Digitally Programmable Sensor Signal Amplifier
Data Sheet
Digitally Programmable Sensor Signal Amplifier with EMI Filters AD8556
FEATURES
EMI filters at input pins S...
Description
Data Sheet
Digitally Programmable Sensor Signal Amplifier with EMI Filters AD8556
FEATURES
EMI filters at input pins Specified from −40°C to +140°C Low offset voltage: 10 µV maximum Low input offset voltage drift:
65 nV/°C maximum High CMRR: 94 dB minimum Digitally programmable gain and output offset voltage Programmable output clamp voltage Open and short wire fault detection Low-pass filtering Single-wire serial interface Stable with any capacitive load SOIC_N and LFCSP_WQ packages 4.5 V to 5.5 V operation
APPLICATIONS
Pressure and position sensors Precision current sensing Strain gages
FUNCTIONAL BLOCK DIAGRAM
DIGIN
VCLAMP
VDD
VPOS VNEG
LOGIC VDD
DAC
EMI FILTER
1 +IN 2 A5 OUT 3
–IN VSS
EMI FILTER
1 +IN 2 A1 OUT
3
–IN
R2
VSS
R5 P2
P4
R7
EMI FILTER
EMI FILTER
R3
VDD
1 +IN 2 A2 OUT
3
–IN
R1
P1 R4
VDD
1 +IN 2 A3 OUT
3
–IN
VSS
R5
P3
RF
EMI FILTER
VDD
1 +IN 2 A4 OUT
3
–IN
VSS
VSS
AD8556
VSS
FILT/DIGOUT
Figure 1.
05448-053
VOUT
Rev. B
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