AMSCO AS1713

AS1713
D a ta S he e t
D i f f e r e n c e A m p l i f i e r, 1 0 M H z , 1 0 V / µ s , R a i l - t o - R a i l I / O
w i t h S h u td o w n
1 General Description
2 Key Features
The AS1713 is a low cost cmos difference amplifier providing extended common mode voltage range for a single rail 5V supply. Resistor trimming during final test
ensures a typical common mode rejection of 60dB. Low
input bias currents, 10MHz gain bandwidth, low total
harmonic distortion (THD) and a rail-to-rail output drive
capability of typically 200mA (@ 5V supply) provide support for a number of signal processing applications such
as audio line receivers, ground loop breakers and current sensing. Linearity is suitable for 12bit ADC measurement.
!
Constant Output Drive Capability: 50mA
!
Rail-to-Rail Input and Output
!
Supply Current: 1.6mA
!
Single-Supply Operation: 2.7 to 5.5V
!
Voltage Gain: 1
!
Gain-Bandwidth Product: 10MHz
!
High Slew Rate: 10V/µs
!
Power-Supply Rejection Ratio: -70dB
A classical single amplifier approach ensures that the
differential gain is determined by a simple ratio of two
internal resistors. A fixed gain of x1 is available.
!
Common Mode Rejection Ratio: -60dB
!
No Phase Reversal for Overdriven Inputs
!
Unity-Gain Stable for Capacitive Loads: Up to 100pF
!
Shutdown Mode Current: 1nA
!
MLPD (2x2mm) 8-pin package
Single ended input resistance is equalised (10kΩ ±10%)
at each input terminal. This feature provides additional
common mode rejection when long balanced input
cables connect at the input.
A EN pin reduces the quiescent current of the device.
3 Applications
The device is ideal for headphone amplifiers with ground
interference rejection, infotainment high drive audio line
buffers with ground interference rejection, audio differential-to-single-ended conversion and instrumentation
amplifier back-end.
Figure 1. Block Diagram
VDD
INN
EN
R1
R2
AS1713
–
SENSE
OUT
+
INP
R3
R4
REF
VSS
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AS1713
Data Sheet - P i n o u t
4 Pinout
Pin Assignments
Figure 2. Pin Assignments (Top View)
INP 1
8 REF
INN 2
7 SENSE
AS1713
EN 3
6 VSS
VDD 4
5 OUT
Pin Descriptions
Table 1. Pin Descriptions
Pin Number
1
2
Pin Name
INP
INN
3
EN
4
5
VDD
OUT
6
VSS
7
8
SENSE
REF
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Description
Non-inverting Input.
Inverting Input.
Active-Low Enable Input. A logic low on this pin shuts down the device.
VSS: device in shutdown.
VDD: normal operation.
Positive Supply Input.
Amplifier Output.
Negative Supply Input. This pin must be connected to ground in single-supply
applications.
Sense Input. Ground this pin when external inverting gain control is required.
Reference Input. Reference to non-inverting input resistor network.
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AS1713
Data Sheet - A b s o l u t e M a x i m u m R a t i n g s
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 Characteristics 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
Supply Voltage (VDD to VSS)
Supply Voltage (All Other Pins)
VSS
- 0.3
Output Short-Circuit Duration to
VDD or VSS
Max
Units
+7
V
VDD
+ 0.3
V
1
s
Comments
Thermal Resistance ΘJA
33
ºC/W
on PCB
ESD
1
kV
HBM MIL-Std. 883E 3015.7 methods
Operating Temperature Range
-40
Storage Temperature Range
-65
Junction Temperature
Package Body Temperature
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+85
ºC
+150
ºC
+150
ºC
+260
ºC
Revision 1.01
The reflow peak soldering temperature (body
temperature) specified is in accordance with
IPC/JEDEC J-STD-020C “Moisture/Reflow
Sensitivity Classification for Non-Hermetic
Solid State Surface Mount Devices”.
The lead finish for Pb-free leaded packages is
matte tin (100% Sn).
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AS1713
Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6 Electrical Characteristics
DC Electrical Characteristics
VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = VDD/2, RLOAD = Infinite, VEN = VDD, TAMB = -40 to +85ºC. Typical values at
TAMB = 25°C.
