Analog Devices Inc. AD569KNZ

Overview

AD569KNZ from Analog Devices is a monolithic 16-bit voltage-output digital-to-analog converter (DAC) fabricated in BiMOS II process, delivering guaranteed 16-bit monotonicity, ±0.024% integral nonlinearity (INL), ±1/2 LSB differential nonlinearity (DNL), and 3 µs settling time to ±0.001% of full scale. It operates with ±12 V supplies and supports unipolar/bipolar output ranges up to ±5 V, serving precision closed-loop positioning and high-resolution ADC subsystems.

For engineers reviewing the AD569KNZ datasheet, AD569KNZ pinout, AD569KNZ application, or AD569KNZ equivalent, key selection considerations include its voltage-segmented architecture for temperature-stable monotonicity, Kelvin reference force/sense terminals for gain accuracy under wiring resistance, double-buffered 8-/16-bit bus interface, and MIL-STD-883-compliant K-grade operation from 0°C to +70°C in 28-pin plastic DIP package.

Technical Context

The AD569KNZ implements a two-stage resistor-string subranging architecture: the 8 MSBs select one of 256 segments on the first string, whose endpoints are buffered by high-CMRR amplifiers A1/A2, while the 8 LSBs select a tap on the second string driven by those buffered voltages. This leap-frog buffer topology guarantees monotonicity across segment boundaries despite amplifier offset.

Its multiplying DAC transfer function V_OUT = D·V_REF supports both DC and AC references, with dedicated +VREF Force/Sense and –VREF Force/Sense pins enabling <10 µV offset drift contribution from PCB trace resistance. The on-chip output buffer delivers ±5 V into 1 kΩ and drives up to 1000 pF capacitive loads without instability.

Key Specifications

Pinout & Package

AD569KNZ is packaged in a 28-pin plastic DIP (N-28) with 0.6-inch width and through-hole mounting. Pin functions are validated per Analog Devices AD569 datasheet Rev. A (1993), including dual-reference Kelvin terminals and TTL/CMOS-compatible control inputs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit voltage-output DAC applications.

Compared with AD569KNZ, AD568KN trades 2 bits of resolution and relaxed INL for lower cost and power, while AD768AN achieves superior linearity at the expense of increased BOM count, PCB area, and design complexity due to external buffering and no Kelvin reference support.

Availability

AD569KNZ is available at Aetrix Electronics and suitable for robotics position control, closed-loop servo systems, high-resolution data acquisition, military-grade test equipment, and precision calibration instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD569KNZ 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 AD569 belongs to Analog Devices' precision DAC product line, designed specifically for applications demanding guaranteed monotonicity, low drift, and Kelvin-referenced accuracy in industrial automation, aerospace, and test & measurement systems.

FAQ

What is the guaranteed integral nonlinearity specification for AD569KNZ at +25°C?

The AD569KNZ has a guaranteed integral nonlinearity (INL) of ±0.024% full-scale range (FSR) at +25°C, corresponding to ±1.2 mV error in a ±5 V output span. This specification is tested on all production units during final electrical test and reflects the device's voltage-segmented architecture that maintains monotonicity across temperature and time. The AD569KNZ datasheet confirms this value under typical operating conditions (+VS = +12 V, –VS = –12 V, +VREF = +5 V, –VREF = –5 V).

Does AD569KNZ support both unipolar and bipolar output configurations?

Yes, AD569KNZ supports both unipolar and bipolar output configurations through its dual-reference input structure. With +VREF = +5 V and –VREF = 0 V, it delivers 0 V to +10 V unipolar output; with +VREF = +5 V and –VREF = –5 V, it delivers –5 V to +5 V bipolar output. The AD569KNZ uses offset-binary coding, so digital code 0000H yields –VREF and FFFFH yields +VREF. Its Kelvin force/sense terminals preserve accuracy in both modes despite PCB trace resistance.

What package type and pin count does AD569KNZ use?

AD569KNZ is supplied in a 28-pin plastic dual in-line package (DIP) with 0.6-inch body width and through-hole mounting. The "N" suffix in KNZ denotes the N-28 package variant, confirmed in the AD569 ordering guide. This package includes dedicated pins for +VREF Force/Sense (Pins 3/2), –VREF Force/Sense (Pins 15/16), analog ground (Pin 18), and dual supply rails (Pins 1 and 28), enabling precise layout for high-accuracy applications.

How does the AD569KNZ achieve guaranteed 16-bit monotonicity?

AD569KNZ achieves guaranteed 16-bit monotonicity through its voltage-segmented architecture with leap-frog buffer amplifiers. The 8 MSBs select one of 256 resistor string segments, and high-CMRR buffers A1/A2 connect to segment endpoints-jumping across boundaries to avoid discontinuities caused by amplifier offset. This topology ensures output never decreases with increasing digital code, even over –55°C to +125°C, as verified in AD569KNZ production testing per MIL-STD-883 requirements.

Can AD569KNZ operate with an AC reference signal for waveform generation?

Yes, AD569KNZ is explicitly designed as a multiplying DAC and fully supports AC reference signals for precision waveform synthesis. Its multiplying feedthrough error remains below –100 dB up to 10 kHz when referenced to a 1 V rms sine wave, as measured in the AD569KNZ AC performance section. The device maintains 16-bit resolution and low glitch impulse (500 nV-sec typ) under these conditions, making it suitable for function generators and arbitrary waveform applications requiring clean spectral purity.