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Product Detailed Parameters
- Description：IC DAC 18BIT 20TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：18
- Number of D/A Converters：1
- Settling Time：1µs
- Output Type：Voltage - Unbuffered
- Differential Output：Yes
- Data Interface：SPI
- Reference Type：External
- Voltage - Supply, Analog：2.7V ~ 5.5V
- Voltage - Supply, Digital：2.7V ~ 5.5V
- INL/DNL (LSB)：±0.5 (Max), ±0.5 (Max)
- Architecture：-
- Operating Temperature：-55°C ~ 125°C
- Package / Case：20-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：20-TSSOP
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
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Overview
The AD5781SRUZ-EP is a single-channel, true 18-bit voltage output digital-to-analog converter (DAC) designed for high-precision applications. It features ±0.5 LSB integral nonlinearity (INL) and differential nonlinearity (DNL), ensuring monotonic operation. The device operates with bipolar analog supplies ranging from ±2.5 V to ±16.5 V and supports a total span of up to 33 V. Digital interfaces include SPI, QSPI, Microwire, and DSP standards via a 3-wire serial connection capable of 35 MHz clock rates. Key electrical parameters include a 1 µs settling time, 7.5 nV/√Hz noise spectral density, and a glitch impulse of 1.4 nV-sec.
Feature Summary
- True 18-bit resolution with ±0.5 LSB INL and DNL specifications
- Wide bipolar power supply range supporting up to ±16.5 V
- Enhanced Product (EP) qualification for defense and aerospace environments
- Extended military temperature range from −55°C to +125°C
Applications
- Medical instrumentation
- Test and measurement equipment
- Industrial control systems
- Scientific and aerospace instrumentation
- Data acquisition systems
Procurement Notes
Verify the specific suffix 'SRUZ-EP' against the manufacturer's current ordering guide to confirm package type and enhanced product status. Ensure compatibility with AQEC standards if required for defense or aerospace procurement. Confirm availability through authorized Analog Devices distributors as EP parts may have distinct supply chain requirements compared to commercial variants.
Selection Notes
Select this component when high accuracy and wide voltage swings are required in harsh environments. The unbuffered output requires external amplification for low-impedance loads. Verify that the system interface supports the 3-wire serial protocol at speeds up to 35 MHz. Consider the ±0.5 ppm/°C temperature drift for applications requiring long-term stability without frequent recalibration.
Part Context
The AD5781SRUZ-EP belongs to the AD5781 family of precision DACs. The '-EP' suffix denotes an Enhanced Product variant manufactured under controlled baselines for reliability. This version shares core specifications with the standard AD5781 but includes additional qualification data and manufacturing controls suitable for critical applications.
Replacement Considerations
The standard AD5781ARUZ offers identical electrical performance but lacks the enhanced product manufacturing controls. For higher resolution needs, consider the AD5791, which provides 20-bit accuracy.
