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RS121S, RS122S
RS121, RS122, RS124
150kHz, Rail-to-Rail I/O
CMOS Operational Amplifier
FEATURES
•
•
•
•
•
•
•
GAIN BANDWIDTH:150kHz
RAIL-TO-RAIL INPUT AND OUTPUT
0.8mV Typical Vos
INPUT VOLTAGE RANGE: -0.1V to +5.6V
with Vs = 5.5V
SUPPLY RANGE: +2.5V to +5.5V
SHUTDOWN: RS121S/RS122S
SPECIFIED UP TO +125°
C
Micro
SIZE
DESCRIPTION
The RS121, RS122, RS124, RS121S, RS122S
families of products offer low voltage operation and
rail-to-rail input and output, as well as excellent
speed/power consumption ratio, providing an
excellent bandwidth (150kHz) and slew rate of
0.05V/us. The op-amps are unity gain stable and
feature an ultra-low input bias current.
The devices are ideal for sensor interfaces, active
filters and portable applications. The RS121S,
RS122S include a shutdown mode. Under logic
control, the amplifiers can be switched from normal
operation to a standby current that is less than
1uA.The RS121, RS122, RS124, RS121S, RS122S
families of operational amplifiers are specified at the
full temperature range of −40° to +125° under
C
C
single or dual power supplies of 2.5V to 5.5V.
PACKAGES: SOT23-5, SOT23-6
APPLICATIONS
•
•
•
•
SENSORS
PHOTODIODE AMPLIFICATION
ACTIVE FILTERS
TEST EQUIPMENT
DRIVING A/D CONVERTERS
•
PIN CONFIGURATIONS
RS121
OUT
V-
1
2
RS121S
5
V+
OUT
V-
1
6
5
V+
EN
RS122S
RS121
NC
-IN
1
2
3
4
8
NC
V+
OUT
NC
OUT A
-IN A
1
2
10
V+
2
3
7
-
+
+IN
3
4
-IN
+IN
4
-IN
+IN
V-
+
+
-
+
-
6
5
+IN A
V-
En A
3
4
5
A
B
9
OUT B
-IN B
+IN B
En B
SOT23-5
SOT23-6
SOIC-8(SOP8),MSOP-8
+
RS121B
+ IN
V-
- IN
RS121S
5
V+
NC
-IN
1
2
1
8
EN
V+
OUT
OUT A
-IN A
+IN A
1
2
3
2
3
7
6
4
SOT23-5
OUT
+IN
V-
+
-
3
4
+
A
B
+
5
SOIC-8(SOP8)
NC
V-
4
SOIC-8(SOP8),MSOP-8
-IN B
Note: NC indicates no internal connection
REV B.3
1
-
RS122
-
8
7
6
MSOP-10
RS124
8
7
6
5
V+
OUTB
OUT A
1
14
OUT D
-IN D
+IN D
V-
-
+
-IN A
+IN A
V+
2
3
4
A
- +
D
+ -
13
12
11
-IN B
+IN B
+IN B
5
6
7
- +
B
+ -
C
10
9
8
+IN C
-IN C
OUT C
OUT B
SOIC-14(SOP14),TSSOP-14
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RS121S, RS122S
RS121, RS122, RS124
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage, V+ to V-...............................................7.0V
Input Terminals, Voltage
(2)
…………... – 0.5 to (V+) + 0.5V
Current
(2)
…………………....…..... ±
10mA
Storage Temperature ……….…………… −65° to +150°
C
C
Operating Temperature ……….………… −40° to +125°
C
C
Junction Temperature................................................150°
C
Package Thermal Resistance @ T
A
= +25°
C
SOT23-5, SOT23-6………………….………………200°
C/W
MSOP-10, SOIC-8 …………………….…………... 150°
C/W
SOIC-14, TSSOP-14………….……….……………100°
C/W
Lead Temperature (Soldering, 10s) ……………........260°
C
ESD Susceptibility
HBM …......................................................................5000V
MM ……………………….........………………...……….400V
(1)
Stresses above these ratings may cause permanent damage. Exposure
to absolute maximum conditions for extended periods may degrade
device reliability. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those
specified is not implied.
(2)
Input terminals are diode-clamped to the power-supply rails. Input
signals that can swing more than 0.5V beyond the supply rails should
be current-limited to 10mA or less.
ESD SENSITIVITY CAUTION
ESD damage can range from subtle performance
degradation to complete device failure. Precision
integrated circuits may be more susceptible to
damage because very small parametric changes
could cause the device not to meet its published
specifications.
