X9470
ELECTRICAL CHARACTERISTICS
INSTRUMENTATION AMPLIFIER (CONTINUED)
Recommended Operating Conditions: (Vcc, V+ = 4.75 to 5.25V; Vsense+, Vsense- = 26V; T A = -40°C to +85°C, unless
otherwise noted.)
Limits
Symbol
Parameter
Min. Typ. Max. Units
Test Conditions/Notes
T settle(10)
CMRR
PSRR
Setting time of Instrumentation Amp
Common Mode Rejection Ratio
Power Supply Rejection Ratio
5.0
40
55
μS
dB
dB
? V SENSE = 20mV step, Cout =
10pF, settling to 1% of final value
Measured at V OUT(1,3)
For both Gain 1 and Gain 2
For both Gain 1 and Gain 2
V OUT Range
V OUT
Noise (10)
I VSENSE(10)
C VSENSE(10)
V OUT Voltage Swing
V OUT Voltage Noise, rms
V SENSE+ , V SENSE- Input Bias
Current
V SENSE+ , V SENSE- Input
Capacitance
0.3
0.3
3
250
10
1.8
3.0
V
V
mV
μA
pF
Gain = 20
Gain = 50
Gain = 20
T A = 25°C
Each Input
COMPARATOR
Recommended Operating Conditions: (Vcc, V+ = 4.75 to 5.25V; Vsense+, Vsense- = 26V; T A = -40°C to +85°C, unless
otherwise noted.)
Limits
Symbol
Parameter
Min.
Typ.
Max. Units
Test Conditions/Notes
VOL
Io (10)
Vos (10)
Tpd (10)
Output Voltage Low on the INC/DEC pin
Output sink Current
Input Hysteresis
Response Time for propagation delay
20
2
0.4
3
V
mA
mV
μ S
IOL = 1mA
INC/DEC pin, open drain
Vcc = 5 V
INC/DEC pin with 2k ? pull up
VREF DCP CIRCUIT BLOCK
Recommended Operating Conditions: (Vcc, V+ = 4.75 to 5.25V; Vsense+, Vsense- = 26V; T A = -40°C to +85°C, unless
otherwise noted.)
Limits
Symbol
R TOTAL
Parameter
End to End Resistance
Min.
8
Typ.
10
Max.
12
Units
k ?
Test Conditions/Notes
Number Taps or Positions
64
V RH
V RL
V RW
RH REF Terminal Voltage
RL REF Terminal Voltage
RW REF Terminal Voltage
Rating (10)
Power
AGND
AGND
AGND
2.5
V +
V +
V +
V
V
V
mW
AGND = 0V
AGND = 0V
AGND = 0V
R TOTAL = 10k ?
Resolution (10)
1.6
%
Absolute
Linearity (6)
-0.2
+0.2
MI (8)
Relative Linearity (7)
4
-0.2
+0.2
MI (8)
FN8204.0
March 8, 2005
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