Analog Devices Inc. AD8222HACPZ-R7

Overview

AD8222HACPZ-R7 from Analog Devices is a dual-channel, precision instrumentation amplifier in a 4 mm × 4 mm LFCSP package, delivering 126 dB minimum CMRR at G = 100, 8 nV/√Hz input voltage noise at 1 kHz, and 60 µV max input offset voltage (B grade). It operates from ±2.3 V to ±18 V supplies, draws ≤2.2 mA total quiescent current, and targets high-accuracy signal conditioning in multichannel medical and industrial sensor systems.

For engineers reviewing the AD8222HACPZ-R7 datasheet, AD8222HACPZ-R7 pinout, AD8222HACPZ-R7 application, or AD8222HACPZ-R7 equivalent, key selection criteria include guaranteed CMRR over frequency (≥80 dB to 4 kHz), RTI noise performance (0.25 µV p-p, 0.1 Hz–10 Hz), gain-setting resistor flexibility (G = 1 to 10,000), and dual-channel density advantage in space-constrained PCB layouts.

Technical Context

The AD8222HACPZ-R7 implements a classic three-op-amp architecture with current-feedback input stages, enabling bandwidth that increases with gain-e.g., 140 kHz at G = 100 versus 15 kHz at G = 1000. Its differential output mode supports noise-immune transmission to remote sensors or differential-input ADCs.

Each channel features independent reference inputs (REF1/REF2) for output level-shifting, adjustable common-mode output, and robust input protection including ESD diodes rated to ±VS ±0.3 V. The device maintains ≥80 dB CMRR up to 4 kHz at G = 1 and exhibits only 0.07 µV/V/°C CMRR drift over temperature.

Key Specifications

Pinout & Package

The AD8222HACPZ-R7 uses a 16-lead LFCSP (CP-16-19) package without thermal pad, measuring 4 mm × 4 mm. The exposed pad is internally connected to −VS and must be soldered to the PCB ground plane or −VS net for thermal and electrical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8221ARZ and INA128UA, the AD8222HACPZ-R7 delivers dual-channel functionality in half the PCB area, superior CMRR stability over frequency, and configurable differential output-making it optimal for next-generation compact, multichannel medical and industrial DAQ systems where performance-per-mm² matters.

Availability

AD8222HACPZ-R7 is available at Aetrix Electronics and suitable for ECG monitoring systems, industrial process controllers, and Wheatstone bridge sensor interfaces requiring stable component supply and long-term production continuity.

Supply support for AD8222HACPZ-R7 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 AD8222HACPZ-R7 belongs to Analog Devices' precision instrumentation amplifier product line, engineered specifically for multichannel, low-noise, high-CMRR signal conditioning in medical diagnostics and industrial measurement systems.

FAQ

What is the maximum gain achievable with AD8222HACPZ-R7?

The AD8222HACPZ-R7 supports gains from 1 to 10,000 using a single external resistor per channel, calculated as G = 1 + (49.4 kΩ / RG). At G = 10,000, the required RG is 4.94 Ω; however, practical implementation requires careful attention to resistor tolerance, temperature coefficient, and layout parasitics to maintain accuracy. The AD8222HACPZ-R7 datasheet specifies gain error ≤0.15% for G ≥ 10 under B-grade conditions.

Does AD8222HACPZ-R7 support differential output configuration?

Yes, the AD8222HACPZ-R7 can be configured as a single-channel differential output instrumentation amplifier using internal routing-enabling high noise immunity for remote sensor links or direct drive of differential-input ADCs. This mode is documented in the AD8222 datasheet Figure 50 and Table 4, with measured output balance >60 dB up to 100 kHz. The AD8222HACPZ-R7 does not provide two independent differential outputs; only one channel may operate in differential mode at a time.

What is the operating temperature range for AD8222HACPZ-R7?

The AD8222HACPZ-R7 is fully specified over the industrial temperature range of −40°C to +85°C, with operational capability extended to +125°C. Key parameters-including input offset voltage (≤80 µV), CMRR (≥80 dB to 4 kHz), and supply current (≤1.2 mA per amplifier)-are guaranteed across the full −40°C to +85°C range. The AD8222HACPZ-R7's 0.07 µV/V/°C CMRR drift ensures stable rejection performance even under thermal cycling.

How does the AD8222HACPZ-R7 handle reference input connections?

The AD8222HACPZ-R7 provides dedicated REF1 and REF2 pins to set the output common-mode voltage independently per channel. Each reference input is protected by ESD diodes and must remain within −VS + 0.3 V to +VS − 0.3 V. For optimal CMRR, source impedance to REF pins must be <1 Ω; higher impedances introduce gain-dependent common-mode feedthrough due to internal 10 kΩ resistors. The AD8222HACPZ-R7 transfer function is VOUT = G(V+IN − V−IN) + VREF.

Is AD8222HACPZ-R7 RoHS compliant and lead-free?

Yes, the AD8222HACPZ-R7 is fully RoHS compliant and lead-free, as confirmed in the Analog Devices AD8222 datasheet Rev. B, Page 2. The "HACPZ" suffix denotes a Pb-free, halogen-free, 16-lead LFCSP package (CP-16-19) with NiPdAu lead finish. It meets JEDEC J-STD-020 moisture sensitivity level 3 and is qualified for reflow soldering per IPC/JEDEC J-STD-020.