AS1746-BTDR [AMSCO]
0.5/0.6, Low-Voltage, Dual SPDT Analog Switch; 0.5 / 0.6 ，低电压，双路SPDT模拟开关
| 型号： | AS1746-BTDR |
| 厂家： | 
AMS(艾迈斯) |
| 描述： | 0.5/0.6, Low-Voltage, Dual SPDT Analog Switch |
| 文件： | 总15页 (文件大小：483K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Datasheet
AS1746
0.5/0.6Ω, Low-Voltage, Dual SPDT Analog Switch
1 General Description
2 Key Features
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Single Supply Operation: +1.8V to +5.5V
Normally Closed Switch RON: 0.45Ω (+2.7V Supply)
Normally Open Switch RON: 0.55Ω (+2.7V Supply)
RON Matching Between Channels: 0.06Ω
RON Flatness Over Signal Range: 0.15Ω
Supply Current: 50nA
The AS1746 is a low on-resistance (RON), low-voltage,
dual-single-pole/double-throw (SPDT) analog switch
designed to operate from a single +1.8 to +5.5V supply.
The device features a 0.5Ω (max) RON for normally
closed (NC) switches and a 0.6Ω (max) RON for nor-
mally open (NO) switches using a +2.7V supply.
The AS1746 features break-before-make switching
(2ns) with tON = 50ns and tOFF = 30ns (using a +2.7V
supply).
The digital logic inputs are 1.8V logic-compatible with
+2.7 to +3.3V supplies.
Rail-to-Rail Signal Handling
The AS1746 is available in a TDFN-10 (3x3mm) pack-
age and a WL-CSP-10 package.
1.8V Logic Compatibility
Low Crosstalk: -60dB (100kHz)
High Off-Isolation: -64dB (100kHz)
Total Harmonic Distortion: 0.025%
Ultra-Low Leakage Currents: 1nA (@ TAMB = +25ºC)
Package Types:
- TDFN-10 (3x3mm)
- WL-CSP-10
3 Applications
The device is ideal for audio headsets, MP3 players,
power routing switches, relay replacements, audio and
video signal routing, communications circuits, PCMCIA
cards, mobile phones, MODEMs, and any battery-oper-
ated equipment.
Figure 1. AS1746 - Block Diagram
AS1746
V+
NO1
1
2
3
4
5
10 NO2
Truth Table
NOx to
COM
NCx to
9
8
7
6
COM2
IN
COM
Low
Off
On
On
Off
COM1
IN1
IN2
High
NC2
GND
Switch shown for logic low input.
NC1
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Revision 1.03
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AS1746
Datasheet - Pinout
4 Pinout
Pin Assignments
Figure 2. Pin Assignments (Top View)
GND
B1
V+
NO1
1
2
3
4
5
10 NO2
NC2
IN2
C1
C2
C3
C4
A1
A2
A3
A4
NC1
IN1
9
8
7
6
COM2
COM1
IN1
IN2
AS1746
AS1746
COM2
NO2
COM1
NO1
NC2
GND
NC1
B4
TDFN-10 (3x3mm)
V+
WL-CSP-10
Pin Descriptions
Table 1. Pin Descriptions
Pin Number
Pin Name
Description
Positive Input Supply Voltage
Normally Open Analog Switch 1
Analog Switch 1 Common
Switch 1 Digital Input
V+
NO1
COM1
IN1
Normally Closed Analog Switch 1
Ground
NC1
GND
NC2
IN2
See Figure 2
Normally Closed Analog Switch 2
Switch 2 Digital Input
Analog Switch 2 Common
Normally Open Analog Switch 2
COM2
NO2
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AS1746
Datasheet - Absolute Maximum Ratings
5 Absolute Maximum Ratings
Stresses beyond those listed in Table 2 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 Electrical Character-
istics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Table 2. Absolute Maximum Ratings
Parameter
Min
Max
Units
Comments
V+, INx to GND
-0.3
+7
V
COMx, NOx, NCx signals exceeding V+ or GND
are internally clamped by diodes and forward-
diode current must be limited to the maximum
current rating.
