Analog Devices Inc. AD8212YRMZ-RL

Overview

AD8212YRMZ-RL from Analog Devices is a high common-mode voltage current shunt monitor IC designed for high-side unidirectional current sensing across shunt resistors in industrial power systems. It delivers 1000 µA/V transconductance, operates from 7 V to 65 V supply (or >500 V with external PNP), and features integrated 5 V series regulation and output current compensation. It is used in motor control, DC-DC converters, and battery monitoring where precision current feedback is required under elevated common-mode voltages.

For engineers reviewing the AD8212YRMZ-RL datasheet, AD8212YRMZ-RL pinout, AD8212YRMZ-RL application, or AD8212YRMZ-RL equivalent, key selection criteria include its 65 V native common-mode range, ±2 mV input offset voltage, 1000 kHz small-signal bandwidth at gain = 10, 8-lead MSOP package, and compatibility with external PNP transistors for >500 V operation.

Technical Context

The AD8212YRMZ-RL implements a current-output instrumentation amplifier architecture with an internal series regulator that maintains a stable 5 V differential between V+ and COM pins. Its transconductance stage drives IOUT proportional to VSENSE, enabling precise conversion of shunt voltage to current without loading the sense node.

In normal operation (7–65 V), bias current remains stable at ~185 µA; in high-voltage mode (>65 V), it scales with (V+ − 5 V)/R_BIAS, requiring external resistor selection per Figure 21. The patented ALPHA-pin compensation circuit mirrors external PNP base current to cancel output error, preserving accuracy independent of transistor β or temperature.

Key Specifications

Pinout & Package

AD8212YRMZ-RL is housed in an 8-lead MSOP (RM-8) package compliant with JEDEC MO-187-AA, measuring 3.00 mm × 3.00 mm × 1.10 mm, with 0.65 mm pitch and exposed pad for thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side current sensing applications.

Compared with INA240A1QDRQ1 and MAX4080TASA+, the AD8212YRMZ-RL uniquely combines current output, integrated 5 V regulation, and patented ALPHA compensation - making it the only option capable of accurate >500 V sensing with low-cost PNP transistors while maintaining ±1% gain error and −40°C to +125°C operation.

Availability

AD8212YRMZ-RL is available at Aetrix Electronics and suitable for motor control, DC-DC converter monitoring, and battery management systems requiring stable component supply across automotive, industrial, and telecom power applications.

Supply support for AD8212YRMZ-RL 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 AD8212YRMZ-RL belongs to Analog Devices' precision current sensing portfolio, engineered specifically for robust high-side shunt monitoring in harsh environments where wide common-mode range, temperature stability, and reliability are mandatory.

FAQ

What is the maximum common-mode voltage supported by the AD8212YRMZ-RL without external components?

The AD8212YRMZ-RL supports a native common-mode voltage range of 7 V to 65 V when operated in normal mode with no external pass transistor. This rating is defined by the internal process breakdown limit and is verified across the full −40°C to +125°C temperature range. Operation beyond 65 V requires connection of an external PNP transistor to the ALPHA and IOUT pins, as detailed in the "High Voltage Operation" section of the datasheet.

How does the ALPHA pin function in the AD8212YRMZ-RL?

The ALPHA pin (Pin 6) of the AD8212YRMZ-RL accepts the base current of an external PNP transistor used in high-voltage configurations. Internally, this current is mirrored into a compensation circuit that adjusts the output stage to cancel base current loss - ensuring IOUT remains precisely proportional to VSENSE. This patented feature allows the AD8212YRMZ-RL to maintain ±1% gain accuracy even with low-β PNP transistors at >500 V common-mode.

Can the AD8212YRMZ-RL be used for bidirectional current sensing?

No, the AD8212YRMZ-RL is a unidirectional current sensing device optimized for high-side positive current flow only. Its architecture produces output current only in one direction (sinking), and it lacks rail-to-rail input capability or dual-supply support needed for negative differential inputs. For bidirectional applications, two AD8212YRMZ-RL devices must be used in complementary configuration - one sensing charge current and the other sensing discharge current - as shown in Figure 27 of the datasheet.

What is the purpose of the integrated 5 V series regulator in the AD8212YRMZ-RL?

The integrated 5 V series regulator in the AD8212YRMZ-RL establishes a stable 4.80 V to 5.20 V reference between the V+ and COM pins, powering all internal circuitry independently of supply fluctuations. This eliminates the need for an external LDO, improves PSRR (80 dB), and ensures consistent performance across the 7–65 V supply range - especially critical in noisy industrial power rails where V+ may contain ripple or transients.

What package type and footprint does the AD8212YRMZ-RL use?

The AD8212YRMZ-RL uses an 8-lead Mini Small Outline Package (MSOP) designated RM-8, compliant with JEDEC MO-187-AA. Its dimensions are 3.00 mm × 3.00 mm × 1.10 mm with 0.65 mm lead pitch and coplanarity ≤0.10 mm. The package includes an exposed thermal pad (not electrically connected) and pin 1 identifier - compatible with standard reflow profiles and automated assembly processes.