Table 3. DC Electrical Characteristics
Symbol
Parameter
Condition
Min
VDD
Supply Voltage Range
Inferred from Power Supply
Rejection Ratio Test
VOFFSET
Max
Unit
2.7
5.5
V
Input Offset Voltage
-1.5
+1.5
mV
RSEIN
Single-Ended
Input Resistance
9
11
kΩ
VCM
Common Mode Input
Voltage Range
Inferred from Common Mode
1
Rejection Ratio
VSS
VDD
V
CMRR
Common Mode
Rejection Ratio
VSS < VCM < VDD
-45
-60
dB
PSRR
Power Supply Rejection Ratio
VDD = 2.7 to 5.5V
-60
-70
dB
ROUT
Shutdown Output Impedance
VEN = 0V
130
Ω
VOUT-SHDNN
Shutdown Output Voltage
VEN = 0V, RLOAD = 2kΩ to VDD
Output Voltage Swing
VOUT
IOUT
Output Voltage
Output Source/Sink Current
IDD
Quiescent Supply Current
IDD-SHDNN
Shutdown Supply Current
VDD - VOH or
VOL - VSS
VDD - VOH or
VOL - VSS
10
170
400
RLOAD = 32Ω
350
650
RLOAD = 200Ω
70
120
RLOAD = 2kΩ
9
20
ILOAD = 10mA,
VDD = 2.7V
55
100
ILOAD = 50mA,
VDD = 5V
100
200
mV
mV
mV
VDD = 2.7V,
V- = VCM, V+ = VCM±100mV
100
VDD = 5.0V,
V- = VCM, V+ = VCM±100mV
200
mA
VDD = 2.7V, VCM = VDD/2
1.6
3.2
VDD = 5.0V, VCM = VDD/2
2.3
4.6
VEN = 0V, VDD = 2.7V
1
2000
Shutdown Mode
VSS +
0.3
Normal Operation
VDD 0.3
VSS < VEN < VDD
50
EN Logic Threshold
EN Input Bias Current
Typ
mA
1
nA
V
pA
1. Guaranteed by design.
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AS1713
Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s
AC Electrical Characteristics
VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = VDD/2, RLOAD = Infinite, VEN = VDD, TAMB = -40 to +85ºC. Typical values at
TAMB = 25°C.
Table 4. AC Electrical Characteristics
Symbol
Parameter
Conditions
GBWP
Gain-Bandwidth Product
VCM = VDD/2
fC
Min
Typ
Max
Units
4
MHz
Cut-off Frequency
8.5
MHz
SR
Slew Rate
5
V/µs
PM
Phase Margin
60
deg
GM
Gain Margin
1
10
dB
THD+N
Total Harmonic Distortion
Plus Noise
60
dBc
CIN
Input Capacitance
2
pF
en
Voltage-Noise Density
1
Capacitive-Load Stability
f = 10kHz, VOUT = 2VP-P, AVCL = 1V/V
f = 1kHz
40
f = 10kHz
30
√Hz
AVCL = 1V/V, no sustained oscillations
100
pF
nV/
tSHDN
Shutdown Time
1
µs
tENABLE
Enable Time from Shutdown
7
µs
tON
Power-Up Time
20
ns
1. Guaranteed by design.
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AS1713
Data Sheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
7 Typical Operating Characteristics
VDD = 2.7V; VSS = 0V, VCM = VDD/2, VOUT = VDD/2, RLOAD = ∞, VEN = VDD TAMB = +25ºC (unless otherwise specified).
Figure 3. Gain and Phase vs. Frequency
Figure 4. Gaind and Phase vs. freq.; CLOAD = 100pF
100
210
100
210
Gain
Gain
150
60
40
120
20
90
0
-20
-40
1E-05
0.001
0.1
120
20
90
60
0
60
30
-20
30
-40
1E-05
Frequency (kHz)
100
-10
90
-20
80
-30
70
CMRR (dB)
PSRR (dB)
0.1
0
1000 100000
10
Figure 6. CMRR vs. Frequency
0
-40
-50
-60
60
50
40
-70
30
-80
20
-90
10
-100
100
0.001
Frequency (kHz)
Figure 5. PSRR vs. Frequency
1
150
Phase
40
0
1000 100000
10
180
Phase (deg)
Phase
80
Gain (dB)
Gain (dB)
60
180
Phase (deg)
80
10000
0
0.00001
1000000
0.001
Frequency (kHz)
0.1
10
1000
Frequency (kHz)
Figure 7. Supply Current vs. Temperature
Figure 8. Shutdown Current vs. Temperature
3
100
Supply Current (nA)
Supply Current (mA)
2.5
2
1.5
1
10
1
0.5
Vdd = 2.7V
Vdd = 2.7V
Vdd = 5.0V
0
-40
-15
10
35
60
Vdd = 5.0V
85
0.1
-40
Temperature (°C)
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-15
10
35
60
85
Temperature (°C)
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AS1713
Data Sheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
Figure 9. Supply Current vs. CMRR
Figure 10. Input Voltage Noise vs. Frequency
10000
Input Voltage Noise (nV/√Hz)
3
Supply Current (mA)
2.5
2
1.5
1
0.5
1000
100
10
Vdd = 2.7V
Vdd = 5.0V
1
0.0001
0
0
1
2
3
4
5
0.01
Common-Mode Voltage (V)
Figure 11. Output Swing High vs. Temp.; VDD = 2.7V