V+ +
0.3
COMx, NOx, NCx, to GND
-0.3
V
COMx, NOx, NCx
-300
-400
-500
+300
+400
mA
mA
mA
Continuous Current
COMx, NOx, NCx
Peak Current
Pulsed at 50% duty cycle
Pulsed at 10% duty cycle
COMx, NOx, NCx
Peak Current
+500
444
Continuous Power Dissipation
Electro-Static Discharge
Latchup Immunity
mW
kV
TAMB = +70ºC
HBM Mil-Std883E 3015.7 methods
Class II, Level A
2.5
250
+85
mA
Operating Ambient
Temperature Range
-40
-65
ºC
ºC
Storage Temperature Range
+150
The reflow peak soldering temperature (body
temperature) specified is in accordance with
IPC/JEDEC J-STD-020D “Moisture/Reflow
Sensitivity Classification for Non-Hermetic Solid
State Surface Mount Devices”.
Package Body Temperature
+260
ºC
The lead finish for Pb-free leaded packages is
matte tin (100% Sn).
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Revision 1.03
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AS1746
Datasheet - Electrical Characteristics
6 Electrical Characteristics
(V+ = +2.7V to +3.3V, VIH = +1.4V, VIL = +0.5V, TAMB = -40°C to +85°C (unless otherwise specified). Typical values are
at +3V and +25°C.
Table 3. Electrical Characteristics
Parameter 1
Symbol
Condition
Min
Typ
Max
Unit
V
Analog Switch
VNOx, VNCx,
VCOMx
Analog Signal Range
0
V+
0.45
0.5
V+ = 2.7V, ICOMx = 100mA,
VNCx = 0 to V+, TAMB = 25°C
0.3
RON(NC)
RON(NO)
NCx On-Resistance
NOx On-Resistance
Ω
V+ = 2.7V, ICOMx = 100mA,
VNCx = 0 to V+
V+ = 2.7V, ICOMx = 100mA,
VNOx = 0 to V+, TAMB = 25°C
0.35
0.55
0.6
Ω
V+ = 2.7V, ICOMx = 100mA,
VNOx = 0 to V+
On-Resistance Match
Between Channels 2
V+ = 2.7V, ICOMx = 100mA,
VNCx/VNOx = 1.5V
ΔRON
0.02
0.06
0.1
0.06
0.15
0.35
Ω
Ω
Ω
NCx On-Resistance
V+ = 2.7V, ICOMx = 100mA,
VNCx = 0 to V+
RFLAT(NC)
RFLAT(NO)
Flatness 3
NOx On-Resistance
V+ = 2.7V, ICOMx = 100mA,
VNOx = 0 to V+
Flatness 3
V+ = 3.3V, VNOx/VNCx = 3V, 0.3V,
VCOMx = 0.3V, 3V, TAMB = 25°C
-1
-10
-2
1
10
2
nA
nA
nA
nA
NCx or NOx Off-
INOxOFF/
INCxOFF
Leakage Current 4
V+ = 3.3V, VNOx/VNCx = 3V, 0.3V,
VCOMx = 0.3V, 3V
V+ = 3.3V, VNOx/VNCx = 3V, 0.3V or float,
VCOMx = 3V, 0.3V, or float, TAMB = 25°C
COMx On-Leakage
ICOMxON
4
Current
V+ = 3.3V, VNOx/VNCx = 3V, 0.3V or float,
VCOMx = 3V, 0.3V, or float
-30
30
Dynamic Characteristics
V+ = 2.7V, VNOx/VNCx = 1.5V,
RLOAD = 50Ω, CLOAD = 35pF,
TAMB = 25°C
30
20
50
