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Texas Instruments OPA2137EA/250
- Part No.:
- OPA2137EA/250
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2137EA/250.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,195
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Product details
Overview
OPA2137EA/250 from Texas Instruments (formerly Burr-Brown) is a dual FET-input operational amplifier in MSOP-8 package, designed for low-cost, low-power precision signal conditioning. It delivers 5pA input bias current, 1.5mV max input offset voltage, 1MHz gain-bandwidth, ±2.25V to ±18V dual-supply operation, and rail-to-rail input common-mode range extending to V+. It is used in photodetector amplifiers and battery-powered instrumentation where input leakage and quiescent power must be minimized.
For engineers reviewing the OPA2137EA/250 datasheet, OPA2137EA/250 pinout, OPA2137EA/250 application, or OPA2137EA/250 equivalent, key selection criteria include guaranteed 5pA IB over temperature, 220µA/channel quiescent current, MSOP-8 thermal resistance (150°C/W), input-to-V+ capability, and channel independence in dual configuration-critical for high-impedance sensor front-ends and space-constrained portable designs.
Technical Context
The OPA2137EA/250 implements a JFET-input differential pair with high-impedance, low-leakage input stage enabling precision DC-coupled amplification. Its open-loop gain of 94dB and 3.5V/µs slew rate support stable unity-gain operation while maintaining fast settling (8µs to 0.1%) under 100pF load.
Each amplifier operates fully independently-no crosstalk between channels-and features input protection diodes clamped to V+ and V–, allowing safe operation with inputs up to 0.7V beyond rails. The device avoids phase inversion even when common-mode voltage exceeds V+, unlike legacy TL06x amplifiers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | ±5pA at +25°C - enables high-impedance sensor interfacing (e.g., photodiodes, strain gages) without significant DC error. |
| Input Offset Voltage | ±1.5mV max - ensures ≤1.5mV DC error at input, critical for precision integrators and low-level signal amplification. |
| Quiescent Current | ±220µA per channel - supports battery life >1 year in 10µA-systems with dual-channel active monitoring. |
| Gain-Bandwidth Product | 1MHz - provides stable AC response up to ~100kHz at G=10, suitable for active filters and anti-aliasing stages. |
| Common-Mode Input Range | (V−) + 3V to V+ - allows direct sensing of signals referenced to positive rail (e.g., high-side current monitoring). |
| Output Voltage Swing | (V−) + 1.2V to (V+) − 1.1V - delivers ≥27Vpp swing on ±15V supplies, sufficient for industrial analog I/O interfaces. |
| Channel Separation | ≥120dB at 1kHz - prevents signal coupling between A/B channels in dual-sensor systems (e.g., differential thermopile readout). |
Pinout & Package
OPA2137EA/250 is packaged in an 8-pin MSOP (VSSOP-8, package drawing DGK), measuring 3.0mm × 3.0mm × 1.0mm with 0.5mm pitch. Thermal resistance θJA = 150°C/W enables operation at full spec without forced airflow in compact enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +In A | Non-inverting input of Amplifier A - high-impedance node (1012Ω || 2pF); requires guarding in PCB layout for <1pA leakage paths. |
| 2 | –In A | Inverting input of Amplifier A - matched to Pin 1 for CMRR optimization; sensitive to stray capacitance affecting stability. |
| 3 | Out A | Amplifier A output - capable of driving ≥1000pF directly; internal compensation ensures unity-gain stability. |
| 4 | V− | Negative supply rail - must be bypassed with ≥10nF ceramic capacitor near pin to suppress PSRR degradation above 10kHz. |
| 5 | V+ | Positive supply rail - shared by both amplifiers; decoupling required separately from V− to minimize supply-induced crosstalk. |
| 6 | –In B | Inverting input of Amplifier B - electrically isolated from Amplifier A; no interaction even during overload or short-circuit events. |
| 7 | +In B | Non-inverting input of Amplifier B - identical input structure to Pin 1; supports independent biasing for dual-sensor configurations. |
| 8 | Out B | Amplifier B output - fully independent output stage; enables simultaneous dual-channel acquisition without timing skew or loading effects. |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | 5pA input bias current enables direct connection to >1GΩ source impedances (e.g., piezoelectric sensors) without gain error. |
| Rail-to-rail input common-mode range | Operates with inputs up to V+ - eliminates level-shifting circuitry in high-side current sensing applications (e.g., 4–20mA loop monitors). |
| Independent dual-channel design | No crosstalk or interaction between amplifiers - maintains accuracy when one channel is saturated or shorted, critical for fault-tolerant systems. |
| Unity-gain stable compensation | Guaranteed stability at G=1 with ≥100pF capacitive load - simplifies filter design and eliminates need for external compensation networks. |
| Wide supply range | ±2.25V to ±18V dual or +4.5V to +36V single supply - supports operation from coin-cell (3V) to industrial (36V) rails without redesign. |
Applications
| Photodetector Amplifier | Strain Gage Instrumentation |
|---|---|
Use Scenario: Amplifying low-current output (nA–µA) from BPW34 photodiode in optical smoke detector. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1MΩ feedback resistor and 3.3pF compensation. Use Value: 5pA input bias ensures <0.5% gain error at 100nA photocurrent; 1MHz GBW supports 10kHz modulation detection. |
Use Scenario: Wheatstone bridge output conditioning in handheld torque wrench with 350Ω gages. IC Role / Device Role / Timing Role: Precision difference amplifier with 1000V/V gain and offset trimming. Use Value: 1.5mV max VOS limits zero-error to <0.15% FS; 220µA IQ extends 2xAA battery life to >18 months. |
| Battery-Powered Data Logger | Active Low-Pass Filter |
