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Quad-Channel, Ultra-Low-Noise Amplifier with
Digitally Programmable Input Impedance
Typical Operating Characteristics (continued)
(MAX2034 Typical Application Circuit , V CC = +4.75V to +5.25V, source impedance R S = 200 ? , PD = 0, D2/D1/D0 = 0/1/0 (R IN = 200 ? ),
signal AC-coupled to IN_, INB_ is AC grounded, V OUT is the differential output between OUT_+ and OUT_-, f IN_ = 5MHz, R L = 200 ?
between the differential outputs, C L = 20pF from each output to ground, T A = 0°C to +70°C, unless otherwise specified.)
CLAMP SYMMETRY UNDER
LARGE-SIGNAL RECOVERY
MAX2034 toc16
TRANSMIT RECOVERY
MAX2034 toc17
f IN_ = 10MHz
f IN_ = 5MHz
SINGLE-ENDED
400ns/div
INPUT IN_
500mV/div
DIFFERENTIAL
OUTPUT
OUT_+ - OUT_-
2.0V/div
200ns/div
OUTPUT OUT_+
1V/div
SINGLE-ENDED
OUTPUT OUT_-
1V/div
Pin Description
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15, 21, 22, 25,
26, 33, 37, 39,
40, 46
16, 17, 20, 27,
30, 34, 38, 41,
44, 45
NAME
INC1
INB1
ZF2
IN2
INC2
INB2
ZF3
IN3
INC3
INB3
ZF4
IN4
INC4
INB4
GND
V CC
FUNCTION
Channel 1 Analog Input Clamp. Input port to the integrated clamping diodes.
Channel 1 Analog Bypass Input. Connect a capacitor to GND as close as possible to the pin.
Channel 2 Active Impedance-Matching Port. AC-couple to the source circuit with a capacitor.
Channel 2 LNA Analog Input. Single-ended input for channel 2 amplifier. Connect the analog input to
the source circuit through a series capacitor.
Channel 2 Analog Input Clamp. Input port to the integrated clamping diodes.
Channel 2 Analog Bypass Input. Connect a capacitor to GND as close as possible to the pin.
Channel 3 Active Impedance-Matching Port. AC-couple to the source circuit with a capacitor.
Channel 3 LNA Analog Input. Single-ended input for channel 3 amplifier. Connect the analog input to
the source circuit through a series capacitor.
Channel 3 Analog Input Clamp. Input port to the integrated clamping diodes.
Channel 3 Analog Bypass Input. Connect a capacitor to GND as close as possible to the pin.
Channel 4 Active Impedance-Matching Port. AC-couple to the source circuit with a capacitor.
Channel 4 LNA Analog Input. Single-ended input for channel 4 amplifier. Connect the analog input to
the source circuit through a series capacitor.
Channel 4 Analog Input Clamp. Input port to the integrated clamping diodes.
Channel 4 Analog Bypass Input. Connect a capacitor to GND as close as possible to the pin.
Ground
5V Power Supply. Supply for the four LNAs. Bypass each V CC supply with a 100nF capacitor as
close as possible to the pin.
6
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