My Inquiry
My Account
Texas Instruments OPA837IDCKT
- Part No.:
- OPA837IDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA837IDCKT.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:199
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA837IDCKT from Texas Instruments is a single-channel, unity-gain stable, voltage-feedback operational amplifier optimized for precision, low-power SAR ADC driving. It delivers 105 MHz small-signal bandwidth at 1 V/V gain, 600 µA quiescent current, ±130 µV max input offset voltage, and rail-to-rail output swing on 2.7–5.4 V single supply - enabling high-fidelity signal conditioning in battery-powered data acquisition systems.
For engineers reviewing the OPA837IDCKT datasheet, OPA837IDCKT pinout, OPA837IDCKT application, or OPA837IDCKT equivalent, key selection criteria include its true ground-input capability, 4.7 nV/√Hz input voltage noise at >100 Hz, 35 ns settling time to 0.1%, and fast 300 ns turn-on from shutdown - all critical for 12- to 16-bit SAR ADC front-end design.
Technical Context
The OPA837IDCKT employs a voltage-feedback architecture with negative rail input and rail-to-rail output stage, supporting true ground-referenced input signals and full 0–5 V output swing on 5 V supply. Its 50 MHz gain-bandwidth product ensures low dynamic output impedance up to high frequencies, essential for charging SAR ADC sampling capacitors without settling error.
It integrates a dedicated power-down pin (PD) that reduces quiescent current to ≤5 µA while maintaining fast 300 ns wake-up latency and 100 ns turn-off delay - enabling precise power scaling in duty-cycled sensor interfaces and wearable devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 105 MHz at G = 1 V/V - enables wideband signal amplification without phase loss in high-speed data converters. |
| Quiescent supply current | 600 µA per channel - supports ultra-low-power operation in coin-cell or energy-harvesting systems. |
| Input offset voltage (max) | ±130 µV at 25°C - minimizes DC error in precision sensor buffering and reference drive applications. |
| Input voltage noise | 4.7 nV/√Hz (>100 Hz) - preserves SNR in low-amplitude analog front-ends such as transimpedance or current-sense amplifiers. |
| Settling time to 0.1% | 35 ns for 0.5-V step - meets timing budgets of 1 MSPS+ SAR ADCs requiring sub-cycle amplifier stabilization. |
| Power-down current | ≤5 µA - allows aggressive power gating without compromising wake-up responsiveness in intermittent measurement systems. |
| Input offset drift (DCK) | < ±1.6 µV/°C - ensures stable DC performance across –40°C to +125°C industrial temperature range. |
Pinout & Package
The OPA837IDCKT is housed in a 5-pin SC70 package (2.00 mm × 1.25 mm body), optimized for space-constrained PCB layouts while maintaining thermal performance (RθJA = 203°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT | Output | Amplifier output node; rail-to-rail capable, drives SAR ADC input capacitance directly. |
| 2 - VS− | Negative supply | Ground reference for single-supply operation; supports true ground-input common-mode range. |
| 3 - VIN+ | Noninverting input | High-impedance input (180 kΩ || 0.5 pF); accepts DC-coupled sensor or reference signals down to ground. |
| 4 - VIN− | Inverting input | Differential input node; used in inverting configurations or feedback networks with precision resistors. |
| 5 - PD | Power-down control | CMOS-compatible digital input; driven high for normal operation, low for ≤5 µA shutdown mode. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stability | Guaranteed stable at G = 1 V/V without external compensation - simplifies layout and eliminates risk of oscillation in buffer configurations. |
| Negative rail input | Common-mode input range extends to VS− (ground) - enables direct interfacing with ground-referenced sensors and DAC outputs. |
| Rail-to-rail output | Swings within 100 mV of supply rails at 2 kΩ load - maximizes dynamic range when driving ADCs with 0–VCC input ranges. |
| Low-noise precision | 4.7 nV/√Hz input voltage noise + ±130 µV max offset - achieves <1 LSB error in 16-bit systems with 5 V full-scale range. |
| Fast shutdown recovery | 300 ns turn-on delay from PD high - supports microsecond-level power cycling in time-triggered measurement sequences. |
Applications
| 12-Bit to 16-Bit SAR ADC Driver | Precision ADC Reference Buffer |
|---|---|
Use Scenario: Driving the input of a 16-bit, 1 MSPS SAR ADC (e.g., ADS8860) in a portable data logger. IC Role / Device Role / Timing Role: Signal-conditioning amplifier with fast settling and low distortion to ensure accurate sampling of analog sensor outputs. Use Value: 35 ns settling time and 105 MHz bandwidth prevent aperture uncertainty and maintain ENOB >15 bits at full throughput. | Use Scenario: Buffering a precision voltage reference (e.g., REF5040) for multiple ADCs in an industrial PLC module. IC Role / Device Role / Timing Role: Low-drift, low-noise reference follower isolating the reference source from switching load transients. Use Value: ±1.6 µV/°C drift and 4.7 nV/√Hz noise preserve reference accuracy and minimize system offset drift over temperature. |
| Low-Power Transimpedance Amplifier | Wearable Device Front-End |
