Maxim MAX4522CSE Quad, low-voltage, spst analog switch Datasheet

19-1136; Rev 1; 1/97
Quad, Low-Voltage, SPST Analog Switches
____________________________Features
♦ +2V to +12V Single Supply
±2V to ±6V Dual Supplies
♦ 100Ω Signal Paths with ±5V Supplies
♦ Low Power Consumption, <1µW
♦ 4 Separately Controlled SPST Switches
♦ Rail-to-Rail Signal Handling
♦ Pin Compatible with Industry-Standard
DG211/DG212/DG213
♦ >2kV ESD Protection per Method 3015.7
♦ TTL/CMOS-Compatible Inputs with ±5V or
Single +5V Supply
All digital inputs have +0.8V and +2.4V logic thresholds, ensuring TTL/CMOS-logic compatibility when
using ±5V or a single +5V supply.
________________________Applications
______________Ordering Information
Battery-Operated Equipment
PART
TEMP. RANGE
PIN-PACKAGE
Data Acquisition
MAX4521CPE
0°C to +70°C
16 Plastic DIP
Test Equipment
MAX4521CSE
MAX4521CEE
MAX4521C/D
0°C to +70°C
0°C to +70°C
0°C to +70°C
16 Narrow SO
16 QSOP
Dice*
Avionics
Audio Signal Routing
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
Networking
_____________________Pin Configurations/Functional Diagrams/Truth Tables
VIEW
TOPTOP
VIEW
IN1 1
16 IN2
COM1 2
15 COM2
NC1 3
14 NC2
V- 4
13 V+
MAX4521
GND 5
NC4 6
IN4 8
COM1
14 NO2
V- 4
GND 5
NO4 6
IN3
15 COM2
NO1 3
11 NC3
9
16 IN2
2
12 N.C.
10 COM3
COM4 7
IN1 1
13 V+
MAX4522
DIP/SO/QSOP
MAX4521
LOGIC
SWITCH
MAX4522
LOGIC
SWITCH
1
ON
OFF
N.C. = NOT CONNECTED
0
1
IN3
OFF
ON
14 NC2
V- 4
NO4 6
9
15 COM2
NO1 3
GND 5
DIP/SO/QSOP
0
COM1
11 NO3
IN4 8
16 IN2
2
12 N.C.
10 COM3
COM4 7
IN1 1
13 V+
MAX4523
12 N.C.
11 NC3
10 COM3
COM4 7
9
IN4 8
IN3
DIP/SO/QSOP
LOGIC
0
1
MAX4523
SWITCHES
1, 4
SWITCHES
2, 3
OFF
ON
ON
OFF
SWITCHES SHOWN FOR LOGIC "0" INPUT
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
MAX4521/MAX4522/MAX4523
_______________General Description
The MAX4521/MAX4522/MAX4523 are quad, low-voltage, single-pole/single-throw (SPST) analog switches.
On-resistance (100Ω max) is matched between switches to 4Ω max, and is flat (12Ω max) over the specified
signal range. Each switch can handle rail-to-rail analog
signals. The off-leakage current is only 1nA at +25°C
and 10nA at +85°C.
The MAX4521 has four normally closed (NC) switches,
and the MAX4522 has four normally open (NO) switches. The MAX4523 has two NC switches and two NO
switches.
These CMOS switches can operate with dual power
supplies ranging from ±2V to ±6V or a single supply
between +2V and +12V. They are fully specified for single +2.7V operation.
