GMT G1201P1U Rail-to-rail i/o, 100ma output single-supply amplifier Datasheet

G1201
Global Mixed-mode Technology Inc.
Rail-to-Rail I/O, 100mA Output Single-Supply Amplifiers
Features
General Description
„
The G1201 is dual rail-to-rail input and output single-supply amplifiers featuring 100mA output drive
current. This high output current makes these amplifiers excellent for driving either resistive or capacitive
loads. AC performance is very good with 3.5MHz
bandwidth, 6.2V/µs-slew rate and low distortion. All
are guaranteed to operate from a +3 volt single supply
as well as a +5 volt supply.
„
„
„
„
„
„
Single-Supply Operation: 2.2 Volts to 6 Volts
High Output Current: ±100mA
Wide Bandwidth: 3.5 MHz
Slew Rate: 6.2 V/µs
No Phase Reversal
Unity Gain Stable
Rail-to-Rail Input and Output
Applications
The very low input bias currents enable the G1201 to
be used for integrators and diode amplification and
other applications requiring low input bias current. Allowing low current applications to control high current
loads.
„
Multimedia Audio
„ LCD Driver
„ ASIC Input or Output Amplifier
„ Headphone Driver
Applications include audio amplification for computers,
sound ports, sound cards and set-top boxes. The
G1201 is very stable and capable of driving heavy
capacitive loads.
The ability to swing rail-to-rail at the inputs and outputs
enables designers to buffer CMOS ADC/DACs, ASICs
or other wide output swing devices in single-supply
systems.
Ordering Information
ORDER ORDER NUMBER
NUMBER
(Pb free)
G1201P1U
G1201P1Uf
TEMP.
RANGE
PACKAGE
-40°C to +85°C
SOP-8
Note: P1: SOP-8
U: Tape & Reel
Pin Configuration
G1201
OUT A
1
8
V+
-IN A
2
7
OUT B
+IN A
3
6
-IN B
V-
4
5
+IN B
SOP-8
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver 1.2
Jul 24, 2005
1
G1201
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings*
Junction Temperature Range….......…-65°C to +150°C
Reflow Temperature (soldering, 10sec)…...........260°C
θJA1…………..……………….……………………150°C/W
Supply Voltage (VS)…………………..…...…………+7V
Input Voltage ………………….…………...…GND to VS
Differential Input Voltage**…………………..………±6V
Storage Temperature Range…………-65°C to +150°C
Operating Temperature Range……..…-40°C to +85°C
θJA is specified for the worst case conditions, θJA is specified for
device soldered onto a circuit board for surface-mount packages.
1
*Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only;
the functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
**For supplies less than +6V, the differential input voltage is equal to ±VS.
Electrical Characteristics (VS = +3.0V, VCM = 1.5V, TA=+25°C unless otherwise noted)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNIT
------0
5
50
25
15
250
125
3
mV
pA
pA
V
---
60
---
dB
---
80
---
dB
2.85
---
2.91
60
--100
V
mV
---
±100
---
mA
63
---
dB
1.5
2.5
mA
Input Characteristics
Offset Voltage
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
VOS
IB
IOS
VCM
CMRR
AVO
VCM = 0V to 3V
RL = 2kΩ
VO = 0.5V to 2.5V
Output Characteristics
Output Voltage High
Output Voltage Low
VOH
VOL
Output Current
Power Supply
IOUT
Power Supply Rejection Ratio
PSRR
IL = 10mA
IL = 10mA
fi= 1k
Vripple(PEAK) = 1V
VO = 0V
---
Supply Current/Amplifier
Dynamic Performance
ISY
Slew Rate
Settling Time
Gain Bandwidth Product
SR
ts
GBP
RL = 2kΩ
---
2.8
---
V/µs
To 0.1%
-----
2.5
2.2
-----
µs
MHz
CS
f = 1kHz
RL = 32Ω
---
70
---
dB
50
---
dB
Channel Separation
Total Harmonic Distortion
THD
f = 1kHz
AV = -1
RL=32Ω
VO(P-)=2.45V
---
---
Note: Specifications subject to change without notice.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver 1.2
Jul 24, 2005
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G1201
Global Mixed-mode Technology Inc.
