MAX4528EUA+T [MAXIM]
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| 型号： | MAX4528EUA+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
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19-1325; Rev 0; 1/98
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MAX4528
________________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
♦ 5pC (max) Charge Injection
The MAX4528 low-voltage, CMOS analog IC is config-
ured as a phase-reversal switch and optimized for high-
s p e e d a p p lic a tions s uc h a s c hop p e r a mp lifie rs . It
operates from a +2.7V to +12V single supply or from
±2.7V to ±6V dual supplies.
♦ 110Ω Signal Paths with ±5V Supplies
♦ Rail-to-Rail Signal Handling
♦ Transition Time <100ns with ±5V Supplies
♦ 1.0µA (max) Current Consumption
♦ >2kV ESD Protection per Method 3015.7
♦ TTL/CMOS-Compatible Input
On-resistance (110Ω max) is matched between switch-
es to 7Ω (max). Each switch can handle Rail-to-Rail®
analog signals. The leakage current is only 0.5nA at
+25°C and 20nA at +85°C. All digital inputs have 0.8V
to 2.4V log ic thre s hold s , e ns uring b oth TTL- a nd
CMOS-logic compatibility.
♦ Small Packages: 8-Pin SO, DIP, and µMAX
For hig he r volta g e op e ra tion, s e e the MAX4526/
MAX4527 data sheet.
________________________Ap p lic a t io n s
_______________Ord e rin g In fo rm a t io n
Chopper-Stabilized Amplifiers
Balanced Modulators/Demodulators
Data Acquisition
PART
TEMP. RANGE
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
PIN-PACKAGE
8 Plastic DIP
8 SO
MAX4528CPA
MAX4528CSA
MAX4528CUA
MAX4528C/D
MAX4528EPA
MAX4528ESA
MAX4528EUA
8 µMAX
Test Equipment
Dice*
Audio-Signal Routing
8 Plastic DIP
8 SO
8 µMAX
*Contact factory for availability.
_________________________P in Co n fig u ra t io n /Fu n c t io n a l Dia g ra m /Tru t h Ta b le
TOP VIEW
MAX4528
A
B
8
7
6
5
1
2
3
4
V+
X
TRUTH TABLE
IN
O
1
A
Y
X
B
X
Y
Y
GND
IN
V-
DIP/SO/µMAX
SWITCH POSITIONS SHOWN WITH IN = LOW
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
________________________________________________________________ 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.
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ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND)
V+ .............................................................................-0.3V to 13V
V-...............................................................................-13V to 0.3V
V+ to V-.....................................................................-0.3V to 13V
All Other Pins (Note 1)..........................(V- - 0.3V) to (V+ + 0.3V)
Continuous Current into Any Terminal..............................±20mA
Peak Current into Any Terminal
Continuous Power Dissipation (T = +70°C) (Note 2)
A