60
30
35
Turn On Time 5
tON
ns
ns
V+ = 2.7V, VNOx/VNCx = 1.5V,
RLOAD = 50Ω, CLOAD = 35pF
(see Figure 17 on page 10)
V+ = 2.7V, VNOx/VNCx = 1.5V,
RLOAD = 50Ω, CLOAD = 35pF,
TAMB = 25°C
Turn Off Time 5
tOFF
V+ = 2.7V, VNOx/VNCx = 1.5V,
RLOAD = 50Ω, CLOAD = 35pF
(see Figure 17 on page 10)
V+ = 2.7V, VNOx/VNCx = 1.5V,
RLOAD = 50Ω, CLOAD = 35pF
(see Figure 18 on page 10)
Break-Before-Make
Delay 5
tBBM
2
15
ns
COMx = 0, RS = 0, CLOAD = 1nF (see
Q
Charge Injection
200
pC
Figure 19 on page 10)
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AS1746
Datasheet - Electrical Characteristics
Table 3. Electrical Characteristics (Continued)
Parameter 1
Symbol
Condition
Min
Typ
Max
Unit
VCOMx = 1VRMS, RLOAD = 50Ω, CLOAD =
5pF, f = 100kHz
Off-Isolation 6
Crosstalk
VISO
-64
dB
(see Figure 20 on page 11)
VCOMx = 1VRMS, RLOAD = 50Ω, CLOAD =
5pF, f = 100kHz
VXT
-60
dB
%
(see Figure 20 on page 11)
Total Harmonic
Distortion
RLOAD = 600Ω, INx = 2VP-P,
THD
0.025
f = 20Hz to 20kHz
CNCXOFF
CNOXOFF
CNCXON
CNOXON
Digital I/O
VIH
NCx Off-Capacitance
NOx Off-Capacitance
NCx On-Capacitance
NOx On-Capacitance
f = 1MHz (see Figure 21 on page 11)
f = 1MHz (see Figure 21 on page 11)
f = 1MHz (see Figure 21 on page 11)
f = 1MHz (see Figure 21 on page 11)
84
37
pF
pF
pF
pF
190
150
Input Logic High
Input Logic Low
1.4
-1
V
V
VIL
0.5
1
INx Input Leakage
IINx
VINx = 0 or V+
µA
Current
Power Supply
V+
Power Supply Range
Supply Current
1.8
-50
5.5
50
V
V+ = 5.5V; VINx = 0 or V+, TAMB = 25°C
I+
nA
V+ = 5.5V; VINx = 0 or V+
-350
350
1. The algebraic convention used in this data sheet is such that the most negative value is the minimum and the
most positive value is the maximum.
2. ΔRON = RON(MAX) - RON(MIN) between pins NC1 and NC2 or between pins NO1 and NO2.
3. Flatness is defined as the difference between the maximum and minimum value of RON as measured over the
specified analog signal ranges.
4. 100% tested.
5. Guaranteed by design.
6. Off-isolation = 20LOG10 (VCOM/VNO), VCOM = output, VNO = input to off switch.
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Revision 1.03
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AS1746
Datasheet - Typical Operating Characteristics
7 Typical Operating Characteristics
TAMB = +25ºC. Values measured in TDFN-10 (3x3mm) package.
