Datasheet

MAX1454
Precision Sensor Signal Conditioner
with Overvoltage Protection
3Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
(V
DDX
= 5V, V
GND
= 0V, T
A
= +25NC, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ANALOG OUTPUT
Differential Signal Gain
Selectable in 32 steps 6 to 2048
V/V
PGA[4:0] = 00000bin 5.5 6 6.5
PGA[4:0] = 00101bin 12.5 14 15.5
PGA[4:0] = 01010bin 40 44 48
PGA[4:0] = 01100bin 58 64 70
PGA[4:0] = 01101bin 72 80 88
PGA[4:0] = 01110bin 86 96 106
PGA[4:0] = 01111bin 101 112 123
PGA[4:0] = 10000bin 130 144 158
PGA[4:0] = 10110bin 374 416 458
PGA[4:0] = 11100bin 1037 1152 1267
PGA[4:0] = 11111bin 1823 2048 2253
Output-Voltage Swing No load
V
GND
+
0.02
V
DDX
-
0.32
V
Output-Voltage Low I
OUT
= 1mA sinking, T
A
= T
MIN
to T
MAX
0.25 V
Output-Voltage High I
OUT
= 1mA sourcing, T
A
= T
MIN
to T
MAX
V
DDX
-
0.55
V
Output Current Drive
Capability
Maintain DC output to 2mV error compared
to no load case (Note 4)
Q1
mA
Output Source Current Limit 8 mA
Output Sink Current Limit -8 mA
Output Impedance at DC V
OUT
= 2.5V 0.2
I
Output Offset Ratio
DV
OUT
/
DOffset DAC
0.9 1.2 V/V
Output Offset TC Ratio
DV
OUT
/
DOffset TC DAC
0.9 1.2 V/V
Step Response
(63% Final Value)
85
Fs
Maximum Capacitive Load 0.01
FF
Noise at Output Pin
DC to 1kHz, source
impedance = 5kI
Gain = 36 0.5
mV
RMS
Gain = 256 1.5
Gain = 512 3
Gain = 1024 6
Gain = 2048 12