Datasheet

1µs/div
RECOVERY FROM INPUT OVERLOAD
(PGA, GAIN = 1V/V)
INA+ - INA-
2V/div
MAX9939 toc15
OUTA
1V/div
400ns/div
RECOVERY FROM INPUT OVERLOAD
(PGA, GAIN = 157V/V)
INA+ - INA-
2mV/div
MAX9939 toc16
OUTA
1V/div
1µs/div
RECOVERY FROM INPUT OVERLOAD
(OUTPUT AMPLIFIER)
IN
2V/div
MAX9939 toc17
OUTB
2V/div
200µs/div
GAIN ADJUST RESPONSE
INA+ - INA-
2mV/div
MAX9939 toc18
OUTA
1V/div
GAIN = 157V/V
GAIN = 40V/V
GAIN = 10V/V
GAIN = 1V/V
MAX9939
SPI Programmable-Gain Amplifier
with Input V
OS
Trim and Output Op Amp
6
Maxim Integrated
Typical Operating Characteristics (continued)
(V
CC
= 5V, V
GND
= 0V, V
IN+
= V
IN-
= 0V, Gain = 10V/V, R
OUTA
= R
OUTB
= 1kΩ to V
CC
/2, T
A
= +25°C, unless otherwise noted.)
0
200
100
400
300
600
500
700
900
800
1000
0406020 80 100 120 140 160
1% SETTLING TIME vs. GAIN (PGA)
MAX9939 toc14
GAIN (V/V)
SETTLING TIME (ns)
V
OUT
= 2V
P-P
OUTPUT IMPEDANCE vs. FREQUENCY
MAX9939 toc13
FREQUENCY (MHz)
IMPEDANCE (Ω)
10.10.01
0.1
1
10
100
0.01
0.001 10
AMPLIFIER B