Analog Devices Inc. AD8610BRZ

Overview

AD8610BRZ from Analog Devices is a precision JFET-input operational amplifier optimized for photodiode amplification, high-speed instrumentation, and precision signal conditioning. It delivers 6 nV/√Hz voltage noise density, ≤100 μV max offset voltage (B-grade), 50 V/μs slew rate, and 25 MHz gain bandwidth product in an 8-lead SOIC package. Its low 10 pA max input bias current and ±13 V dual-supply operation support high-impedance sensor interfacing in medical imaging and ATE systems.

For engineers reviewing the AD8610BRZ datasheet, AD8610BRZ pinout, AD8610BRZ application, or AD8610BRZ equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and two confirmed alternative parts with documented functional trade-offs for photodiode front-ends, fast integrators, and high-fidelity audio buffering.

Technical Context

The AD8610BRZ employs Analog Devices' XFCB dielectrically isolated process with N-channel JFET input stage and thin-film resistor trimming, enabling <1 μV/°C offset drift and stable operation with >1 nF capacitive loads. Its architecture eliminates phase reversal under overvoltage conditions and supports unity-gain stability without external compensation.

It achieves 600 ns settling to 0.01% for 10 V steps at ±13 V supplies, maintains CMRR ≥90 dB across −10 V to +10 V common-mode range, and delivers ±45 mA output drive into 1 kΩ while swinging within 1.16 V of rails - critical for dynamic range preservation in ADC driver and DAC buffer roles.

Key Specifications

Pinout & Package

AD8610BRZ is housed in an 8-lead narrow SOIC (SOIC_N) package with standard JEDEC MS-012AC footprint (5.0 mm × 6.2 mm, 1.27 mm pitch). Thermal resistance θJA = 158°C/W, θJC = 43°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OPA627AP and ADA4625-1ARZ, AD8610BRZ uniquely balances 6 nV/√Hz noise, 50 V/μs slew rate, and 10 pA input bias in a single ±13 V capable device - making it the only option that satisfies simultaneous low-noise, fast-settling, and high-impedance interface requirements in medical imaging front-ends.

Availability

AD8610BRZ is available at Aetrix Electronics and suitable for photodiode amplification, ATE integrator circuits, and high-fidelity audio buffering requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD8610BRZ 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD8610BRZ belongs to Analog Devices' precision JFET op amp product line, engineered specifically for applications demanding ultralow noise, minimal input bias current, and guaranteed stability with heavy capacitive loads - such as medical imaging, test instrumentation, and high-end audio.

FAQ

What is the maximum capacitive load the AD8610BRZ can drive stably in unity-gain noninverting configuration?

The AD8610BRZ is specified to drive >1000 pF capacitively loaded in unity-gain noninverting mode without oscillation or excessive ringing. At ±5 V supply, it safely drives up to 10,000 pF; at ±13 V, stability extends beyond 1 nF. This eliminates need for series isolation resistors in ADC input buffers - a key advantage over legacy JFET op amps like the OPA627. AD8610BRZ's internal compensation ensures phase margin remains >45° even under these conditions.

Does the AD8610BRZ require external null adjustment for precision applications?

No - the AD8610BRZ (BRZ suffix) is factory-trimmed and does not require external null adjustment. Pin 8 (NULL) is provided for optional fine-tuning but is left unconnected in standard use. The B-grade version guarantees ≤100 μV max offset voltage over −40°C to +125°C without user calibration. External trimming is only necessary if sub-20 μV offset is required, in which case a 10 kΩ potentiometer between Pins 1 and 8 referenced to V− may be used.

How does the AD8610BRZ perform in photodiode transimpedance applications compared to bipolar-input op amps?

The AD8610BRZ outperforms bipolar-input op amps in photodiode applications due to its 10 pA max input bias current - 1000× lower than typical precision bipolar amps - minimizing dark current errors in high-impedance (>100 MΩ) transimpedance gains. Its 6 nV/√Hz noise density also exceeds most bipolar parts below 10 kHz. Unlike bipolar amps, AD8610BRZ maintains low bias current across −40°C to +125°C, avoiding thermal drift-induced gain errors in uncooled medical detectors.

Can the AD8610BRZ replace the OPA627 in existing designs without layout changes?

No - AD8610BRZ is not a drop-in replacement for OPA627. While both are 8-lead SOIC JFET op amps, AD8610BRZ has different pinout: Pin 1 and Pin 7 are NC (no-connect), whereas OPA627 uses all eight pins functionally. Additionally, AD8610BRZ draws 3.0 mA vs. OPA627's 7.5 mA, requiring recalculation of thermal dissipation and supply regulation. Layout changes are needed to accommodate NC pins and updated decoupling placement per AD8610BRZ's stability guidelines.

What is the guaranteed settling time specification for the AD8610BRZ at ±13 V supply?

The AD8610BRZ guarantees 600 ns settling to 0.01% for a 10 V step input under ±13 V supply conditions, as verified in Table 2 of the Rev. F datasheet. This is measured with AV = +1, RL = 1 kΩ, and CL = 20 pF. At ±5 V supply, settling time degrades to 350 ns for a 4 V step - confirming consistent high-speed performance across its full operating voltage range. This spec directly supports 1 MSPS SAR ADC driver timing budgets.