MAX395CWG Maxim Integrated Products, MAX395CWG Datasheet - Page 15
MAX395CWG
Manufacturer Part Number
MAX395CWG
Description
Analog Switch ICs
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX395EWG.pdf
(16 pages)
Specifications of MAX395CWG
Switch Configuration
SPST
On Resistance (max)
500 Ohms at 3.6 V
On Time (max)
600 ns at 3.6 V
Off Time (max)
400 ns at 5.5 V
Supply Voltage (max)
16 V
Supply Voltage (min)
2.7 V
Maximum Power Dissipation
941 mW
Maximum Operating Temperature
+ 70 C
Package / Case
SOIC-24 Wide
Minimum Operating Temperature
0 C
Switch Current (typ)
0.007 mA at 5.5 V
Lead Free Status / Rohs Status
No
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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.
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.
Table 2. SPDT Switch Programming
RESET
0
1
1
1
1
1
1
1
1
D7
X
0
1
X
X
X
X
X
X
______________________________________________________________________________________
D6
X
X
X
X
X
X
X
1
0
D5
X
X
X
X
X
X
X
0
1
Serially Controlled, Low-Voltage,
Bipolar Supplies
D4
X
X
X
X
X
X
X
1
0
DATA BITS
D3
X
X
X
X
X
0
1
X
X
8-Channel SPST Switch
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.
In 50Ω 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 50Ω 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.
D2
X
X
X
X
X
1
0
X
X
D1
X
X
X
X
X
X
X
0
1
High-Frequency Performance
D0
X
X
X
X
X
X
X
1
0
All switches open, D7–D0 = 0
Switch 7 off and 6 on
Switch 6 off and 7 on
Switch 5 off and 4 on
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
FUNCTION
Single Supply
15