MAX4521/MAX4522/MAX4523
Quad, Low-Voltage, SPST Analog Switches
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND
V+.....................................................................-0.3V to +13.0V
V- .....................................................................-13.0V to +0.3V
V+ to V- ............................................................-0.3V to +13.0V
All Other Pins (Note 1) ..........................(V- - 0.3V) to (V+ + 0.3V)
Continuous Current into Any Terminal..............................±10mA
Peak Current into Any Terminal
(pulsed at 1ms,10% duty cycle)...................................±20mA
ESD per Method 3015.7 ..................................................>2000V
Continuous Power Dissipation (TA = +70°C) (Note 2)
Plastic DIP (derate 10.53mW/°C above +70°C) ..........842mW
Narrow SO (derate 8.70mW/°C above +70°C) ............696mW
QSOP (derate 9.52mW/°C above +70°C) ....................762mW
CERDIP (derate 10.00mW/°C above +70°C) ...............800mW
Operating Temperature Ranges
MAX452_C_E ......................................................0°C to +70°C
MAX452_E_E ...................................................-40°C to +85°C
MAX452_MJE ................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10 sec) ............................+300°C
Note 1: Signals on NC_, NO_, COM_, or IN_ exceeding V+ or V- are clamped by internal diodes. Limit forward-diode current to
maximum current rating.
Note 2: All leads are soldered or welded to PC boards.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS—Dual Supplies
(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
(Note 3)
MAX
UNITS
ANALOG SWITCH
Analog Signal Range
VCOM_, VNO_,
VNC_
(Note 4)
C, E, M
RON
V+ = 5V, V- = -5V,
VCOM_ = ±3V, ICOM_ = 1mA
C, E, M
∆RON
V+ = 5V, V- = -5V,
VCOM_ = ±3V, ICOM_ = 1mA
COM_ to NO_, COM_ to NC_
On-Resistance Flatness
(Note 6)
RFLAT(ON)
V+ = 5V, V- = -5V,
VCOM_ = ±3V, ICOM_ = 1mA
NO_, NC_ Off-Leakage Current
(Note 7)
INO_(OFF),
INC_(OFF)
V+ = 5.5V, V- = -5.5V,
±
VCOM_ = 4.5V, VN_ = ±4.5V
COM_ Off-Leakage Current
(Note 7)
ICOM_(OFF)
V+ = 5.5V, V- = -5.5V,
±
VCOM_ = ±4.5V, VN_ = 4.5V
COM_ On-Leakage Current
(Note 7)
ICOM_(ON)
COM_ to NO_, COM_ to NC_
On-Resistance
COM_ to NO_, COM_ to NC_
On-Resistance Match Between
Channels (Note 5)
2
V+ = 5.5V, V- = -5.5V,
VCOM_ = ±4.5V
V-
+25°C
65
V+
V
100
Ω
125
+25°C
1
C, E, M
4
6
+25°C
7
C, E, M
12
15
0.01
+25°C
-1
C, E
-10
10
M
-100
100
+25°C
-1
0.01
nA
1
-10
10
M
-100
100
+25°C
-2
C, E
-20
20
M
-200
200
_______________________________________________________________________________________
Ω
1
C, E
0.01
Ω
nA
2
nA
