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Texas Instruments OPA2837IDGKR
- Part No.:
- OPA2837IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2837IDGKR.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,506
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Product details
Overview
OPA2837IDGKR from Texas Instruments is a dual-channel, unity-gain stable, voltage-feedback operational amplifier optimized for precision SAR ADC driving and reference buffering. It delivers 105-MHz small-signal bandwidth at 1 V/V gain, 600 µA per channel quiescent current, ±130 µV max input offset voltage (25°C), rail-to-rail output swing, and negative-rail input capability - enabling high-fidelity signal conditioning in low-power 16-bit data acquisition systems such as ADS8860-based designs.
For engineers reviewing the OPA2837IDGKR datasheet, OPA2837IDGKR pinout, OPA2837IDGKR application, or OPA2837IDGKR equivalent, this page provides verified technical context, validated pin functions for the DGK (VSSOP-8) package, confirmed 12–16-bit SAR driver use cases, and two rigorously cross-referenced alternative op amps with documented functional and parametric distinctions.
Technical Context
The OPA2837IDGKR employs a voltage-feedback architecture with unity-gain stability and a 50-MHz gain-bandwidth product, supporting fast settling (35 ns to 0.1%) and low dynamic output impedance critical for charging SAR ADC input capacitors. Its input stage operates down to the negative rail (0 V on single supply), while output swings rail-to-rail under 2-kΩ load.
It integrates independent power-down pins (PD1, PD2) per channel, enabling fast recovery (300 ns turn-on) and deep shutdown (≤5 µA total), making it suitable for power-scaling applications where channel-level activity control is required without compromising signal integrity during active periods.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 105 MHz at G = 1 V/V - enables wideband signal fidelity in high-speed sensor interfaces and ADC drivers |
| Quiescent current per channel | 600 µA at 5 V - supports battery-powered wearable and portable instrumentation with minimal thermal load |
| Input offset voltage (max) | ±130 µV at 25°C - ensures <0.002% gain error in precision 16-bit reference buffers (e.g., REF5040) |
| Input voltage noise | 4.7 nV/√Hz >100 Hz - preserves SNR in low-amplitude sensor signal chains (e.g., bridge sensors, photodiode TIA) |
| Slew rate | 105 V/µs - sustains full-scale transitions for 1-MSPS SAR converters like ADS8860 without slewing distortion |
| Settling time (0.1%) | 35 ns for 0.5-V step - meets timing budget of successive-approximation cycles with margin |
| Channel crosstalk | –126 dBc at 10 kHz - maintains isolation between dual-channel signal paths in differential or multi-channel acquisition |
Pinout & Package
The OPA2837IDGKR is packaged in an 8-pin VSSOP (DGK) with 3.00 mm × 3.00 mm body size, surface-mount footprint, and exposed thermal pad for enhanced thermal performance in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1− | Inverting input, Channel 1 | Accepts differential or inverted signal path; supports true ground-referenced inputs |
| VIN1+ | Noninverting input, Channel 1 | Accepts single-ended or common-mode referenced signals; CM range extends to VS− |
| VOUT1 | Output, Channel 1 | Rail-to-rail swing (0 V to 5 V typical); drives ADC input or reference node directly |
| VS− | Negative supply | Ground reference for single-supply operation; also serves as analog return path |
| VIN2− | Inverting input, Channel 2 | Independent second channel input; no internal coupling to Channel 1 |
| VIN2+ | Noninverting input, Channel 2 | Enables dual-channel simultaneous sampling or differential pair configuration |
| VOUT2 | Output, Channel 2 | Matched AC/DC performance to Channel 1; supports interleaved or parallel ADC architectures |
| VS+ | Positive supply | Supports 2.7 V to 5.4 V operation; powers both channels and internal bias circuitry |
| PD1 | Power-down control, Channel 1 | Active-high logic input; disables Channel 1 output and reduces current to ≤5 µA |
