 0.07µV/°C en ≈ 1nV/√Hz at 10Hz 0.9nV/√Hz at 100Hz 0.87nV/√Hz at 1kHz Full Power Bandwidth ≈ 180kHz Gain Bandwidth ≈ 500MHz Equivalent Noise Resistance ≈ 50Ω Input 20Ω 2 3 20Ω 2 6 3 20Ω 2 3 20Ω 2 6 3 20Ω 2 6 3 OPA37 OPA37 2kΩ OPA37 2kΩ 6 OPA37 2kΩ 2 6 3 OPA37 Output 2kΩ OPA37 2kΩ 6 2kΩ Signal-to-Noise Ratio ∝ √N since amplifier noise is uncorrelated.
2kΩ
2kΩ
2kΩ
2kΩ
2kΩ
N = 10 Each OPA37
FIGURE 16. Ultra-Low Noise “N”-Stage Parallel Amplifier.
OPA27, OPA37
SBOS135B
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13
5V 5V +10V +10V Output 0V
Output
0V
–10V –10V 5µs 5µs RS = 50Ω 1kΩ RS = 50Ω 1kΩ
2 250Ω Output 500pF Input 3 OPA37 6 Output
2 3 OPA27 6
Input
FIGURE 17. Unity-Gain Buffer.
FIGURE 18. High Slew Rate Unity-Gain Buffer.
+15V
200Ω
20kΩ
10µF/20V +
100Ω
10kΩ
VIRTEC V1000 50Ω Planar Tunnel Input 0.01µF Diode
2 3 200Ω OPA37 6 Video Output
1 100µF/20V Tantalum + 10kΩ
2 3 OPA27 6 Output
2
RFC
500pF
10kΩ
Siemens LHI 948
3
FIGURE 19. RF Detector and Video Amplifier.
FIGURE 20. Balanced Pyroelectric Infrared Detector.
4.8V + 1kΩ Airpax Magnetic Pickup 2 3 OPA27 6 Output 0
– fOUT ∝ RPM • N Where N = Number of Gear Teeth
FIGURE 21. Magnetic Tachometer.
14
OPA27, OPA37
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SBOS135B
PACKAGE OPTION ADDENDUM
www.ti.com
8-Mar-2005
PACKAGING INFORMATION
Orderable Device OPA27GP OPA27GU OPA27GU/2K5 OPA37GP OPA37GU OPA37GU/2K5
(1)
Status (1) ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE
Package Type PDIP SOIC SOIC PDIP SOIC SOIC
Package Drawing P D D P D D
Pins Package Eco Plan (2) Qty 8 8 8 8 8 8 50 100 2500 50 100 2500 None None None None None None
Lead/Ball Finish Call TI CU NIPDAU CU NIPDAU Call TI CU SNPB CU SNPB
MSL Peak Temp (3) Level-NA-NA-NA Level-2-220C-1 YEAR Level-2-220C-1 YEAR Level-NA-NA-NA Level-2-220C-1 YEAR Level-2-220C-1 YEAR
The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. None: Not yet available Lead (Pb-Free). Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens, including bromine (Br) or antimony (Sb) above 0.1% of total product weight.
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 1
MECHANICAL DATA
MPDI001A – JANUARY 1995 – REVISED JUNE 1999
P (R-PDIP-T8)
0.400 (10,60) 0.355 (9,02) 8 5
PLASTIC DUAL-IN-LINE
0.260 (6,60) 0.240 (6,10)
1
4 0.070 (1,78) MAX 0.325 (8,26) 0.300 (7,62) 0.015 (0,38) 0.200 (5,08) MAX Seating Plane 0.125 (3,18) MIN 0.010 (0,25) NOM Gage Plane
0.020 (0,51) MIN
0.100 (2,54) 0.021 (0,53) 0.015 (0,38) 0.010 (0,25) M
0.430 (10,92) MAX
4040082/D 05/98 NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. Falls within JEDEC MS-001
For the latest package information, go to http://www.ti.com/sc/docs/package/pkg_info.htm
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