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Quad Current Output 14-Bit SoftSpan DACs with Parallel I/O
Linear Technology Inc.
Description
The LTC2755 is a family of quad 12-, 14-, and 16-bit multiplying parallel-input, current-output DACs. These DACs operate from a single 2.7V to 5.5V supply and are all guaranteed monotonic over temperature. The LTC2755A-16 provides 16-bit performance (±1LSB INL and DNL) over temperature without any adjustments. These SoftSpan DACs offer six output ranges—two unipolar and four bipolar—that can be programmed through the parallel interface, or pinstrapped for operation in a single range. The LTC2755 DACs use a bidirectional input/output parallel interface that allows readback of any internal register, including the DAC output span settings. A power-on reset circuit resets the DAC outputs to 0V when power is initially applied. A logic low on the CLR pin asynchronously clears the DACs to 0V in any output range. The parts are speci?ed over commercial and industrial temperature ranges.
Features
Program or Pin-Strap Six Output Ranges Unipolar: 0V to 5V, 0V to 10V Bipolar: ±5V, ±10V, ±2.5V, –2.5V to 7.5V Maximum 16-Bit INL Error: ±1 LSB over Temperature Low 1μA (Maximum) Supply Current Guaranteed Monotonic over Temperature Low Glitch Impulse 1nV•s 2.7V to 5.5V Single Supply Operation 2μs Settling Time to ±1 LSB Parallel Interface with Readback of All Registers Asynchronous CLR Pin Clears DAC Outputs to 0V in Any Output Range Power-On Reset to 0V 64-Pin 9mm x 9mm QFN Package
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