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Texas Instruments OPA2137P
- Part No.:
- OPA2137P
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
OPA2137P.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:105
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Product details
Overview
OPA2137P from Texas Instruments (formerly Burr-Brown) is a dual FET-input operational amplifier in an 8-pin DIP package, designed for precision low-power analog signal conditioning. It delivers 5pA input bias current, ±1.5mV max input offset voltage, 1MHz gain-bandwidth product, and operates from ±2.25V to ±18V supplies - enabling use in battery-powered instrumentation and high-impedance sensor interfaces.
For engineers reviewing the OPA2137P datasheet, OPA2137P pinout, OPA2137P application, or OPA2137P equivalent, key selection considerations include its rail-to-rail input capability (extends to V+), 220µA/channel quiescent current, dual-channel independence for low crosstalk, and compatibility with single-supply photodetector and strain gage amplifier topologies.
Technical Context
The OPA2137P implements a JFET-input stage with complementary bipolar output, delivering high input impedance (10¹² Ω || 2pF common-mode), low noise (45nV/√Hz at 1kHz), and unity-gain stability without external compensation. Its input common-mode range extends to the positive supply rail, eliminating need for level-shifting in high-side current sensing.
Each amplifier features fully independent circuitry - ensuring no performance degradation when one channel is overdriven or shorted. The device maintains 94dB open-loop gain and 3.5V/µs slew rate across –40°C to +85°C, supporting precision integrators and active filters requiring low THD+N (0.05% at 1kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | ±5pA typical - enables direct connection to high-impedance sources like photodiodes without significant error. |
| Input Offset Voltage | ±1.5mV max - supports DC-coupled amplification of µV-level signals in strain gage bridges. |
| Gain-Bandwidth Product | 1MHz - sufficient for anti-aliasing filters up to ~100kHz and stable unity-gain buffer operation. |
| Quiescent Current | ±220µA per channel - allows dual-channel precision amplification in 3.6V coin-cell powered devices. |
| Supply Voltage Range | ±2.25V to ±18V (dual) or +4.5V to +36V (single) - accommodates industrial rails and portable battery systems. |
| Input Common-Mode Range | (V–) + 3V to V+ - permits direct sensing of signals referenced to positive supply, e.g., high-side current monitors. |
| Output Voltage Swing | (V–) + 1.2V to (V+) – 1.1V - delivers >26Vpp swing with ±15V supplies, suitable for driving 10kΩ loads. |
Pinout & Package
OPA2137P is supplied in an 8-pin plastic dual in-line package (PDIP), with 0.3-inch body width and through-hole mounting. Thermal resistance θJA is 100°C/W, supporting operation up to +85°C ambient without forced airflow.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +In A | Non-inverting input of Amplifier A - high-impedance node (10¹² Ω) for sensor or reference signal routing. |
| 2 | –In A | Inverting input of Amplifier A - accepts feedback network or summing junction connections. |
| 3 | Out A | Amplifier A output - capable of sourcing/sinking ±25mA, drives capacitive loads up to 1000pF. |
| 4 | V– | Negative power supply pin - must be bypassed with ≥10nF ceramic capacitor near the pin. |
| 5 | V+ | Positive power supply pin - shared by both amplifiers; requires local 10nF bypassing. |
| 6 | –In B | Inverting input of Amplifier B - electrically isolated from Channel A; no crosstalk coupling. |
| 7 | +In B | Non-inverting input of Amplifier B - identical input specs to Pin 1; supports independent signal paths. |
| 8 | Out B | Amplifier B output - fully independent output stage; maintains 0.6µV/V channel separation at DC. |
Key Features
| Feature | Design Value |
|---|---|
| FET input stage | 5pA input bias current enables direct interfacing with >1GΩ source impedances without gain error. |
| Rail-to-rail input (to V+) | Accepts common-mode voltages up to the positive supply - eliminates need for input biasing in single-supply high-side sensing. |
| No phase inversion | Prevents output polarity reversal during input overdrive - critical for stability in closed-loop transimpedance amplifiers. |
| Independent dual channels | Zero interaction between amplifiers ensures predictable behavior when one channel saturates or shorts. |
| Unity-gain stable | Operates without external compensation in voltage-follower, integrator, or active filter configurations. |
Applications
| Strain Gage Amplifier | Photodetector Amplifier |
|---|---|
Use Scenario: Amplifying low-level differential voltage from a Wheatstone bridge under mechanical load. IC Role / Device Role / Timing Role: Instrumentation-grade dual op amp configured as differential-input stage with matched gain-setting resistors. Use Value: ±1.5mV offset and 5pA bias current minimize zero-error drift and bridge imbalance errors in microstrain measurement. |
Use Scenario: Converting photocurrent from a BPW34 photodiode into a stable output voltage. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with 1MΩ feedback resistor and 3.3pF compensation. Use Value: 45nV/√Hz input voltage noise and 1.2fA/√Hz current noise preserve signal integrity in low-light detection. |
| Precision Integrator | Battery-Powered Instruments |
Use Scenario: Building a low-drift analog integrator for charge accumulation or waveform generation. IC Role / Device Role / Timing Role: Dual op amp used as integrator core (Channel A) and reset comparator (Channel B). Use Value: 94dB open-loop gain and <15µV/°C offset drift ensure long-term integration accuracy over temperature. |