Plastic DIP (derate 9.09mW/°C above +70°C) ............727mW
SO (derate 5.88mW/°C above +70°C).........................471mW
µMAX (derate 4.10mW/°C above +70°C) ....................330mW
Operating Temperature Ranges
MAX4528C_ _ .....................................................0°C to +70°C
MAX4528E_ _ ..................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
(pulsed at 1ms, 10% duty cycle)...................................±50mA
ESD per Method 3015.7 ..................................................>2000V
MAX4528
Note 1: Signals on IN, A, B, X, or Y 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: ±5V Dual Supplies
(V+ = 5V, V- = -5V, V
= 2.4V, V = 0.8V, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
INH
INL
A
MIN
MIN
TYP
(Note 3)
MAX
PARAMETER
ANALOG SWITCH
SYMBOL
CONDITIONS
T
UNITS
A
V , V ,
A
B
Analog-Signal Range
(Note 4)
V = V = ±3V, I = I = 1mA
A
C, E
V-
V+
V
Ω
V , V
X
Y
+25°C
C, E
70
3
110
130
7
A-X, A-Y, B-X, B-Y
On-Resistance
R
ON
B
A
B
+25°C
C, E
A-X, A-Y, B-X, B-Y
On-Resistance Match (Note 5)
∆R
V
= V = ±3V, I = I = 1mA
Ω
ON
A
B
A
B
9
+25°C
C, E
9
15
17
0.5
20
A-X, A-Y, B-X, B-Y
On-Resistance Flatness (Note 6)
V
I
A
= V = 3V, 0V, -3V;
B
= I = 1mA
B
A
R
Ω
FLAT(ON)
+25°C
C, E
-0.5
-20
0.01
A-B, X-Y Leakage Current
(Note 7)
I , I ,
V+ = 5.5V; V- = -5.5V; V = 0V, 3V;
IN
V
A
A
B
nA
–
I , I
= ±4.5V; V = +4.5V
X
Y
B
LOGIC INPUT
IN Input Logic Threshold High
IN Input Logic Threshold Low
V
C, E
C, E
1.6
1.6
2.4
1
V
V
INH
V
INL
0.8
-1
IN Input Current Logic High
or Low
I
,
INH
V
IN_
= 0.8V or 2.4V
C, E
0.03
µA
I
INL
SWITCH DYNAMIC CHARACTERISTICS
+25°C
C, E
70
20
100
125
V
= V = ±3V, V+ = 5V, V- = -5V,
B
= 300Ω, Figure 3
A
Transition Time
t
ns
ns
TRANS
R
L
+25°C
C, E
1
V
= V = ±3V, V+ = 5V, V- = -5V,
B
= 300Ω, Figure 4
A
Break-Before-Make Time Delay
t
BBM
Q
R
L
Charge Injection (Note 4)
C
= 1.0nF, V or V = 0V, Figure 5 +25°C
1
5
pC
pF
L
A
B
A-X, A-Y, B-X, B-Y Capacitance
C
V
A
= V = GND, f = 1MHz, Figure 6 +25°C
13
ON
B
A-X, A-Y, B-X, B-Y Isolation
(Note 8)
R
V
A
= 50Ω, C = 15pF, f = 1MHz,
L
L
V
ISO
+25°C
-68
dB
= V = 1V
, Figure 7
B
RMS
2
_______________________________________________________________________________________
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MAX4528
ELECTRICAL CHARACTERISTICS: ±5V Dual Supplies (continued)
(V+ = 5V, V- = -5V, V
= 2.4V, V = 0.8V, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
INH
INL
A
MIN
MIN
TYP
(Note 3)
MAX
PARAMETER
POWER SUPPLY
SYMBOL
CONDITIONS
T
UNITS
A
Power-Supply Range
V+, V-
I+
C, E
±2.7
-1
±6
1
V
+25°C
C, E
V+ Supply Current
V
= 0V or V+
= 0V or V+
µA
IN
-10
-1
10
1
+25°C
C, E
V- Supply Current
I-
V
IN
µA
-10
10
ELECTRICAL CHARACTERISTICS: +5V Single Supply
(V+ = 5V, V- = 0V, V
= 2.4V, V = 0.8V, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.)
