Quad 12-, 14- and 16-Bit Voltage Output SoftSpan DACs with Readback

The LTC2704-16/LTC2704-14/LTC2704-12 are serial input, 12-, 14- or 16-bit, voltage output SoftSpan™ DACs that operate from 3V to 5V logic and ±5V to ±15V analog supplies. SoftSpan offers six output spans—two unipolar and four bipolar—fully programmable through the 3-wire SPI serial interface. INL is accurate to 1LSB (2LSB for the LTC2704-16). DNL is accurate to 1LSB for all versions.

Readback commands allow verification of any on-chip register in just one 24- or 32- bit instruction cycle. All other commands produce a “rolling readback” response from the LTC2704, dramatically reducing the needed number of instruction cycles.

A Sleep command allows any combination of DACs to be powered down. There is also a reset flag and an offset adjustment pin for each channel.

Applications

* Process Control and Industrial Automation

* Direct Digital Waveform Generation

* Software Controlled Gain Adjustment

* Automated Test Equipment

* Six Programmable Output Ranges:

* Unipolar: 0V to 5V, 0V to 10V

* Bipolar: ±5V, ±10V, ±2.5V, –2.5V to 7.5V

* Serial Readback of All On-Chip Registers

* 1LSB INL and DNL Over the Industrial Temperature Range (LTC2704-14/LTC2704-12)

* Force/Sense Outputs Enable Remote Sensing

* Glitch Impulse: < 2nV-sec

* Outputs Drive ±5mA

* Pin Compatible 12-, 14- and 16-Bit Parts

* Power-On and Clear to Zero Volts

* 44-Lead SSOP Package