Analog Devices Inc. AD7812YRUZ-REEL7

Overview

AD7812YRUZ-REEL7 from Analog Devices is a 10-bit, 8-channel single-supply sampling ADC with 350 kSPS throughput, on-chip 2.5 V ±2.5% reference, and DSP/microcontroller-compatible serial interface. It operates from 2.7 V to 5.5 V, features pseudo-differential input configuration, and supports automotive-grade temperature range (–40°C to +105°C). Used in sensor signal acquisition for industrial monitoring systems.

For engineers reviewing the AD7812YRUZ-REEL7 datasheet, AD7812YRUZ-REEL7 pinout, AD7812YRUZ-REEL7 application, or AD7812YRUZ-REEL7 equivalent, key selection considerations include its 8 single-ended / 4 pseudo-differential input channels, 2.3 µs conversion time, automatic power-down mode (315 µW @ 10 kSPS), 20-lead TSSOP package, and compatibility with shared serial bus architectures via A0 address pin.

Technical Context

The AD7812YRUZ-REEL7 implements a charge redistribution successive approximation ADC architecture with integrated track-and-hold amplifier. Its control register enables software-configurable input modes-single-ended (VIN1–VIN8 to AGND) or pseudo-differential (e.g., VIN1–VIN2, VIN3–VIN4)-via DIF/SGL, CH2:CH0, and VIN8/AGND bits.

It uses a 3-wire serial interface (SCLK, RFS, TFS, DIN, DOUT) with frame-sync timing compatible with TI C5x/C6x and ADSP-21xx DSPs. The device supports hardware- and software-initiated conversions, full/partial power-down modes, and dual-device bus sharing using the A0 pin and control register address bit.

Key Specifications

Pinout & Package

AD7812YRUZ-REEL7 is housed in a 20-lead Thin Shrink Small Outline Package (TSSOP), RU-20 footprint (4.4 mm × 6.5 mm, 0.65 mm pitch), optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7812YRUZ-REEL7, AD7910BRMZ-REEL offers higher throughput but increases BOM cost and layout complexity due to external reference requirements; ADS7822U trades channel count and configurability for resolution and size-making AD7812YRUZ-REEL7 optimal for multi-sensor, space-constrained, reference-integrated designs.

Availability

AD7812YRUZ-REEL7 is available at Aetrix Electronics and suitable for industrial sensor hubs, automotive battery monitors, and portable medical instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AD7812YRUZ-REEL7 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 Wilmington, MA.

The AD7811/AD7812 product line delivers low-power, multi-channel SAR ADCs designed specifically for cost-sensitive, space-constrained embedded systems requiring flexible analog input configuration and automotive-grade reliability.

FAQ

What is the maximum sampling rate supported by the AD7812YRUZ-REEL7?

The AD7812YRUZ-REEL7 supports a maximum sampling rate of 350 kSPS, corresponding to a guaranteed 2.3 µs conversion time. This allows acquisition of signals with fundamental frequencies up to 175 kHz under Nyquist criteria. The actual achievable rate depends on serial interface clock speed, CONVST timing, and power-down recovery delays specified in the timing characteristics table.

Does the AD7812YRUZ-REEL7 require an external reference voltage?

No, the AD7812YRUZ-REEL7 includes an internal 2.5 V ±2.5% reference that is enabled by default. An external reference (1.2 V to VDD) may be used by setting the EXTREF bit in the control register, which automatically powers down the internal reference circuitry and reduces current consumption by ~1 mA.

How many analog input channels does the AD7812YRUZ-REEL7 support, and how are they configured?

The AD7812YRUZ-REEL7 supports eight analog input channels (VIN1–VIN8), configurable via its 10-bit control register as either eight single-ended inputs referenced to AGND or four pseudo-differential pairs (VIN1/VIN2, VIN3/VIN4, VIN5/VIN6, VIN7/VIN8). Configuration is fully software-controlled without hardware modification.

What package type is used for the AD7812YRUZ-REEL7, and what are its key mechanical features?

The AD7812YRUZ-REEL7 uses a 20-lead Thin Shrink Small Outline Package (TSSOP), designated RU-20. It measures 4.4 mm × 6.5 mm with 0.65 mm lead pitch, features gull-wing leads for standard reflow soldering, and is rated for surface-mount assembly in high-volume manufacturing environments.

Can multiple AD7812YRUZ-REEL7 devices share the same serial bus?

Yes, two AD7812YRUZ-REEL7 devices can share the same 3-wire serial bus using the A0 package address pin and the A0 bit in the control register. When A0 is hardwired high on one device and low on the other, each responds only to control words matching its address bit-enabling coordinated 12-channel acquisition without additional interface lines.