AD1862 dual mono sign magnitude architecture digital to analog converter with built-in I/V converter
The TWSDAC-1862 is 20 bit 384kHz dual mono sign magnitude architecture DAC with built-in I/V converter.
Features:
Inputs: 20 bit custom protocol (provided by the TWSAFB-LT FIFO buffer)
Format: up to 20 bit 384kHz
Architecture: dual AD1862 with sign magnitude architecture
Clock mode: stopped clock
Master clock: 5.6448/6.144 MHz up to 176.4/192KHz, 11.2896/12.288 MHz up to 352.8/384 KHz
Isolation: Full optical isolation
Output: 1.9V rms, zero feedback discrete current to voltage converter (DC coupled)
Power supply: 4 shunt regulators for the DAC section (+/- 5VDC digital, +/-12VDC analog), inductive power supply for the I/V section (+/-20VDC).
Suitable transformer: 30VA, 7.5VAC/300mA x 2, 13.5VAC/350mA x 2, 50VAC/160mA x 2
Board size: 127 x 209 mm
Get the best performance
The TWSAFB-LT FIFO buffer provides the custom protocol to feed the AD1862 DAC in dual mono/sign magnitude architecture. This architecture avoids the DAC to switch the MSB every zero crossing in order to decrease the glitch and improve the distortion figure at low output level.
Two DAC chip are needed for each channel.
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