Monolithic Power Systems Inc. MEZDPD1620AS-84D1

Overview

MEZDPD1620AS-84D1 from MEZ is a surface-mount, 16-channel, 20-bit digital-to-analog converter (DAC) with serial SPI interface, ±1 LSB INL, 1 ppm/°C temperature coefficient, and integrated reference buffer - used in precision industrial process control and automated test equipment.

For engineers reviewing the MEZDPD1620AS-84D1 datasheet, MEZDPD1620AS-84D1 pinout, MEZDPD1620AS-84D1 application, or MEZDPD1620AS-84D1 equivalent, key selection factors include channel count, monotonicity guarantee, reference voltage range (2.5 V), output settling time (10 µs), and SPI timing compliance at 50 MHz.

Technical Context

This DAC implements a segmented R-2R ladder architecture with on-chip 2.5 V reference and programmable gain amplifier. It supports daisy-chain mode for multi-DAC synchronization and features independent channel power-down control per register.

Operation requires 3-wire SPI (CS, SCLK, SDI) with frame sync support and includes CRC-8 error detection on write commands. Output voltage range is configurable from 0–2.5 V to 0–10 V via external resistor networks.

Key Specifications

Pinout & Package

MEZDPD1620AS-84D1 is housed in a 84-pin LQFP package (12 mm × 12 mm, 0.5 mm pitch) with exposed thermal pad for enhanced thermal dissipation in continuous-output applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multichannel precision DAC applications.

Compared with AD5761RBRUZ and DAC8775IPWPR, MEZDPD1620AS-84D1 uniquely combines 20-bit resolution, 16-channel density, per-channel power control, and daisy-chain SPI - making it optimal for space-constrained, high-channel-count precision systems requiring deterministic update timing and long-term stability.

Availability

MEZDPD1620AS-84D1 is available at Aetrix Electronics and suitable for industrial process controllers, automated test equipment, medical imaging calibration systems, and high-accuracy data acquisition modules requiring stable component supply and long-term design-in support.

Supply support for MEZDPD1620AS-84D1 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

MEZ is a Japanese semiconductor manufacturer specializing in high-precision analog and mixed-signal ICs for industrial and scientific instrumentation.

The MEZDPD series targets multichannel, high-resolution digital-to-analog conversion in metrology, calibration, and closed-loop control systems where long-term drift and code-to-code linearity are critical.

FAQ

What is the maximum SPI clock frequency supported by MEZDPD1620AS-84D1?

The device supports SPI clock rates up to 50 MHz, verified across −40°C to +105°C and 3.3 V ±5 % supply. This allows full 32-bit command writes in under 640 ns, enabling tight timing control in synchronized multi-DAC systems.

Does MEZDPD1620AS-84D1 require an external reference voltage?

No. It integrates a 2.5 V, low-drift reference with 10 ppm/°C max temperature coefficient and 10 µV p-p noise. The REFIN/REFOUT pin can serve as a buffered reference source for other components, eliminating external reference ICs.

How does the LDAC pin function in synchronous multi-channel operation?

Asserting LDAC latches all 16 channel registers simultaneously, ensuring glitch-free, zero-skew analog output updates. It operates independently of SPI activity and supports both hardware-triggered and software-controlled update modes.

Can MEZDPD1620AS-84D1 operate with 1.8 V digital I/O?

Yes. The VIO pin accepts 1.8 V or 3.3 V, allowing direct interfacing with low-voltage FPGAs and microcontrollers without level-shifting. Digital timing parameters remain valid across both supply options per datasheet Table 6.

Is daisy-chain mode compatible with CRC-8 error checking?

Yes. Each device in the daisy-chain validates its own 32-bit command with CRC-8 before forwarding remaining bits. This preserves error detection integrity across all chain positions without requiring master-side re-computation.

What thermal performance is specified for the 84-pin LQFP package?

The package has θ_JA = 32°C/W and θ_JC = 4.2°C/W (with 1-in² 2-oz copper pad). At full 16-channel 10 V output, junction temperature rise remains below 25°C above ambient, supporting continuous operation in sealed enclosures.