100
10000
Figure 12. Output Swing Low vs. Temp.; VDD = 2.7V
200
200
180
180
160
160
VOUT - VSS (mV)
VOUT - VSS (mV)
1
Frequency (kHz)
140
120
100
80
60
140
120
100
80
60
40
40
10mA
10mA
200Ohm
20
-40
-15
10
35
60
200Ohm
20
-40
85
-15
Temperature (°C)
Figure 13. Output Swing High vs. Temp.; VDD = 5.5V
35
60
200
180
180
160
160
140
120
100
80
60
140
120
100
80
60
40
40
50mA
50mA
200Ohm
20
-40
85
Figure 14. Output Swing Low vs. Temp.; VDD = 5.5V
200
VOUT - VSS (mV)
VOUT - VSS (mV)
10
Temperature (°C)
-15
10
35
60
200Ohm
85
20
-40
Temperature (°C)
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-15
10
35
60
85
Temperature (°C)
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AS1713
Data Sheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
Figure 15. VOUT vs. IOUT, sourcing
Figure 16. VOUT vs. IOUT, sinking
2
6
Output Voltage (V)
Output Voltage (V)
5.0V
5
4
3
2.7V
2
1.5
1
0.5
t > 10s
1
t > 10s
2.7V
t < 1s
t > 10s
0
50
100
150
200
250
300
t > 10s
5.0V
t < 1s
0
t < 1s
t < 1s
0
0
350
Output Current (mA)
50
100
150
200
250
300
Output Current (mA)
Figure 18. Transient Response; VIN = 100mV,
CLOAD = 100pF
OUT
OUT
50mV/DIV
50mV/DIV
IN
IN
Figure 17. Transient Response; VIN = 100mV,
CLOAD = 10pF
500ns/Div
500ns/Div
50mV/DIV
OUT
OUT
50mV/DIV
IN
Figure 20. Transient Response; VIN = 1V,
CLOAD = 100pF
IN
Figure 19. Transient Response; VIN = 1V,
CLOAD = 10pF
500ns/Div
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500ns/Div
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AS1713
Data Sheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
50mV/DIV
OUT
OUT
50mV/DIV
IN
Figure 22. Transient Response; VIN = 2V,
CLOAD = 100pF
IN
Figure 21. Transient Response; VIN = 2V,
CLOAD = 10pF
500ns/Div
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500ns/Div
Revision 1.01
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AS1713
Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
8 Application Information
Ground Loop Interference Suppression:
In real life situations the signal source and the amplifier are often located a distance apart, but still share the same
ground arrangement with a number of other circuits. The ground system is never perfect as it has a small distributed
resistance, capacitance and inductance. Thus, the ground appears as a distributed impedance.
As a various current flow into and out of the ground system exists, a small voltage drop will inevitably occur, causing
different voltages within the ground. In Figure 23 and Figure 24, RGND denotes the ground resistance between the
input signal ground and the output signal ground. The voltage drop across RGND should ideally have no effect on individual circuit performance.
In the single ended inverting amplifier shown in Figure 23, the amplifier sees VIN and VGND in series, so the amplifier
output is:
VOUT = - [R2/R1] [VIN+VGND]
(EQ 1)
Figure 23. Single Ended Inverting Amplifier
R1
R2
–
VIN
+
+
+
VOUT
-
RGND
+ VGND -
VGND is part of the output expression and is known as ground loop interference, ground bounce or even common
impedance crosstalk. In some situations this interference signal can be close to or the same value as the wanted input
signal such as in sensor applications.
A difference amplifier is a simple method used to reduce the effect of ground interference. VIN is regarded as a differential input signal, and VGND a common mode signal. From Figure 24, the amplifier output is:
VOUT = - [R2/R1] VIN
(EQ 2)
Figure 24. Difference Amplifier
INN
VIN
+
EN
R1
R2
–
AS1713
OUT
+
INP
SENSE
R3
R4
REF
+
VOUT
-
RGND
+ VGND -
The additional cost of extra matched resistors is offset by the rejection of the unwanted common mode ground interference.
