Datasheet

MAX4130–MAX4134
Single/Dual/Quad, Wide-Bandwidth, Low-Power,
Single-Supply, Rail-to-Rail I/O Op Amps
12
Maxim Integrated
Power-Up and Shutdown Mode
The MAX4130–MAX4134 amplifiers typically settle with-
in 1µs after power-up. Figures 9 and 10 show the out-
put voltage and supply current on power-up, using the
test circuit of Figure 8.
The MAX4131 and MAX4133 have a shutdown option.
When the shutdown pin (SHDN) is pulled low, the sup-
ply current drops below 25µA per amplifier and the
amplifiers are disabled with the outputs in a high-
impedance state. Pulling SHDN high or leaving it float-
ing enables the amplifier. In the dual-amplifier
MAX4133, the shutdown functions operate indepen-
dently. Figures 11 and 12 show the output voltage and
supply current responses of the MAX4131 to a shut-
down pulse, using the test circuit of Figure 8.
R
S
C
L
Figure 7. Capacitive-Load Driving Circuit
SHDN
OUT
0V TO 2.7V
STEP FOR
SHUTDOWN
TEST
0V TO 2.7V STEP
FOR POWER-UP
TEST; 2.7V FOR
SHUTDOWN
ENABLE TEST
SUPPLY-CURRENT
MONITORING POINT
V
CC
*0.1μF
10Ω
2kΩ
*FOR SHUTDOWN TEST ONLY.
10kΩ
2kΩ
Figure 8. Power-Up/Shutdown Test Circuit
V
CC
TIME (5μs/div)
VOLTAGE (1V/div)
OUT
Figure 9. Power-Up Output Voltage
V
CC
(1V/div)
TIME (5μs/div)
I
EE
(500μA/div)
Figure 10. Power-Up Supply Current