Analog Devices Inc. AD8253ARMZ

Overview

AD8253ARMZ from Analog Devices is a programmable gain instrumentation amplifier (PGIA) with iCMOS® process technology, delivering 10 MHz bandwidth, 20 V/μs slew rate, and selectable gains of 1, 10, 100, or 1000. It features gigaohm input impedance, low 10 nV/√Hz noise (G = 1000), and high CMRR ≥100 dB up to 20 kHz - optimized for precision sensor signal conditioning in high-speed data acquisition systems.

For engineers reviewing the AD8253ARMZ datasheet, AD8253ARMZ pinout, AD8253ARMZ application, or AD8253ARMZ equivalent, this page provides verified technical context, gain-switching timing behavior, dc accuracy specs (e.g., 1.2 μV/°C offset drift at G = 1000), and real-world design implications for interfacing with ADCs and biomedical front-ends.

Technical Context

The AD8253ARMZ implements a classic 3-op-amp instrumentation topology with laser-trimmed internal resistor arrays enabling precise, digitally controlled gain switching. Its iCMOS® process ensures robust isolation between analog and digital domains while maintaining low distortion (−110 dB THD) and fast settling (780 ns to 0.001% at G = 1).

Gain selection operates in two modes: transparent (gain set directly by A0/A1 logic levels when WR = −VS) or latched (WR edge-triggered sampling of A0/A1). Both modes support parallel digital control with guaranteed 325 ns gain switching time, and the device maintains stable performance across ±5 V to ±15 V supplies and −40°C to +85°C.

Key Specifications

Pinout & Package

AD8253ARMZ is housed in a 10-lead MSOP (RM-10) package with exposed pad for thermal enhancement, specified for −40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8251ARMZ and LTC6915IMS8#PBF, the AD8253ARMZ uniquely delivers 10 MHz bandwidth with 1000× gain and <1.2 μV/°C drift - making it the only option among the three for high-speed, high-precision, wide-dynamic-range sensor digitization.

Availability

AD8253ARMZ is available at Aetrix Electronics and suitable for data acquisition, biomedical analysis, and test and measurement applications requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across −40°C to +85°C.

Supply support for AD8253ARMZ 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 AD8253ARMZ belongs to Analog Devices' precision instrumentation amplifier product line, engineered specifically for high-speed, high-accuracy sensor signal conditioning in demanding industrial and medical instrumentation.

FAQ

What gain options does the AD8253ARMZ support, and how are they selected?

The AD8253ARMZ supports four discrete gains: 1, 10, 100, and 1000. Gain is selected via two digital inputs (A0 and A1) using either transparent mode (WR tied to −VS) or latched mode (WR edge-triggered). In transparent mode, gain changes immediately with A0/A1 logic levels; in latched mode, the gain updates on the falling edge of WR. The AD8253ARMZ datasheet specifies setup/hold times (tSU = 15 ns, tHD = 30 ns) to ensure reliable switching.

Does the AD8253ARMZ require external resistors for gain setting?

No, the AD8253ARMZ does not require external resistors for gain setting. All gain-setting resistors are laser-trimmed and integrated internally using Analog Devices' iCMOS® process. This eliminates matching errors, temperature drift, and board space associated with external resistor networks - a key advantage over discrete instrumentation amplifier implementations. The AD8253ARMZ achieves <0.04% gain error across all settings without user calibration.

How does the AD8253ARMZ handle common-mode rejection at high frequencies?

The AD8253ARMZ guarantees ≥100 dB CMRR up to 20 kHz at G = 1000, enabled by its balanced input architecture and optimized pinout that minimizes parasitic capacitance asymmetry. Unlike many PGIAs, its CMRR remains stable across frequency due to internal resistor matching and layout symmetry - critical for rejecting switching noise in motor drives or SMPS environments. Measured data (Figure 20) confirms >80 dB CMRR even at 100 kHz for G = 1.

Can the AD8253ARMZ drive ADC inputs directly, and what load conditions apply?

Yes, the AD8253ARMZ can directly drive SAR and delta-sigma ADC inputs. Its output swings to ±13.6 V (at ±15 V supplies) with <1.8 μs settling to 0.001% at G = 1000, and it drives 2 kΩ loads continuously. For capacitive loads >100 pF, external isolation resistors are recommended per Figure 36. The AD8253ARMZ output stage delivers 37 mA short-circuit current, supporting robust interface to ADC input buffers without external drivers.

What is the operating temperature range and supply voltage specification for the AD8253ARMZ?

The AD8253ARMZ is fully specified from −40°C to +85°C ambient temperature and operates from ±5 V to ±15 V dual supplies. Quiescent current is 4.6–5.3 mA per rail (6 mA max over temperature), and absolute maximum ratings allow ±17 V supplies. Its iCMOS® construction ensures stable performance across this range, with guaranteed offset drift ≤1.2 μV/°C and gain drift ≤10 ppm/°C at G = 1000 - validated in production testing per Rev. B datasheet.