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Product Detailed Parameters
- Description：IC DAC 8BIT V-OUT 20TSSOP
- 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-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：20-TSSOP
- Mounting Type：Surface Mount
- Grade：-
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Overview
The AD7302BRU is a dual, 8-bit voltage output digital-to-analog converter (DAC) from Analog Devices. It operates on a single +2.7 V to +5.5 V supply and features on-chip precision output buffers that allow rail-to-rail voltage swing. The device utilizes a parallel microprocessor and DSP-compatible interface with high-speed registers and double-buffered logic. Data loads on the rising edge of CS or WR, while the A/B pin selects DAC A or B. It supports internal reference derived from VDD or external reference at REFIN. Both DACs update simultaneously via asynchronous LDAC and clear via CLR. Power consumption is typically 15 mW at 5 V, reducing to under 3 μW in power-down mode.
Feature Summary
- Dual 8-bit DACs with rail-to-rail output buffers in a 20-lead TSSOP package
- Parallel interface compatible with standard microprocessors and DSPs
- Internal or external reference capability with 1.0 V to VDD/2 input range
- Power-down mode reduces current consumption to less than 1 μA max
Applications
- Portable battery-powered instruments
- Digital gain and offset adjustment circuits
- Programmable voltage and current sources
- Programmable attenuators
Procurement Notes
Verify the specific suffix 'RU' corresponds to the 20-lead Thin Shrink Small Outline Package (TSSOP). Confirm the temperature grade 'B' indicates operation from –40 °C to +105 °C. Ensure the datasheet revision matches the required timing specifications for your system design.
Selection Notes
Select this component when a dual-channel, low-power, 8-bit DAC with parallel interface is required. It is suitable for single-supply applications ranging from 2.7 V to 5.5 V. Consider the 1.2 μs typical settling time and ±1 LSB linearity for precision requirements. Verify if simultaneous update capability via LDAC is necessary for multi-channel synchronization.
Part Context
The AD7302BRU belongs to the AD7302 family of dual 8-bit DACs. The 'B' suffix denotes the commercial temperature range of –40 °C to +105 °C. The 'RU' suffix specifies the 20-lead TSSOP package option. Other package variants include DIP (BN) and SOIC (BR).
Replacement Considerations
Check for direct pin-compatible alternatives within the Analog Devices portfolio that offer similar resolution and interface types. Verify that any substitute maintains the same 2.7 V to 5.5 V operating voltage and rail-to-rail output characteristics.
