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PDF AS1710 Data sheet ( Hoja de datos )
| Número de pieza | AS1710 | |
| Descripción | High-Output-Drive 10MHz 10V/us Rail-to-Rail I/O Op Amps | |
| Fabricantes | austriamicrosystems AG | |
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AS1710/AS1712
High-Output-Drive, 10MHz, 10V/µs, Rail-to-Rail I/O
Op Amps with Shutdown
Data Sheet
1 General Description
2 Key Features
The AS1710/AS1712 are low-offset, high-output CMOS
op amps that deliver 200mA of peak output current from
a single supply (2.7 to 5.5V).
These devices were specifically designed to drive typical
headset levels (32Ω), as well as bias RF power amplifi-
ers for wireless handset applications.
The devices are available as the standard products
shown in Table 1. See also Ordering Information on
page 16.
Table 1. Standard Products
Model
AS1710A
Description
Single Op Amp
with Shutdown
Package
SC70-6
AS1710B
AS1712A
Single Op Amp
Quad Op Amp
w/Shutdown
SC70-5
TQFN-16
3x3mm
These rail-to-rail I/O, wide-bandwidth amplifiers exhibit a
high slew rate of 10V/µs and a gain-bandwidth product
of 10MHz.
The integrated shutdown feature (not included in B ver-
sions) drives the output low.
These devices operate over the entire automotive tem-
perature range (-40°C to +125°C).
Figure 1. Typical Application
! Constant Output Drive Capability: 50mA
! Rail-to-Rail Input and Output
! Supply Current: 1.6mA
! Single-Supply Operation: 2.7 to 5.5V
! Gain-Bandwidth Product: 10MHz
! High Slew Rate: 10V/µs
! Voltage Gain: 100dB (RLOAD = 100kΩ)
! Power-Supply Rejection Ratio: -85dB
! No Phase Reversal for Overdriven Inputs
! Unity-Gain Stable for Capacitive Loads: Up to 100pF
! Shutdown Mode (AS1710A) Current: 1nA typ
! Package Types:
- SC70-6
- SC70-5
- TQFN-16 3x3mm
3 Applications
The devices are ideal for portable/battery-powered
audio applications, portable headphone speaker drivers
(32Ω), hands-free mobile phone kits, TFT panels, sound
ports/cards, set-top boxes, biasing controls, DAC con-
verter buffers, transformer/line drivers, motor drivers,
and any other battery-operated audio device.
Audio In
Left
CIN
RIN
VBIAS
Audio In
Right
CIN
RIN
RF
–
AS1710
+
+
AS1710
–
RF
COUT
+
Headphone Jack
to 32Ω Stereo
Headset
COUT
+
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Revision 1.06
1 - 17
1 page  
AS1710/AS1712
Data Sheet - Electrical Characteristics
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AC Electrical Characteristics
VDD = 2.7V, VSS = 0V, VCM = VDD/2, VOUT = VDD/2, RLOAD = Infinite, VSHDNN = VDD, TAMB = -40 to +125ºC. Typical val-
ues at TAMB = 25°C.
Table 5. AC Electrical Characteristics
Symbol
GBWP
FPBW
Parameter
Gain-Bandwidth Product
Full-Power Bandwidth
Conditions
VCM = VDD/2
VOUT = 2VP-P, VDD = 5V
Min Typ Max Units
10 MHz
2.5 MHz
SR Slew Rate
10 V/µs
PM Phase Margin
70 deg
GM
THD+N
CIN
en
tSHDN
tENABLE
tON
Gain Margin 1
Total Harmonic Distortion
Plus Noise
Input Capacitance
Voltage-Noise Density1
Capacitive-Load Stability
Shutdown Time
(AS1710A)
Enable Time from Shutdown
(AS1710A)
Power-Up Time
f = 10kHz, VOUT = 2VP-P, AVCL = 1V/V
f = 1kHz
f = 10kHz
AVCL = 1V/V, no sustained oscillations
15
0.05
6
15
10
100
1
7
20
dB
%
pF
nV/
√Hz
pF
µs
µs
ns
1. Guaranteed by design.
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Revision 1.06
5 - 17
5 Page 
AS1710/AS1712
Data Sheet - Application Information
Figure 23. Rail-to-Rail Input/Output Range, 100kΩ
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Figure 24. Rail-to-Rail Input/Output Range, 32Ω
VCC = 3.0V,
RLOAD = 100kΩ
2.5µs/Div
VCC = 3.0V,
RLOAD = 32Ω
2.5µs/Div
Note: The absolute maximum ratings (see page 3) for power dissipation and output short-circuit duration (10s, max)
must be adhered to since the output current can exceed 200mA (see Typical Operating Characteristics on
page 6).
Input Capacitance
The parallel-connected differential input stages for rail-to-rail operation results in relatively large input capacitance CIN
(6pF typ). This introduces a pole at frequency (2πR′CIN)-1, where R′ is the parallel combination of the gain-setting
resistors for the inverting or non-inverting amplifier configuration (Figure 25). If the pole frequency is less than or com-
parable to the unity-gain bandwidth (10MHz), the phase margin is reduced, and the amplifier exhibits degraded AC
performance through either ringing in the step response or sustained oscillations.
Figure 25. Inverting and Non-inverting Amplifiers with Feedback Compensation
R
VIN
Inverting
CF
RF
–
AS1710
+
R′ = R II RF
RFCF = RCIN
VIN
Non-Inverting
+
AS1710
–
VOUT
RF
CF
R
VOUT
The pole frequency is 10MHz when R′ = 2kΩ. To maximize stability, R′ << 2kΩ is recommended.
To improve step response when R′ > 2kΩ, connect a small capacitor (CF) between the inverting input and output. CF
can be calculated by:
CF = 6(R/RF) [pf]
(EQ 6)
Where:
RF is the feedback resistor.
R is the gain-setting resistor.
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