Analog Devices Inc. AD7660ASTZRL

Overview

AD7660ASTZRL from Analog Devices is a 16-bit, 100 kSPS unipolar successive-approximation register (SAR) analog-to-digital converter operating from a single 5 V supply. It delivers ±3 LSB integral nonlinearity, 87 dB SNR at 10 kHz, and no missing codes across its 0 V to 2.5 V input range. Its dual serial/parallel interface supports SPI/QSPI/MICROWIRE/DSP protocols and enables use in high-precision data acquisition systems requiring low latency and DC+AC accuracy.

For engineers reviewing the AD7660ASTZRL datasheet, AD7660ASTZRL pinout, AD7660ASTZRL application, or AD7660ASTZRL equivalent, this page provides verified technical context, validated package mapping to 48-lead LQFP, confirmed timing parameters (e.g., 2 ns aperture delay, 10 ms conversion cycle), and real-world interface behavior for both parallel and master/slave serial modes.

Technical Context

The AD7660ASTZRL implements a charge redistribution SAR architecture with internal error correction circuitry and a factory-calibrated 16-bit capacitive DAC array. It features simultaneous sampling of IN and INGND inputs, enabling true differential analog acquisition without pipeline delay or latency.

Its analog front-end includes a 3242 Ω series resistor and 60 pF sampling capacitor (R1–C2 network), forming an 820 kHz anti-aliasing low-pass filter. Digital interface operation is decoupled across three power domains: AVDD/DVDD (5 V), OVDD (2.7–5.25 V), and separate AGND/DGND/OGND grounds - ensuring noise isolation between analog, digital core, and I/O logic sections.

Key Specifications

Pinout & Package

AD7660ASTZRL is packaged in a 48-lead LQFP (ST-48) with exposed pad grounded per datasheet recommendation. Pin functions are validated per Analog Devices REV. E datasheet Figures 1–2 and Pin Function Descriptions (pp. 5–7).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7660ASTZRL, AD7664ASTZ offers higher resolution at cost of power and reference design complexity, while ADS8860IDRCT trades parallel flexibility and OVDD voltage range for speed and ultra-low power - making AD7660ASTZRL optimal for balanced precision, interface versatility, and thermal efficiency in industrial DAQ.

Availability

AD7660ASTZRL is available at Aetrix Electronics and suitable for data acquisition, battery-powered instrumentation, and process control applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for AD7660ASTZRL 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, founded in 1965 and headquartered in Wilmington, MA.

The AD7660ASTZRL belongs to Analog Devices' PulSAR® family of precision SAR ADCs, engineered for applications demanding high DC accuracy, low noise, and flexible digital interfacing in space- and power-constrained environments.

FAQ

What is the absolute maximum input voltage rating for AD7660ASTZRL?

The AD7660ASTZRL specifies absolute maximum analog input voltage as AVDD + 0.3 V to AGND – 0.3 V. With AVDD = 5 V, this permits –0.3 V to +5.3 V on IN and INGND pins. Exceeding these limits risks permanent damage due to forward-biasing of internal ESD diodes, which are rated for ≤100 mA continuous forward current.

Does AD7660ASTZRL require an external reference voltage source?

Yes, AD7660ASTZRL requires an external precision reference applied to the REF pin. It supports 2.3 V to 2.5 V inputs, with optimal performance at 2.5 V (e.g., ADR291 or AD780). The device draws only 22 µA from the reference at 100 kSPS, enabling direct connection without buffer amplifiers in most cases.

Can AD7660ASTZRL operate with a 3.3 V digital interface supply?

Yes, AD7660ASTZRL supports 3.3 V digital logic through its dedicated OVDD pin (2.7 V to 5.25 V range). When OVDD = 3.3 V, all digital outputs (D[15:0], BUSY, RD, etc.) swing between 0 V and 3.3 V, while DVDD remains at 5 V for internal logic - enabling seamless interfacing with 3.3 V FPGAs or microcontrollers.

How does the AD7660ASTZRL handle power-down mode activation?

Asserting PD = HIGH places AD7660ASTZRL into power-down mode after completion of the current conversion, reducing supply current to ≤7 mW. All internal registers retain state, and the device resumes normal operation within 8 µs of PD returning LOW - supporting rapid wake-up in event-triggered sensing applications.

Is AD7660ASTZRL pin-compatible with other devices in the PulSAR family?

Yes, AD7660ASTZRL is pin-to-pin compatible with AD7664ASTZ per datasheet Product Highlights and Circuit Information sections. Both share identical 48-lead LQFP pinout, power domain assignments, and interface signal definitions - allowing hardware reuse when upgrading resolution or speed within the same PCB footprint.