GS8721/22/24/21N
11MHZ CMOS Rail-to-Rail IO Opamps
Features
•
•
•
•
•
•
•
•
Single-Supply Operation from +2.1V ~ +5.5V
Rail-to-Rail Input / Output
Gain-Bandwidth Product: 11MHz (Typ.)
Low Input Bias Current: 1pA (Typ.)
Low Offset Voltage: 3.5mV (Max.)
High Slew Rate: 9V/µs
Settling Time to 0.1% with 2V Step: 0.3µs
Low Noise : 8nV/ Hz @10kHz
•
•
•
Quiescent Current: 1.1mA per Amplifier (Typ.)
Operating Temperature: -40°C ~ +125°C
Small Package:
GS8721 Available in SOT23-5, SOP-8 and SC70-5
Packages
GS8722 Available in SOP-8 and MSOP-8 Packages
GS8724 Available in SOP-14 and TSSOP-14 Packages
GS8721N Available in SOT23-6 and SC70-6 Packages
General Description
amplifier at 5V. The GS8721N has a power-down disable feature that reduces the supply current to 90nA. The GS872X are
designed to provide optimal performance in low voltage and low noise systems. They provide rail-to-rail output swing into
heavy loads. The input common mode voltage range includes ground, and the maximum input offset voltage is 3.5mV for
2.1V to 5.5V. The GS8721 single is available in Green SC70-5, SOT23-5 and SOP-8 packages. The GS8722 dual is available
in Green SOP-8 and MSOP-8 packages. The GS8724 Quad is available in Green SOP-14 and TSSOP-14 packages. The
GS8721N single with shutdown is available in Green SOT23-6 and SC70-6 packages.
Applications
•
•
•
•
Sensors
Active Filters
Cellular and Cordless Phones
Laptops and PDAs
•
•
•
•
Audio
Handheld Test Equipment
Battery-Powered Instrumentation
A/D Converters
Pin Configuration
Figure 1. Pin Assignment Diagram
A0
℃
℃
GS872X. They are specified over the extended industrial temperature range (-40
μ
The GS872X have a high gain-bandwidth product of 11MHz, a slew rate of 9V/
s, and a quiescent current of 1.1mA per
to +125
). The operating range is from
1/17
GS8721/22/24/21N
Absolute Maximum Ratings
Condition
Power Supply Voltage (V
DD
to Vss)
Analog Input Voltage (IN+ or IN-)
PDB Input Voltage
Operating Temperature Range
Junction Temperature
Storage Temperature Range
Lead Temperature (soldering, 10sec)
-55°C
+260°C
)
125°C/W
216°C/W
190°C/W
190°C/W
333°C/W
Min
-0.5V
Vss-0.5V
Vss-0.5V
-40°C
+160°C
+150°C
Max
+7.5V
V
DD
+0.5V
+7V
+125°C
SOP-8, θ
JA
MSOP-8, θ
JA
SOT23-5, θ
JA
SOT23-6, θ
JA
SC70-5, θ
JA
ESD Susceptibility
HBM
MM
Note:
Stress greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or any other conditions outside those indicated in the operational
sections of this specification are not implied. Exposure to absolute maximum rating conditions for extended periods may affect
reliability.
Package/Ordering Information
MODEL
CHANNEL
ORDER NUMBER
GS8721-CR
GS8721
Single
GS8721-TR
GS8721Y-SR
GS8722
Dual
GS8722-SR
GS8722-MR
GS8724-TR
GS8724-SR
GS8721N-TR
GS8721N-CR
PACKAGE
DESCRIPTION
SC70-5
SOT23-5
SOP-8
SOP-8
MSOP-8
TSSOP-14
SOP-14
SOT23-6
SC70-6
PACKAGE
OPTION
Tape and Reel,3000
Tape and Reel,3000
Tape and Reel,2500
Tape and Reel,2500
Tape and Reel,3000
Tape and Reel,3000
Tape and Reel,2500
Tape and Reel,3000
Tape and Reel,3000
MARKING
INFORMATION
8721
8721
GS8721Y
GS8722
GS8722
GS8724
GS8724
8721N
8721N
GS8724
