TP2121/TP2121N/TP2122/TP2124
1.8V, 600nA Nanopower, Rail-to-Rail Input/Output Op-amps
Description
The TP212x are ultra-low power, precision CMOS
op-amps featuring a maximum supply current of
950nA per amplifier with an ultra-low typical input
bias current of 1fA. Analog trim and calibration
routine reduce input offset voltage to below 1.5mV,
and the precision temperature compensation
technique makes offset voltage temperature drift at
0.5μV/°C, which allowing use of the TP212x in
systems with high gain without creating excessively
large output offset errors.
The TP212x are unity gain stable with 1,000nF
capacitive load with a constant 18kHz GBWP,
10mV/μs slew rate, which make them appropriate
for low frequency applications, such as battery
current monitoring and sensor conditioning. The
TP212x can operate from a single-supply voltage of
+1.8V to +6.0V or a dual-supply voltage of ±0.9V to
±3.0V. Beyond the rails input and rail-to-rail output
characteristics allow the full power-supply voltage to
be used for signal range.
The combined features make the TP212x ideal
choices for battery-powered applications because
they minimize errors due to power supply voltage
variations over the lifetime of the battery and
maintain high CMRR even for a rail-to-rail input
op-amp. Mobile accessories, wireless remote
sensing, backup battery sensors, and
single-Li+ or
2-cell NiCd/Alkaline
battery powered systems can
benefit from the features of the TP212x op-amps.
For applications that require power-down, the
TP2121N has a low-power shutdown mode that
reduces supply current to 3nA, and forces the output
into a high-impedance state.
Features
Supply Current: 950nA Maximum /Amplifier
Stable 18kHz GBWP with 10mV/μs Slew Rate
Offset Voltage: 1.5mV Maximum
Ultra-low V
OS
TC: 0.5μV/°C
Ultra-low Input Bias Current: 1fA Typical
High 120dB Open-Loop Voltage Gain
Unity Gain Stable for 1,000nF Capacitive Load
Rail-to-Rail Input/Output Voltage Range
Outputs Source and Sink 20mA of Load Current
No Phase Reversal for Overdriven Inputs
Ultra-low Single-Supply Operation Down to +1.8V
Shutdown Current: 3nA Typical (TP2121N)
–40°C to 125°C Operation Range
Robust 8kV – HBM and 2kV – CDM ESD Rating
Green, Popular Type Package
Applications
Handsets and Mobile Accessories
Current Sensing
Wireless Remote Sensors, Active RFID Readers
Environment/Gas/Oxygen Sensors
Threshold Detectors/Discriminators
Low Power Filters
Battery or Solar Powered Devices
Sensor Network Powered by Energy Scavenging
3PEAK and the 3PEAK logo are registered trademarks of
3PEAK INCORPORATED. All other trademarks are the property
of their respective owners.
Ultra-low Supply Current Op-amps:
Supply Current
GBWP
Single
With Shut-down
Dual
Quad
V
OUT
½
I
CC
R
3
(
R
1
1)
R
2
0.3
μA
10 kHz
TP2111
TP2111N
TP2112
TP2114
0.6
μA
18 kHz
TP2121
TP2121N
TP2122
TP2124
4
μA
150 kHz
TP1511
TP1511N
TP1512
TP1514
TP2121 in Low Side Battery Current Sensor
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TP2121/TP2121N/TP2122/TP2124
Pin Configuration
(Top View)
1.8V, 600nA Nanopower, Rail-to-Rail Input/Output Op-amps
Order Information
Marking
Information
B2TYW
(1)
B2CYW
(1)
2121S
B2UYW
(1)
B2NYW
(1)
2121N
2121NS
B22S
B22V
B24S
B24T
Model Name
Order Number
TP2121-TR
Package
5-Pin SOT23
5-Pin SC70
8-Pin SOIC
5-Pin SOT23
6-Pin SOT23
8-Pin MSOP
8-Pin SOIC
8-Pin SOIC
8-Pin MSOP
14-Pin SOIC
14-Pin TSSOP
Transport Media, Quantity
Tape and Reel, 3,000
Tape and Reel, 3,000
Tape and Reel, 4,000
Tape and Reel, 3,000
Tape and Reel, 3,000
Tape and Reel, 3,000
Tape and Reel, 4,000
Tape and Reel, 4,000
Tape and Reel, 3,000
Tape and Reel, 2,500
Tape and Reel, 3,000
TP2121
TP2121U
TP2121N
TP2121-CR
TP2121-SR
TP2121U-TR
TP2121N-TR
TP2121N-VR
TP2121N-SR
TP2122-SR
TP2122-VR
TP2124-SR
TP2124-TR
TP2122
TP2124
Note (1): ‘YW’ is date coding scheme. 'Y' stands for calendar year, and 'W' stands for single workweek coding scheme.
