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Product Detailed Parameters
- Description：IC DAC 8BIT V-OUT 20DIP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube,Tube
- Number of Bits：8
- Number of D/A Converters：2
- Settling Time：2µs
- Output Type：Voltage - Buffered
- Differential Output：No
- Data Interface：Parallel
- Reference Type：External
- Voltage - Supply, Analog：2.7V ~ 5.5V
- Voltage - Supply, Digital：2.7V ~ 5.5V
- INL/DNL (LSB)：±1 (Max), ±1 (Max)
- Architecture：Current Source
- Operating Temperature：-40°C ~ 105°C
- Package / Case：20-DIP (0.300", 7.62mm)
- Supplier Device Package：20-PDIP
- Mounting Type：Through Hole
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Overview
The AD7302BN is a dual, 8-bit voltage output digital-to-analog converter (DAC) operating from a single +2.7 V to +5.5 V supply. It features on-chip precision output buffers enabling rail-to-rail operation with a typical settling time of 1.2 μs. The device utilizes a parallel microprocessor and DSP-compatible interface with double-buffered logic for simultaneous or individual DAC updates. Reference selection supports internal generation from VDD/2 or external input at the REFIN pin. Power consumption is typically 15 mW at 5 V, reducing to less than 1 μA in power-down mode. It is housed in a 20-lead plastic DIP package.
Feature Summary
- Dual 8-bit DACs with rail-to-rail output capability
- Parallel interface with double-buffered registers
- Internal or external reference selection
- Power-down mode consuming <1 μA
Applications
- Portable battery-powered instruments
- Digital gain and offset adjustment circuits
- Programmable voltage and current sources
- Programmable attenuators
Procurement Notes
Verify the ordering suffix 'N' corresponds to the 20-lead Plastic DIP package as specified in the Analog Devices data sheet. Confirm the temperature range is B Version (-40°C to +105°C). Ensure compatibility with single-supply operations between 2.7 V and 5.5 V. Check for ESD sensitivity precautions during handling.
Selection Notes
Select this component when dual independent 8-bit outputs are required in a single package. It is suitable for applications needing rail-to-rail swing without external amplifiers. Consider the 1.2 μs settling time for speed requirements. Verify that the parallel interface timing meets the system's microprocessor or DSP constraints.
Part Context
The AD7302BN belongs to the AD7302 family of dual 8-bit DACs. Variants include the BR (SOIC) and BRU (TSSOP) packages. All variants share identical electrical specifications and functionality, differing only in physical packaging. The BN designation specifically indicates the through-hole plastic DIP form factor.
Replacement Considerations
Direct pin-compatible replacements within the same family include AD7302BR (SOIC) and AD7302BRU (TSSOP). Cross-package substitution requires PCB footprint modification. No other manufacturers' parts are confirmed as direct substitutes in the provided documentation.
