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參數(shù)資料
| 型號： | MAX395 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 1:10 LVDS Serdes Receiver 100 - 660Mbps 28-SSOP -40 to 85 |
| 中文描述： | 串行控制、低電壓、8通道、SPST開關(guān) |
| 文件頁數(shù)： | 15/16頁 |
| 文件大小： | 123K |
| 代理商： | MAX395 |
M
S erially Controlled, Low-Voltage,
8-Channel S PS T S witc h
______________________________________________________________________________________
15
age current flows to the supply terminals, not to the
other switch terminal. This is why both sides of a given
switch can show leakage currents of either the same or
opposite polarity.
There is no connection between the analog signal
paths and GND.
V+ and GND power the internal logic and logic-level
translators, and set both the input and output logic lim-
its. The logic-level translators convert the logic levels to
switched V+ and V- signals to drive the analog signal
gates. This drive signal is the only connection between
the logic supplies (and signals) and the analog sup-
plies. V+, and V- have ESD-protection diodes to GND.
The logic-level inputs and output have ESD protection
to V+ and to GND.
The logic-level thresholds are CMOS and TTL compati-
ble when V+ is +5V. As V+ is raised, the threshold
increases slightly. So when V+ reaches +12V, the
threshold is about 3.1V; slightly above the TTL guaran-
teed high-level minimum of 2.8V, but still compatible
with CMOS outputs.
Bipolar Supplies
The MAX395 operates with bipolar supplies between
±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 MAX395
V+ to +3V and connect the logic-level pins to TTL
logic-level signals. This exceeds the absolute maxi-
mum ratings and can damage the part and/or exter-
nal circuits.
Single Supply
The MAX395 operates from a single supply 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 due entirely to
capacitive coupling.
X
1
0
X
X
X
X
X
X
D6
RESET
X
X
X
1
0
X
FUNCTION
X
X
X
D4
X
X
X
0
1
X
X
X
X
D5
X
0
0
1
1
X
1
1
X
X
X
X
X
1
0
X
X
D2
DATA BITS
X
X
X
X
All switches open, D7–D0 = 0
Switch 7 off and 6 on
Switch 6 off and 7 on
Switch 5 off and 4 on
X
X
1
1
X
X
X
1
1
1
X
X
X
1
0
D0
X
X
X
X
X
X
X
0
1
D1
X
X
X
X
Switch 4 off and 5 on
Switch 3 off and 2 on
Switch 2 off and 3 on
Switch 1 off and 0 on
Switch 0 off and 1 on
X
0
1
X
X
D7
D3
Table 2. SPDT Switch Programming
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