AD7305:  +3V/+5V, Rail-to-Rail Quad, 8-Bit DAC Parallel-IN

The AD7304/AD7305 are quad, 8-bit DACs that operate from a single +3 V to +5 V supply or ±5 V supplies. The AD7304 has a serial interface, while the AD7305 has a parallel interface. Internal ...More

AD7305:  +3V/+5V, Rail-to-Rail Quad, 8-Bit DAC Parallel-IN

Product Description

The AD7304/AD7305 are quad, 8-bit DACs that operate from a single +3 V to +5 V supply or ±5 V supplies. The AD7304 has a serial interface, while the AD7305 has a parallel interface. Internal precision buffers swing rail-to-rail. The reference input range includes both supply rails allowing for positive or negative full-scale output voltages. Operation is guaranteed over the supply voltage range of +2.7 V, +5.5 V to ±5 V consuming less than 9 mW from a +3 V supply. The full-scale voltage output is determined by the external reference input voltage applied. The rail-to-rail VREF input to DAC VOUT allows for a full-scale voltage set equal the positive supply VDD, the negative supply VSS or any value in between.

The AD7304's doubled-buffered serial-data interface offers high-speed, three-wire, SPI and micro controller compatible inputs using data in (SDI), clock (CLK) and chip select (CS) pins.

The parallel input AD7305 uses a standard address decode along with the WR control line to load data into the input registers. The double buffered architecture allows all four input registers to be preloaded with new values followed by a LDAC control strobe which copies all the new data into the DAC registers thereby updating the analog output values. The AD7305 is pin-compatible with the popular industry standard AD7226 when operating from less than +5.5 V.

An internal power ON reset places both parts in the zero-scale state at turn ON. A 40 µA power shutdown (SHDN) feature is activated on both parts by tri-stating the SDI/SHDN pin on the AD7304, and tri-stating the A0/SHDN address pin on the AD7305. The AD7304/AD7305 are specified over the extended industrial (-40°C to +85°C), and the automotive (-40°C to +125°C) temperature ranges.

Features

  • Four 8-Bit DACs in One Package
  • +3 V, +5 V, and ±5 V Operation
  • Rail-to-Rail REF Input to Voltage Output Swing
  • Compact 1.1 mm Height TSSOP 16-/20-Lead Package
  • 2.6 MHz Reference Multiplying Bandwidth
  • Internal Power-On Reset
  • SPI Serial Interface Compatible - AD7304
  • Fast Parallel Interface - AD7305
  • 40 µA Power Shutdown

Diagrams

AD7305 Diagram
Functional Block Diagram for AD7305

Характеристики

Resolution (Bits) 8bit
DAC Update Rate 1MSPS
DAC Settling Time 1µs
# DAC Outputs 4
DAC Type Voltage Out
DAC Input Format Par
Output FSR (Bip Vref),(Uni Vref)
Ref Int/Ext Ext
Supply Vnom Dual(+5, -5),Single(+3),Single(+3.3),Single(+5)
Pwr Diss (Max) 60mW
Package DIP,SOIC,SOP

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Получать уведомление о новинках More
Part# Res (bits) Update Rate Settling Time # Outputs
AD7304 8 1MSPS 1µs 4
AD7305 8 1MSPS 1µs 4
ADV7120 8 80MSPS 12ns 3
ADV7129 8 360MSPS 25ns 3
AD9709 8 125MSPS 35ns 2
AD7528 8 5.6MSPS 180ns 2
AD7628 8 2.9MSPS 350ns 2