Analog Devices Inc. AD7693BCPZ-R2

Overview

AD7693BCPZ-R2 from Analog Devices is a 16-bit, 500 kSPS PulSAR® successive-approximation ADC (SAR ADC) in a 20-lead LFCSP package (3 mm × 3 mm), featuring pseudo-differential unipolar input, on-chip reference (2.5 V), and SPI-compatible serial interface. It operates from a single 5 V supply and supports ±10 V or 0–10 V input ranges via external resistor networks, targeting precision data acquisition in industrial PLCs, battery-powered instrumentation, and medical sensors.

For engineers reviewing the AD7693BCPZ-R2 datasheet, AD7693BCPZ-R2 pinout, AD7693BCPZ-R2 application, or AD7693BCPZ-R2 equivalent, key selection considerations include its 500 kSPS throughput with no pipeline delay, 91.5 dB SNR at 10 kHz, guaranteed monotonicity over temperature, integrated reference buffer, and low power consumption (11 mW at 500 kSPS).

Technical Context

The AD7693BCPZ-R2 implements a charge redistribution SAR architecture with internal sampling capacitor array and precision comparator. It uses an internal 2.5 V bandgap reference with ±0.2% initial accuracy and 10 ppm/°C drift, buffered to drive the ADC core and external circuits. Conversion timing is controlled by CS falling edge, with BUSY assertion indicating conversion progress and RDY signal confirming completion.

Its SPI interface supports SCLK up to 30 MHz, operates in Mode 0 (CPOL = 0, CPHA = 0), and outputs 16-bit data with MSB-first format. The device includes programmable power-down modes (1 μA standby, 30 nA shutdown), hardware and software configurable conversion start, and robust ESD protection (±4 kV HBM).

Key Specifications

Pinout & Package

AD7693BCPZ-R2 is housed in a 20-lead Lead Frame Chip Scale Package (LFCSP) with exposed paddle (CP-20-3), measuring 3 mm × 3 mm × 0.55 mm. The package features wettable flank leads for automated optical inspection (AOI) and enhanced solder joint reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7693BCPZ-R2, AD7682BCPZ-R2 trades speed for lower power in static sensing, while ADS8860IRGET offers higher throughput at the cost of increased design complexity and missing integrated reference functionality.

Availability

AD7693BCPZ-R2 is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical instrumentation, and programmable logic controller (PLC) analog input modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AD7693BCPZ-R2 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 AD7693BCPZ-R2 belongs to the PulSAR® family of precision SAR ADCs, designed specifically for high-accuracy, low-latency data acquisition in industrial, medical, and test equipment where deterministic timing and minimal system-level calibration are essential.

FAQ

What is the maximum SPI clock frequency supported by the AD7693BCPZ-R2?

The AD7693BCPZ-R2 supports SCLK up to 30 MHz in SPI Mode 0 (CPOL = 0, CPHA = 0). At this rate, the full 16-bit conversion result can be read in 533 ns, enabling tight integration with high-speed microcontrollers and FPGAs. This timing is fully characterized across −40°C to +85°C and specified in the AD7693BCPZ-R2 datasheet Rev. C.

Does the AD7693BCPZ-R2 require an external reference, or is it self-contained?

The AD7693BCPZ-R2 includes a fully integrated 2.5 V bandgap reference with ±0.2% initial accuracy and 10 ppm/°C temperature coefficient. No external reference is required for basic operation. The REF pin provides a buffered output capable of sourcing up to 1 mA, allowing it to serve as a stable reference for external circuitry such as sensor excitation or gain stages-eliminating the need for additional reference ICs in the AD7693BCPZ-R2 system design.

How does the AD7693BCPZ-R2 handle power management in battery-operated systems?

The AD7693BCPZ-R2 offers three power states: active (11 mW at 500 kSPS), standby (1 μA), and shutdown (30 nA). A dedicated PD pin controls entry into standby mode, while hardware reset or SPI command initiates shutdown. This granular control enables precise energy budgeting in portable devices-e.g., waking the AD7693BCPZ-R2 only during scheduled sensor reads and returning to 30 nA shutdown between measurements to maximize battery longevity.

Can multiple AD7693BCPZ-R2 devices be connected to a single SPI bus?

Yes, the AD7693BCPZ-R2 supports daisy-chain configuration: connect SDO of one device to SDI of the next, share SCLK and CONVST, and use individual CS lines. In this mode, a single SPI transaction reads out conversion results from all chained devices sequentially. This reduces GPIO count and simplifies firmware for multi-channel systems-confirmed in the AD7693BCPZ-R2 functional description and timing diagrams.

What is the guaranteed operating temperature range for the AD7693BCPZ-R2?

The AD7693BCPZ-R2 is specified for operation from −40°C to +85°C ambient temperature. All key parameters-including INL (±1.5 LSB), SNR (91.5 dB), and reference drift (10 ppm/°C)-are guaranteed across this full industrial temperature range. This makes the AD7693BCPZ-R2 suitable for deployment in harsh environments such as factory floors, outdoor substations, and mobile medical carts without derating or thermal compensation.