Analog Devices Inc. AD7983BCPZ-RL7

Overview

AD7983BCPZ-RL7 from Analog Devices is a 16-bit, 1.33 MSPS pseudo-differential successive approximation register (SAR) ADC with zero latency, ±1.0 LSB INL max, 92 dB SNR at 1 kHz, and single 2.5 V supply operation. It features an external reference input (2.9 V to 5.1 V), SPI-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface, and operates across −40°C to +85°C for precision data acquisition in automated test equipment.

For engineers reviewing the AD7983BCPZ-RL7 datasheet, AD7983BCPZ-RL7 pinout, AD7983BCPZ-RL7 application, or AD7983BCPZ-RL7 equivalent, key selection considerations include throughput vs. power trade-offs (10.5 mW at 1.33 MSPS vs. 80 μW at 10 kSPS), reference voltage flexibility (2.9–5.1 V), daisy-chain capability, and LFCSP-10 package thermal performance (θJC = 2.96°C/W).

Technical Context

The AD7983BCPZ-RL7 implements a charge redistribution SAR architecture with on-chip track-and-hold, enabling true zero-latency conversion and no pipeline delay. Its differential sampling core acquires IN+ relative to IN−, supporting pseudo-differential input ranges of 0 V to VREF with VREF independently set between 2.9 V and 5.1 V.

It uses a proprietary SPI-compatible serial interface with dual operational modes: CS mode (3- or 4-wire, optional busy indicator) and Chain mode (daisy-chain capable with SDI as data-in). Interface logic supports 1.8 V/2.5 V/3 V/5 V digital levels via dedicated VIO supply, and conversion timing is internally clocked-SCK only controls data readout.

Key Specifications

Pinout & Package

AD7983BCPZ-RL7 is housed in a 10-lead, 3 mm × 3 mm LFCSP (CP-10-9) with exposed pad connected to GND. Thermal resistance is θJA = 48.7°C/W and θJC = 2.96°C/W under JEDEC 2S2P board conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7983BCPZ-RL7, AD7980BRMZ-REEL trades throughput and interface flexibility for marginally lower cost in simpler designs, while AD4003BRMZ-RL7 delivers superior noise performance at the expense of supply voltage rigidity and loss of VIO-level independence.

Availability

AD7983BCPZ-RL7 is available at Aetrix Electronics and suitable for automated test equipment, medical instruments, and machine automation requiring stable component supply, long-term lifecycle support, and guaranteed authentic Analog Devices sourcing.

Supply support for AD7983BCPZ-RL7 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 AD7983BCPZ-RL7 belongs to Analog Devices' precision SAR ADC product line, designed specifically for high-speed, low-power, high-accuracy data acquisition in industrial, medical, and test equipment where resolution, linearity, and timing determinism are critical.

FAQ

What is the maximum recommended reference voltage for AD7983BCPZ-RL7?

The AD7983BCPZ-RL7 supports an external reference voltage range of 2.9 V to 5.1 V. The maximum recommended value is 5.1 V, as specified in the Absolute Maximum Ratings table. Exceeding this may cause permanent damage. At 5 V reference, the device achieves its rated 92 dB SNR and 93 dB dynamic range, making it optimal for full-scale precision applications.

Does AD7983BCPZ-RL7 require an external clock for conversion?

No, AD7983BCPZ-RL7 does not require an external clock for conversion. It features an on-board conversion clock, so the SCK signal is used solely for serial data readout-not for controlling the sampling or conversion process. This eliminates timing jitter concerns from external clocks and ensures deterministic conversion timing triggered only by the CNV rising edge.

Can AD7983BCPZ-RL7 operate with a 1.8 V digital interface?

Yes, AD7983BCPZ-RL7 supports 1.8 V digital logic levels via its dedicated VIO pin (Pin 10), which accepts 1.71 V to 5.5 V. When VIO = 1.8 V, digital input thresholds adjust accordingly (VIH ≈ 1.62 V, VIL ≈ 0.18 V), and timing parameters adapt-e.g., minimum SCK period increases to 22 ns. This enables seamless interfacing with low-voltage FPGAs and microcontrollers.

What is the thermal performance difference between MSOP and LFCSP packages for AD7983BCPZ-RL7?

The AD7983BCPZ-RL7 in LFCSP (CP-10-9) offers significantly better thermal performance than the MSOP (RM-10) variant: θJC is 2.96°C/W versus 44°C/W, and θJA is 48.7°C/W versus 200°C/W. This makes the LFCSP version preferable for high-throughput operation (1.33 MSPS) in thermally constrained PCBs, as it dissipates heat more efficiently through the exposed pad to the ground plane.

Is AD7983BCPZ-RL7 pin-compatible with any other Analog Devices ADCs?

Yes, AD7983BCPZ-RL7 is pin-for-pin compatible with the 18-bit AD7982, as confirmed in Table 1 of the AD7983 datasheet Rev. C. Both share identical 10-lead MSOP and LFCSP footprints, pin functions, and interface protocols-allowing direct upgrade paths to higher resolution without PCB redesign, provided system firmware accommodates the extended output word length.