Datasheet

Applications Information
Operation with Supply Voltages
Other than ±15V
Using supply voltages other than ±15V will reduce the
analog signal range. The MAX306/MAX307 switches
operate with ±4.5V to ±20V bipolar supplies or with a
+5V to +30V single supply; connect V- to GND when
operating with a single supply. Also, both device types
can operate with unbalanced supplies such as +24V and
-5V. The Typical Operating Characteristics graphs show
typical on-resistance with 20V, 15V, 10V, and 5V supplies.
(Switching times increase by a factor of two or more for
operation at 5V.)
Overvoltage Protection
Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute maxi-
mum ratings because stresses beyond the listed ratings
may cause permanent damage to the devices. Always
sequence V+ on first, then V-, followed by either the
logic inputs, NO or COM. If power-supply sequencing is
not possible, add two small-signal diodes in series with
supply pins for overvoltage protection (Figure 1). Adding
diodes reduces the analog signal range to 1V above V+
and 1V below V-, but low switch resistance and low leak-
age characteristics are unaffected. Device operation is
unchanged, and the difference between V+ and V- should
not exceed +44V.
Figure 1. Overvoltage Protection Using External Blocking
Diodes
MAX306
PIN
NAME FUNCTION
1 V+ Positive Supply Voltage Input
2, 3, 13 N.C.
No Connection. Not internally
connected.
4–11 NO16–NO9 Analog Inputs–bidirectional
12 GND Ground
14–17 A3–A0 Address Inputs
18 EN Enable Inputs
19–26 NO1–NO8 Analog Inputs–bidirectional
27 V- Negative Supply Voltage Input
28 COM Output–bidirectional
MAX307
PIN
NAME FUNCTION
1 V+ Positive Supply Voltage Input
2 COMB Output B–bidirectional
3, 13, 14 N.C.
No Connection. Not internally
connected.
4–11 NO8B–NO1B Analog Inputs–bidirectional
12 GND Ground
15, 16, 17 A2, A1, A0 Address Inputs
18 EN Enable Input
19–26 NO1A–NO8A Analog Inputs–bidirectional
27 V- Negative Supply Voltage Input
28 COMA Output A–bidirectional
V
g
NO
COM
MAX306
V-
V+
MAX306/MAX307 Precision, 16-Channel/Dual 8-Channel,
High-Performance, CMOS Analog Multiplexers
www.maximintegrated.com
Maxim Integrated │ 6
Pin Description