Quad, Low-Voltage, SPST Analog Switches
(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
(Note 3)
MAX
UNITS
LOGIC INPUT
IN_ Input Logic Threshold High
VIN_H
C, E, M
IN_ Input Logic Threshold Low
VIN_L
C, E, M
0.8
1.6
VIN_ = 0.8V or 2.4V
C, E, M
-1
0.03
IN_ Input Current Logic High
or Low
IINH_, IINL_
1.6
2.4
V
V
1
µA
SWITCH DYNAMIC CHARACTERISTICS
+25°C
45
80
Turn-On Time
tON
VCOM_ = ±3V, V+ = 4.5V,
V- = -4.5V, Figure 1
C, E, M
Turn-Off Time
tOFF
VCOM_ = ±3V, V+ = 4.5V,
V- = -4.5V, Figure 1
C, E, M
Break-Before-Make Time Delay
(MAX4523 Only)
tBBM
VCOM_ = ±3V, V+ = 5.5V,
V- = -5.5V, Figure 2
+25°C
CL = 1nF, VNO_ = 0V, RS = 0Ω,
Figure 3
+25°C
1
VNO_ = GND, f = 1MHz,
Figure 6
+25°C
2
pF
Charge Injection (Note 4)
NO_, NC_ Off-Capacitance
Q
CN_(OFF)
100
+25°C
15
30
40
5
20
ns
ns
ns
5
pC
COM_ Off-Capacitance
CCOM_(OFF)
VCOM_ = GND, f = 1MHz,
Figure 6
+25°C
2
pF
COM_ On-Capacitance
CCOM_(ON)
VCOM_ = VNO_ = GND,
f = 1MHz, Figure 7
+25°C
5
pF
Off-Isolation (Note 8)
VISO
RL = 50Ω, CL = 15pF,
VN_ = 1VRMS, f = 100kHz,
Figure 4
+25°C
< -90
dB
Channel-to-Channel Crosstalk
(Note 9)
VCT
RL = 50, CL = 15pF,
VN_ = 1VRMS, f = 100kHz,
Figure 5
+25°C
< -90
dB
POWER SUPPLY
Power-Supply Range
V+, V-
V+ Supply Current
I+
V+ = 5.5V, all VIN_ = 0V or V+
V- Supply Current
I-
V- = -5.5V
C, E, M
+25°C
C, E, M
+25°C
C, E, M
-6
-1
-1
-1
-1
0.05
0.05
6
1
1
1
1
V
µA
µA
_______________________________________________________________________________________
3
MAX4521/MAX4522/MAX4523
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
MAX4521/MAX4522/MAX4523
Quad, Low-Voltage, SPST Analog Switches
ELECTRICAL CHARACTERISTICS—Single +5V Supply
(V+ = +4.5V to +5.5V, V- = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
(Note 3)
MAX
UNITS
ANALOG SWITCH
Analog Signal Range
COM_ to NO_, COM_ to NC_
On-Resistance
VCOM_, VNO_,
VNC_
RON
(Note 4)
C, E, M
V+ = 4.5V, VCOM_ = 3.5V,
ICOM_ = 1mA
C, E, M
COM_ to NO_, COM_ to NC_
On-Resistance Match Between
Channels (Note 5)
∆RON
NO_, NC_ Off-Leakage Current
(Notes 7, 10)
INO_(OFF),
INC_(OFF)
V+ = 5.5V; VCOM_ = 1V, 4.5V;
VN_ = 4.5V, 1V
COM_ Off-Leakage Current
(Notes 7, 10)
ICOM_(OFF)
V+ = 5.5V; VCOM_ = 1V, 4.5V;
VN_ = 4.5V, 1V
COM_ On-Leakage Current
(Notes 7, 10)
ICOM_(ON)
V+ = 5V, VCOM_ = 3.5V,
ICOM_ = 1mA
V+ = 5.5V; VCOM_ = 4.5V, 1V
0
+25°C
125
V+
V
200
Ω
250
+25°C
2
C, E, M
8
10
+25°C
-1
C, E
-10
0.01
10
M
-100
100
0.01
1
+25°C
-1
C, E
-10
10
M
-100
100
0.01
Ω
nA
1
+25°C
-2
C, E,
-20
20
M
-200
200
nA
2
nA
LOGIC INPUT
IN_ Input Logic Threshold High
VIN_H
C, E
IN_ Input Logic Threshold Low
VIN_L
C, E
0.8
1.6
C, E
-1
0.03
1
60
100
IN_ Input Current Logic High
or Low
IINH_, IINL_
VIN_ = 0.8V or 2.4V
