ADA4922-1

www.DataSheet4U.com High Voltage, Differential 18-Bit ADC Driver ADA4922-1 FEATURES Single-ended-to-differential conversion Low distortion (VO, dm = 40 V p-p) −99 dBc HD at 100 kHz Low differential output referred noise: 12 nV/√Hz High input impedance: 11 MΩ Fixed gain of 2 No external gain components required Low output-referred offset voltage: 1.1 mV max Low input bias current: 3.5 μA max Wide supply range 5 V to 26 V Can produce differential output signals in excess of 40 V p-p High speed 38 MHz, −3 dB bandwidth @ 0.2 V p-p differential output Fast settling time 200 ns to 0.01% for 12 V step on ±5 V supplies Disable feature Available in space-saving, thermally enhanced packages 3 mm × 3 mm LFCSP 8-lead SOIC_EP Low supply current: IS = 10 mA on ±12 V supplies FUNCTIONAL BLOCK DIAGRAM ADA4922-1 NC 1 8 IN REF 2 7 DIS VS+ 3 6 VS– OUT+ 4 5 OUT– 05681-001 NC = NO CONNECT Figure 1. –84 –87 –90 –93 RL = 2kΩ SECOND HARMONIC THIRD HARMONIC DISTORTION (dBc) –96 –99 –102 –105 –108 –111 VS = ±5V, VO, dm = 12V p-p High voltage data acquisition systems Industrial instrumentation Spectrum analysis ATE Medical instruments –117 –120 1 10 VS = ±12V, VO, dm = 40V p-p 100 FREQUENCY (kHz) Figure 2. Harmonic Distortion for Various Power Supplies GENERAL DESCRIPTION The ADA4922-1 is a differential driver for 16-bit to 18-bit ADCs that have differential input ranges up to ±20 V. Configured as an easy-to-use, single-ended-to-differential amplifier, the ADA4922-1 requires n...