Analog Devices Inc. AD8220TRMZ-EP

Overview

AD8220TRMZ-EP from Analog Devices is a JFET-input instrumentation amplifier in an 8-lead MSOP package, delivering rail-to-rail output swing, 25 pA max input bias current, 92 dB min CMRR at 60 Hz (G = 10), and operation across −55°C to +125°C for precision medical and transducer signal conditioning.

For engineers reviewing the AD8220TRMZ-EP datasheet, AD8220TRMZ-EP pinout, AD8220TRMZ-EP application, or AD8220TRMZ-EP equivalent, this enhanced product supports single-supply (4.5 V to 36 V) and dual-supply (±2.25 V to ±18 V) operation, gain setting via external resistor (G = 1 to 1000), and reference-pin-based output offset control - critical for low-noise, high-CMRR data acquisition in aerospace and industrial systems.

Technical Context

The AD8220TRMZ-EP employs a three-op-amp architecture with JFET inputs to achieve ultra-low input bias current (25 pA typ) while maintaining 1.5 MHz bandwidth at G = 1 and 14 nV/√Hz input voltage noise at 1 kHz. Its rail-to-rail output stage operates down to 0.15 V from rails under 5 V supply.

CMRR is gain-dependent and frequency-sensitive: minimum 92 dB at DC–60 Hz for G ≥ 10, dropping to 72 dB at 5 kHz for G = 1. Input common-mode range extends 0.1 V below −VS, enabling true single-supply sensor interfacing without level-shifting circuitry.

Key Specifications

Pinout & Package

AD8220TRMZ-EP is housed in an 8-lead MSOP (RM-8) package per JEDEC MO-187-AA, measuring 3.00 mm × 3.00 mm × 1.10 mm, with 0.65 mm pitch and coplanarity ≤0.10 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8421ARMZ-EP and INA128UA, AD8220TRMZ-EP uniquely balances ultra-low input bias current, rail-to-rail output, single/dual supply support, and AQEC-qualified extended temperature operation - making it the only option meeting all four criteria simultaneously for high-reliability embedded instrumentation.

Availability

AD8220TRMZ-EP is available at Aetrix Electronics and suitable for medical instrumentation, aerospace sensor interfaces, and precision data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD8220TRMZ-EP 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, serving industrial, automotive, communications, and healthcare markets since 1965.

The AD8220TRMZ-EP belongs to Analog Devices' Enhanced Product line, designed specifically for defense, aerospace, and high-reliability industrial applications requiring extended temperature operation, controlled manufacturing, and AQEC compliance.

FAQ

What is the maximum supply voltage rating for AD8220TRMZ-EP?

The AD8220TRMZ-EP has an absolute maximum supply voltage rating of ±18 V for dual supply or 36 V for single supply, as specified in Table 3 of the Rev. A datasheet. Operation beyond these limits risks permanent damage. For reliable long-term use, Analog Devices recommends staying within the operational range of ±2.25 V to ±18 V (dual) or 4.5 V to 36 V (single), with derating applied above 85°C ambient.

Does AD8220TRMZ-EP support true single-supply operation with input signals referenced to ground?

Yes, AD8220TRMZ-EP supports true single-supply operation: its input common-mode range extends to −VS − 0.1 V, allowing the negative input (−IN) to accept signals slightly below ground when −VS = 0 V. This enables direct interfacing with grounded-sensor configurations such as bridge transducers without level-shifting circuitry - confirmed in Figure 8 and Table 1 footnote 3 of the datasheet.

How is gain set on AD8220TRMZ-EP, and what is the gain error at G = 100?

Gain on AD8220TRMZ-EP is set externally using a single resistor (RG) connected between Pins 2 and 3, following G = 1 + (49.4 kΩ/RG). At G = 100, the datasheet specifies a gain error of −0.8% to +0.8% (Table 1), corresponding to ±0.8% deviation from ideal gain - critical for calibrated measurement systems where end-point accuracy must remain within 0.1% after system calibration.

What is the purpose of the REF pin on AD8220TRMZ-EP, and what drive capability does it require?

The REF pin on AD8220TRMZ-EP provides a user-adjustable output DC offset, enabling alignment with downstream ADC reference levels. It presents a 40 kΩ input resistance and draws up to 70 µA (Table 1), requiring a low-impedance source (e.g., op-amp buffer or precision voltage reference) to avoid gain and offset errors. Driving REF with a 2.5 V reference on a 5 V supply centers VOUT at 2.5 V for optimal 0–5 V ADC utilization.

Is AD8220TRMZ-EP pin-compatible with standard AD8220 variants like AD8220BRMZ?

No, AD8220TRMZ-EP is not pin-compatible with commercial AD8220 variants. While both share the same MSOP-8 (RM-8) footprint and pinout, the AD8220TRMZ-EP uses enhanced product wafer fabrication, assembly/test site controls, and extended temperature qualification - resulting in different branding (Y6T), ordering codes, and traceability. Electrical pin functions match, but mechanical and reliability specifications differ per AQEC standards.