1.6
2.4
V
V
µA
SWITCH DYNAMIC CHARACTERISTICS
+25°C
Turn-On Time
tON
VCOM_ = 3V, V+ = 4.5V,
Figure 1
C, E, M
Turn-Off Time
tOFF
VCOM_ = 3V, V+ = 4.5V,
Figure 1
C, E, M
Break-Before-Make Time Delay
(MAX4523 Only)
tBBM
VCOM_ = 3V, V+ = 5.5V,
Figure 2
+25°C
Q
CL = 1nF, VNO_ = 0V, RS = 0Ω,
Figure 3
+25°C
V+ Supply Current
I+
V+ = 5.5V, all VIN_ = 0V or V+
V- Supply Current
I-
V- = 0V
Charge Injection (Note 4)
150
+25°C
20
50
75
10
30
1
ns
ns
ns
5
pC
POWER SUPPLY
4
+25°C
-1
C, E, M
-1
+25°C
-1
C, E, M
-1
0.05
1
1
0.05
_______________________________________________________________________________________
1
1
µA
µA
Quad, Low-Voltage, SPST Analog Switches
(V+ = +2.7V to +3.6V, V- = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
(Note 3)
MAX
UNITS
ANALOG SWITCH
Analog Signal Range
COM_ to NO_, COM_ to NC_
On-Resistance
VCOM_, VNO_,
VNC_
RON
(Note 4)
C, E, M
V+ = 2.7V, VCOM_ = 1.0V,
ICOM_ = 0.1mA
C, E, M
0
+25°C
260
V+
V
500
Ω
600
LOGIC INPUT
IN_ Input Logic Threshold High
VIN_H
C, E
IN_ Input Logic Threshold Low
VIN_L
C, E
0.8
1.6
C, E
-1
0.03
1
120
250
IN_ Input Current Logic High
or Low
IINH_, IINL_
VIN_ = 0.8V or 2.4V
1.6
2.4
V
V
µA
SWITCH DYNAMIC CHARACTERISTICS (Note 4)
+25°C
Turn-On Time
tON
VCOM_ = 1.5V, V+ = 2.7V,
Figure 1
C, E, M
Turn-Off Time
tOFF
VCOM_ = 1.5V, V+ = 2.7V,
Figure 1
C, E, M
Break-Before-Make Time Delay
(MAX4523 Only)
tBBM
VCOM_ = 1.5V, V+ = 3.6V,
Figure 2
+25°C
Q
CL = 1nF, VNO_ = 0V, RS = 0Ω,
Figure 3
+25°C
V+ Supply Current
I+
V+ = 3.6V, all VIN_ = 0V or V+
V- Supply Current
I-
V- = 0V
Charge Injection
300
+25°C
40
80
100
15
50
0.5
ns
ns
ns
5
pC
POWER SUPPLY
+25°C
-1
C, E, M
-1
+25°C
-1
C, E, M
-1
0.05
1
1
0.05
1
1
µA
µA
The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Guaranteed by design.
∆RON = ∆RON(MAX) - ∆RON(MIN).
Resistance flatness is defined as the difference between the maximum and minimum on-resistance values, as measured
over the specified analog signal range.
Note 7: Leakage parameters are 100% tested at maximum rated temperature, and guaranteed by correlation at TA = +25°C.
Note 8: Off-isolation = 20log10 [ VCOM_ / (VNC_ or VNO_) ], VCOM_ = output, VNC_ or VNO_ = input to off switch.
Note 9: Between any two switches.
Note 10: Leakage testing for single-supply operation is guaranteed by testing with dual supplies.
Note 3:
Note 4:
Note 5:
Note 6:
_______________________________________________________________________________________
5
MAX4521/MAX4522/MAX4523
ELECTRICAL CHARACTERISTICS—Single +3V Supply
__________________________________________Typical Operating Characteristics
(V+ = +5V, V- = -5V, GND = 0V, TA = +25°C, unless otherwise noted.)