Electrical Characteristics (VS = +5.0V, VCM = 2.5V, TA=+25°C unless otherwise noted)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNIT
Input Characteristics
Offset Voltage
VOS
---
5
15
mV
Input Bias Current
Input Offset Current
IB
IOS
-----
50
25
500
250
pA
pA
0
40
70
--65
90
5
-----
V
dB
dB
Input Voltage Range
Common-Mode Rejection Ratio
VCM
CMRR
AVO
VCM = 0V to 5V
RL = 2kΩ
VO = 0.5V to 4.5V
Output Voltage High
VOH
IL = 10mA
4.90
4.94
---
V
Output Voltage Low
Output Current
Power Supply
VOL
IOUT
IL = 10mA
-----
50
±100
100
---
mV
mA
fi= 1kHz
Vripple(PEAK) = 1V
50
66
---
dB
VO = 0V
---
3.5
6
mA
RL = 2kΩ
RL = 32Ω
VO(P-P) = 4.2V
THD = 50dB
To 0.1%
---
6.2
---
V/μs
---
30
---
kHz
---
1.3
---
μs
-----
3.5
70
-----
MHz
dB
---
50
---
dB
Large Signal Voltage Gain
Output Characteristics
Power Supply Rejection Ratio
Supply Current/Amplifier
Dynamic Performance
Slew Rate
Full-Power Bandwidth
Settling Time
PSRR
ISY
SR
BWp
ts
Gain Bandwidth Product
Channel Separation
GBP
CS
Total Harmonic Distortion
THD
f = 1kHz, RL = 32Ω
f = 1kHz, AV = -1 RL = 32Ω, VO(P-P) = 4.3V
Note: Specifications subject to change without notice.
Caution
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 2000V readily accumulate
on the human body and test equipment and can discharge without detection.
Although the G1201 feature proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges.
Therefore, proper ESD precautions are recommended
to avoid performance degradation or loss of functionality.
any internal short-circuit protection circuitry. Direct
connection of the G1201’s output to the positive supply in single-supply applications will destroy the device.
In those applications where some protection is needed,
but not at the expense of reduced output voltage
headroom, a low value resistor in series with the output, as shown in Figure 1, can be used. The resistor,
connected within the feedback loop of the amplifier,
will have very little effect on the performance of the
amplifier other than limiting the maximum available
output voltage swing.
Applications
Theory of Operation
The G1201 is an all-CMOS, high output current drive,
rail-to-rail input/output operational amplifier. Its high
output current drive and stability with heavy capacitive
loads makes the G1201 an excellent choice as a drive
amplifier.
+5V
VIN
+
_
RX
20Ω
VOUT
Short-Circuit Protection
As a result of the design of the output stage for maximum load current capability, the G1201 does not have
Figure 1. Output Short-Circuit Protection
TEL: 886-3-5788833
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Ver 1.2
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G1201
Global Mixed-mode Technology Inc.
Input Overvoltage Protection
As with any semiconductor device, whenever the condition exists for the input to exceed either supply voltage, the device’s input overvoltage characteristic must
be considered. When an overvoltage occurs, the amplifier could be damaged depending on the magnitude
of the applied voltage and the magnitude of the fault
current. Although not shown here, when the input
voltage exceeds either supply by more than 0.6V,
pn-junctions internal to the G1201 energize allowing
current to flow from the input to the supplies. the
G1201 does not have any internal current limiting resistors, so fault currents can quickly rise to damaging
levels.
The audio signal is then ac-coupled to each input
through a 10µF capacitor. A large value is needed to
ensure that the 20Hz audio information is not blocked.
If the input already has the proper dc bias, the ac coupling and biasing resistors are not required. A 270µF
capacitor is used at the output to couple the amplifier
to the headphone. This value is much larger than that
used for the input because of the low impedance of
the head-phones, which can range from 32Ω to 600Ω.
An additional 16Ω resistor is used in series with the
output capacitor to protect the op amp’s output stage
by limiting capacitor discharge current. When driving a
32Ω load, the circuit exhibits less than 0.3% THD+N at
output drive levels of 4.2 VP-P.
This input current is not inherently damaging to the
device as long a it is limited to 5 mA or less. For the
G1201, once the input voltage exceeds the supply by
more than 0.6V the input current quickly exceeds 5
mA. If this condition continues to exist, an external
series resistor should be added. The size of the resistor is calculated by dividing the maximum overvoltage
by 5 mA. For example, if the input voltage could reach
10V, the external resistor should be (10V/ 5mA) = 2kΩ.
This resistance should be placed in series with either
or both inputs if they are exposed to an overvoltage
condition.
+V + 5V
+V + 5V
1µF 0.1 µF
50kΩ
+
10µF
50kΩ
LEFT
INPUT
+
10µF
_
1/2
G1201
16Ω 270µF
+
+
LEFT
HEADPHONE
50kΩ
100kΩ
+V
A Single-Supply Headphone Amplifier
Because of its speed and large output drive, the
G1201 make an excellent headphone driver, as illustrated in Figure 2. Its low supply operation and
rail-to-rail inputs and outputs give a maximum signal
swing on a single +5V supply. To ensure maximum
signal swing available to drive the headphone, the
amplifier inputs are biased to V+/2, which in this case
is 2.5V. The 100kΩ resistor to the positive supply is
equally split into two 50 kΩ resistors, with their common point bypassed by 10µF to prevent power supply
noise from contaminating the audio signal.