PACKAGE/ORDERING INFORMATION
2
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RS121S, RS122S
RS121, RS122, RS124
ELECTRICAL CHARACTERISTICS
(At T
A
= +25C, Vs=5V, R
L
= 500kΩ connected to V
S
/2, and V
OUT
= V
S
/2, unless otherwise noted.)
RS121S, RS122S,
RS121, RS122, RS124
PARAMETER
POWER SUPPLY
Vs
IQ
PSRR
Operating Voltage Range
Quiescent Current/Amplifier
Power-Supply Rejection Ratio
CONDITIONS
T
J
MIN
25C
25C
Vs=2.5V to 5.5V,
Vcm=(V-)+0.5V
25C
68
2.5
TYP
MAX
5.5
UNIT
V
uA
dB
7
95
INPUT
Vos
IB
Ios
Vcm
Input Offset Voltage
Input Bias Current
Input Offset Current
Common-Mode Voltage Range
Vs= 5.5V
Vs= 5.5V, Vcm
=-0.1V to 4V
CMRR
Common-Mode Rejection Ratio
Vs= 5.5V, Vcm
=-0.1V to 5.6V
25C
62
90
25C
25C
25C
25C
25C
-0.1
72
95
dB
0.8
1
1
5
10
10
5.6
mV
pA
pA
V
OUTPUT
R
L
=500KΩ, Vo=
0.015V to 4.985V
AOL
Open-Loop Voltage Gain
R
L
=100KΩ, Vo=
0.1V to 4.9V
Output Swing From Rail
Iout
SR
GBP
Output Short-Circuit Current
Slew Rate
Gain-Bandwidth Product
R
L
=2KΩ
25C
25C
25C
90
110
3
25
0.05
0.15
mV
mA
V/us
MHz
25C
92
110
dB
FREQUENCY RESPONSE
25C
25C
NOISE
e
n
Input Voltage Noise Density
f = 1KHz
f = 10KHz
25C
25C
25C
25C
25C
Shut Down
Amplifier Is Active
25C
25C
V-
(V-) +2
77
39
<1
3
20
(V-) +0.8
V+
nV/√Hz
nV/√Hz
ENABLE/SHUTDOWN(RS121S,RS122S)
I
Q(OFF)
t
OFF
t
ON
V
L
V
H
Supply Current in Shutdown
uA
us
us
V
V
3
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RS121S, RS122S
RS121, RS122, RS124
TYPICAL CHARACTERISTICS
At T
A
= +25C, Vs=5V, R
L
= 500kΩ connected to V
S
/2, V
OUT
= V
S
/2, unless otherwise noted.
OPEN−LOOP GAIN AND PHASE vs FREQUENCY
100
INPUT VOLTAGE NOISE
SPECTRAL DENSITY vs FREQUENCY
1000
Open-Loop Gain(dB)
60
40
20
90
70
50
Phase Margin (°)
Phase
|
0
-20
-40
10
1K
100K
30
10
-10
Voltage Noise (nV/√Hz)
80
Gain
130
110
100
10
10
100
1K
10K
100K
Frequency(Hz)
Frequency(Hz)
QUIESCENT CURRENT vs TEMPERATURE
13
QUIESCENT CURRENT vs TEMPERATURE
14
Quiescent Current(uA)
-40 -20 0
20 40 60 80 100 120 140
Temperature(℃) Vs=2.7V
39
37
35
33
31
29
27
25
23
21
19
17
15
13
12
11
10
9
8
Quiescent Current(uA)
12
11
10
9
8
7
-40 -20 0
20 40 60 80 100 120 140
Temperature(℃) Vs=5V
39
37
35
33
31
29
27
25
23
21
19
17
15
SINK CURRENT vs TEMPERATURE
SOURCE CURRENT vs TEMPERATURE
-40 -20
0 20 40 60 80 100 120 140
Temperature(℃)
Source Current(mA)
Sink Current(mA)
-40 -20
0
20 40 60 80 100 120 140
Temperature(℃)
4
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RS121S, RS122S
RS121, RS122, RS124
TYPICAL CHARACTERISTICS
At T
A
= +25C, Vs=5V, R
L
= 500kΩ connected to V
S
/2, V
OUT
= V
S
/2, unless otherwise noted.
INPUT BIAS CURRENT vs TEMPERATURE
10K
SMALL−SIGNAL STEP RESPONSE
C
L
=100PF
Input Bias Current(pA)
1K
100
10
1
0.1
-40 -20
0
20
40
60
80 100 120 140
50mV/div
5us/div
Temperature(℃)
LARGE−SIGNAL STEP RESPONSE
C
L
=100PF
1V/div
40us/div
5
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