100
80
250
V+ = 3.3V
80
TA = +85°C
70
TA = +25°C
200
150
60
60
V+, V- = 4.0V
40
100
50
TA = 0°C
V+, V- = 5.0V
20
40
0
30
V+ = 5.0V
50
TA = -55°C
-5 -4 -3 -2 -1
1
0
2
3
4
0
5
-5 -4 -3 -2 -1
0
1
2
3
4
0
5
1
3
2
VCOM (V)
VCOM (V)
ON-RESISTANCE vs. VCOM AND
TEMPERATURE (SINGLE SUPPLY)
ON- AND OFF-LEAKAGE CURRENT
vs. TEMPERATURE
CHARGE INJECTION
vs.VCOM
ON LEAKAGE
TA = +85°C
TA = +25°C
120
100
100p
1
Q (pC)
LEAKAGE (A)
140
MAX4521/2/3-TOC06
1n
160
2
MAX4521/2/3-TOC05
180
10n
MAX4521/2/3-TOC04
TA = +125°C
V+ = +5V
V- = -5V
0
V+ = +5V
V- = 0V
10p
TA = 0°C
5
4
VCOM (V)
200
RON (Ω)
V+ = 2.7V
300
RON (Ω)
RON (Ω)
100
TA = +125°C
90
V+, V- = 3.0V
120
350
MAX4521/2/3-TOC02
V+, V- = 2.0V
140
RON (Ω)
110
MAX4521/2/3-TOC01
180
160
ON-RESISTANCE vs. VCOM
(SINGLE SUPPLY)
ON-RESISTANCE vs. VCOM AND
TEMPERATURE (DUAL SUPPLIES)
MAX4521/2/3-TOC03
ON-RESISTANCE vs. VCOM
(DUAL SUPPLIES)
OFF LEAKAGE
-1
1p
80
TA = -55°C
3
2
4
-55
5
-25
0
25
50
75
-5 -4 -3 -2 -1
100 125
0
1
2
VCOM (V)
TURN-ON/OFF TIME vs.
SUPPLY VOLTAGE
TURN-ON/OFF TIME
vs. TEMPERATURE
POWER-SUPPLY CURRENT
vs. TEMPERATURE
100
MAX4521/2/3-TOC07
180
160
90
1
80
0.1
I+
tON, tOFF (ns)
120
100
80
tON
60
60
tON
50
40
30
5
0.001
0.0001
0
0
4
I-
10
20
3
0.01
5
tOFF
20
tOFF
I+, I- (µA)
70
140
2
4
TEMPERATURE (°C)
200
40
3
VCOM (V)
MAX4521/2/3-TOC09
1
MAX4521/2/3-TOC08
0
6
7
V+ (V)
6
-2
0.1p
60
tON, tOFF (ns)
MAX4521/MAX4522/MAX4523
Quad, Low-Voltage, SPST Analog Switches
8
9
10 11 12
0.00001
-55
-25
0
25
50
75
TEMPERATURE (°C)
100 125
-55
-25
0
25
50
75
TEMPERATURE (°C)
_______________________________________________________________________________________
100 125
Quad, Low-Voltage, SPST Analog Switches
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
FREQUENCY RESPONSE
-10
-20
-10
LOSS (dB)
THD (%)
-30
0.1
-40
0.01
-15
OFF-ISOLATION
-50
-20
-60
-25
-70
-30
ON-PHASE
-35
-80
50Ω IN/OUT
-40
-90
0.001
100
-5
INSERTION LOSS
1
10
5
0
1k
10k
100k
PHASE (DEGREES)
MAX4521/2/3-TOC11
V+ = +5V
V- = -5V
600Ω IN AND OUT
10
0
MAX4521/2/3-TOC10
100
0.01
0.1
1
10
100 300
FREQUENCY (MHz)
FREQUENCY (Hz)
______________________________________________________________Pin Description
PIN
NAME
FUNCTION
MAX4521
MAX4522
MAX4523
1, 16, 9, 8
1, 16, 9, 8
1, 16, 9, 8
IN1–IN4
2, 15, 10, 7
2, 15, 10, 7
2, 15, 10, 7
COM1–COM4
3, 14, 11, 6
—
—
NC1–NC4
Analog Switch Normally Closed Terminals
—
3, 14, 11, 6
—
NO1–NO4
Analog Switch Normally Open Terminals
—
—
3, 6
NO1, NO4
Analog Switch Normally Open Terminals
—
—
14, 11
NC2, NC3
Analog Switch Normally Closed Terminals
4
4
4
V-
Negative Analog Supply-Voltage Input. Connect to GND for singlesupply operation.
