Analog Devices Inc. AD7983BRMZ

Overview

AD7983BRMZ from Analog Devices is a 16-bit, 1.33 MSPS pseudo-differential successive approximation register (SAR) ADC with zero-latency architecture, 92 dB SNR at 1 kHz, ±1.0 LSB max INL, and operation from single 2.5 V supply. It supports external reference voltages from 2.9 V to 5.1 V and targets high-precision data acquisition in automated test equipment and medical instrumentation.

For engineers reviewing the AD7983BRMZ datasheet, AD7983BRMZ pinout, AD7983BRMZ application, or AD7983BRMZ equivalent, key selection criteria include throughput scalability (10 kSPS to 1.33 MSPS), SPI/QSPI/MICROWIRE-compatible serial interface with daisy-chain capability, low 10.5 mW total power at full rate, and dual-package availability in 10-lead MSOP and 3 mm × 3 mm LFCSP.

Technical Context

The AD7983BRMZ implements a charge redistribution SAR architecture with integrated track-and-hold, enabling true zero-latency conversion and no pipeline delay. Its proprietary serial interface supports both CS-mode (3- or 4-wire) and chain-mode configurations, with optional busy indicator and 1.8 V–5 V logic compatibility via dedicated VIO supply.

It samples pseudo-differential inputs (IN+ to IN−) over 0 V to VREF range, where VREF is externally applied and independent of VDD. Power consumption scales linearly with throughput-dropping to 80 μW at 10 kSPS-while maintaining 16-bit no-missing-codes performance across −40°C to +85°C.

Key Specifications

Pinout & Package

AD7983BRMZ is available in two RoHS-compliant packages: 10-lead MSOP (RM-10) and 10-lead 3 mm × 3 mm LFCSP (CP-10-9). Both share identical pin numbering and function mapping; the LFCSP variant includes an exposed pad (EPAD) that must be connected to GND for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7983BRMZ, AD7980BRMZ offers identical package and interface with modest speed reduction, while AD7982BRMZ delivers 2 extra bits of resolution at same pinout-making both viable alternatives depending on whether speed or precision dominates the design requirement.

Availability

AD7983BRMZ is available at Aetrix Electronics and suitable for automated test equipment, medical instruments, and machine automation requiring stable component supply, long-term manufacturability, and guaranteed traceability.

Supply support for AD7983BRMZ 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 belongs to Analog Devices' precision SAR ADC product line, engineered for high-speed, low-power, high-accuracy data acquisition in demanding industrial, medical, and test instrumentation applications.

FAQ

What is the maximum sampling rate of the AD7983BRMZ?

The AD7983BRMZ achieves a maximum throughput rate of 1.33 million samples per second (MSPS) under specified conditions (VDD = 2.5 V, VIO ≥ 4.5 V, REF = 5 V). This rate is maintained across the full industrial temperature range (−40°C to +85°C) and is validated in the Rev. C datasheet Table 2. The AD7983BRMZ sustains this performance without pipeline delay or latency, making it suitable for real-time waveform capture.

Does the AD7983BRMZ require an external reference voltage?

Yes, the AD7983BRMZ requires an external reference voltage applied to the REF pin. The device supports a reference range of 2.9 V to 5.1 V, independent of the 2.5 V VDD supply. This flexibility allows system designers to optimize dynamic range and noise performance based on sensor output levels. A 10 µF capacitor must be placed close to the REF pin for stability, as specified in the Pin Function Descriptions section of the AD7983BRMZ datasheet.

Is the AD7983BRMZ compatible with 1.8 V logic interfaces?

Yes, the AD7983BRMZ supports 1.8 V logic through its dedicated VIO supply pin, which accepts 1.71 V to 5.5 V. When VIO = 1.8 V, the digital inputs meet VIH/VIL thresholds per Table 2, and timing parameters (e.g., tSCK = 22 ns minimum) remain valid. This eliminates the need for external level shifters when interfacing with low-voltage FPGAs or microcontrollers, preserving signal integrity and reducing BOM count.

What package options are available for the AD7983BRMZ?

The AD7983BRMZ is offered in two surface-mount packages: a 10-lead MSOP (RM-10) and a 10-lead 3 mm × 3 mm LFCSP (CP-10-9). Both share identical pinout, electrical specifications, and thermal characteristics per Table 7 (θJA = 200°C/W for MSOP, 48.7°C/W for LFCSP). The LFCSP variant includes an exposed pad that must be soldered to GND for optimal thermal dissipation, as noted in Figure 4 and Table 8 of the AD7983BRMZ datasheet.

Can multiple AD7983BRMZ devices be connected on a single SPI bus?

Yes, the AD7983BRMZ supports daisy-chain configuration via its SDI/SDO pins and CNV-controlled mode selection. In chain mode (activated by pulling SDI low at CNV rising edge), up to N devices can share one SCK line and one SDO line, with each device delaying upstream data by 16 SCK cycles. This reduces host GPIO usage and simplifies routing in multi-channel systems-confirmed in the Digital Interface section and Figure 22 of the AD7983BRMZ datasheet.