參數(shù)資料
型號: MAX395EWG+T
廠商: Maxim Integrated Products
文件頁數(shù): 7/16頁
文件大?。?/td> 0K
描述: IC SWITCH OCTAL SPST 24SOIC
產品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 1,000
功能: 開關
電路: 8 x SPST - NO
導通狀態(tài)電阻: 100 歐姆
電壓電源: 單/雙電源
電壓 - 電源,單路/雙路(±): 2.7 V ~ 8 V,± 2.7 V ~ 16 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 24-SOIC(0.295",7.50mm 寬)
供應商設備封裝: 24-SOIC W
包裝: 帶卷 (TR)
MAX395
Serially Controlled, Low-Voltage,
8-Channel SPST Switch
______________________________________________________________________________________
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-Frequency Performance
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
0
1
X
D6
RESET
X
0
FUNCTION
X
1
D4
X
1
X
0
D5
X
0
1
X
0
1
X
0
1
X
D2
DATA BITS
X
All switches open, D7–D0 = 0
Switch 6 off and 7 on
Switch 7 off and 6 on
X
1
X
1
X
1
X
D0
X
D1
X
1
X
Switch 4 off and 5 on
Switch 2 off and 3 on
Switch 3 off and 2 on
Switch 5 off and 4 on
X
1
0
D7
X
D3
X
1
0
Switch 1 off and 0 on
X
Table 2. SPDT Switch Programming
X
1
0
1
Switch 0 off and 1 on
X
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