5
5
5
GND
Ground. Connect to digital ground. (Analog signals have no ground
reference; they are limited to V+ and V-.)
12
12
12
N.C.
No Connect. Not internally connected.
13
13
13
V+
Logic-Control Digital Inputs
Analog Switch Common* Terminals
Positive Analog and Digital Supply Voltage Input. Internally connected to substrate.
*NO_ (or NC_) and COM_ pins are identical and interchangeable. Either may be considered as an input or output; signals pass
equally well in either direction.
_______________________________________________________________________________________
7
MAX4521/MAX4522/MAX4523
_____________________________Typical Operating Characteristics (continued)
(V+ = +5V, V- = -5V, GND = 0V, TA = +25°C, unless otherwise noted.)
MAX4521/MAX4522/MAX4523
Quad, Low-Voltage, SPST Analog Switches
__________Applications Information
Power-Supply Considerations
Overview
The MAX4521/MAX4522/MAX4523 construction is typical of most CMOS analog switches. They have three
supply pins: V+, V-, and GND. V+ and V- are used to
drive the internal CMOS switches, and they set the limits of the analog voltage on any switch. Reverse ESDprotection diodes are internally connected between
each analog-signal pin and both V+ and V-. If any analog signal exceeds V+ or V-, one of these diodes conducts. During normal operation these reverse-biased
ESD diodes leak, forming the only current drawn from
V+ or V-.
Virtually all the analog leakage current is through the
ESD diodes. Although the ESD diodes on a given signal pin are identical and therefore fairly well balanced,
they are reverse biased differently. Each is biased by
either V+ or V- and the analog signal. This means their
leakages vary as the signal varies. The difference in the
two diode leakages from the signal path to the V+ and
V- pins constitutes the analog-signal-path leakage current. All analog leakage current flows to the supply terminals, not to the other switch terminal. This explains
how both sides of a given switch can show leakage
currents of the same or opposite polarity.
There is no connection between the analog-signal
paths and GND. The analog-signal paths consist of an
N-channel and P-channel MOSFET with their sources
and drains paralleled, and their gates driven out of
phase to V+ and V- by the logic-level translators.
V+ and GND power the internal logic and logic-level
translators, and set the input logic thresholds. The
logic-level translators convert the logic levels to
switched V+ and V- signals, to drive the gates of the
analog switches. This drive signal is the only connection between the logic supplies and the analog supplies. V+ and V- have ESD-protection diodes to GND.
The logic-level inputs and output have ESD protection
to V+ and to GND.
Increasing V- has no effect on the logic-level thresholds, but it does increase the drive to the P-channel
switches, reducing their on-resistance. V- also sets the
negative limit of the analog-signal voltage.
8
The logic-level thresholds are CMOS/TTL compatible
when V+ = +5V. The threshold increases slightly as V+
is raised, and when V+ reaches +12V, the level threshold is about 3.1V. This is above the TTL output highlevel minimum of 2.8V, but still compatible with CMOS
outputs.
Bipolar Supplies
The MAX4521/MAX4522/MAX4523 operate with bipolar
supplies between ±2V and ±6V. The V+ and V- supplies need not be symmetrical, but their sum cannot
exceed the absolute maximum rating of 13.0V. Do not
connect the MAX4521/MAX4522/MAX4523 V+ to +3V,
and then connect the logic-level-input pins to TTL
logic-level signals. TTL logic-level outputs in excess
of the absolute maximum ratings can damage the
part and/or external circuits.
Caution: The absolute maximum V+ to V- differential
voltage is 13.0V. Typical ±6V or 12V supplies with
±10% tolerances can be as high as 13.2V. This voltage
can damage the MAX4521/MAX4522/MAX4523. Even
±5% tolerance supplies may have overshoot or noise
spikes that exceed 13.0V.