MAX A
INH
INL
A
MIN
MIN
TYP
(Note 3)
MAX
PARAMETER
ANALOG SWITCH
SYMBOL
CONDITIONS
T
UNITS
A
V , V ,
A
B
Analog-Signal Range
(Note 4)
V = V = 3V, I = I = 1mA
A
C, E
V-
V+
V
Ω
V , V
X
Y
+25°C
C, E
120
5
175
200
10
A-X, A-Y, B-X, B-Y
On-Resistance
R
ON
B
A
B
+25°C
C, E
A-X, A-Y, B-X, B-Y
On-Resistance Match (Note 5)
∆R
V
= V = 3V, I = I = 1mA
Ω
ON
A
B
A
B
12
+25°C
C, E
-0.5
-20
0.01
0.5
20
A-B, X-Y Leakage Current
(Note 9)
I , I ,
V+ = 5.5V; V = 0V, 3V;
IN
V = 4.5V, 1V; V = 1V, 4.5V
A B
A
B
nA
I , I
X
Y
LOGIC INPUT
IN Input Logic Threshold High
IN Input Logic Threshold Low
V
C, E
C, E
1.6
1.6
2.4
1
V
V
INH
V
INL
0.8
-1
IN Input Current Logic High
or Low
I
,
INH
V
IN_
= 0.8V or 2.4V
C, E
0.03
µA
I
INL
SWITCH DYNAMIC CHARACTERISTICS (Note 4)
+25°C
C, E
110
20
175
200
V
= V = 3V, V+ = 5V, R = 300Ω,
B L
A
Transition Time
t
ns
ns
TRANS
Figure 3
+25°C
C, E
1
V
= V = 3V, V+ = 5V, R = 300Ω,
A
B
L
Break-Before-Make Time Delay
t
BBM
Q
Figure 4
Charge Injection
C
= 1.0nF, V or V = 0V, Figure 5 +25°C
1.5
17
5
pC
pF
L
A
B
A-X, A-Y, B-X, B-Y Capacitance
C
V = V = GND, f = 1MHz, Figure 6 +25°C
A B
OFF
A-X, A-Y, B-X, B-Y Isolation
(Note 8)
R
V
A
= 50Ω, C = 15pF, f = 1MHz,
L
L
V
ISO
+25°C
-70
dB
= V = 1V
, Figure 7
B
RMS
POWER SUPPLY
Power-Supply Range
V+
I+
C, E
2.7
-1
12
1
V
+25°C
C, E
V+ Supply Current
V
IN
= 0V or V+
µA
-10
10
_______________________________________________________________________________________
3
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ELECTRICAL CHARACTERISTICS: +3V Single Supply
(V+ = 2.7V to 3.6V, V- = 0V, V
= 2.4V, V
= 0.6V, T = T
to T
, unless otherwise noted. Typical values are at
INH
INL
A
MIN
MAX
T
A
= +25°C.)
MIN
TYP
(Note 3)
MAX
PARAMETER
SYMBOL
CONDITIONS
T
UNITS
A
ANALOG SWITCH
V , V ,
A
B
Analog-Signal Range
(Note 4)
C, E
V-
V+
V
V , V
MAX4528
X
Y
+25°C
C, E
250
900
A-X, A-Y, B-X, B-Y
On-Resistance
V+ = 3V, V = V = 1.5V,
A
B
R
Ω
ON
I
= I = 0.1mA
B
A
1000
LOGIC INPUT
IN Input Logic Threshold High
IN Input Logic Threshold Low
V
V+ = 3V
V+ = 3V
C, E
C, E
0.9
0.9
2.4
1
V
V
INH
V
INL
0.6
-1
IN Input Current Logic High
or Low
I
,
INH
V
= 0V or V+
C, E
0.03
µA
IN_
I
INL
SWITCH DYNAMIC CHARACTERISTICS (Note 4)
+25°C
C, E
150
150
1
400
500
V
= 1.5V, V = 0V, V+ = 3V,
B
A
Transition Time
t
TRANS
ns
V- = 0V, R = 1kΩ, Figure 3
L
+25°C
C, E
2
V
= 1.5V, V = 0V, V+ = 3V,
B
A
Break-Before-Make Time Delay
t
ns
BBM
Q
V- = 0V, R = 1kΩ, Figure 4
L
Charge Injection
C
= 1.0nF, V or V = 0V, Figure 5 +25°C
5
pC
L
A
B
POWER SUPPLY
Power-Supply Range
V+, V-
I+
C, E
2.7
-1
12
1
V
+25°C
C, E
V+ Supply Current
V
IN
= 0V or V+
µA
-10
10
Note 3: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 4: Guaranteed by design.
Note 5: ∆R
= ∆R
- ∆R
.
