Analog Devices Inc. AD7622BCPZ

Overview

AD7622BCPZ from Analog Devices is a 16-bit, 2 MSPS, fully differential, charge redistribution SAR analog-to-digital converter with ±1.5 LSB INL, 92.5 dB dynamic range, and integrated 2.048 V reference. It operates from a single 2.5 V supply and supports parallel (16-/8-bit) and SPI/QSPI/MICROWIRE-compatible serial interfaces. Used in high-speed medical instrumentation and spectrum analysis systems requiring precision timing and low THD.

For engineers reviewing the AD7622BCPZ datasheet, AD7622BCPZ pinout, AD7622BCPZ application, or AD7622BCPZ equivalent, key selection factors include guaranteed no-missing-codes performance, warp/normal mode throughput flexibility, internal reference drift (±8 ppm/°C), and LFCSP-48 package compatibility with other PulSAR ADCs.

Technical Context

The AD7622BCPZ implements a true differential SAR architecture with zero pipeline delay, enabling deterministic latency critical for real-time control loops. Its dual-mode operation-wideband warp (2 MSPS), warp (2 MSPS), and normal (1.5 MSPS)-is controlled via dedicated WARP and NORMAL pins, each with distinct acquisition time (140 ns vs. 182 ns) and linearity trade-offs.

It integrates a factory-calibrated 2.048 V bandgap reference with buffered REFBUFIN output, configurable power-down (PDREF/PDBUF), and on-chip temperature sensor (278 mV @ 25°C, 1 mV/°C). Digital interface flexibility includes SER/PAR-selectable 16-bit parallel bus or master/slave serial modes with programmable clock division (DIVSCLK[1:0]) and SYNC polarity inversion (INVSYNC).

Key Specifications

Pinout & Package

AD7622BCPZ is housed in a Pb-free, 48-lead LFCSP (Lead Frame Chip Scale Package) with exposed paddle, optimized for thermal performance and board space efficiency. Pin layout supports both parallel and serial interface routing with dedicated ground separation (AGND/DGND/OGND) and supply domains (AVDD/DVDD/OVDD).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed SAR ADC applications.

Compared with AD7622BCPZ, AD7621BCPZ trades internal reference convenience for 0.5 MSPS higher throughput and lower system noise floor, while AD7623BCPZ adds signal conditioning flexibility at identical speed-both retain pin compatibility but require firmware adaptation for new features.

Availability

AD7622BCPZ is available at Aetrix Electronics and suitable for medical instrumentation, high-speed data acquisition, and spectrum analysis requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for AD7622BCPZ 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, with design centers worldwide.

The AD7622BCPZ belongs to the PulSAR® family of precision SAR ADCs, engineered for applications demanding high speed, high resolution, and low power in instrumentation, communications, and industrial test equipment.

FAQ

What is the maximum guaranteed INL for AD7622BCPZ across its operating temperature range?

The AD7622BCPZ guarantees ±1.5 LSB integral nonlinearity over the full −40°C to +85°C industrial temperature range. This specification is measured using endpoint linearity (not best-fit), ensuring predictable full-scale error behavior in calibration-critical systems. The typical INL is ±0.5 LSB, and the value directly impacts DC measurement accuracy in applications like precision weigh scales or sensor calibration fixtures.

Does AD7622BCPZ support both parallel and serial interfaces simultaneously?

No, AD7622BCPZ does not support simultaneous parallel and serial operation. The SER/PAR pin selects one interface mode at power-up: low enables the 16-bit parallel bus (D[15:0]), while high reconfigures D[2:7] and D[9:11] as serial control/data lines (SCLK, SDOUT, SYNC, etc.). This hardware-selectable interface reduces pin count and simplifies PCB routing but requires fixed mode assignment per system design.

Can AD7622BCPZ operate with an external reference voltage, and what is the acceptable range?

Yes, AD7622BCPZ supports external reference operation when PDREF and PDBUF are driven high. The REF pin accepts 1.8 V to 2.5 V (or up to AVDD + 0.1 V), with 150 μA max current draw at 2 MSPS. External reference use disables the internal 2.048 V source and allows higher-precision or temperature-stable references (e.g., ADR4525) to improve overall system accuracy beyond the ±8 ppm/°C drift limit of the internal reference.

What is the purpose of the TEMP pin on AD7622BCPZ, and how is it calibrated?

The TEMP pin on AD7622BCPZ provides an analog voltage output proportional to die temperature: 278 mV at 25°C with a nominal sensitivity of 1 mV/°C. It is factory-trimmed and requires no external calibration. Used for thermal monitoring in sealed enclosures or to compensate ADC gain/offset drift, the output has 4.7 kΩ source impedance and should be buffered before ADC input if digitized externally. It is not intended as a standalone temperature sensor but as a system-level thermal diagnostic aid.

How does the WARP and NORMAL pin configuration affect AD7622BCPZ performance?

WARP and NORMAL pins configure three distinct operating modes: wideband warp (WARP=1, NORMAL=1) offers 2 MSPS with slightly improved linearity/THD; warp mode (WARP=1, NORMAL=0) delivers 2 MSPS with standard specs; normal mode (WARP=0, NORMAL=0) guarantees full accuracy at 1.5 MSPS independent of minimum conversion rate. These modes alter acquisition time (140 ns vs. 182 ns) and internal timing-no software change is needed, enabling hardware-tuned trade-offs between speed and precision.