Analog Devices Inc. AD7810YRM-REEL7

Overview

AD7810YRM-REEL7 from Analog Devices is a 10-bit successive approximation ADC with inherent track-and-hold, 2.3 µs conversion time, 2.7 V to 5.5 V single-supply operation, and microSOIC-8 packaging - used in battery-powered test equipment for precise analog-to-digital conversion of unipolar 0 V to VREF signals.

For engineers reviewing the AD7810YRM-REEL7 datasheet, AD7810YRM-REEL7 pinout, AD7810YRM-REEL7 application, or AD7810YRM-REEL7 equivalent, key selection considerations include guaranteed 10-bit no-missing-codes performance, automatic power-down mode enabling 270 µW at 10 kSPS, pseudo-differential input architecture, and compatibility with SPI/QSPI microcontrollers via 3-wire serial interface.

Technical Context

The AD7810YRM-REEL7 implements a charge redistribution DAC-based SAR architecture with internal oscillator, supporting both Mode 1 (continuous high-speed sampling, 2.3 µs conversion, no inter-conversion power-down) and Mode 2 (automatic power-down after each conversion, 1.5 µs wake-up + 2.3 µs conversion). It features pseudo-differential inputs (VIN+, VIN–), where VIN– serves as offset reference and must remain stable within ±0.5 LSB during conversion.

Its serial interface uses CONVST as both start-of-conversion trigger and serial port enable, with DOUT outputting 10-bit straight-binary data on rising SCLK edges following a rising CONVST edge; timing tolerances are specified down to 20 ns for CONVST pulsewidth and 25 ns for SCLK high/low periods at 3 V and 5 V.

Key Specifications

Pinout & Package

AD7810YRM-REEL7 is housed in an 8-lead microSOIC package (RM-8 footprint, 3 mm × 3 mm, 0.65 mm pitch), optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and MAX11100ETE+, the AD7810YRM-REEL7 uniquely combines integrated track-and-hold, wide 2.7–5.5 V supply, and microSOIC-8 size - making it optimal for space- and power-constrained 10-bit measurement where simplicity and robustness outweigh raw speed or extra bits.

Availability

AD7810YRM-REEL7 is available at Aetrix Electronics and suitable for battery-powered test equipment, portable gas detectors, industrial temperature monitors, and low-cost data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7810YRM-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The AD7810 belongs to Analog Devices' precision SAR ADC product line, designed specifically for low-power, space-efficient analog-to-digital conversion in portable and harsh-environment instrumentation where reliability, guaranteed specifications, and minimal external components are essential.

FAQ

What is the guaranteed operating temperature range for the AD7810YRM-REEL7?

The AD7810YRM-REEL7 is fully specified from –40°C to +105°C. All key parameters - including relative accuracy (±1 LSB), differential nonlinearity (±1 LSB), and conversion time (2.3 µs max) - are guaranteed across this extended industrial temperature range, making AD7810YRM-REEL7 suitable for deployment in automotive engine compartments, outdoor environmental sensors, and factory-floor controllers.

Can the AD7810YRM-REEL7 operate without an external voltage reference?

Yes, the AD7810YRM-REEL7 supports internal reference derivation: VREF may be directly connected to VDD, establishing an analog input range of 0 V to VDD. This eliminates the need for an external reference IC, reduces BOM cost and PCB area, and maintains full 10-bit performance - confirmed in the datasheet's "Specifications at 2.7 V to 5.5 V" table and General Description section.

How does the automatic power-down mode work in the AD7810YRM-REEL7?

The AD7810YRM-REEL7 enters automatic power-down mode when CONVST remains low at the end of conversion. It wakes up in ~1.5 µs upon the next rising edge of CONVST, then converts in 2.3 µs. This yields 270 µW at 10 kSPS and 1 µA standby current - verified in the Power Dissipation table and Power vs. Throughput Rate graph (Figure 2). No external control logic is needed; behavior is fully internal and deterministic.

Is the AD7810YRM-REEL7 compatible with standard SPI microcontrollers?

The AD7810YRM-REEL7 uses a 3-wire serial interface (CONVST, SCLK, DOUT) compatible with SPI/QSPI protocols. CONVST acts as chip select and serial enable; data is clocked out on SCLK rising edges. It interfaces directly with PIC16C, QSPI, and SPI masters - though 8051 users must invert SCLK per the Microprocessor Interfacing section. No level shifters or timing adapters are required for 3.3 V or 5 V MCU systems.

What is the maximum recommended source impedance for the analog input of the AD7810YRM-REEL7?

The AD7810YRM-REEL7 analog input has an internal 125 Ω switch resistance and 3.5 pF sampling capacitor. For acquisition time ≤100 ns (guaranteed track/hold settling), source impedance should be ≤2 kΩ. Above that, settling degrades - e.g., at 10 kΩ, acquisition time exceeds 1 µs. The datasheet recommends buffering high-impedance sources and adding a 1 nF capacitor at VIN+ for AC applications to maintain THD performance.