Single Supply
The MAX4521/MAX4522/MAX4523 operate from a
single supply between +2V and +12V when V- is connected to GND. All of the bipolar precautions must be
observed.
High-Frequency Performance
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
with high-frequency operation is not turning the switch
on, but turning it off. The off-state switch acts like a
capacitor and passes higher frequencies with less
attenuation. At 10MHz, off-isolation is about -52dB in
50Ω systems, becoming worse (approximately 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.
_______________________________________________________________________________________
Quad, Low-Voltage, SPST Analog Switches
V+
MAX4521
MAX4522
MAX4523
SWITCH
INPUT
SWITCH
OUTPUT
V+
NO
or NC
COM
V COM
GND
LOGIC
INPUT
VOUT
RL
300Ω
IN
LOGIC
INPUT
50%
0V
CL
35pF
t OFF
V-
0V
VOUT
SWITCH
OUTPUT
V-
0.9 x V0UT
0V
0.9 x VOUT
t ON
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
RL
VOUT = VCOM
RL + RON
(
t r < 20ns
t f < 20ns
+3V
)
Figure 1. Switching Time
V+
MAX4523
VCOM1
VCOM2
V+
COM1
LOGIC
INPUT
NO
VOUT1
NC
COM2
RL2
IN1, 2
LOGIC
INPUT
GND
RL1
VOUT2
+3V
50%
0V
CL1
SWITCH
OUTPUT 1
(VOUT1)
CL2
0.9 x V0UT1
0V
SWITCH
OUTPUT 2
(VOUT2)
VV-
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
0.9 x VOUT2
0V
RL = 300Ω
CL = 35pF
tD
tD
Figure 2. Break-Before-Make Interval (MAX4523 only)
MAX4521
MAX4522
MAX4523
V+
∆VOUT
V+
RGEN
VOUT
COM
NC or
NO
VOUT
IN
OFF
CL
V GEN
GND
IN
V-
VVIN = +3V
IN
OFF
ON
ON
OFF
OFF
Q = (∆V OUT )(C L )
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 3. Charge Injection
_______________________________________________________________________________________
9
MAX4521/MAX4522/MAX4523
______________________________________________Test Circuits/Timing Diagrams
MAX4521/MAX4522/MAX4523
Quad, Low-Voltage, SPST Analog Switches
_________________________________Test Circuits/Timing Diagrams (continued)
SIGNAL
GENERATOR 0dBm
MAX4521
MAX4522
MAX4523
V+
10nF
COM
SIGNAL
GENERATOR 0dBm
V+
0V or
2.4V
IN
MAX4521
MAX4522
MAX4523
V+
10nF
V+
COM1
N01
IN1
IN2
50Ω
0V or 2.4V
NC
or NO
ANALYZER
GND
GND
10nF
RL
COM2
N02
ANALYZER
V-
0V or 2.4V
NC
V-
10nF
RL
V-
V-
Figure 4. Off Isolation
Figure 5. Crosstalk
MAX4521
MAX4522
MAX4523
V+
10nF
MAX4521
MAX4522
MAX4523
V+
10nF
V+
V+
COM
COM
CAPACITANCE
METER
0V or
2.4V
IN
CAPACITANCE
METER
f = 1MHz
NC
or NO
GND
V-
10nF
IN
f = 1MHz
NC
or NO
GND
V-
Figure 6. Channel-Off Capacitance
10
0V or
2.4V
V-
V-
Figure 7. Channel-On Capacitance
______________________________________________________________________________________
10nF
Quad, Low-Voltage, SPST Analog Switches
PART
TEMP. RANGE
___________________Chip Topography
PIN-PACKAGE
MAX4521EPE
-40°C to +85°C
16 Plastic DIP
MAX4521ESE
-40°C to +85°C
16 Narrow SO
MAX4521EEE
-40°C to +85°C
16 QSOP
MAX4521MJE
MAX4522CPE
MAX4522CSE
MAX4522CEE
MAX4522C/D
MAX4522EPE
MAX4522ESE
MAX4522EEE
MAX4522MJE
MAX4523CPE
MAX4523CSE
MAX4523CEE
MAX4523C/D
MAX4523EPE
MAX4523ESE
MAX4523EEE
MAX4523MJE
-55°C to +125°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
16 CERDIP**
16 Plastic DIP
16 Narrow SO
16 QSOP
Dice*
16 Plastic DIP
16 Narrow SO
16 QSOP
16 CERDIP**
16 Plastic DIP
16 Narrow SO
16 QSOP
Dice*
16 Plastic DIP
16 Narrow SO
16 QSOP
16 CERDIP**
"B"
GND
V-
"A"
COM4
COM1
IN4
IN1
IN3
IN2
COM2
COM3
0.057"
(1.45mm)
*Contact factory for dice specifications.