Figure 3. NC ON-Resistance vs. VCOM
Figure 4. NO ON-Resistance vs. VCOM
0.7
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
VDD = 1.8V
VDD = 1.8V
VDD = 2.0V
0.6
VDD = 2.0V
0.5
0.4
VDD = 2.3V
VDD = 2.5V
VDD = 2.3V
VDD = 2.5V
VDD = 3.0V
0.3
VDD = 3.0V
VDD =5.0V
VDD =5.0V
0.2
0
1
2
3
4
5
0
1
2
3
4
5
VCOM (V)
VCOM (V)
Figure 5. NC ON-Resistance vs. VCOM, 5V
Figure 6. NO ON-Resistance vs. VCOM, 5V
0.45
0.45
0.40
0.40
TAMB = +85°C
0.35
0.35
TAMB = +85°C
0.30
0.30
TAMB = +25°C
0.25
0.25
TAMB = +25°C
0.20
0.20
TAMB = -40°C
TAMB = -40°C
0.15
0.15
0
1
2
3
4
5
0
1
2
3
4
5
VCOM (V)
VCOM (V)
Figure 7. NC ON-Resistance vs. VCOM, 3V
Figure 8. NO ON-Resistance vs. VCOM, 3V
0.45
0.50
0.45
0.40
TAMB = +85°C
TAMB = +85°C
0.40
0.35
0.35
TAMB = +25°C
0.30
TAMB = +25°C
0.30
0.25
TAMB = -40°C
0.25
TAMB = -40°C
0.20
0.20
0.15
0.15
0
0.5
1
1.5
2
2.5
3
0
0.5
1
1.5
2
2.5
3
VCOM (V)
VCOM (V)
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Revision 1.03
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AS1746
Datasheet - Typical Operating Characteristics
Figure 9. Turn-ON/OFF vs. Temperature, VDD = 3V
Figure 10. Turn-ON/OFF Times vs. VSupply
35
90
80
70
60
50
NC
30
25
20
15
10
tON
NO
40
tON
NO
NC
30
tOFF
20
tOFF
10
0
-40
-15
10
35
60
85
1.5
2.5
3.5
4.5
5.5
VSupply (V)
Temperature (°C)
Figure 11. Logic Threshold Voltage vs. Supply Voltage
Figure 12. Charge Injection vs. COM Voltage
1.5
350
300
250
200
150
100
50
VIN rising
1
VIN falling
0.5
0
0
-50
-100
-150
0
1
2
3
4
5
6
0
1
2
3
4
5
6
VCOM (V)
Supply Voltage (V)
Figure 13. Frequency Response
Figure 14. THD+N vs. Frequency
0
0.05
ON- Response
-20
-40
0.04
0.03
0.02
0.01
0
Crosstalk
OFF- Isolation
-60
-80
-100
0.001
0.1
10
1000
10
1000
Frequency (Hz)
100000
Frequency(MHz)
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Revision 1.03
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AS1746
Datasheet - Detailed Description
8 Detailed Description
The AS1746 is a low on-resistance, low-voltage, asymmetrical dual-SPDT analog switch designed to operate from a
single +1.8 to +5.5V supply. The device is fully specified for nominal 3V applications and features break-before-make
switching and fast switching speeds (tON = 60ns max, tOFF = 35ns max).
The device provides 0.5Ω (max) RON for its NC switch, and 0.6Ω (max) RON for its NO switch for applications that
require asymmetrical loads.
Figure 15. AS1746 - Block Diagram – WL-CSP-10
AS1746
GND
C1
C2
C3
C4
B1
A1
A2
A3
A4
NC1
IN1
NC2
IN2
COM1
NO1
COM2
NO2
B4
V+
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Revision 1.03
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AS1746
Datasheet - Application Information
9 Application Information
Digital Control Inputs
The AS1746 logic inputs can handle up to +5.5V regardless of the supply voltage. For example, with a +3.3V supply,
INx may be driven low to GND and high to 5.5V. Driving INx rail-to-rail minimizes power consumption.
Analog Signal Levels
Analog signals that range over the entire supply voltage (V+ to GND) are passed with very little change in RON (see
Typical Operating Characteristics on page 6). The switches are bi-directional, so the NOx, NCx, and COMx pins can be
used as inputs or outputs.
Power Supply Sequencing
Proper power supply sequencing is recommended for all CMOS devices. The recommended sequence is as follows:
1. V+
2. NOx, NCx, COMx
Always apply V+ before applying analog signals, especially if the analog signal is not current limited. If this sequencing
is not possible, and if the analog inputs are not current limited to <20mA, add a small signal protection diode (D1) as
shown in Figure 16.
Overvoltage Protection
Using a protection diode will reduce the analog range to a diode voltage drop (approximately 0.7V) below V+ (for D1).
RON will increase slightly at low supply voltages.
