●The DAC1280 is a very low distortion digital-to-analog converter (DAC) suited for performance testing of seismic equipment. The DAC1280 provides a high-accuracy output signal from a bitstream input. The device achieves very high linearity in a small package while dissipating only 18mW. Together with the high-performance ADS1281 and ADS1282 analog-to-digital converters (ADCs), these devices create a test and measurement system that meets the exacting demands of energy exploration and seismic monitoring equipment.
●The DAC1280 is designed to match the system components (power supply, clock and reference voltage) of the companion ADCs, the ADS1281 and ADS1282. The input to the DAC1280 is a 1s density modulated bitstream. The DAC1280 output is a differential current intended for use with an active I/V converter. The I/V converter provides a voltage output suitable for performance testing of sensors and ADCs.
●Three gain control pins set the output range in 6dB steps from 0dB to –36db (±2.5V to ±0.039V differential). The attenuation ranges match the gains of the ADS1282 for testing at all gains. The DAC uses a reference voltage and bias resistor to set the full-scale output. The resistor can be adjusted to fine-trim the DAC full-scale.
●The SYNC pin aligns the input data sampling to the CLK phase. A power-down pin shuts down the device when not in use. The DAC1280 is available in a small, 16-pin TSSOP package and is fully specified for operation over –40°C to +85°C temperature range with a maximum operating temperature of +125°C.
● Outstanding Performance:
● THD: –125dB
● SNR: 120dB (413Hz BW, Gain = 1/1)
● Gain Error: 0.1%
● Pin Operation: No Registers to Program
● Gain: 1/1 to 1/64
● SYNC Input for Phase Control
● Power-Down Mode
● Low Power: 18mW
● Analog Supply: +5V or ±2.5V
● Digital Supply: 1.8V to 3.3V
● Small 16-Pin TSSOP Package
● Temperature Range: –40°C to +85°C
● APPLICATIONS
● Energy Exploration Equipment
● Seismic Monitoring Systems
●All other trademarks are the property of their respective owners
Part 3D Model
