Analog Devices Inc. AD7819YRUZ

Overview

AD7819YRUZ from Analog Devices is an 8-bit, 200 kSPS successive approximation ADC with on-chip track-and-hold, 4.5 µs conversion time, and 8-bit parallel interface - designed for microprocessor- and DSP-connected data acquisition in industrial control and portable instrumentation.

For engineers reviewing the AD7819YRUZ datasheet, AD7819YRUZ pinout, AD7819YRUZ application, or AD7819YRUZ equivalent, this page delivers verified specifications, TSSOP-16 package mapping, real-world timing behavior (t_CONV = 4.5 µs, t_POWER-UP = 1.5 µs), power-down mode operation at 57.75 µW @ 1 kSPS, and validated alternative options for embedded analog front-end design.

Technical Context

The AD7819YRUZ implements a charge redistribution DAC architecture with internal clock oscillator and three-state TTL-compatible digital outputs. Its conversion cycle begins on the falling edge of CONVST and completes within 4.5 µs, after which BUSY goes low and data is latched into the output register.

It supports two operational modes: Mode 1 (continuous high-speed sampling up to 200 kSPS) and Mode 2 (automatic power-down between conversions), where power-up occurs only on rising edge of CONVST and power-down is triggered by logic-low CONVST at end-of-conversion - enabling 57.75 µW average consumption at 1 kSPS.

Key Specifications

Pinout & Package

AD7819YRUZ is packaged in a 16-lead narrow-body thin shrink small outline package (TSSOP), pin-compatible with AD7819YR (SOIC) and AD7819YN (DIP), with 0.65 mm lead pitch and exposed pad not connected internally.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit SAR ADC applications.

Compared with AD7819YRUZ, AD7820BRZ offers lower cost but sacrifices power efficiency and ease of microprocessor interfacing, while MAX1112CPE+ trades parallel simplicity for serial flexibility and lower static power - making AD7819YRUZ optimal for interrupt-driven, low-latency, 8-bit parallel embedded systems.

Availability

AD7819YRUZ is available at Aetrix Electronics and suitable for industrial process monitoring, portable data loggers, motor control feedback, and medical vital sign acquisition requiring stable component supply and long-term manufacturability.

Supply support for AD7819YRUZ 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 AD7819YRUZ belongs to Analog Devices' precision SAR ADC product line, engineered for microprocessor-coupled data acquisition where speed, low power, and parallel simplicity are essential in industrial and portable instrumentation.

FAQ

What is the maximum sampling rate supported by the AD7819YRUZ?

The AD7819YRUZ achieves a maximum throughput of 200 kSPS in Mode 1 (high-speed continuous sampling), where it remains powered up between conversions. This requires strict adherence to timing constraints: minimum 4.5 µs conversion time plus read setup/hold margins. At lower rates, Mode 2 power-down reduces average power but limits sustained throughput.

Does the AD7819YRUZ require an external clock source?

No, the AD7819YRUZ includes an on-chip clock oscillator, eliminating the need for an external clock. The internal oscillator ensures consistent 4.5 µs conversion time across voltage and temperature variations. External timing is managed solely via the CONVST, CS, and RD control lines - simplifying system design and reducing BOM count.

How does the automatic power-down mode work in the AD7819YRUZ?

In Mode 2, the AD7819YRUZ powers down automatically at the end of each conversion when CONVST is held low, then powers up again on the next rising edge of CONVST. This reduces average power to 57.75 µW at 1 kSPS. Power-up time is fixed at 1.5 µs, so the external CONVST pulse must accommodate this delay before initiating conversion.

What is the analog input voltage range for the AD7819YRUZ?

The AD7819YRUZ accepts analog inputs from 0 V to VREF, where VREF is externally supplied to Pin 1 and must be between 1.2 V and VDD. If VREF is tied to VDD (e.g., 3.3 V), the input range becomes 0 V to 3.3 V. Input overvoltage beyond VDD + 0.3 V or below –0.3 V risks damage due to ESD diode conduction.

Is the AD7819YRUZ pin-compatible with other packages in the AD7819 family?

Yes, the AD7819YRUZ (TSSOP-16), AD7819YR (SOIC-16), and AD7819YN (PDIP-16) share identical pinout and electrical specifications. All three use the same 16-pin numbering scheme: VREF (1), VIN (2), GND (3), CONVST (4), CS (5), RD (6), BUSY (7), DB0–DB7 (8–15), VDD (16). Layout migration between packages is feasible with footprint adaptation only.