Caution: The maximum supply voltage (V+) must not exceed +7V. Do not exceed the absolute maximum ratings
because stresses beyond the ratings listed in Absolute Maximum Ratings on page 3 may cause permanent
damage to the device.
Note: Protection diode D1 can also protect the device from some overvoltage conditions.
Figure 16. Overvoltage Protections using 2 External Blocking Diodes
AS1746
D1
Positive
Supply
V+
NO
COM
VGEN
GND
Note: No damage will result to the circuit shown in Figure 16 if the supply voltage is below the absolute maximum rat-
ing applied to an analog signal pin (NOx, NCx, or COMx).
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AS1746
Datasheet - Application Information
Test Circuits and Timing Diagrams
Figure 17. Switching Time
tR < 5ns
tF < 5ns
VIH
V+
AS1746
Logic
Input
50%
50%
tOFF
VIN
COMx
VIL
VOUT
NOx or NCx
†
VOUT
RLOAD
50Ω
CLOAD
35pF
0.9 x VOUT
0.9 x VOUT
Switch
Output
0
INx
tON
Logic
Input
GND
RLOAD
RLOAD + RON
VOUT = VNx
(
)
Logic input waveforms inverted for switches
that have the opposite logic sense.
†
Includes stray capacitance and fixture capacitance.
Figure 18. Break-Before-Make Interval
VIH
Logic
V+
AS1746
50%
NCx
VIN
Input
COMx
VOUT
†
0
NOx
RLOAD
50Ω
CLOAD
35pF
0.9 x VOUT
INx
VOUT
Logic
Input
GND
tD
†
Includes stray capacitance and fixture capacitance.
Figure 19. Charge Injection
V+
AS1746
VOUT
ΔVOUT
INx
VIL to
VIH
Off
Off
Off
INx
INx
COMx
NOx or NCx
On
VOUT
RGEN
On
CLOAD
GND
VGEN
Off
Q = ΔVOUT x CLOAD
INx depends on switch configuration; input polarity is determined
by the sense of the switches.
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Revision 1.03
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AS1746
Datasheet - Application Information
Figure 20. On-Loss, Off-Isolation, Crosstalk
Network Analyzer
VIN
50Ω
50Ω
AS1746
+5V
V+
COMx
10nF
NCx
INx
VOUT
Measure
Reference
NOx
50Ω
0V or
V+
GND
50Ω
50Ω
Off-isolation = 20LOG(VOUT/VIN)
On-loss = 20LOG(VOUT/VIN)
Crosstalk = 20LOG(VOUT/VIN)
Notes:
1. Measurements are standardized against short-circuit at all terminals.
2. Off-isolation is measured between COMx and the off NCx/NOx terminal of each switch.
3. Crosstalk is measured from one channel to all other channels.
4. Signal direction through the switch is reversed; worst values are recorded.
Figure 21. Channel On- Off-Capacitance
V+
AS1746
COMx
V+
10nF
1MHz
Capacitance
Analyzer
VIH or VIL
NCx or
NOx
INx
GND
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Revision 1.03
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AS1746
Datasheet - Package Drawings and Markings
10 Package Drawings and Markings
The device is available in a TDFN-10 (3x3mm) package and a WL-CSP-10 package.
Figure 22. TDFN-10 (3x3mm) Packagee
D2
D
SEE
D2/2
DETAIL B
B
L
PIN 1 INDEX AREA
(D/2 xE/2)
K
B
N N-1
(ND-1) X e
b
PIN 1 INDEX AREA
(D/2 xE/2)
aaa
C
2x
TOP VIEW
e
bbb
C
C A
ddd
BTM VIEW
e
Terminal Tip
DETAIL B
ccc
C
C
C
SEATING
PLANE
0.08
SIDE VIEW
Datum A or B
ODD TERMINAL SIDE
Symbol
A
Min
0.70
0.00
Typ
0.75
Max
Notes
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
Symbol
Min
Typ
Max
Notes
1, 2
0.80
0.05
D BSC
3.00
3.00
A1
0.02
E BSC
1, 2
A3
0.20 REF
0.40
D2
E2
θ
2.20
1.40
0º
2.70
1.75
14º
1, 2
L
0.30
0.50
1, 2
aaa
bbb
ccc
ddd
eee
ggg
0.15
1, 2
0.10
K
0.20
0.18
1, 2
0.10
b
0.25
0.50
10
0.30
1, 2, 5
0.05
e
0.08
N
1, 2
0.10
ND
5
1, 2, 5
Notes:
