Analog Devices Inc. AD7983BRMZ-RL7

Overview

AD7983BRMZ-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 supports external reference voltages from 2.9 V to 5.1 V and interfaces via SPI-compatible serial port with daisy-chain capability for data acquisition systems requiring high precision and low power.

For engineers reviewing the AD7983BRMZ-RL7 datasheet, AD7983BRMZ-RL7 pinout, AD7983BRMZ-RL7 application, or AD7983BRMZ-RL7 equivalent, key selection criteria include throughput vs. power trade-offs (10.5 mW at 1.33 MSPS), reference voltage flexibility (2.9–5.1 V), pseudo-differential input architecture, and MSOP/LFCSP package compatibility in automated test and medical instrumentation designs.

Technical Context

The AD7983BRMZ-RL7 implements a charge redistribution SAR architecture with on-chip track-and-hold, delivering true zero-latency conversion and no pipeline delay. Its differential sampling core accepts inputs from 0 V to VREF with respect to IN−, enabling rejection of common-mode noise in sensor front-ends.

It features a proprietary SPI-compatible serial interface supporting CS mode (3-/4-wire) and chain mode, with programmable busy indicator and 1.8 V/2.5 V/3 V/5 V logic compatibility via dedicated VIO pin. Conversion timing is internally clocked, decoupling SCK frequency from conversion rate.

Key Specifications

Pinout & Package

The AD7983BRMZ-RL7 is available in a 10-lead MSOP (RM-10) package with exposed pad option and a 10-lead 3 mm × 3 mm LFCSP (CP-10-9). Both packages share identical pinout and thermal characteristics per Analog Devices' ordering guide.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed precision SAR ADC applications.

Compared with AD7983BRMZ-RL7, AD7982BRMZ trades throughput for resolution and power, while AD7685ARMZ sacrifices speed, interface flexibility, and packaging compatibility to reduce footprint and cost - making AD7983BRMZ-RL7 optimal for balanced high-speed, high-accuracy, and scalable multi-channel designs.

Availability

AD7983BRMZ-RL7 is available at Aetrix Electronics and suitable for automated test equipment, medical instruments, and machine automation requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.

Supply support for AD7983BRMZ-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 AD7983BRMZ-RL7 belongs to Analog Devices' PulSAR® family of precision SAR ADCs, engineered for applications demanding high speed, low power, and exceptional dc/ac accuracy in compact form factors.

FAQ

What is the maximum recommended reference voltage for AD7983BRMZ-RL7?

The AD7983BRMZ-RL7 supports an external reference voltage range of 2.9 V to 5.1 V. The maximum recommended value is 5.1 V per Absolute Maximum Ratings, though typical operation uses 5.0 V to achieve specified 92 dB SNR and 93 dB dynamic range. Exceeding 5.1 V risks permanent damage to the REF pin.

Does AD7983BRMZ-RL7 require an external clock for conversion?

No, the AD7983BRMZ-RL7 contains an on-board conversion clock and does not require an external clock for the SAR process. The SCK signal is used only for serial data readout and has no effect on conversion timing or throughput, which remains fixed at 1.33 MSPS regardless of SCK frequency.

Can AD7983BRMZ-RL7 operate with a 1.8 V digital interface?

Yes, the AD7983BRMZ-RL7 supports 1.8 V digital logic via its dedicated VIO pin. When VIO = 1.8 V, VIH is defined as 0.9 × VIO = 1.62 V and VIL as 0.1 × VIO = 0.18 V, allowing direct connection to 1.8 V FPGAs or microcontrollers without level translation.

What is the purpose of the IN− pin on AD7983BRMZ-RL7?

The IN− pin on AD7983BRMZ-RL7 serves as the pseudo-differential analog ground sense reference. It establishes the common-mode baseline for the IN+ input, enabling common-mode noise rejection up to 60 dB at 100 kHz. It must be connected to the analog ground plane or a remote sense point-not left floating-to maintain specified accuracy and CMRR.

Is AD7983BRMZ-RL7 pin-compatible with any other Analog Devices ADCs?

Yes, AD7983BRMZ-RL7 is pin-for-pin compatible with the 18-bit AD7982, as confirmed in Table 1 of the AD7983 datasheet Rev. C. This allows drop-in resolution upgrades in existing MSOP or LFCSP layouts, provided system firmware accommodates the extended output word length and updated timing margins.