Analog Devices Inc. AD7813YN

Overview

AD7813YN from Analog Devices is a 10-bit successive approximation analog-to-digital converter (ADC) with 400 kSPS maximum throughput, on-chip track-and-hold and internal clock oscillator, operating from a single 2.7 V to 5.5 V supply. It delivers ±1 LSB relative accuracy, 58 dB SNR at 30 kHz input, and 2.3 µs conversion time - used in portable data acquisition systems requiring low-power, microprocessor-compatible digitization of analog sensor signals.

For engineers reviewing the AD7813YN datasheet, AD7813YN pinout, AD7813YN application, or AD7813YN equivalent, key selection considerations include its dual-read 8-bit+2-bit parallel interface, automatic power-down mode (34.6 µW @ 1 kSPS), 0 V to VREF analog input range, reference voltage flexibility (1.2 V to VDD), and plastic DIP-16 package compatibility with legacy industrial control and test equipment designs.

Technical Context

The AD7813YN implements a charge redistribution DAC architecture with internal 2.3 µs successive approximation conversion cycle and 100 ns track/hold acquisition time. Its timing is controlled solely by the CONVST signal, which triggers both power-up (1.5 µs) and conversion initiation, with BUSY indicating active conversion state.

It supports two operational modes: Mode 1 (continuous high-speed sampling ≥100 kSPS) and Mode 2 (automatic power-down between conversions), where logic level on CONVST at BUSY falling edge determines mode selection. The 10-bit result is accessed via two sequential 8-bit reads - first for MSBs, second placing LSBs on DB7–DB6 with DB5–DB0 = 0.

Key Specifications

Pinout & Package

AD7813YN is housed in a 16-lead, 0.3" wide plastic dual-in-line package (DIP), compatible with through-hole PCB assembly and legacy socketing. Pin spacing is 0.1" (2.54 mm), body width 0.3", and lead count matches functional I/O requirements without redundancy.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7813YN, AD7812YN sacrifices 2 bits of resolution but retains identical footprint and power profile, while ADS7822U trades parallel simplicity for higher resolution and serial interface - making AD7813YN uniquely balanced for legacy microprocessor-based 10-bit systems needing minimal BOM or layout change.

Availability

AD7813YN is available at Aetrix Electronics and suitable for portable instrumentation, industrial PLC analog input modules, and medical patient monitors requiring stable component supply with long-term manufacturability and temperature-rated performance.

Supply support for AD7813YN 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing ICs for precision measurement and control applications.

The AD7813YN belongs to Analog Devices' legacy SAR ADC product line, designed specifically for microprocessor-centric data acquisition systems demanding low power, single-supply operation, and easy parallel interfacing in industrial and portable environments.

FAQ

What is the maximum sampling rate supported by the AD7813YN?

The AD7813YN supports a maximum throughput of 400 kSPS, achievable only in Mode 1 (high-speed continuous sampling). This requires maintaining CONVST high between conversions to prevent automatic power-down. At lower rates, Mode 2 reduces power consumption but limits sustained throughput due to power-up overhead.

How is the 10-bit result read from the AD7813YN?

The AD7813YN outputs its 10-bit result using two sequential 8-bit reads: the first read places the 8 most significant bits (MSBs) on DB0–DB7; the second read places the 2 least significant bits (LSBs) on DB7 and DB6, with DB5–DB0 forced to logic zero. Both reads require CS and RD low during the valid timing window defined in the datasheet.

Does the AD7813YN require an external clock source?

No, the AD7813YN contains an on-chip clock oscillator and does not require an external clock. All timing - including conversion, power-up, and BUSY assertion - is derived from this internal oscillator synchronized to the CONVST signal, simplifying system-level timing design.

What is the operating temperature range of the AD7813YN?

The AD7813YN is specified for operation from –40°C to +105°C, meeting industrial and extended commercial requirements. All key parameters - including ±1 LSB relative accuracy, 58 dB SNR, and 2.3 µs conversion time - are guaranteed across this full range, enabling deployment in harsh environments.

Can the AD7813YN operate with a 3.3 V supply?

Yes, the AD7813YN operates across 2.7 V to 5.5 V, including standard 3.3 V supplies. At VDD = 3 V, it consumes 10.5 mW in normal operation and achieves 34.6 µW average power at 1 kSPS in automatic power-down mode - making it well-suited for 3.3 V embedded systems.