AD7302:  2.7 V to 5.5 V, Parallel Input Dual Voltage Output 8-Bit DAC

The AD7302 is a dual, 8-bit voltage out DAC that operates from a single +2.7 V to +5.5 V supply. Its on-chip precision output buffers allow the DAC outputs to swing rail to rail. The AD7302 has a ...More

AD7302:  2.7 V to 5.5 V, Parallel Input Dual Voltage Output 8-Bit DAC

Product Description

The AD7302 is a dual, 8-bit voltage out DAC that operates from a single +2.7 V to +5.5 V supply. Its on-chip precision output buffers allow the DAC outputs to swing rail to rail. The AD7302 has a parallel microprocessor and DSP-compatible interface with high speed registers and double buffered interface logic. Data is loaded to the registers on the rising edge of CS or WR and the A/B pin selects either DAC A or DAC B.

Reference selection for AD7302 can be either an internal reference derived from the VDD or an external reference applied at the REFIN pin. Both DACs can be simultaneously updated using the asynchronous LDAC input and can be cleared by using the asynchronous CLR input.

The low power consumption of this part makes it ideally suited to portable battery operated equipment. The power consumption is less than 10 mW at 3.3 V, reducing to 3 µW in powerdown mode.

The AD7302 is available in a 20-pin plastic dual-in-line package, 20-lead SOIC and a 20-lead TSSOP package.

Features

  • Two 8-Bit DACs in One Package
  • 20-Lead DIP/SOIC/TSSOP Package
  • +2.7 V to +5.5 V Operation
  • Internal and External Reference Capability
  • DAC Power-Down Function
  • Parallel Interface
  • On-Chip Output Buffer Rail-to-Rail Operation
  • Low power Operation 3 mA max @ 3.3 V
  • Power-Down to 1 µA max @ 25°C

Diagrams

AD7302 Diagram
Functional Block Diagram for AD7302

Specifications

Resolution (Bits) 8bit
DAC Update Rate 833kSPS
DAC Settling Time 1.2µs
# DAC Outputs 2
DAC Type Voltage Out
DAC Input Format Par
Output FSR (Uni Vdd),(Uni Vdd/2),(Uni Vref)
Ref Int/Ext Int/Ext
Supply Vnom Single(+3),Single(+3.3),Single(+5)
Pwr Diss (Max) 24.8mW
Package DIP,SOIC,SOP

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Part# Res (bits) Update Rate Settling Time # Outputs
AD7628 8 2.9MSPS 350ns 2
AD9709 8 125MSPS 35ns 2
AD7302 8 833KSPS 1.2µs 2
AD7303 8 833KSPS 1.2µs 2
AD5428 8 21.3MSPS 30ns 2
AD5429 8 2.47MSPS 30ns 2
AD7528 8 5.6MSPS 180ns 2
AD557 8 1.25MSPS 800ns 1