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參數(shù)資料
| 型號(hào)： | MAX349 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Serially Controlled, Low-Voltage, 8-Channel Multiplexers(接通電阻100Ω,漏電流0.1nA,導(dǎo)通速率0.275μs,串行控制多路轉(zhuǎn)換器) |
| 中文描述： | 串行控制、低電壓、8通道和雙4通道多路復(fù)用器 |
| 文件頁(yè)數(shù)： | 18/20頁(yè) |
| 文件大?。?/td> | 214K |
| 代理商： | MAX349 |
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M
S erially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
18
______________________________________________________________________________________
Bipolar Supplies
The MAX349/MAX350 operate with bipolar supplies
from ±3.0V and ±8V. The V+ and V- supplies need not
be symmetrical, but their sum cannot exceed the
absolute maximum rating of 17V.
Do not connect the
MAX349/MAX350 V+ to +3V and connect the logic-
level pins to TTL logic-level signals. This exceeds
the absolute maximum ratings and can damage the
part and/or external circuits.
Single Supply
The MAX349/MAX350 operate from single supplies
between +3V and +16V when V- is connected to GND.
All of the bipolar precautions must be observed.
High-Frequenc y Performanc e
In 50
systems, signal response is reasonably flat up
to 50MHz (see Typical Operating Characteristics).
Above 20MHz, the on response has several minor
peaks that are highly layout dependent. The problem is
not turning the switch on, but turning it off. The off-state
switch acts like a capacitor and passes higher frequen-
cies with less attenuation. At 10MHz, off isolation is
about -45dB in 50
systems, becoming worse (approx-
imately 20dB per decade) as frequency increases.
Higher circuit impedances also make off isolation
worse. Adjacent channel attenuation is about 3dB
above that of a bare IC socket, and is entirely due to
capacitive coupling.
______________________Pin Configurations/Func tional Diagrams (c ontinued)
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
CS
TOP VIEW
RESET
DOUT
V-
GND
DIN
V+
SCLK
N.C.
N.C.
NO7
NO6
NO2
NO1
NO0
COM
12
11
9
10
NO5
NO4
N.C.
NO3
SSOP
MAX349
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
CS
RESET
DOUT
V-
GND
DIN
V+
SCLK
N.C.
N.C. = NOT INTERNALLY CONNECTED
COMB
NO0B
NO1B
NO2A
NO1A
NO0A
COMA
12
11
9
10
NO2B
NO3B
N.C.
NO3A
SSOP
LOGIC
LOGIC
MAX350
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