Use Scenario: Converting photodiode current to voltage in a battery-powered pulse oximeter. IC Role / Device Role / Timing Role: Transimpedance amplifier with low input bias current (340 nA typ.) and low noise for high-gain optical detection. Use Value: 600 µA supply current and rail-to-rail output enable >100-hour operation on a single CR2032 cell while maintaining SNR >85 dB. | Use Scenario: Conditioning ECG electrode signals in a compact, ultra-low-power wearable health monitor. IC Role / Device Role / Timing Role: Single-supply, ground-input instrumentation amplifier stage preceding digitization. Use Value: True ground-referenced input eliminates need for level-shifting circuitry, reducing BOM count and PCB area by 30%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA320SAIDBVR | Lower bandwidth (20 MHz), lower noise (7 nV/√Hz), no shutdown pin, SC70-5 package | Better DC precision but insufficient bandwidth for ≥1 MSPS SAR drivers | Select for sub-MSPS, ultra-low-offset applications where speed is secondary to long-term stability. |
| ADA4807-1ARMZ | Higher supply current (1.3 mA), higher bandwidth (180 MHz), MSOP-8 package, no shutdown | Superior speed/noise trade-off but incompatible pinout and higher power draw | Select when 180 MHz bandwidth and 3.9 nV/√Hz noise justify 2.2× higher quiescent current in non-battery systems. |
Compared with OPA320SAIDBVR and ADA4807-1ARMZ, the OPA837IDCKT uniquely balances 105 MHz bandwidth, 600 µA supply current, and integrated shutdown in a 5-pin SC70 - making it the only option meeting simultaneous requirements for 16-bit SAR ADC driving, battery life >1 year, and programmable power gating.
Availability
OPA837IDCKT is available at Aetrix Electronics and suitable for precision data acquisition, portable medical instrumentation, and low-power industrial sensing requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for OPA837IDCKT 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 is a global semiconductor leader delivering analog and embedded processing solutions, with deep expertise in precision amplifiers, data converters, and low-power signal chain ICs.
The OPA837IDCKT belongs to TI's OPAx837 family of low-power, high-speed precision op amps - designed specifically for SAR ADC driver and reference buffer roles in space- and energy-constrained systems.
FAQ
What is the maximum operating supply voltage for the OPA837IDCKT?
The OPA837IDCKT supports a single-supply operating range from 2.7 V to 5.4 V. Absolute maximum ratings specify VS+ to VS− must not exceed 5.5 V. Operation beyond 5.4 V risks parametric degradation or permanent damage, and is outside the characterized specification range defined in the datasheet.
Does the OPA837IDCKT support rail-to-rail input?
No - the OPA837IDCKT features negative rail input (common-mode range extends to VS−) but does not support rail-to-rail input. Its common-mode input range reaches up to 3.8 V at 5 V supply and 1.8 V at 3 V supply, limiting high-side headroom. The device is optimized for ground-referenced inputs, not full supply-rail coverage.
Can the OPA837IDCKT drive a 1000-pF capacitive load directly?
No - the OPA837IDCKT is not specified for direct 1000-pF capacitive loads. Its unity-gain stability is validated into resistive loads and typical ADC input capacitances (<50 pF). Driving large capacitive loads requires isolation resistance or a dedicated buffer stage to avoid peaking, overshoot, or instability per Figure 38 in the datasheet.
What is the typical input bias current of the OPA837IDCKT at 25°C?
The typical input bias current of the OPA837IDCKT at 25°C is 340 nA, with a guaranteed maximum of 520 nA across temperature. This value applies to both input terminals and remains consistent between SC70 (DCK) and SOT-23 (DBV) packages under 5 V supply conditions.
How does the power-down feature affect output behavior in the OPA837IDCKT?
When the PD pin is pulled low (≤0.55 V), the OPA837IDCKT enters shutdown mode: output becomes high-impedance (not tri-stated in the digital sense), quiescent current drops to ≤5 µA, and internal biasing is disabled. The output does not clamp or short - it floats, requiring external pull-down or termination if needed for system safety.
OPA837IDCKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 105V/µs
- Gain Bandwidth Product:
- 50 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 340 nA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 592µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.4 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
OPA837IDCKT FAQ
1.How can I place an order for OPA837IDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA837IDCKT 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 OPA837IDCKT reliable?
The price and inventory of OPA837IDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA837IDCKT is usually 5 days.
3.What payment methods are accepted for OPA837IDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA837IDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA837IDCKT?
OPA837IDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA837IDCKT 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 OPA837IDCKT?
For technical support, including OPA837IDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA837IDCKT requirements.
6.How does Aetrix verify that OPA837IDCKT is sourced from the original manufacturer or authorized distributors?
All OPA837IDCKT 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 OPA837IDCKT meets industry standards.
7.What is the process for return or replacement of OPA837IDCKT?
All OPA837IDCKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA837IDCKT, 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 OPA837IDCKT part is unused and in its original packaging.
Return procedure for OPA837IDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA837IDCKT Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
