Datasheet

MAX9939
SPI Programmable-Gain Amplifier
with Input V
OS
Trim and Output Op Amp
4
Maxim Integrated
CS
t
CSO
t
CSS
t
CL
t
CH
t
DH
t
DS
t
CP
t
CSH
t
CSW
t
CS1
SCLK
DIN
Figure 1. SPI Interface Timing Diagram
Typical Operating Characteristics
(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.)
PGA GAIN vs. FREQUENCY
MAX9939 toc01
FREQUENCY (MHz)
GAIN (dB)
10.1 10
-60
-40
-20
0
20
40
60
-80
0.01 100
R
L
= 10kΩ to V
CC
/2
PGA GAIN vs. FREQUENCY
MAX9939 toc02
FREQUENCY (MHz)
GAIN (dB)
10.1
-3
-2
-1
0
1
2
3
-4
0.01 10
1V/V ≤ GAIN ≤ 157V/V
R
L
= 10kΩ to V
CC
/2
GAIN = 160V/V
GAIN =30V/V
AMPLIFIER B GAIN vs. FREQUENCY
MAX9939 toc03
FREQUENCY (MHz)
GAIN (dB)
10.1 10
-60
-40
-20
0
20
40
60
-80
0.01 100
R
L
= 10kΩ to V
CC
/2
AMPLIFIER B GAIN vs. FREQUENCY
MAX9939 toc04
FREQUENCY (MHz)
GAIN (dB)
10.1
-3
-2
-1
0
1
2
3
-4
0.01 10
R
L
= 10kΩ to V
CC
/2
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
MAX9939 toc05
FREQUENCY (MHz)
CMRR (dB)
1010.01 0.1
-70
-60
-50
-40
-30
-20
-10
0
-80
0.001 100
1V/V ≤ GAIN ≤ 157V/V
GAIN ERROR vs. TEMPERATURE
MAX9939 toc06
TEMPERATURE (°C)
GAIN ERROR (%)
1109580655035205-10-25
0.05
0.10
0.15
0.20
0
-40 125