Use Scenario: Signal conditioning front-end for 16-bit ADC in solar-powered environmental sensor node. IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage for thermistor and humidity sensor outputs. Use Value: Dual configuration reduces board area vs two SOT-23 op-amps; 220µA/channel enables 10-year shelf life in sleep mode. |
Use Scenario: 2nd-order Sallen-Key low-pass filter (10kHz cutoff) in audio preamplifier input stage. IC Role / Device Role / Timing Role: Unity-gain buffer and active filter integrator with 1nF/10kΩ network. Use Value: 1MHz GBW ensures flat response to 10kHz; 3.5V/µs SR prevents slew-induced distortion on 1Vpp signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET-input operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2137U/2K5 | SO-8 package (150°C/W θJA), same electrical specs, RoHS-compliant NiPdAu finish, MSL Level-3 | Preferred for through-hole prototyping or higher-power dissipation needs (>150mW) | Select when board layout accommodates larger SO-8 footprint and thermal management requires lower junction rise. |
| TL072CDR | Higher input bias current (30pA typ), higher VOS (10mV max), 3MHz GBW, 13V/µs SR, SO-8 only | Suitable for non-precision AC-coupled audio or general-purpose gain stages where leakage is not critical | Choose only if cost is primary constraint and 5pA IB or 1.5mV VOS are not required; not drop-in due to different AC performance. |
Compared with OPA2137EA/250, the OPA2137U/2K5 offers identical precision but better thermal handling in SO-8, while TL072CDR trades FET-input advantages for lower cost and higher speed-making it viable only in less demanding, AC-focused applications.
Availability
OPA2137EA/250 is available at Aetrix Electronics and suitable for photodetector amplifiers, strain gage instrumentation, and battery-powered data loggers requiring stable component supply across extended temperature ranges (–40°C to +85°C) and long product lifecycles.
Supply support for OPA2137EA/250 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments acquired Burr-Brown in 2000 and continues its legacy of precision analog ICs, emphasizing low-noise, low-drift, and low-power performance for industrial and instrumentation markets.
The OPA2137EA/250 belongs to the MicroAmplifier™ series, engineered specifically for miniature, low-cost, high-impedance signal conditioning in space- and power-constrained applications such as portable test equipment and sensor modules.
FAQ
What is the maximum operating temperature range for the OPA2137EA/250?
The OPA2137EA/250 is specified from –40°C to +85°C for full parameter compliance. It can operate continuously from –55°C to +125°C, though certain parameters like input offset voltage drift and CMRR may degrade outside the specified range. Junction temperature must not exceed +150°C under any condition.
Does the OPA2137EA/250 require external compensation for unity-gain stability?
No, the OPA2137EA/250 is internally compensated for unity-gain stability and remains stable with capacitive loads up to 1000pF. No external compensation components are needed for G=1 configurations, including transimpedance amplifiers and voltage followers-simplifying layout and reducing BOM count.
Can the OPA2137EA/250 be used with a single +5V supply?
Yes, the OPA2137EA/250 supports single-supply operation from +4.5V to +36V. With +5V, the input common-mode range is +3V to +5V, and output swings from +1.2V to +3.9V. Input biasing (e.g., VCM = +2.5V) is required to keep signals within linear range-verified in the "Operating Voltage" section of the datasheet.
How does channel separation perform in the OPA2137EA/250 at high frequencies?
Channel separation in the OPA2137EA/250 exceeds 120dB at 1kHz and remains >60dB up to 100kHz, as confirmed by typical performance curves. This isolation is maintained because each amplifier has completely independent circuitry-no shared bias or output stages-ensuring minimal crosstalk in dual-sensor or differential measurement systems.
Is the OPA2137EA/250 pin-compatible with other dual op-amps in MSOP-8 packages?
The OPA2137EA/250 uses standard MSOP-8 pinout (Pin 1 = +In A, Pin 2 = –In A, Pin 3 = Out A, Pin 4 = V–, Pin 5 = V+, Pin 6 = –In B, Pin 7 = +In B, Pin 8 = Out B), matching industry-standard dual op-amp layouts. However, electrical compatibility depends on supply range, input structure, and drive capability-OPA2137EA/250 is not a drop-in replacement for bipolar-input or rail-to-rail-output devices.
OPA2137EA/250 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 3.5V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 220µA
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2137EA/250 FAQ
1.How can I place an order for OPA2137EA/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2137EA/250 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for OPA2137EA/250 reliable?
The price and inventory of OPA2137EA/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2137EA/250 is usually 5 days.
3.What payment methods are accepted for OPA2137EA/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2137EA/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2137EA/250?
OPA2137EA/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2137EA/250 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for OPA2137EA/250?
For technical support, including OPA2137EA/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2137EA/250 requirements.
6.How does Aetrix verify that OPA2137EA/250 is sourced from the original manufacturer or authorized distributors?
All OPA2137EA/250 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that OPA2137EA/250 meets industry standards.
7.What is the process for return or replacement of OPA2137EA/250?
All OPA2137EA/250 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2137EA/250, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The OPA2137EA/250 part is unused and in its original packaging.
Return procedure for OPA2137EA/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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