MAX9934 Maxim, MAX9934 Datasheet - Page 8

• 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

High-Precision, Low-Voltage, Current-Sense Amplifier
with Current Output and Chip Select for Multiplexing
(V
V
8
CC
CC
_______________________________________________________________________________________
/2 for bidirectional operation. T
= 3.3V, V
500mV/div
500mV/div
500mV/div
20mV/div
V
2V/div
SENSE
V
V
-100
-120
V
V
OUT
OUT
-20
-40
-60
-80
OUT
RS+
CS
0
0.01
= V
POWER-SUPPLY REJECTION RATIO
MAX9934T
MAX9934F
RS-
LARGE-SIGNAL INPUT STEP
1% FINAL VALUE
RESPONSE (MAX9934F)
OUTPUT SELECT TIME
0.1
= 3.0V, V
0.01% FINAL VALUE
vs. FREQUENCY
FREQUENCY (kHz)
100µs/div
40Fs/div
1.0
A
SENSE
= +25°C, unless otherwise noted.)
0.1% FINAL VALUE
0.1% FINAL VALUE
1% FINAL VALUE
1% FINAL VALUE
= 0V, C
10
MAX9934 toc24
MAX9934 toc26
Typical Operating Characteristics (continued)
L
100
= 1000pF, R
2V
1V
1V
1V
OUT
= 10kΩ to GND for unidirectional operation, R
500mV/div
5mV/div
V
SENSE
2V/div
1V/div
V
V
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
OUT
V
OUT
CS
0
1.00
CS DISABLED TRANSIENT RESPONSE
±1V V
vs. PERCENTAGE OF FINAL VALUE
1% FINAL VALUE
PERCENTAGE OF FINAL VALUE (%)
LARGE-SIGNAL INPUT STEP
0.01% FINAL VALUE
OUT
C
RESPONSE (MAX9934T)
OUTPUT SETTING TIME
OUT
MAX9934F
STEP
= 10pF (MAX9934T)
400µs/div
4µs/div
0.10
MAX9934T
OUT
MAX9934 toc25
MAX9934 toc27
C
L
= 10kΩ to
= 0
0.01
2V
1V