AD7657BSTZ

AD7657BSTZ is an Analog Devices multi-channel ADC designed for data acquisition. It is an 8-channel, multiplexed, 12‑bit SAR ADC with a serial (SPI‑style) interface.
Key points
- 8 input channels, multiplexed sampling, 12-bit resolution
- SPI-compatible interface (CS, SCLK, DIN, DOUT)
- Suitable for single‑supply operation; BSTZ denotes the package variant (lead‑free)
- Options typically include flexible input ranges and internal/external reference depending on the exact variant
Applications
- Data acquisition, instrumentation, automotive sensors, test equipment, any multi‑sensor monitoring scenario needing many channels from one ADC
Why use it
- High channel density with a simple digital interface, backed by Analog Devices’ documentation and support
Getting started
- Consult the AD7657BSTZ datasheet for exact timing, pinout, reference options, throughput, input common‑mode ranges, and recommended operating conditions.

Equivalent parts depend on interface and speed. For a 12‑bit, 8‑channel multiplexed ADC like AD7657BSTZ, common cross‑refs include:
- MCP3208 (Microchip) — 12‑bit, 8‑channel, SPI
- ADS7828 (TI) — 12‑bit, 8‑channel, I2C
Note: exact equivalents vary by package, timing, and interface; check cross‑reference tables from the supplier databases.

AD7657BSTZ features:
- 8-channel, 12-bit multiplexed ADC
- SAR (successive-approximation) converter
- Conversion time ~3 μs
- SPI-compatible serial interface (CS, SCLK, DIN, DOUT) with data-ready signaling
- Internal sampling/hold with input multiplexer
- External reference input; full-scale = Vref
- Single-supply operation; input range 0 to Vref (supports single-ended or differential inputs)
- Power-down / low-power modes
- Industrial temperature range (-40°C to +85°C)
- Package: BSTZ (28-lead)

- Pin count: 28 pins (BSTZ RoHS package)
- Function: Analog-to-Digital Converter (SAR type) with a serial (SPI-like) interface; 16-bit resolution with input sampling/multiplexing for converting analog signals to digital data.

Analog Devices, Inc. (ADI) is the manufacturer. It is a US-based multinational semiconductor company that designs and manufactures analog, mixed-signal, and digital signal processing integrated circuits.

Applications of AD7657BSTZ (multi-channel ADC):
- Data acquisition systems and instrumentation front-ends
- Industrial automation and process control
- Automotive sensing, diagnostics, and motor-control instrumentation
- Medical instrumentation and patient monitoring
- Energy, power management, and metering systems
- Environmental monitoring and sensor networks
- Test, measurement, and laboratory equipment
- Aerospace/defense sensing and rugged instrumentation (where applicable)
Note: suitable for multi-channel sensor applications requiring compact, high-speed digitization.

AD7657BSTZ is in a 16-lead TSSOP (Thin Shrink Small Outline Package), RoHS-compliant (Pb-free).