50kΩ
+
10µF
50kΩ
RIGHT
INPUT
+
10µF
_
1/2
G1201
+
16Ω 270µF
+
RIGHT
HEADPHONE
50kΩ
100kΩ
Figure 2. A Single-Supply, Stereo Headphone
Driver
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver 1.2
Jul 24, 2005
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Global Mixed-mode Technology Inc.
G1201
Input Common Mode Voltage Range Figure
Test Condition:TA = 25°C, AV=1
V+ = 5V, V- = 0V, RL = 2KΩ
V+ = 5V, V- = 0V, RL = 250Ω
V+ = 3V, V- = 0V, RL = 2KΩ
V+ = 3V, V- = 0V, RL = 250Ω
TEL: 886-3-5788833
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Global Mixed-mode Technology Inc.
G1201
Output Swing Range Voltage Figure
Test Condition:TA=25°C, AV= -1
V+ = 2.5V , V- = - 2.5V , RL=2kΩ
V+ = 1.5V , V- = - 1.5V , RL=2kΩ
V+ = 2.5V , V- = - 2.5V , RL=250Ω
V+ = 1.5V , V- = - 1.5V , RL=250Ω
V+ = 2.5V , V- = - 2.5V , RL=32Ω
V+ = 1.5V , V- = - 1.5V , RL=32Ω
V+ = 2.5V , V- = - 2.5V , RL=16Ω
V+ = 1.5V , V- = - 1.5V , RL=16Ω
TEL: 886-3-5788833
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Ver 1.2
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G1201
Global Mixed-mode Technology Inc.
Large Signal Transient Response Figure
Test Condition:TA=25°C, AV=1 , RL = 2kΩ
V+ = 2.5V, V- = -2.5V
V+ = 2.5V, V- = -2.5V
SR (rising) = 2.5V/408ns = 6.14V/µs
SR (falling) = 2.5V/327ns = 7.65 V/µs
V+ = 1.5V, V- = -1.5V
V+ = 1.5V, V- = -1.5V
SR (rising) = 1.5V/522ns = 2.87 V/µs
SR (falling) = 1.5V/434ns = 3.45 V/µs
Test Condition: TA=25°C, V+ = 2.5V, V- = -2.5V
Test Condition: TA=25°C, V+ = 2.5V, V- = -2.5V
Power Supply Ripple Rejection vs. Frequency
-70
60.0
-90
40.0
-110
-130
20.0
0.0
0.1
1
10
100
1000
-150
10000
Power Supply Rejection - dB
80.0
Gain - dB
-50
Phase - degree
Open-Loop Gain & Phase vs. Frequency
100.0
Frequency - kHZ
65.0
55.0
45.0
PSRR +
35.0
PSRR -
25.0
15.0
5.0
0.1
1
10
100
Frequency - kHZ
1000
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Ver 1.2
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Global Mixed-mode Technology Inc.
G1201
Recommended Minimum Footprint
SOP-8
TEL: 886-3-5788833
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Ver 1.2
Jul 24, 2005
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G1201
Global Mixed-mode Technology Inc.
Package Information
C
E
H
L
D
θ
7 ° (4X)
A2
A
A1
y
e
B
Note:
1. Package body sizes exclude mold flash and gate burrs
2. Dimension L is measured in gage plane
3. Tolerance 0.10mm unless otherwise specified
4. Controlling dimension is millimeter converted inch dimensions are not necessarily exact.
MIN.
DIMENSION IN MM
NOM.
MAX.
MIN.
DIMENSION IN INCH
NOM.
A
A1
1.35
0.10
1.60
-----
1.75
0.25
0.053
0.004
0.063
-----
0.069
0.010
A2
B
C
D
E
----0.33
0.19
4.80
3.80
1.45
-----------------
----0.51
0.25
5.00
4.00
----0.013
0.007
0.189
0.150
0.057
-----------------
----0.020
0.010
0.197
0.157
e
H
----5.80
1.27
-----
----6.20
----0.228
0.050
-----
----0.244
L
y
θ
0.40
-----
---------
1.27
0.10
0.016
-----
---------
0.050
0.004
0º
-----
8º
0º
-----
8º
SYMBOL
MAX.
Taping Specification
PACKAGE
Q’TY/REEL
SOP-8
2,500 ea
Feed Direction
Typical SOP Package Orientation
GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver 1.2
Jul 24, 2005
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