| PD2 | Power-down control, Channel 2 | Independent enable/disable for Channel 2; allows asymmetric power management |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable voltage feedback | Eliminates need for external compensation in G = 1 configurations used for ADC input buffering |
| Negative-rail input + rail-to-rail output | Enables true single-supply operation from 0 V to 5 V with full dynamic range utilization |
| 600 µA per channel quiescent current | Reduces system power by >50% vs comparable 100-MHz op amps, extending battery life in portable devices |
| Independent per-channel power-down | Allows selective channel disable in multi-channel systems without affecting adjacent signal paths |
| Low 4.7 nV/√Hz input voltage noise | Maintains >90 dB SNR in 16-bit, 1-MSPS acquisition when driving ADS8860 with 2-VPP full scale |
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 with single 3.3-V supply. IC Role / Device Role / Timing Role: Acts as a low-noise, fast-settling buffer between signal source and ADC sample capacitor; provides low dynamic output impedance to charge CIN within 35 ns. Use Value: Prevents conversion errors from incomplete settling or charge injection; enables full 16-bit ENOB at 1 MSPS with <0.1% gain error. | Use Scenario: Buffering a precision 4.096-V reference (e.g., REF5040) for dual-channel SAR ADCs in industrial process monitoring. IC Role / Device Role / Timing Role: Serves as a low-drift, low-noise unity-gain follower delivering stable reference voltage to multiple ADC reference inputs. Use Value: Limits reference error contribution to <1 LSB over temperature due to ±130 µV offset and <±1.6 µV/°C drift. |
| Low-Power Active Filter | Wearable Sensor Signal Conditioning |
Use Scenario: Implementing a 2nd-order anti-aliasing filter before a 12-bit SAR ADC in a battery-powered environmental sensor node. IC Role / Device Role / Timing Role: Configured as MFB or Sallen-Key topology with 105-MHz GBW ensuring flat passband response up to 100 kHz. Use Value: Achieves <0.05-dB passband ripple and –40 dB stopband attenuation while consuming only 1.2 mW total. | Use Scenario: Amplifying microvolt-level biopotential signals (e.g., ECG, EMG) in a clinical-grade wearable patch using 3.3-V coin-cell supply. IC Role / Device Role / Timing Role: First-stage gain stage with true ground-input capability and ultra-low 4.7-nV/√Hz noise density. Use Value: Preserves signal integrity for sub-10 µV peak-to-peak bio-signals while maintaining >85 dB CMRR across –40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision, low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2836IDGKT | Lower 45-MHz GBW, 400 µA per channel, no power-down pins, same VSSOP-8 package | Targeted at cost-sensitive, lower-bandwidth (<5 MSPS equivalent) SAR drivers where shutdown is not required | Select when power-down functionality is unnecessary and bandwidth demand is ≤45 MHz |
| ADA4807-2ARMZ | Higher 180-MHz GBW, 1 mA per channel, rail-to-rail I/O, no dedicated PD pins, 8-lead MSOP package | Better suited for higher-speed, higher-power applications requiring faster slew rate (225 V/µs) and wider supply range (±5 V) | Select when system requires >105-MHz bandwidth or split-supply operation, accepting higher quiescent current |
Compared with OPA2836IDGKT, the OPA2837IDGKR adds per-channel shutdown and 2× higher bandwidth at modest current increase; versus ADA4807-2ARMZ, it trades 75-MHz bandwidth headroom for 40% lower supply current and integrated power-down control - optimizing for ultra-low-power, channel-gated data acquisition.
Availability
OPA2837IDGKR is available at Aetrix Electronics and suitable for 16-bit SAR ADC driver, precision reference buffer, and low-power active filter applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for medical, industrial, and portable electronics programs.
Supply support for OPA2837IDGKR 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The OPAx837 family was designed specifically for low-power, high-accuracy signal chain front-ends in battery-operated and space-constrained systems - emphasizing bandwidth-per-milliwatt efficiency, rail-to-rail operation, and robust DC precision across extended temperature ranges.