ON(MIN)
ON
ON(MAX)
Note 6: Resistance flatness is defined as the difference between the maximum and the minimum value of on-resistance as measured
over the specified analog-signal range.
Note 7: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at +25°C.
Note 8: Off isolation = 20log10 [(V or V ) / (V or V )], V or V = output, V or V = input to off switch.
X
Y
A
B
A
B
A
B
Note 9: Leakage testing for single-supply operation guaranteed by testing with dual supplies.
4
_______________________________________________________________________________________
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MAX4528
__________________________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(V+ = 5V, V- = -5V, GND = 0V, T = +25°C, unless otherwise noted.)
A
ON-RESISTANCE vs.
ON-RESISTANCE vs. V , V
ON-RESISTANCE vs. V , V
V , V , AND TEMPERATURE
A
B
A
B
A
B
(DUAL SUPPLIES)
(SINGLE SUPPLY)
(DUAL SUPPLIES)
1000
100
10
140
120
100
1000
100
10
V- = 0V
V+ = 1.2V
V- = -1.2V
V+ = 2V
T = +125°C
V+ = 2.7V
V- = -2.7V
A
T = +70°C
A
T = +85°C
A
V+ = 2.7V
V+ = 3.3V
V+ = 5V
V+ = 2V
V- = -2V
80
60
V+ = 3.3V
V- = -3.3V
V+ = 7.5V
V+ = 5V
V- = -5V
T = -55°C
V+ = 10V
T = -40°C
A
40
20
0
A
T = +25°C
A
-5 -4 -3 -2 -1
0
1
2
3
4
5
-5 -4 -3 -2 -1
0
1
2
3
4
5
0
1
2
3
4
5
6
7
8
9
10
V , V (V)
V , V (V)
V V (V)
A, B
A
B
A
B
ON-RESISTANCE vs.
V , V , AND TEMPERATURE
CHARGE INJECTION, CHARGE-
INJECTION MATCHING vs. V
A
B
LEAKAGE vs. TEMPERATURE
V
B
(SINGLE SUPPLY)
A,
200
180
160
10
5
10,000
T = +125°C
A
T = +85°C
A
∆Q MATCHING
T = +70°C
A
1000
100
0
140
120
100
80
Q
Y
-5
10
1
-10
-15
-20
-25
T = +25°C
A
T = -40°C
A
60
T = -55°C
A
0.1
40
Q
X
0.01
V+ = 5V
V- = 5V
V+ = 5V
V- = 0V
20
0
0.001
0
1
2
3
4
5
-5 -4 -3 -2 -1
0
1
2
3
4
5
-55
-25
5
35
65
95
125
V , V (V)
V V (V)
A, B
TEMPERATURE (°C)
A
B
CHARGE INJECTION, CHARGE-
CHARGE INJECTION, CHARGE-
INJECTION MATCHING vs. V , V
INJECTION MATCHING vs. V , V
A
B
A
B
TRANSITION TIME
vs. SUPPLY VOLTAGE
(+3V SUPPLY)
(+5V SUPPLY)
4
3
4
2
250
200
150
100
50
V+ = 3V
V- = 0V
∆Q MATCHING
2
0
Q
X
Q
X
Q
Y
1
-2
-4
-6
-8
-10
SINGLE SUPPLY
0
Q
Y
-1
-2
-3
∆Q MATCHING
V+ = 5V
V- = 0V
DUAL SUPPLIES
0
0
1
2
3
4
5
0
1
2
3
4
5
6
2
4
8
10
V , V (V)
A B
V , V (V)
A
B
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5
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_________________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V+ = 5V, V- = -5V, GND = 0V, T = +25°C, unless otherwise noted.)
