Analog Devices Inc. AD7811YRZ

Overview

AD7811YRZ from Analog Devices is a 10-bit, 4-channel successive approximation ADC with 2.3 µs conversion time, onboard 2.5 V ±2.5% reference, and DSP/microcontroller-compatible serial interface. It operates from a single 2.7 V to 5.5 V supply, consumes 10.5 mW at 3 V, and supports pseudo-differential or single-ended input configurations for industrial sensor signal acquisition.

For engineers reviewing the AD7811YRZ datasheet, AD7811YRZ pinout, AD7811YRZ application, or AD7811YRZ equivalent, key selection considerations include its 350 kSPS throughput, channel-to-channel isolation of –80 dB, ±1 LSB relative accuracy, and TSSOP-16 package compatibility with space-constrained embedded data acquisition systems.

Technical Context

The AD7811YRZ implements a charge redistribution DAC architecture with integrated track-and-hold, enabling precise sampling of analog signals up to 30 kHz while maintaining 58 dB SNR. Its control register supports software-configurable input modes (single-ended or pseudo-differential), hardware/software convert start, and dual power-down states (full or partial).

It features a dedicated package address pin (A0) and frame sync logic (RFS/TFS) for multi-device serial bus sharing, and its VREF input accepts external references from 1.2 V to VDD-enabling flexible full-scale range selection without external buffer circuitry.

Key Specifications

Pinout & Package

AD7811YRZ is housed in a 16-lead Thin Shrink Small Outline Package (TSSOP), 4.4 mm × 5.0 mm × 1.2 mm body, 0.65 mm lead pitch, RoHS-compliant, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit SAR ADC applications.

Compared with AD7811YRZ, AD7910BRMZ offers higher speed but increases design complexity with external reference dependency, while ADS7822U delivers greater resolution at lower throughput and no integrated reference-making AD7811YRZ optimal for cost-sensitive, space-constrained 10-bit applications requiring self-contained operation.

Availability

AD7811YRZ is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable data acquisition systems, and automotive battery monitoring requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AD7811YRZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.

The AD7811YRZ belongs to Analog Devices' precision SAR ADC product line, designed specifically for embedded systems requiring low power, small footprint, and flexible analog input configuration without external support components.

FAQ

What is the maximum sampling rate supported by the AD7811YRZ?

The AD7811YRZ supports a maximum throughput of 350 kSPS, achieved with a 2.3 µs conversion time and minimal inter-conversion delay. This rate is guaranteed across the full operating temperature range (–40°C to +105°C) and supply range (2.7 V to 5.5 V), making it suitable for real-time monitoring of dynamic analog signals such as motor currents or vibration sensors.

Does the AD7811YRZ require an external reference voltage?

No, the AD7811YRZ includes an on-chip 2.5 V ±2.5% reference that is fully functional out-of-the-box. An external reference may be used by connecting it to the VREF pin and setting the EXTREF bit in the control register; doing so disables the internal reference and reduces supply current by ~1 mA. The VREF pin also accepts VDD directly as reference when EXTREF = 1.

How many analog input channels does the AD7811YRZ support, and how are they configured?

The AD7811YRZ supports four analog input pins (VIN1–VIN4) that can be configured as either four single-ended channels referenced to AGND or three pseudo-differential pairs (VIN1–VIN4, VIN2–VIN4, VIN3–VIN4) via the VIN4/AGND and DIF/SGL bits in the 10-bit control register. Configuration is software-selectable without hardware changes.

What package type is used for the AD7811YRZ, and what are its key mechanical dimensions?

The AD7811YRZ is supplied in a 16-lead Thin Shrink Small Outline Package (TSSOP) with 0.65 mm lead pitch. Its body dimensions are 4.4 mm × 5.0 mm × 1.2 mm, and it complies with JEDEC MO-178AB standards. This compact RoHS-compliant package supports fine-pitch automated assembly and provides superior thermal performance versus DIP or standard SOIC variants.

Can multiple AD7811YRZ devices share the same serial bus?

Yes, two AD7811YRZ devices (or one AD7811YRZ and one AD7812) can share the same SCLK/DIN/DOUT lines using the hardware A0 pin and corresponding address bit in the control register. Only the device whose A0 state matches the address bit in the received control byte will respond to subsequent serial reads, enabling efficient multi-channel expansion without additional GPIOs.