**Contact factory for availability.
"C"
V+
"D"
0.046"
(1.19mm)
MAX4521
MAX4522
MAX4523
PIN
NAME
PIN
NAME
PIN
A
NC1
A
NO1
A
NO1
B
NC4
B
NO4
B
NO4
C
NC3
C
NO3
C
NC3
D
NC2
D
NO2
D
NC2
NAME
TRANSISTOR COUNT: 97
SUBSTRATE CONNECTED TO V+
______________________________________________________________________________________
11
MAX4521/MAX4522/MAX4523
_Ordering Information (continued)
MAX4521/MAX4522/MAX4523
Quad, Low-Voltage, SPST Analog Switches
________________________________________________________Package Information
DIM
A
A1
A2
B
C
D
E
e
H
h
L
N
S
α
D
A
e
A1
B
S
E
INCHES
MILLIMETERS
MAX
MIN
MIN
MAX
0.068
0.061
1.55
1.73
0.004 0.0098 0.127
0.25
0.061
0.055
1.40
1.55
0.012
0.008
0.20
0.31
0.0075 0.0098
0.19
0.25
SEE VARIATIONS
0.157
0.150
3.81
3.99
0.25 BSC
0.635 BSC
0.244
0.230
5.84
6.20
0.016
0.010
0.25
0.41
0.035
0.016
0.41
0.89
SEE VARIATIONS
SEE VARIATIONS
8°
0°
0°
8°
DIM PINS
21-0055A
H
QSOP
QUARTER
SMALL-OUTLINE
PACKAGE
h x 45°
α
A2
16
16
20
20
24
24
28
28
D
S
D
S
D
S
D
S
N
E
L
C
DIM
D
0°-8°
A
0.101mm
0.004in.
e
B
A1
E
C
L
Narrow SO
SMALL-OUTLINE
PACKAGE
(0.150 in.)
H
INCHES
MILLIMETERS
MIN
MAX MIN
MAX
0.189 0.196 4.80
4.98
0.0020 0.0070 0.05
0.18
0.337 0.344 8.56
8.74
0.0500 0.0550 1.27
1.40
0.337 0.344 8.56
8.74
0.0250 0.0300 0.64
0.76
0.386 0.393 9.80
9.98
0.0250 0.0300 0.64
0.76
A
A1
B
C
E
e
H
L
INCHES
MAX
MIN
0.069
0.053
0.010
0.004
0.019
0.014
0.010
0.007
0.157
0.150
0.050
0.244
0.228
0.050
0.016
DIM PINS
D
D
D
8
14
16
MILLIMETERS
MIN
MAX
1.35
1.75
0.10
0.25
0.35
0.49
0.19
0.25
3.80
4.00
1.27
5.80
6.20
0.40
1.27
INCHES
MILLIMETERS
MIN MAX
MIN
MAX
0.189 0.197 4.80
5.00
0.337 0.344 8.55
8.75
0.386 0.394 9.80 10.00
21-0041A
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1997 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
Similar pages