A
SUPPLY CURRENT AND GROUND CURRENT
vs. INPUT VOLTAGE
FREQUENCY RESPONSE
TRANSITION TIME vs. TEMPERATURE
MAX4528-12
180
150
120
90
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
250
200
150
100
50
1
V- = 0V
-1
ON LOSS
OFF ISOLATION
10
MAX4528
+2.7V SINGLE SUPPLY
-2
10
-3
V+ = 12V
10
60
-4
10
30
-5
10
ON PHASE
+5V SINGLE SUPPLY
0
-6
10
-30
-60
-90
-120
-7
V+ = 5V
10
-8
10
V+ = 5V
V- = -5V
50Ω IN AND OUT
-9
10
-10
10
-150
-180
±5V DUAL SUPPLIES
-11
0
-120
10
0.1
1
10
FREQUENCY (MHz)
100
1000
-55
-25
5
35
65
95
125
0
1
2
3
4
5
6
7
8
9
10 11 12
TEMPERATURE (°C)
V
(V)
IN
LOGIC-LEVEL THRESHOLD
vs. SUPPLY VOLTAGE
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
100
3.0
2.5
2.0
V+ = 5V
V- = -5V
600Ω IN AND OUT
10
1
1.5
1.0
0.1
0.01
0.5
0
0
20k
10k
10
100
1k
FREQUENCY (Hz)
1
2
3
4
5
6 7 8 9 10 11 12
V+ (V)
6
_______________________________________________________________________________________
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MAX4528
both DC and AC symmetry are optimized with a small
8-pin configuration that allows simple board layout and
isolation of logic signals from analog signals.
_____________________P in De s c rip t io n
PIN
NAME
FUNCTION
P o w e r-S u p p ly Co n s id e ra t io n s
Analog-Switch Input Terminal A.
Connected to Y when IN is low; con-
nected to X when IN is high.
1
A
Overview
The MAX4528’s construction is typical of most CMOS
analog switches. It has three supply pins: V+, V-, and
GND. V+ and V- drive the internal CMOS switches and
set the analog-voltage limits on any switch. Reverse
ESD-p rote c tion d iod e s a re inte rna lly c onne c te d
between each analog-signal pin and both V+ and V-.
One of these diodes conducts if any analog signal
exceeds V+ or V-.
Analog-Switch Input Terminal B.
Connected to X when IN is low; con-
nected to Y when IN is high.
2
3
B
Ground. Connect GND to digital
ground. (Analog signals have no
ground reference; they are limited to
V+ and V-.)
GND
Virtually all of the analog leakage current is through the
ESD diodes to V+ or V-. 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 dif-
ference 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 either the same or opposite polarity.
Logic-Level Control Inputs (see Truth
Table)
4
5
IN
V-
Negative Analog Supply-Voltage
Input. Connect V- to GND for single-
supply operation.
6
7
Y
X
Analog-Switch Output Terminal Y
Analog-Switch Output Terminal X
Positive Analog/Digital Supply-Voltage
Input. Internally connected to sub-
strate.
8
V+
Note: Pins A, B, X, and Y are identical and interchangeable.
Any may be considered as an input or output; signals pass
equally well in either direction. However, AC symmetry is best
when A and B are the inputs and X and Y are the outputs.
Reduce AC balance in critical applications by using A and X or
A and Y as the input, and B and X or B and Y as the output.
The re is no c onne c tion b e twe e n the a na log -s ig na l
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
translator and set the input logic threshold. The logic-
level translator converts the logic levels to switched V+
and V- signals to drive the analog switches’ gates. This
drive signal is the only connection between GND and
the analog supplies. V+ and V- have ESD-protection
diodes to GND. The logic-level input has ESD protec-
tion to V+ and V-, but not to GND, so the logic signal
can go below GND (as low as V-) when bipolar sup-
plies are used.
_______________De t a ile d De s c rip t io n
The MAX4528 is a phase-reversal analog switch consist-
ing of two normally open and two normally closed CMOS
analog switches arranged in a bridge configuration.
Analog signals are put into two input pins and taken out
of two output pins. A logic-level signal controls whether
the input signal is routed through normally or inverted. A
low-resistance DC path goes from inputs to outputs at all
times, yet isolation between the two signal paths is excel-
lent. Analog signals range from V- to V+.