1. Figure 22 is shown for illustration only.
2. All dimensions are in millimeters; angles in degrees.
3. Dimensioning and tolerancing conform to ASME Y14.5 M-1994.
4. N is the total number of terminals.
5. The terminal #1 identifier and terminal numbering convention shall conform to JEDEC 95-1, SPP-012. Details of ter-
minal #1 identifier are optional, but must be located within the zone indicated. The terminal #1 identifier may be either
a mold or marked feature.
6. Dimension b applies to metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip.
7. ND refers to the maximum number of terminals on side D.
8. Unilateral coplanarity zone applies to the exposed heat sink slug as well as the terminals
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Revision 1.03
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AS1746
Datasheet - Package Drawings and Markings
Figure 23. WL-CSP-10 Package
A1
B
A
C
f
e
1
2
3
4
ob
e
D1
e
f
A2
f
e
e
f
E1
E
A
Dimensions
Symbol
Min
Typ
0.707
0.250
0.457
0.311
2.05
1.5
Max
0.737
0.270
0.467
0.321
A
A1
A2
b
0.677
0.230
0.447
0.301
4
3
2
1
D
D1
E
D
1.55
1
E1
e
0.5
f
0.275
B
A
C
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Revision 1.03
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AS1746
Datasheet - Ordering Information
11 Ordering Information
The device is available as the standard products shown in Table 4.
Table 4. Ordering Information
Ordering Code Marking
Description
Delivery Form
Package
AS1746-BTDR
AS1746-BTDT
ASK8 0.5/0.6Ω, Low-Voltage, Dual SPDT Analog Switch
Tray
TDFN-10 (3x3mm)
ASK8 0.5/0.6Ω, Low-Voltage, Dual SPDT Analog Switch Tape and Reel TDFN-10 (3x3mm)
AS1746-BWLT* ASK7 0.5/0.6Ω, Low-Voltage, Dual SPDT Analog Switch Tape and Reel
WL-CSP-10
* Available on request.
Note: All products are RoHS compliant and Pb-free.
Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect
For further information and requests, please contact us mailto:sales@austriamicrosystems.com
or find your local distributor at http://www.austriamicrosystems.com/distributor
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AS1746
Datasheet
Copyrights
Copyright © 1997-2009, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe.
Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged,
translated, stored, or used without the prior written consent of the copyright owner.
All products and companies mentioned are trademarks or registered trademarks of their respective companies.
Disclaimer
Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing
in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding
the information set forth herein or regarding the freedom of the described devices from patent infringement.
austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice.
Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for
current information. This product is intended for use in normal commercial applications. Applications requiring
extended temperature range, unusual environmental requirements, or high reliability applications, such as military,
medical life-support or life-sustaining equipment are specifically not recommended without additional processing by
austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show
deviations from the standard production flow, such as test flow or test location.
The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However,
austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to
personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or
consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the tech-
nical data herein. No obligation or liability to recipient or any third party shall arise or flow out of
austriamicrosystems AG rendering of technical or other services.
Contact Information
Headquarters
austriamicrosystems AG
Tobelbaderstrasse 30
A-8141 Unterpremstaetten, Austria
Tel: +43 (0) 3136 500 0
Fax: +43 (0) 3136 525 01
For Sales Offices, Distributors and Representatives, please visit:
http://www.austriamicrosystems.com/contact
www.austriamicrosystems.com
Revision 1.03
15 - 15
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