Texas Instruments

Mixed Signal & Analog Showcase
Blue Band

Mixed Signal & Analog Showcase

Inside

10-bit serial DAC features high-speed and low power

Product Features

  • 10-Bit serial CMOS DAC with voltage output
  • 5-V single-supply operation
  • Low power 1.75 mW Max
  • 1.21 MHz input data update rate (@ 20 MHz SCLK)
  • High-impedance reference inputs
  • 3-Wire serial interface with data read-back
  • Available in commercial (0°C to 70°C) and industrial (-40°C to 85°C)

The TLC5615 is a 10-bit DAC operating from a single 5-V supply and consumes only 1.75 mW (max). The device features an input data update rate of 1.21 MHz when operating at a clock speed of 20 MHz and a settling time of 12.5 µs (to 0.5 LSB). The maximum integral nonlinearity (INL) of ±1 LSB and a maximum differential nonlinearity (DNL) of ±0.9 LSB ensure monotonicity over temperature. The output amplifier has a gain of 2, therefore the 16-bit digital control word determines a 10-bit analog output ranging between 0 and a nominal full-scale value of 2X the input reference voltage.

Utilizing a simple CMOS compatible three-wire interface, the TLC5615 is easy to interface with TMS320 DSPs as illustrated below. An additional digital output (DOUT) enables multiple TLC5615s to be daisy chained or digital data to be read-back to the processor (four-wire communication). Supported protocols include the SPI™, QSPI™ and Microwire™ standards.

Typical applications for the TLC5615 include digital offset and gain adjustment, remote industrial controls, motion control devices, cellular telephones and battery powered test instruments.

It is an improved pin-compatible version of the Maxim MAX515 with a buffered reference input to reduce the need of controlling source impedance.

The TLC5615 is offered in a small eight-pin SOIC package or a regular eight-pin PDIP package.

(c) Copyright 1996 Texas Instruments Incorporated. All rights reserved.
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