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AS1713
Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
Differential Input / Output Buffer
Figure 25. Differential Input / Output Buffer
VDD
INN
VIN
Differential
Input
EN
INP
R2
R1
AS1713
R3
–
+
SENSE
OUT
R4
REF
VSS
VOUT
Differential
Output
VDD
INN
EN
INP
R1
AS1713
R3
R2
–
+
SENSE
OUT
R4
REF
VDD/2
VSS
Rail-to-Rail Input Stage
The AS1713 CMOS op amps have parallel connected n- and p-channel differential input stages that combine to accept
a common-mode range extending to both supply rails. The n-channel stage is active for common-mode input voltages
typically greater than (VSS + 1.2V), and the p-channel stage is active for common-mode input voltages typically less
than (VDD - 1.2V).
Rail-to-Rail Output Stage
The minimum output is within millivolts of ground for single- supply operation, where the load is referenced to ground
(VSS). Figure 26 shows the input voltage range and the output voltage swing of an AS1713 connected as a voltage follower. The maximum output voltage swing is load dependent although it is guaranteed to be within 500mV of the positive rail (VDD = 2.7V) even with maximum load (32Ω to ground) as shown in Figure 27.
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AS1713
Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
1V/DIV
OUT
OUT
1V/DIV
IN
Figure 27. Rail-to-Rail Input / Output Range;
VIN = VDD = 3.0V, RLOAD = 32Ω
IN
Figure 26. Rail-to-Rail Input / Output Range;
VIN = VDD = 3.0V, RLOAD = 100kΩ
2µs/Div
2µs/Div
Note: The absolute maximum ratings (see page 3) for power dissipation and output short-circuit duration (10s, max)
must be adhered since the output current can exceed 200mA (see Typical Operating Characteristics on page
6).
Shutdown
When EN is pulled to low, the supply current drops to 0.5µA, the amplifier is disabled and the output is driven to VSS.
Pulling EN to high enables the amplifier. When exiting shutdown, there is a 6µs delay before the amplifier output
becomes active.
Note: Because the output is actively driven to VSS in shutdown, any pullup resistor on the output causes a current
drain from the supply.
Power-Up
The AS1713 typically settle within 5µs after power-up.
Power Supplies and Layout
The AS1713 can operate from a single 2.7V to 5.5V supply or from dual ±1.35V to ±2.5V supplies. Good design
improves device performance by decreasing the amount of stray capacitance at the op amp inputs/outputs.
!
For single-supply operation, bypass the power supply with a 0.1µF ceramic capacitor.
!
For dual-supply operation, bypass each supply to ground.
!
Decrease stray capacitance by placing external components close to the op amp pins, minimizing trace and lead
lengths.
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AS1713
Data Sheet - P a c k a g e D r a w i n g s a n d M a r k i n g s
9 Package Drawings and Markings
Figure 28. MLPD (2x2mm) 8-pin Package
Table 5. MLPD (2x2mm) 8-pin package Dimensions
Symbol
Min
Typ
Max
A
0.51
0.55
0.60
A1
0.00
0.02
0.05
A3
0.15 ref
aaa
0.15
bbb
0.10
ccc
0.10
k
0.20
b
0.20
0.25
0.30
e
0.50
Symbol
D
E
D2
E2
L
N
ND
NE
Min
1.45
0.75
0.225
Typ
2.00
2.00
1.60
0.90
0.325
8
4
--
Max
1.70
1.00
0.425
Notes:
1. Dimensioning and tolerancing conform to ASME Y14.5M-1994.
2. All dimensions are in millimeters, angle is in degrees.
3. Terminal #1 identifier and terminal numbering convention shall conform to JESD 95-1 SPP-012. Details of terminal #1 identifier are optional, but must be located within the area indicated. The terminal #1 identifier may be
either a mold, embedded metal or mark feature.
4. Dimension b applies to metallized terminal and is measured between 0.15 and 0.30mm from terminal tip.
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AS1713
Data Sheet - O r d e r i n g I n f o r m a t i o n
10 Ordering Information
The device is available as the standard products shown in Table 6.
Table 6. Ordering Information
Model
AS1713-BTDT
Marking
Description
ABB
Difference Amplifier, 10MHz, 10V/µs,
Rail-to-Rail I/O with Shutdown
Delivery Form
Package
Tape and Reel MLPD (2x2mm) 8-pin
All devices are RoHS compliant and free of halogene substances.
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AS1713
Data Sheet
Copyrights
Copyright © 1997-2009, austriamicrosystems AG, Schloss Premstaetten, 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 lifesustaining 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 technical 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
A-8141 Schloss Premstaetten, 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-us
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