Texas Instruments OPA837IDCKR

Overview

OPA837IDCKR from Texas Instruments is a single-channel, voltage-feedback operational amplifier optimized as a low-power, precision SAR ADC driver with true ground-referenced input and rail-to-rail output. It delivers 105 MHz bandwidth at unity gain, 4.7 nV/√Hz input voltage noise, ±130 µV max input offset, and 600 µA quiescent current on a 5-V supply - enabling high-fidelity signal conditioning in 12- to 16-bit data acquisition systems.

For engineers reviewing the OPA837IDCKR datasheet, OPA837IDCKR pinout, OPA837IDCKR application, or OPA837IDCKR equivalent, key selection criteria include its 35 ns settling time to 0.1%, negative rail input capability, fast 300 ns power-down wake-up, and SC70-5 package suitability for space-constrained wearable and portable instrumentation designs.

Technical Context

The OPA837IDCKR employs a unity-gain-stable voltage-feedback architecture with a 50 MHz gain-bandwidth product and 105 V/µs slew rate, enabling robust driving of SAR ADC input capacitance during acquisition phase. Its input stage supports common-mode voltages down to the negative rail (0 V), while output swings within 100 mV of both rails under 2-kΩ load.

It integrates a dedicated power-down pin (PD) that reduces quiescent current to ≤5 µA with 300 ns turn-on delay and 100 ns turn-off delay - critical for dynamic power scaling in battery-operated systems. Thermal performance is characterized for the SC70-5 package with R_θJA = 203°C/W and R_θJB = 76°C/W.

Key Specifications

Pinout & Package

The OPA837IDCKR is housed in a 5-pin SC70 package (2.00 mm × 1.25 mm body size), optimized for high-density PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision op amp applications.

Compared with OPA320AIDBVR and ADA4807-1ARMZ-R7, the OPA837IDCKR uniquely balances 105-MHz bandwidth, 600-µA quiescent current, and SC70-5 packaging - making it the optimal choice for space- and power-constrained 1-MSPS SAR ADC interfaces where fast wake-up and true ground input are mandatory.

Availability

OPA837IDCKR is available at Aetrix Electronics and suitable for portable instrumentation, wearable health monitors, and industrial data acquisition systems requiring stable component supply with guaranteed long-term manufacturability.

Supply support for OPA837IDCKR 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 specializing in analog and embedded processing technologies, with decades of expertise in high-performance op amps and precision signal chain solutions.

The OPAx837 product line targets low-power, high-speed precision amplification for SAR ADC driving and reference buffering - specifically engineered for battery-operated, high-resolution measurement systems operating across –40°C to +125°C.

FAQ

What is the maximum operating temperature range for the OPA837IDCKR?

The OPA837IDCKR is fully specified over an ambient temperature range of –40°C to +125°C, with all electrical characteristics guaranteed across this interval. Its SC70-5 package thermal metrics (R_θJA = 203°C/W) support reliable operation in thermally demanding industrial and automotive-adjacent environments when properly mounted on standard FR-4 PCBs.

Does the OPA837IDCKR require external compensation for unity-gain stability?

No, the OPA837IDCKR is internally compensated for unity-gain stability. It achieves stable operation at G = 1 V/V without any external components, as confirmed by its 105-MHz small-signal bandwidth and flat frequency response up to 10 MHz in unity-gain configuration per the official SBOS673D datasheet.

Can the OPA837IDCKR drive a 1-MSPS SAR ADC like the ADS8860?

Yes, the OPA837IDCKR is explicitly designed and characterized for 12- to 16-bit SAR ADC driving, including the ADS8860. Its 35 ns settling time to 0.1%, 105 MHz bandwidth, and 0.14 Ω output impedance at 1 MHz meet the stringent dynamic requirements of 1-MSPS conversion cycles with full-scale accuracy.

What is the function of the PD pin on the OPA837IDCKR?

The PD (Power Down) pin on the OPA837IDCKR is a CMOS-compatible digital control input. When driven high (>1.5 V above VS–), the amplifier operates normally; when pulled low (≤0.55 V above VS–), quiescent current drops to ≤5 µA. The OPA837IDCKR wakes up in 300 ns and settles within specification after power-down activation.

Is the OPA837IDCKR compatible with 3.3-V supply operation?

Yes, the OPA837IDCKR operates across a 2.7-V to 5.4-V single supply range. At 3.3 V, it maintains 105 MHz bandwidth (typical), 65 V/µs slew rate, and 35 ns settling time - verified in the SBOS673D datasheet Section 6.7. Its rail-to-rail output delivers >3.2 V swing, making it ideal for 3.3-V ADC reference buffering and signal conditioning.