High-Accuracy, High-Side Current Monitors
in SOT23
6  _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(T
A
= +25癈, unless otherwise noted.)
Pin Description
PIN
MAX4004
MAX4006
NAME
FUNCTION
1
1
CLAMP
Clamp Voltage Input. External potential used for voltage
clamping of V
OUT
.
2
2
GND
Ground
3

OUT
Current-Monitor Output. OUT sources a current of 1/10th I
REF
.
4
4
REF
Reference Current Output. REF provides the source current to
the cathode of the photodiode.
5
5
N.C.
No Connection. Not internally connected.
6
6
BIAS
Bias Voltage Input. Bias voltage for photodiode.

3
OUT
Current-Monitor Output. OUT presents a voltage proportional to
I
REF
 at 1V/mA. An internal 10k& resistor connects OUT to GND
(see Functional Diagram).
10ms/div
SHORT-CIRCUIT RESPONSE
(V
BIAS
 = 22V)
0A
CH1
CH1: I
BIAS
, 10mA/div
A: REF SHORTS TO GND
B: CURRENT LIMIT ACTIVE
C: THERMAL SHUTDOWN
A
B
C
T
A
 = +120癈
VOLTAGE DROP
vs. REFERENCE CURRENT
REFERENCE CURRENT (A)
1m
100?/DIV>
10?/DIV>
1?/DIV>
0.20
0.40
0.60
0.80
1.00
1.20
1.40
0
100n
10m
A: T
A
 = -40癈
B: T
A
 = +25癈
C: T
A
 = +85癈
D: T
A
 = +100癈
A
B
C
D
V
BIAS
 = 2.7V
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