DAC1282 Datasheet, PDF (36/43 Pages) Texas Instruments – LOW DISTORTION DIGITAL-TO-ANALOG CONVERTER FOR SEISMIC

DAC1282
SBAS490 – DECEMBER 2011
www.ti.com
SINGLE-CHANNEL SEISMIC SYSTEM
Figure 51 illustrates a single-channel data acquisition concept for seismic. The DAC1282 is used to test both the
ADC and geophone. The DAC1282 connects directly to channel 1 of the ADC. Tests of the ADC include THD,
pulse, input noise, common-mode, etc. The DAC output and ADC sample timing are controlled by the SYNC
input pins.
The geophone connects to channel 2 of the ADC through input protection and optional filter networks. The DAC
connects to the geophone using the integrated signal switch. Series resistors isolate the geophone from the DAC
output. Geophone test capabilities include impulse, THD, leakage, and common-mode.
DAC1282
VOUTP
VOUTN
Switch Out Switch In
Inp1
ADS1282
Inp2
Geophone
Protection
Filtering
Figure 51. Single-Channel Seismic System
36
Submit Documentation Feedback
Product Folder Link(s): DAC1282
Copyright © 2011, Texas Instruments Incorporated