Analog Devices Inc. AD7664ACPZ

Overview

AD7664ACPZ from Analog Devices is a 16-bit, 570 kSPS charge redistribution SAR analog-to-digital converter operating from a single 5 V supply. It delivers ±2.5 LSB INL, 90 dB SNR at 45 kHz, and no missing codes across its 0 V to 2.5 V unipolar input range. It serves as a high-accuracy, low-latency ADC in precision data acquisition systems requiring real-time waveform capture without pipeline delay.

For engineers reviewing the AD7664ACPZ datasheet, AD7664ACPZ pinout, AD7664ACPZ application, or AD7664ACPZ equivalent, key selection considerations include its Warp/Normal/Impulse mode throughput scaling (570/500/444 kSPS), dual serial/parallel 3 V–5 V interface compatibility, and factory-calibrated DC/AC performance over –40°C to +85°C.

Technical Context

The AD7664ACPZ implements a switched-capacitor DAC-based successive-approximation architecture with internal error correction circuitry. Its conversion core uses binary-weighted capacitors and a dummy capacitor referenced to REFGND, enabling true zero-latency sampling with aperture jitter of only 5 ps rms.

It supports three hardware-selectable operating modes: Warp Mode (1.75 µs conversion cycle, 570 kSPS, requires ≤1 ms inter-conversion timing for full accuracy), Normal Mode (2 µs cycle, 500 kSPS, no timing constraints), and Impulse Mode (2.25 µs cycle, 444 kSPS, power scales linearly with throughput down to 21 µW at 100 SPS).

Key Specifications

Pinout & Package

AD7664ACPZ is housed in a 48-lead LFCSP (Lead Frame Chip Scale Package) with exposed pad grounded per datasheet Note 2. Pin numbering follows standard top-view layout with AGND (Pin 1), AVDD (Pin 2), NC (Pins 3,40–42,44–48), DGND (Pin 4), OB/2C (Pin 5), WARP (Pin 6), IMPULSE (Pin 7), SER/PAR (Pin 8), D[0:3] (Pins 9–12), and so on through IN (Pin 43), INGND (Pin 39), REF (Pin 37), and REFGND (Pin 38).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit SAR ADC applications.

Compared with AD7660ASTZ, AD7664ACPZ adds 70 kSPS throughput, tighter INL, and scalable power modes; compared with ADS8860IDRCT, it offers dual-interface flexibility, hardware mode selection, and 5 V native operation - making AD7664ACPZ optimal for industrial DAQ upgrades and mixed-voltage test equipment.

Availability

AD7664ACPZ is available at Aetrix Electronics and suitable for high-speed data acquisition, precision instrumentation, and battery-powered test equipment requiring stable component supply and long-term lifecycle support.

Supply support for AD7664ACPZ 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 AD7664ACPZ belongs to the PulSAR® family of precision SAR ADCs, designed specifically for applications demanding high resolution, fast throughput, and low power without sacrificing AC/DC accuracy.

FAQ

What are the supported operating modes of the AD7664ACPZ and how do they affect throughput?

The AD7664ACPZ supports three hardware-selectable modes: Warp (570 kSPS, 1.75 µs cycle), Normal (500 kSPS, 2 µs cycle), and Impulse (444 kSPS, 2.25 µs cycle with throughput-scaled power). In Warp Mode, full accuracy requires inter-conversion timing ≤1 ms; Normal Mode imposes no such constraint. The AD7664ACPZ achieves 21 µW at 100 SPS in Impulse Mode, making it ideal for intermittent sampling applications.

Does the AD7664ACPZ require an external reference, and what voltage range is supported?

Yes, the AD7664ACPZ requires an external reference applied to the REF pin. It accepts 2.3 V to 2.5 V, with specified performance at 2.5 V. Reference current drain is ≤115 µA at 570 kSPS. The AD7664ACPZ does not include an internal reference; using a precision 2.5 V source (e.g., ADR431) ensures full 16-bit linearity and minimizes full-scale error contribution.

How does the AD7664ACPZ handle digital interface selection between parallel and serial operation?

The AD7664ACPZ uses the SER/PAR pin (Pin 8): LOW selects 16-bit parallel output on D[0:15], while HIGH configures D4–D11 as serial interface signals (SDOUT, SCLK, SYNC, SDIN). OB/2C (Pin 5) further defines output coding (straight binary or twos complement). This dual-mode capability allows the same AD7664ACPZ to interface directly with microcontrollers via SPI or with FPGAs via wide parallel bus - reducing design variants.

What is the significance of the WARP and IMPULSE pins on the AD7664ACPZ?

WARP (Pin 6) and IMPULSE (Pin 7) are dedicated hardware mode control inputs. Their logic states determine operational mode: WARP=HIGH/IMPULSE=LOW → Warp Mode (570 kSPS); WARP=LOW/IMPULSE=HIGH → Impulse Mode (power-scaled operation); both LOW → Normal Mode (500 kSPS, no timing restrictions). These pins enable deterministic, glitch-free mode switching without software intervention - critical for real-time reconfiguration in adaptive test systems.

Is the AD7664ACPZ pin-compatible with any earlier Analog Devices ADCs?

Yes, the AD7664ACPZ is pin-to-pin compatible with the AD7660ASTZ in both 48-lead LQFP and LFCSP packages. This allows direct replacement in existing designs to gain +70 kSPS throughput, ±0.5 LSB better INL, and Impulse Mode power scaling - without PCB redesign or layout changes. The AD7664ACPZ maintains identical pin functions, timing, and interface behavior, ensuring seamless migration.