MAX9934 Maxim, MAX9934 Datasheet - Page 7

• Manufacturer Part Number: MAX9934
• Description: The MAX9934 high-precision, low-voltage, high-side current-sense amplifier is ideal for both bidirectional (charge/discharge) and unidirectional current measurements in battery-powered portable and laptop devices
• Manufacturer: Maxim

(V
V
High-Precision, Low-Voltage, Current-Sense Amplifier
CC
with Current Output and Chip Select for Multiplexing
CC
/2 for bidirectional operation. T
= 3.3V, V
100nA
100pA
100pA
100fA
10nA
10pA
10nA
10pA
1nA
1pA
1nA
1pA
RS+
-10
-20
-30
-40
10
0
-0.1
0
1
= V
_______________________________________________________________________________________
0.5
RS-
0.4
vs. V
OUTPUT LEAKAGE CURRENT
10
1.0
= 3.0V, V
RS- BIAS CURRENT
RS-
0.9
NORMALIZED GAIN
vs. V
T
vs. FREQUENCY
A
T
FREQUENCY (Hz)
T
1.5
A
(-0.1V ≤ V
T
= +125°C
A
100
A
= +25°C
OUT
= +125°C
1.4
V
= +25°C AND -40°C
V
G = 25FA/mV
OUT
RS-
2.0
A
SENSE
(V
(V)
(V)
= +25°C, unless otherwise noted.)
1.9
CS
1k
2.5
RS-
= 0)
T
2.4
A
= 0V, C
≤ V
G = 5FA/mV
3.0
= -40°C
10k
CC
2.9
3.5
)
Typical Operating Characteristics (continued)
L
100k
3.4
4.0
= 1000pF, R
OUT
= 10kΩ to GND for unidirectional operation, R
100pA
10nA
10pA
-100
-120
-140
1nA
1pA
-20
-40
-60
-80
50
45
40
35
30
25
20
15
10
0
5
0
0.01
3.0
0
COMMON-MODE REJECTION RATIO
0.5
T
A
OUTPUT LEAKAGE CURRENT
vs. V
vs. V
= +25°C
3.5
0.1
1.0
RS- BIAS CURRENT
RS-
OUT
vs. FREQUENCY
FREQUENCY (kHz)
1.5
( 3V ≤ V
4.0
(V
V
T
V
CC
A
OUT
RS-
1.0
2.0
= +125°C
T
= 0, V
(V)
(V)
A
T
T
A
= -40°C
RS_
4.5
A
T
2.5
= -40°C
A
= +125°C
= +25°C
CS
≤ 5.5V)
3.0
10
OUT
= 0)
5.0
3.5
= 10kΩ to
100
4.0
5.5
7