P re c is io n , Hig h -S id e
Cu rre n t -S e n s e Am p lifie rs
1/MAX472
ELECTRICAL CHARACTERISTICS—MAX472
(V = +3V to +36V, RG1 = RG2 = 200Ω, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.)
CC
A
MIN
MAX
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
36
UNITS
V
Supply Voltage
Supply Current
V
CC
3
I
CC
I
= 0A, excludes I ; V = 3V to 20V
SIGN CC
20
48
µA
LOAD
MAX472C
MAX472E
120
140
35
Input Offset Voltage
(Note 2)
V
µV
OS
Input Bias Current
I
, I
20
µA
µA
RG1 RG2
Input Bias-Current Matching
I
OS
I
- I
±0.4
±3.0
±2
RG1 GR2
MAX472C
MAX472E
MAX472C
MAX472E
MAX472C
MAX472E
= 100mV
MAX472C
MAX472E
V
SENSE
= 100mV,
OUT Current Accuracy
No-Load OUT Error
I
/I
%
RG OUT
V
CC
= 10V (Note 3)
±2.5
2.5
V
CC
= 10V,
µA
V
SENSE
= 0V
3
±2.5
±3.0
0.1
V
CC
= 10V,
Low-Level OUT Error
µA
%/V
µV
V
SENSE
= 3mV
Power-Supply Rejection Ratio
PSRR
3V ≤ V ≤ 36V, V
CC SENSE
60
60
120
140
1.0
SIGN Threshold (V
SENSE
V
CC
= 10V
required to switch SIGN)
SIGN Output Leakage Current
SIGN Output Sink Current
Shutdown Supply Current
SHDN Input Low Voltage
SHDN Input Low Current
SHDN Input High Voltage
SHDN Input High Current
OUT Output Voltage Range
OUT Output Resistance
V
SIGN
= 36V
µA
mA
µA
V
V
SIGN
= 0.3V
0.1
2.4
I
V
SHDN
= 2.4V; V = 3V to 20V
CC
1.5
18.0
0.3
CC(SHDN)
V
IL
I
IL
V
SHDN
= 0V
1.0
µA
V
V
IH
I
IH
V
SHDN
= 2.4V
1.0
µA
V
V
0
1
V
CC
- 1.5
OUT
OUT
R
I
= 1.5mA
3
4
MΩ
OUT
V
C
= 5mV to 150mV, R
= 50pF, 10% to 90%
= 2kΩ,
= 2kΩ,
SENSE
OUT
OUT Rise, Fall Time
t , t
R
µs
F
OUT
OUT Settling Time to 1%
of Final Value
V
SENSE
= 5mV to 150mV, R
OUT
t
15
µs
s
C
= 50pF
OUT
Maximum Output Current
I
1.5
mA
OUT
Note 2: V is defined as the input voltage (V
) required to give minimum I
.
OS
SENSE
OUT
Note 3: V
is the voltage across the sense resistor.
SENSE
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
