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MAX4784EUE+T

P1-P3P4-P6P7-P9P10-P11
Detailed Description
The MAX4780/MAX4784 are low 0.7Ω (at V+ = +2.7V)
on-resistance, low-voltage, quad 2:1 analog multiplexers/
demultiplexers that operate from a +1.6V to +4.2V single
supply. CMOS switch construction allows switching
analog signals that are within the supply voltage range
(GND to V+).
When powered from a +2.7V supply, the 0.7Ω R
ON
allows high continuous currents to be switched in a
variety of applications.
Applications Information
Proper power-supply sequencing is recommended for all
CMOS devices. Do not exceed the absolute maximum
ratings, because stresses beyond the listed ratings can
cause permanent damage to the devices. Always
sequence V+ on first, followed by NO_, NC_, or COM_.
Although it is not required, power-supply bypassing
improves noise margin and prevents switching noise
propagation from the V+ supply to other components. A
0.1µF capacitor, connected from V+ to GND, is adequate
for most applications.
MAX4780/MAX4784
0.7
ΩΩ
, Low-Voltage, Quad 2:1 Analog
Multiplexers
_______________________________________________________________________________________ 7
Pin Description
PIN
MAX4780 MAX4784
TSSOP THIN QFN-EP TSSOP THIN QFN-EP
NAME FUNCTION
1 15 1 15 A0 Address Input
2 16 2 16 NC1 Normally Closed Terminal
3 1 3 1 NO1 Normally Open Terminal
4 2 4 2 COM1 Analog Switch Common Terminal
5 3 5 3 NC2 Normally Closed Terminal
6 4 6 4 NO2 Normally Open Terminal
7 5 7 5 COM2 Analog Switch Common Terminal
8 6 8 6 GND Ground
9 7 9 7 COM3 Analog Switch Common Terminal
10 8 10 8 NO3 Normally Open Terminal
11 9 11 9 NC3 Normally Closed Terminal
12 10 12 10 COM4 Analog Switch Common Terminal
13 11 13 11 NO4 Normally Open Terminal
14 12 14 12 NC4 Normally Closed Terminal
15 13 — — A1 Address Input
— — 15 13 EN
Enable. Connect to GND for normal operation.
Connect to logic-level high to turn all switches off.
16 14 16 14 V+ Positive Supply Voltage
—— — — EP
Exposed Pad. Internally connected to GND. Connect to a large
ground plane to maximize thermal performance. Not intended as an
electrical connection point. (Thin QFN package only.)
1.6V TO 4.2V
INTERNAL
SPEAKER
R
L
= 8Ω
RING TONE/
MELODY IC
MAX4780
AUDIO
CODEC
V
CC
SYSTEM
CONTROLLER
EXTERNAL
SPEAKER
R
L
= 8Ω OR 32Ω
Typical Application Circuit
Logic Inputs
The MAX4780/MAX4784 logic inputs can be driven up
to +4.2V regardless of the supply voltage. For example,
with a +1.8V supply, A_ and EN may be driven low to
GND and high to +4.2V. Driving A_ and EN rail-to-rail
minimizes power consumption. Drive EN low to enable
the COM_ outputs. When EN is high, the COM_ outputs
are high impedance.
Analog Signal Levels
Analog signals that range over the entire supply voltage
(V+ to GND) can be passed with very little change in on-
resistance (see the
Typical Operating Characteristics
).
The switches are bidirectional, so the NO_, NC_, and
COM_ pins can be used as either inputs or outputs.
Layout
High-speed switches require proper layout and design
procedures for optimum performance. Reduce stray
inductance and capacitance by keeping traces short
and wide. Ensure that bypass capacitors are as close
to the device as possible. Use large ground planes
where possible.
MAX4780/MAX4784
0.7
ΩΩ
, Low-Voltage, Quad 2:1 Analog
Multiplexers
8 _______________________________________________________________________________________
Test Circuits/Timing Diagrams
V
A0
V+
V
OUT
GND
V+
A0
COM
NO
V
NO_
NC
MAX4780/
MAX4784
R
L
C
L
*
*C
L
INCLUDES STRAY CAPACITANCE.
**MAX4784 ONLY.
EN**
50%
V
IH
+ 0.5V
0
V
OUT
GND
V
A0
90%
t
OFF
t
ON
t
R
< 5ns
t
F
< 5ns
Figure 1. Turn-On and Turn-Off Times
50%
V
IH
+ 0.5V
0
V
COM
V
OUT
V
A0
0
90%
t
BBM
V
A0
V+
V
OUT
GND
V+
A0
NC, NO
COM
V
N_ _
MAX4780/
MAX4784
R
L
C
L
*
*C
L
INCLUDES STRAY CAPACITANCE.
**MAX4784 ONLY.
t
R
< 5ns
t
F
< 5ns
EN**
Figure 2. Break-Before-Make Interval
Test Circuits/Timing Diagrams (continued)
MAX4780/MAX4784
0.7
ΩΩ
, Low-Voltage, Quad 2:1 Analog
Multiplexers
_______________________________________________________________________________________ 9
NOTES: MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT SOCKET TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM AND "OFF" NO TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM AND "ON" NO TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO ALL OTHER CHANNELS.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
*MAX4784 ONLY.
V+
V
OUT
V
IN
GND
V+
V
IN
V
OUT
MEAS
NETWORK
ANALYZER
50Ω 50Ω
50Ω
OFF-ISOLATION = 20log
ON-LOSS = 20log
CROSSTALK = 20log
50Ω
REF
V
OUT
V
IN
V
OUT
V
IN
A0
V+ OR GND
NC, NO
COM
10nF
MAX4780/
MAX4784
EN*
Figure 5. Off-Isolation, On-Loss, and Crosstalk
V+
GND
V+
A0
V+ OR GND
1MHz
CAPACITANCE
ANALYZER
NC, NO
COM
MAX4780/
MAX4784
EN*
*MAX4784 ONLY.
Figure 4. Capacitance
0
V+
∆ V
OUT
IS THE MEASURED VOLTAGE DUE TO CHARGE-
TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF.
∆ V
OUT
Q = ∆ V
OUT
✕
C
L
V
OUT
V+
V
OUT
V
GEN
R
GEN
GND
V+
A0
V+ OR GND
NC, NO
COM
MAX4780/
MAX4784
C
L
*
EN**
V
EN
*C
L
INCLUDES STRAY CAPACITANCE.
**MAX4784 ONLY.
V
EN
Figure 3. Charge Injection
P1-P3P4-P6P7-P9P10-P11

MAX4784EUE+T

Mfr. #:
Buy MAX4784EUE+T
Manufacturer:
Maxim Integrated
Description:
Multiplexer Switch ICs 4Ch SPDT Low V Analog Switch
Lifecycle:
New from this manufacturer.
Delivery:
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