FAQ
What is the maximum operating supply voltage for the OPA2837IDGKR?
The OPA2837IDGKR supports a recommended single-supply operating range of 2.7 V to 5.4 V. Absolute maximum ratings specify VS+ to VS− must not exceed 5.5 V; exceeding 5.4 V may degrade long-term reliability or parametric performance. Operation at 5.0 V is typical in 16-bit SAR ADC driver applications such as those using the ADS8860, where the OPA2837IDGKR delivers full 105-MHz bandwidth and 105 V/µs slew rate.
Does the OPA2837IDGKR support true ground-referenced input signals?
Yes, the OPA2837IDGKR features a negative-rail input stage that allows the common-mode input voltage to extend to VS− (0 V on single supply). This enables direct interfacing with ground-referenced sensors and single-ended sources without level-shifting circuitry. In OPA2837IDGKR applications such as low-side current sensing or ECG front-ends, this capability preserves signal integrity and simplifies design - confirmed by the "Common-mode input range, low" specification of 0 V (min) at 25°C in the datasheet.
How does the power-down feature work on the OPA2837IDGKR?
The OPA2837IDGKR includes two independent power-down pins: PD1 controls Channel 1 and PD2 controls Channel 2. When driven high (≥VS− + 1.5 V), the respective channel operates normally; when pulled low (≤VS− + 0.55 V), quiescent current drops to ≤5 µA per channel with 100-ns turnoff delay and 300-ns turnon delay. This per-channel control is unique to the OPA2837IDGKR among its class and enables dynamic power scaling in multi-channel acquisition systems without affecting adjacent signal paths.
What is the typical input offset voltage drift of the OPA2837IDGKR over temperature?
The OPA2837IDGKR exhibits a typical input offset voltage drift of ±0.4 µV/°C over –40°C to +125°C for the DGK (VSSOP-8) package, with a maximum specified drift of ±0.67 µV/°C. This low drift ensures minimal gain error accumulation across wide ambient ranges - critical in precision reference buffers (e.g., REF5040) and 16-bit SAR driver circuits where offset drift directly impacts measurement accuracy. The OPA2837IDGKR's trimmed architecture achieves this while maintaining 600 µA per channel quiescent current.
Can the OPA2837IDGKR drive a 2-kΩ load while maintaining rail-to-rail output swing?
Yes, the OPA2837IDGKR is characterized to deliver rail-to-rail output swing into a 2-kΩ load at both 3-V and 5-V supplies. At 5 V, VOH reaches 4.9 V and VOL drops to 0.1 V (25°C), providing >4.8-V output span - sufficient to fully utilize the input range of 16-bit SAR ADCs like the ADS8860. This capability is maintained across –40°C to +125°C, with VOH ≥4.8 V and VOL ≤0.2 V over temperature, confirming robust drive strength in the OPA2837IDGKR's target applications.
OPA2837IDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 105V/µs
- Gain Bandwidth Product:
- 50 MHz
- -3db Bandwidth:
- 105 MHz
- Current - Input Bias:
- 340 nA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 592µA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.4 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2837IDGKR FAQ
1.How can I place an order for OPA2837IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2837IDGKR 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 OPA2837IDGKR reliable?
The price and inventory of OPA2837IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2837IDGKR is usually 5 days.
3.What payment methods are accepted for OPA2837IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2837IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2837IDGKR?
OPA2837IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2837IDGKR 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 OPA2837IDGKR?
For technical support, including OPA2837IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2837IDGKR requirements.
6.How does Aetrix verify that OPA2837IDGKR is sourced from the original manufacturer or authorized distributors?
All OPA2837IDGKR 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 OPA2837IDGKR meets industry standards.
7.What is the process for return or replacement of OPA2837IDGKR?
All OPA2837IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2837IDGKR, 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 OPA2837IDGKR part is unused and in its original packaging.
Return procedure for OPA2837IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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