Datasheet

MAX9934
High-Precision, Low-Voltage, Current-Sense Amplifier
with Current Output and Chip Select for Multiplexing
7
Maxim Integrated
Typical Operating Characteristics (continued)
(V
CC
= 3.3V, V
RS+
= V
RS-
= 3.0V, V
SENSE
= 0V, C
L
= 1000pF, R
OUT
= 10kΩ to GND for unidirectional operation, R
OUT
= 10kΩ to
V
CC
/2 for bidirectional operation. T
A
= +25°C, unless otherwise noted.)
1pA
10pA
1nA
100pA
10nA
100nA
-0.1 0.90.4 1.4 1.9 2.4 2.9 3.4
RS- BIAS CURRENT
vs. V
RS-
(-0.1V ≤ V
RS-
≤ V
CC
)
MAX9934 toc16
V
RS-
(V)
RS- BIAS CURRENT (pA)
T
A
= +125°C
T
A
= +25°C AND -40°C
0
15
10
5
20
25
30
35
40
45
50
3.0 4.03.5 4.5 5.0 5.5
RS- BIAS CURRENT
vs. V
RS-
( 3V ≤ V
RS_
≤ 5.5V)
MAX9934 toc17
V
RS-
(V)
RS- BIAS CURRENT (µA)
T
A
= +125°C
T
A
= +25°C
T
A
= -40°C
100fA
1pA
100pA
10pA
1nA
10nA
0 1.0 1.50.5 2.0 2.5 3.0 3.5 4.0
OUTPUT LEAKAGE CURRENT
vs. V
OUT
(V
CS
= 0)
MAX9934 toc18
V
OUT
(V)
OUTPUT LEAKAGE CURRENT
T
A
= +125°C
T
A
= +25°C
T
A
= -40°C
1pA
10pA
100pA
1nA
10nA
0 1.0 2.0 3.00.5 1.5 2.5 3.5 4.0
OUTPUT LEAKAGE CURRENT
vs. V
OUT
(V
CC
= 0, V
CS
= 0)
MAX9934 toc19
V
OUT
(V)
OUTPUT LEAKAGE CURRENT
T
A
= +125°C
T
A
= +25°C
T
A
= -40°C
NORMALIZED GAIN
vs. FREQUENCY
MAX9934 toc20
FREQUENCY (Hz)
NORMALIZED GAIN (dB)
10k1k10010
-30
-20
-10
0
10
-40
1 100k
G = 5FA/mV
G = 25FA/mV
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
MAX9934 toc21
FREQUENCY (kHz)
CMRR (dB)
101.00.1
-120
-100
-80
-60
-40
-20
0
-140
0.01 100