Increasing V- has no effect on the logic-level thresholds,
but it does increase the drive to the internal P-channel
switches, reducing overall switch on-resistance. V- also
sets the negative limit of the analog-signal voltage.
These parts are characterized and optimized with ±5V
supplies, and can operate from a single supply.
The logic-level input pin (IN) has ESD-protection diodes
to V+ and V- but not to GND, so it can be safely driven
The MAX4528 is designed for DC and low-frequency-
signal phase-reversal applications, such as chopper
amplifiers, modulator/demodulators, and self-zeroing or
se lf-c a libra ting c irc uits. Unlike c onve ntiona l CMOS
switches externally wired in a bridge configuration,
to V+ and V-. The logic-level threshold (V ) is CMOS/
IN
TTL compatible when V+ is between 4.5V and 12V
(see Typical Operating Characteristics).
_______________________________________________________________________________________
7
Lo w -Vo lt a g e , P h a s e -Re ve rs a l
An a lo g S w it c h
Bipolar Supplies
Ba la n c e d Mo d u la t o r/De m o d u la t o r
The MAX4528 can be used as a balanced modulator/
d e mod ula tor a t c a rrie r fre q ue nc ie s up to 100kHz
(Figure 2). Higher frequencies are possible, but as fre-
quency increases, small imbalances in the MAX4528’s
internal capacitance and resistance gradually impair
performance. Similarly, imbalances in external circuit
capacitance and resistance to GND reduce overall car-
rier suppression.
The MAX4528 operates with bipolar supplies between
±2.7V and ±6.0V. The V+ and V- supplies need not be
symme tric a l, but the ir sum c a nnot e xc e e d the 13V
a b s olute ma ximum ra ting (s e e Ab s olute Ma ximum
Ratings).
Single Supply
The MAX4528 operates from a single +2.7V to +12V
supply when V- is connected to GND. Observe all of
the bipolar precautions when operating from a single
supply.
MAX4528
The carrier is applied as a logic-level square wave to
IN. (Note that this voltage can go as negative as V-.)
For best carrier suppression, the power-supply volt-
ages should be equal, the square wave should have a
precise 50% duty cycle, and both the input and output
signals should be symmetrical around ground. Bypass
V+ and V- to GND with 0.1µF ceramic capacitors, as
close to the IC pins as possible. In critical applications,
carrier suppression can be optimized by trimming duty
cycle, DC bias around GND, or external source and
load capacitance.
__________Ap p lic a t io n s In fo rm a t io n
The MAX4528 is designed for DC and low-frequency-
signal phase-reversal applications. Both DC and AC
symmetry are optimized for use with ±5V supplies.
S ig n a l P h a s e /P o la rit y Re ve rs a l
The MAX4528 can reverse the phase or polarity of a
pair of signals that are out-of-phase and balanced to
ground. This is done by routing signals through the
MAX4528 and, under control of IN, reversing the two
signals paths inside the switch before sending out to a
balanced output. Figure 1 shows a typical example.
The MAX4528 cannot reverse the phase or polarity
of a single grounded signal, as can be done with an
inverting op amp or transformer.
In signal lines, balancing both capacitance and resis-
tance to GND produces the best carrier suppression.
Tra ns forme r c oup ling of inp ut a nd outp ut s ig na ls
provides the best isolation and carrier suppression.
Transformers can also provide signal filtering, imped-
a nc e ma tc hing , or low-nois e volta g e g a in. Us e a
center-tapped transformer or high-resistance voltage
divider to provide a DC path to GND on either the input
or output signal. This ensures a DC path to GND and
symmetrical operation of the internal switches.