Use Scenario: Signal conditioning in handheld multimeters or portable environmental sensors. IC Role / Device Role / Timing Role: Dual-channel front-end amplifier powering sensor excitation and signal amplification from a single 3.6V Li-ion cell. Use Value: 220µA/channel quiescent current extends battery life beyond 1000 hours while maintaining 1MHz bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual FET-input operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL072CP | Higher input bias current (30pA typ), higher noise (18nV/√Hz), wider offset range (±10mV max). | Less suitable for ultra-high-impedance photodiode or piezoelectric sensor interfaces. | Lower-cost option where 5pA bias and sub-mV offset are not required. |
| OPA2140AP | Zero-drift architecture, 12µV max offset, 0.1µV/°C drift, but higher IQ (1.5mA/channel) and cost. | Preferred for DC-critical applications like precision weigh scales or medical ECG front-ends. | Choose when long-term DC stability outweighs quiescent power constraints. |
Compared with TL072CP and OPA2140AP, the OPA2137P uniquely balances ultra-low input bias current, micropower operation, and rail-to-rail input capability - making it optimal for battery-operated, high-impedance analog front-ends where cost and power are constrained but precision remains essential.
Availability
OPA2137P is available at Aetrix Electronics and suitable for strain gage amplifiers, photodetector interfaces, and precision integrators requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for OPA2137P 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 to manufacture and support its precision analog portfolio, including the MicroAmplifier™ series.
The OPA2137P belongs to the OPA137 family of FET-input op amps, engineered for low-cost, miniature, and low-power precision analog signal conditioning in instrumentation and sensor interface applications.
FAQ
What is the maximum operating temperature range for the OPA2137P?
The OPA2137P is specified from –40°C to +85°C for operation and storage, with extended functionality up to +125°C. Its 8-pin PDIP package provides robust thermal performance (θJA = 100°C/W), allowing reliable use in industrial control enclosures without additional heatsinking. This rating applies directly to the OPA2137P part number as shipped in rail packaging.
Does the OPA2137P support single-supply operation?
Yes, the OPA2137P operates from a single supply of +4.5V to +36V. Its input common-mode range extends to the positive rail (V+), enabling true single-supply configurations such as photodiode transimpedance amplifiers or high-side current monitors without level-shifting circuitry. This capability is confirmed in the OPA2137P datasheet Section "Operating Voltage" and applies specifically to the PDIP variant.
Is the OPA2137P pin-compatible with other packages in the OPA137 family?
No - the OPA2137P (8-pin DIP) shares the same pinout as the SO-8 and MSOP-8 variants of OPA2137, but differs from the 5-pin SOT-23 OPA137 and 14-pin SOIC/ DIP OPA4137. Pin compatibility is confirmed only among OPA2137 variants (E/U/P suffixes); the OPA2137P pinout matches the standard dual op amp configuration shown in Figure 1 of the OPA137/2137/4137 datasheet.
What is the recommended power supply bypassing for the OPA2137P?
Texas Instruments specifies ≥10nF ceramic capacitors placed as close as possible to both V+ (Pin 5) and V– (Pin 4) pins of the OPA2137P. These capacitors suppress high-frequency noise and prevent oscillation, especially critical in high-gain or high-speed configurations. This requirement is explicitly stated in the "Applications Information" section of the OPA2137P datasheet and applies identically across all package variants.
Can the OPA2137P drive capacitive loads without instability?
Yes - the OPA2137P is characterized to drive up to 1000pF capacitive loads while maintaining stability, as verified in the "Capacitive Load Drive" specification (1000pF typical). This makes it suitable for driving ADC input filters or long PCB traces without requiring isolation resistors. Performance data is measured on the OPA2137P DIP package and confirmed in the "Electrical Characteristics" table.
OPA2137P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
OPA2137P FAQ
1.How can I place an order for OPA2137P through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2137P 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 OPA2137P reliable?
The price and inventory of OPA2137P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2137P is usually 5 days.
3.What payment methods are accepted for OPA2137P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2137P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2137P?
OPA2137P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2137P 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 OPA2137P?
For technical support, including OPA2137P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2137P requirements.
6.How does Aetrix verify that OPA2137P is sourced from the original manufacturer or authorized distributors?
All OPA2137P 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 OPA2137P meets industry standards.
7.What is the process for return or replacement of OPA2137P?
All OPA2137P units undergo pre-shipment inspection (PSI). If there is an issue with OPA2137P, 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 OPA2137P part is unused and in its original packaging.
Return procedure for OPA2137P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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