Analog Devices Inc. AD8271BRMZ

Overview

AD8271BRMZ from Analog Devices is a precision programmable-gain difference amplifier with integrated laser-trimmed resistors, configured as a high-accuracy difference amplifier (gain = ½, 1, or 2) or over 40 single-ended amplifiers (gain = −2 to +3). It delivers 15 MHz bandwidth, 30 V/μs slew rate, and 0.02% typical gain error at ±15 V supplies - used in high-fidelity ADC driver stages where input common-mode rejection and dc accuracy are critical.

For engineers reviewing the AD8271BRMZ datasheet, AD8271BRMZ pinout, AD8271BRMZ application, or AD8271BRMZ equivalent, this page provides verified functional configurations, real-world CMRR vs. temperature behavior, supply current across temperature, output swing limits at ±2.5 V to ±18 V, and validated alternative options for instrumentation-grade signal conditioning.

Technical Context

The AD8271BRMZ integrates a low-distortion op amp with seven on-die trimmed thin-film resistors (10 kΩ and 20 kΩ values), enabling precise ratio-matched feedback networks without external components. Its internal resistor topology supports both differential-to-single-ended conversion and reference-biased single-ended amplification.

It operates from ±2.5 V to ±18 V dual supplies (or unbalanced rails up to 36 V total), maintains >74 dB CMRR up to 1 kHz across all gains, and achieves <1 ppm nonlinearity at gain = 2 with 10 kΩ load - enabled by matched resistor drift ≤2 ppm/°C and offset drift ≤3 μV/°C.

Key Specifications

Pinout & Package

AD8271BRMZ is housed in a 10-lead MSOP package (3 mm × 3 mm, 0.5 mm pitch) with exposed pad for thermal enhancement. Pin assignments are validated per Analog Devices AD8271 Rev. 0 datasheet Figure 3 and Table 7.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision difference amplifier applications.

Compared with AD8270ARMZ, AD8271BRMZ offers independent reference control and single-ended flexibility at the cost of channel count; versus INA149IDR, it trades absolute CMRR for broad configuration capability - making AD8271BRMZ optimal for mixed-signal industrial I/O where programmability and integration reduce design cycle time.

Availability

AD8271BRMZ is available at Aetrix Electronics and suitable for ADC driver, instrumentation amplifier building block, level translator, sine/cosine encoder interface, and high-performance audio applications requiring stable component supply and guaranteed RoHS compliance.

Supply support for AD8271BRMZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with R&D and manufacturing facilities worldwide.

The AD8271BRMZ belongs to Analog Devices' precision amplifier product line, designed specifically for high-accuracy signal conditioning in industrial, test & measurement, and medical instrumentation where resistor matching, thermal stability, and low distortion are critical.

FAQ

What gain configurations does the AD8271BRMZ support without external resistors?

The AD8271BRMZ supports three fixed difference amplifier gains - ½, 1, and 2 - using only internal laser-trimmed resistors. It also enables over 40 single-ended amplifier configurations (gains from −2 to +3) without external components. All configurations are implemented by connecting specific combinations of its 10-pin terminals (P1–P4, N1–N3), as detailed in the AD8271BRMZ datasheet Figures 45–50. No external resistors are required for any of these modes.

Does the AD8271BRMZ support single-supply operation?

Yes, the AD8271BRMZ supports true single-supply operation down to +2.5 V (with −VS tied to ground), as confirmed in the Absolute Maximum Ratings table (±2.5 V minimum supply) and General Description section. Its input voltage range extends to −VS − 0.4 V and +VS + 0.4 V, and reference pins P3/P4 allow setting midsupply bias - enabling robust 0–5 V or 0–3.3 V signal conditioning without level-shifting circuitry.

What is the maximum capacitive load the AD8271BRMZ can drive stably?

The AD8271BRMZ remains stable with capacitive loads up to 100 pF at gain = 1 (Figure 29), and up to 470 pF at gain = 2 (Figure 30), per the datasheet's small-signal overshoot plots. For loads exceeding these values, external series resistance (e.g., 10–50 Ω) at the output is recommended to maintain phase margin. The device's internal compensation is optimized for 2 kΩ loads, and stability is verified across all gain settings from ±2.5 V to ±18 V supplies.

How does the AD8271BRMZ achieve its low gain drift specification?

The AD8271BRMZ achieves ≤2 ppm/°C gain drift through on-die laser trimming of its internal thin-film resistors (10 kΩ and 20 kΩ), ensuring tight ratio matching across temperature. This monolithic integration eliminates thermal gradients and TCR mismatches inherent in discrete resistor networks. Measured data (Figure 9) confirms typical drift of 0.5–1.7 ppm/°C over −40°C to +85°C - directly enabling high-accuracy measurements in uncalibrated industrial sensors.

Is the AD8271BRMZ pin-compatible with the AD8270ARMZ?

No, the AD8271BRMZ is not pin-compatible with the AD8270ARMZ. Although both use 10-lead MSOP packages and share identical pin counts, their pin functions differ: AD8270ARMZ dedicates pins to dual-channel outputs and shared supplies, while AD8271BRMZ allocates all 10 pins to configurable inputs/outputs for single-channel programmability. PCB layout must be redesigned to migrate between them - no mechanical or electrical drop-in replacement is possible.