Dual 16-Bit Soft-Span I DACs

The LTC2752 is a dual 16-bit multiplying serial-input, current-output digital-to-analog converter. It operates from a single 3V to 5V supply and is guaranteed monotonic over temperature. The LTC2752A provides full 16-bit performance (±1LSB INL and DNL, max) over temperature without any adjustments. This SoftSpan™ DAC offers six output ranges (up to ±10V) that can be programmed through the 3-wire SPI serial interface, or pinstrapped for operation in a single range.

Any on-chip register (including DAC output-range settings) can be read for verification in just one instruction cycle; and if you change register content, the altered register will be automatically read back during the next instruction cycle.

Voltage-controlled offset and gain adjustments are also provided; and the power-on reset circuit and CLR pin both reset the DAC outputs to 0V regardless of output range.

Applications

* High Resolution Offset and Gain Adjustment

* Process Control and Industrial Automation

* Automatic Test Equipment

* Data Acquisition Systems

* Program or Pin-Strap Six Output Ranges

0V to 5V, 0V to 10V, –2.5V to 7.5V, ±2.5V, ±5V, ±10V

* Maximum 16-Bit INL Error: ±1 LSB over Temperature

* Guaranteed Monotonic over Temperature

* Glitch Impulse 0.6nV•s (3V), 2.2nV•s (5V)

* Serial Readback of All On-Chip Registers

* 1μA Maximum Supply Current

* 2.7V to 5.5V Single-Supply Operation

* 16-Bit Settling Time: 2μs

* Voltage-Controlled Offset and Gain Trims

* Clear and Power-On-Reset to 0V Regardless of Output Range

* 48-Pin 7mm × 7mm LQFP Package