MAX4598 데이터 시트보기 (PDF) - Maxim Integrated
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MAX4598 Datasheet PDF : 12 Pages
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Low-Voltage, Combination Single-Ended
8-to-1/Differential 4-to-1 Multiplexer
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
FREQUENCY RESPONSE
0
MAX4598-09 180
-10
140
INSERTION LOSS
-20
100
-30
60
OFF-ISOLATION
-40
20
-50
-20
-60
ON-PHASE
-60
-70
-100
-80
-140
-90
0.1
1
10
100
FREQUENCY (MHz)
-180
1000
Pin Description
PIN
NAME
FUNCTION
1
COMB Multiplexer Output B
2
A1
Address Bit 1
3
A0
Address Bit 0
4
NO4
Channel Input 4
5
NO2
Channel Input 2
6
NO3
Channel Input 3
7
NO1
Channel Input 1
8
V-
Negative Supply Voltage
9
V+
Positive Supply Voltage
10
COMA Multiplexer Output A
11 NLATCH Data-Strobe Mode Select
12
LATCH Latch Input
13
EN
Multiplexer Enable
14
NO5
Channel Input 5
15
NO7
Channel Input 7
16
NO6
Channel Input 6
17
NO8
Channel Input 8
18
A3
Address Bit 3
19
A2
Address Bit 2
20
GND
Ground
CHARGE INJECTION vs. VCOM
6
5
4
3
V+ = +5V
V- = -5V
2
1
0
V+ = +5V
V- = 0
-1
-2
-5 -4 -3 -2 -1 0 1 2 3 4 5
VCOM (V)
_______________Detailed Description
The MAX4598 can be configured as a single 8-channel
or dual 4-channel multiplexer. In the single 8-to-1 multi-
plexer configuration, COMA connects to one of the
eight inputs (NO1 to NO8), GND, or V+ by the address
inputs A0 to A2 (see Truth Table). In the dual 4-to-1
multiplexer configuration, COMA connects to one of the
four inputs (NO1, NO3, NO5, NO7), GND, or V+, and
COMB connects to one of the four inputs (NO2, NO4,
NO6, NO8) or GND by the address inputs A0 to A2
(see Truth Table).
The MAX4598 functions as a standard multiplexer
when NLATCH is high. When NLATCH is low, the con-
dition set by A0 to A3 is activated at the rising edge of
LATCH. Otherwise, the outputs remain at the previously
set condition.
__________Applications Information
The MAX4598 construction is typical of most CMOS
analog switches. It has three supply pins: V+, V-, and
GND. The positive and negative power supplies are
used to drive the internal CMOS switches and set the
limits of the analog voltage on any switch. Reverse
ESD-protection diodes are internally connected be-
tween each analog signal pin and V+ and V-. If the volt-
age on any pin exceeds V+ or V- by 0.3V, one of the
ESD diodes starts to conduct. During normal operation
these reverse-biased ESD diodes leak, forming the only
current drawn from V-.
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