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Product Detailed Parameters
- Description：IC DAC 8BIT V-OUT 18SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：8
- Number of D/A Converters：1
- Settling Time：20µs
- Output Type：Voltage - Buffered
- Differential Output：No
- Data Interface：Parallel
- Reference Type：External
- Voltage - Supply, Analog：11.4V ~ 16.5V, ±5V
- Voltage - Supply, Digital：14.25V ~ 15.75V
- INL/DNL (LSB)：±0.5 (Max), ±1 (Max)
- Architecture：R-2R
- Operating Temperature：-40°C ~ 85°C
- Package / Case：18-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：18-SOIC
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
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Overview
The AD7224LRZ-18 is an 8-bit voltage-output digital-to-analog converter (DAC) with integrated output amplifiers, fabricated in Analog Devices' LC2MOS process. It operates from a single +15 V supply or dual supplies (+15 V / -5 V). Key electrical parameters include a total unadjusted error of ±1 LSB maximum over the temperature range, a settling time of 5 μs for positive full-scale changes, and a slew rate of 2.5 V/μs minimum. The device features double-buffered inputs, TTL/CMOS compatibility, and requires no external trims.
Feature Summary
- Integrated 8-bit DAC and unity-gain output amplifier on a monolithic CMOS chip
- Low total unadjusted error of ±1 LSB maximum over the operating temperature range
- Double-buffered interface logic allows simultaneous updates in multi-DAC systems
- Operates with single (+15 V) or dual (+15 V/-5 V) power supplies
Applications
- Microprocessor-based data acquisition systems
- Programmable gain amplifiers
- Waveform generation circuits
- Battery-powered instrumentation
Procurement Notes
Verify the specific suffix 'R-18' corresponds to the 18-lead SOIC package option when sourcing. Confirm the 'L' designation indicates the extended accuracy grade (±1 LSB max) rather than the standard grade. Ensure the supplier provides documentation confirming the -40°C to +85°C commercial temperature range associated with this model variant.
Selection Notes
Select the AD7224LRZ-18 when a low-power, single-supply 8-bit DAC with built-in buffering is required. The 'L' version offers tighter accuracy specifications compared to the 'K' version. Consider the R-18 package for surface-mount applications requiring an 18-pin footprint. Verify that the system reference voltage remains within the +2 V to +12.5 V range for specified performance.
Part Context
The AD7224 series belongs to Analog Devices' family of precision CMOS DACs utilizing LC2MOS technology. This process integrates high-speed digital logic with precision analog circuits on a single chip. The LRZ-18 variant specifically denotes the commercial temperature range (-40°C to +85°C), the ±1 LSB accuracy grade, and the 18-lead SOIC package configuration.
Replacement Considerations
Direct pin-compatible replacements within the same accuracy grade include the AD7224LP (PLCC package) and AD7224LN (Plastic DIP package). For higher accuracy requirements, consider the AD7224UQ or AD7224CQ variants which offer similar performance in different packages.
