Texas Instruments achieves industry’s lowest drift with family of high-voltage bipolar DACs

The DAC8734 offers automated test equipment (ATE) and medical equipment designers space savings and flexibility in a 6 mm x 6 mm QFN-40 or 7 mm x 7 mm TQFP-48 package. The device is capable of driving ±16 V or 0 to +20 V across four channels, eliminating the external operational amplifier typically required for additional voltage gain. Designers need to add only a single voltage reference, such as the REF5050, for bipolar operation.

Key features and benefits of the DAC8734
· Lowest drift over time and temperature provides high stability:
o 2 ppm over 500 hours; 3 ppm over 1000 hours
o Bipolar output:
§ Zero error temperature coefficient (TC) of ±0.5 ppm FSR/°C;
§ Gain error TC ±0.5 ppm FSR/°C
o Unipolar output:
§ Zero error TC of ±0.2 ppm FSR/°C;
§ Gain error TC ±0.5 ppm FSR/°C
· Widest operating temperature range of -40°C to 105°C helps ensure performance in extreme environments
· Integral non-linearity of ±1 LSB, maximum (0.006% FSR), is achievable even at 16-bit resolution. To further boost precision, the family is trimmed during manufacturing to a maximum gain error of 4 LSB (at 16 bits). Built-in user calibration further reduces gain error down to ±1 LSB, maximum, with a zero error of up to 1/8 LSB
· The device’s programmable output range of 2x to 4x the reference voltage for bipolar operation at ±2 V to ±16 V maximizes design flexibility