V+
V+
MAX4528
MAX4528
V+
A
V+
A
B
INPUTS
INPUTS
X
Y
X
Y
B
OUTPUTS
OUTPUTS
IN
IN
LOGIC LOW
LOGIC HIGH
V-
V-
GND
GND
V-
V-
TRUTH TABLE
IN
O
1
A
Y
X
B
X
Y
Figure 1. Typical Application Circuits
_______________________________________________________________________________________
8
Lo w -Vo lt a g e , P h a s e -Re ve rs a l
An a lo g S w it c h
MAX4528
TIME WAVEFORMS
LOGIC
(CARRIER)
OUTPUT SPECTRUM
A
LOWER
SIDEBAND
UPPER
SIDEBAND
MODULATOR/DEMODULATOR CIRCUIT
SUPPRESSED CARRIER
V+
B
X
V+
NPUT
A
OUTPUT
X
B
Y
AMPLITUDE
IN
GND V-
LOGIC (CARRIER)
MAX4528
V-
Y
FREQUENCY
X-Y
(OUTPUT)
Figure 2. Balanced Modulator/Demodulator
______________________________________________Te s t Circ u it s /Tim in g Dia g ra m s
V+
V+
0V
V
IN
V+
50%
A
B
X
+3V
-3V
IN
V
IN
50Ω
MAX4528
GND
V
B
V
OUT
90%
V-
V-
300Ω
35pF
0V
V
OUT
90%
V
A
t
t
TRANS
TRANS
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 3. Address Transition Time
_______________________________________________________________________________________
9
Lo w -Vo lt a g e , P h a s e -Re ve rs a l
An a lo g S w it c h
_________________________________Te s t Circ u it s /Tim in g Dia g ra m s (c o n t in u e d )
t
t
< 5ns
< 5ns
F
V+
V+
R
V+
0V
V
IN
50%
V
IN
MAX4528
A
B
+3V
IN
50Ω
MAX4528
GND
V
OUT
90%
X OR Y
V-
V
OUT
300Ω
35pF
V-
0V
t
BBM
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 4. Break-Before-Make Interval
V+
V+
0V
B OR A
A OR B
N.C.
V OR V
V+
V
IN
A
B
MAX4528
GND
V
IN
IN
X OR Y
V-
V
OUT
V
OUT
∆V
OUT
50Ω
C
L
1000pF
V-
∆V IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
OUT
ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = ∆V x C
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
OUT
L
Figure 5. Charge Injection
10 ______________________________________________________________________________________
Lo w -Vo lt a g e , P h a s e -Re ve rs a l
An a lo g S w it c h
MAX4528
_________________________________Te s t Circ u it s /Tim in g Dia g ra m s (c o n t in u e d )
V+
V+
A
B
V+
MAX4528
X
Y
1MHz
CAPACITANCE
ANALYZER
IN
SWITCH
SELECT
GND
V-
V-
Figure 6. A, B, X, Y Capacitance
V+
V+
10nF
NETWORK
ANALYZER
V
V
OUT
OFF ISOLATION = 20log
V
IN
IN
A, B
50Ω
50Ω
V
V
OUT
V+
ON LOSS = 20log
MAX4528
GND
IN
V
OUT
MEAS.
REF
IN
X, Y
V-
SWITCH
SELECT
50Ω
50Ω
10nF
V-
MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS.
OFF ISOLATION IS MEASURED BETWEEN A, B AND "OFF" X, Y TERMINAL.
ON LOSS IS MEASURED BETWEEN A, B AND "ON" X, Y TERMINAL.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 7. Off Isolation and On Loss
______________________________________________________________________________________ 11
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An a lo g S w it c h
____________________________________________________________Ch ip To p o g ra p h y
TRANSISTOR COUNT: 141
V+
SUBSTRATE IS INTERNALLY CONNECTED TO V+
X
A
MAX4528
0. 054"
(1. 37mm)
B
Y
GND
N
V-
0. 038
(0. 97mm)
________________________________________________________P a c k a g e In fo rm a t io n
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 ____________________Ma x im In t e g ra t e d P ro d u c t s , 1 2 0 S a n Ga b rie l Drive , S u n n yva le , CA 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0
© 1998 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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