Quad
Single With
shutdown
GS8721N
A0
℃
Package Thermal Resistance (TA=+25
8KV
400V
2/17
GS8721/22/24/21N
Electrical Characteristics
PARAMETER
INPUT CHARACTERISTICS
Input Offset Voltage (V
OS
)
Input Bias Current (I
B
)
Input Offset Current (I
OS
)
Input Common Mode Voltage Range (V
CM
)
V
S
= 5.5V
0.8
1
1
-0.1 to
+5.6
Common Mode Rejection Ratio (CMRR)
V
S
= 5.5V, V
CM
= -0.1V to 4V
V
S
= 5.5V, V
CM
= -0.1V to 5.6V
Open-Loop Voltage Gain (A
OL
)
R
L
= 600Ω,V
O
= 0.15V to 4.85V
R
L
= 10kΩ,V
O
= 0.05V to 4.95V
Input Offset Voltage Drift (∆V
OS
/∆
T
)
OUTPUT CHARACTERISTICS
Output Voltage Swing from Rail
R
L
= 600Ω
R
L
= 10kΩ
Output Current (I
OUT
)
Closed-Loop Output Impedance
POWER-DOWN DISABLE
Turn-On Time
Turn-Off Time
DISABLE Voltage-Off
DISABLE Voltage-On
POWER SUPPLY
Operating Voltage Range
2.1
5.5
Power Supply Rejection Ratio (PSRR)
V
S
= +2.5V to +5.5V
V
CM
= (-V
S
) + 0.5V
Quiescent Current/Amplifier (I
Q
)
Supply Current when Disabled
(GS8721N Only)
I
OUT
= 0
91
1.1
90
74
1.5
1.1
0.3
0.8
2
f = 100kHz, G = 1
0.1
0.015
70
7.5
55
82
75
90
108
2.4
80
65
3.5
V
V
45
42
38
mA
Ω
µs
µs
V
V
2.1
5.5
2.1
5.5
2.1
5.5
V
V
72
1.65
72
1.7
68
1.85
dB
mA
nA
A0
℃
℃
℃
+25
+25
70
to 85
125
3.9
4.3
4.6
64
64
63
76
75
68
℃
℃
℃
℃
℃
℃
Ω
℃
(At Vs=5V, T
A
= +25
, V
CM
= V
S
/2, R
L
= 600
, unless otherwise noted.)
GS8721/2/4/1N
TYP
CONDITIONS
0
to
-40
-40
to
UNITS
MAX
MIN /
MIN/MAX OVER TEMPERATURE
mV
pA
pA
V
MAX
TYP
TYP
TYP
dB
dB
dB
dB
µV/
MIN
MIN
MIN
MIN
TYP
TYP
TYP
MIN
TYP
TYP
TYP
MAX
MIN
MIN
MAX
MIN
MAX
MAX
3/17
GS8721/22/24/21N
Electrical Characteristics
PARAMETER
CONDITIONS
DYNAMIC PERFORMANCE
Gain-Bandwidth Product (GBP)
Phase Margin (φ
O
)
Full Power Bandwidth (BWP)
Slew Rate (SR)
Settling Time to 0.1% (t
S
)
Overload Recovery Time
NOISE PERFORMANCE
Voltage Noise Density (e
n
)
f = 1kHz
f = 10kHz
11.5
8
R
L
= 10kΩ, C
L
= 100pF
R
L
= 10kΩ, C
L
= 100pF
1% distortion, R
L
= 600Ω
11
51
400
9
0.3
1.5
G = +1, 2V Step, R
L
= 10kΩ
G = +1, 2V Step, R
L
= 600Ω
V
IN
·Gain = VS, R
L
= 600Ω
A0
℃
℃
+25
+25
70
85
125
℃
℃
℃
℃
℃
℃
Ω
＜
℃
(At Vs=5V, T
A
= +25
, V
CM
= V
S
/2, R
L
= 600
, unless otherwise noted.)
GS8721/2/4/1N
TYP
0
MIN/MAX OVER TEMPERATURE
to
-40
to
-40 to
UNITS
MAX
MIN /
MHz
Degrees
kHz
V/µs
µs
µs
TYP
TYP
TYP
TYP
TYP
TYP
nV
/
Hz
nV
/
Hz
TYP
TYP
4/17
GS8721/22/24/21N
Typical Performance characteristics
Large-Signal Step Response
Voltage (1V/div)
Vs=5V
G=+1
C
L
=100pF
R
L
=10KΩ
Voltage (500mV/div)
Small-Signal Step Response
Small-Signal Step Response
Voltage (50mV/div)
Vs=5V
G=+1
C
L
=100pF
R
L
=10 KΩ
Voltage (50mV/div)
Vs=2.5V
G=+1
C
L
=100pF
R
L
=10 KΩ
Positive Overload Recovery
Negative Overload Recovery
50mV
V
IN
R
L
= 600Ω
G=-100
Vs= 2.5V
V
IN
=50mV
p-p
/div
V
IN
Vs= 2.5V
V
IN
=50mV
p-p
1V
V
OUT
/div
V
OUT
R
L
=600Ω
G=-100
0.5V
/div
A0
0
µ
Time (2 s/div)
Time (2 s/div)
µ
Time (1 s/div)
Time (1 s/div)
µ
±
±
µ
µ
µ
℃
(At Vs=5V, T
A
= +25
, V
CM
= V
S
/2, R
L
= 600Ω, unless otherwise noted.)
Large-Signal Step Response
Vs=2.5V
G=+1
C
L
=100pF
R
L
=10 KΩ
Time (1 s/div)
Time (1 s/div)
50mV
/div
5/17
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