Absolute Maximum Ratings
Note 1
Supply Voltage: V
+
– V
–
....................................6.0V
Input Voltage............................. V
–
– 0.3 to V
+
+ 0.3
Input Current: +IN, –IN, SHDN
Note 2
.............. ±10mA
SHDN Pin Voltage……………………………V
–
to V
+
Output Current: OUT.................................... ±20mA
Output Short-Circuit Duration
Note 3
…......... Indefinite
Operating Temperature Range.......–40°C to 125°C
Maximum Junction Temperature................... 150°C
Storage Temperature Range.......... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ......... 260°C
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum
Rating condition for extended periods may affect device reliability and lifetime.
Note 2:
The inputs are protected by ESD protection diodes to each power supply. If the input extends more than 500mV beyond the power supply, the input
current should be limited to less than 10mA.
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REV1.2
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TP2121/TP2121N/TP2122/TP2124
1.8V, 600nA Nanopower, Rail-to-Rail Input/Output Op-amps
Note 3:
A heat sink may be required to keep the junction temperature below the absolute maximum. This depends on the power supply voltage and how many
amplifiers are shorted. Thermal resistance varies with the amount of PC board metal connected to the package. The specified values are for short traces
connected to the leads.
ESD, Electrostatic Discharge Protection
Symbol
HBM
CDM
Parameter
Human Body Model ESD
Charged Device Model ESD
Condition
MIL-STD-883H Method 3015.8
JEDEC-EIA/JESD22-C101E
Minimum Level
8
2
Unit
kV
kV
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REV1.2
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TP2121/TP2121N/TP2122/TP2124
5V Electrical Characteristics
1.8V, 600nA Nanopower, Rail-to-Rail Input/Output Op-amps
The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 27°C.
V
SUPPLY
= 5V, V
CM
= V
OUT
= V
SUPPLY
/2, R
L
= 100kΩ, C
L
=60pF, V
SHDN
is unconnected.
SYMBOL
V
OS
V
OS
TC
I
B
I
OS
V
n
e
n
R
IN
C
IN
CMRR
V
CM
PSRR
A
VOL
V
OL
, V
OH
R
OUT
R
O
I
SC
V
DD
I
Q
PM
GM
GBWP
t
S
SR
FPBW
I
Q(off)
I
SHDN
I
LEAK
V
IL
V
IH
PARAMETER
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current
Input Offset Current
Input Voltage Noise
Input Voltage Noise Density
Input Resistance
Input Capacitance
Common Mode Rejection Ratio
Common-mode Input Voltage
Range
Power Supply Rejection Ratio
Open-Loop Large Signal Gain
Output Swing from Supply Rail
Closed-Loop Output Impedance
Open-Loop Output Impedance
Output Short-Circuit Current
Supply Voltage
Quiescent Current per Amplifier
Phase Margin
Gain Margin
Gain-Bandwidth Product
Settling Time, 1.5V to 3.5V, Unity
Gain
Settling Time, 2.45V to 2.55V,
Unity Gain
Slew Rate
Full Power Bandwidth
Note 2
Supply Current in Shutdown
Note 1
Shutdown Pin Current
Note 1
Output Leakage Current in
Shutdown
Note 1
SHDN Input Low Voltage
Note 1
SHDN Input High Voltage
Note 1
CONDITIONS
V
CM
= V
DD
/2 and V
CM
= GND
T
A
=27
o
C
T
A
=85
o
C
T
A
=125
o
C
f = 0.1Hz to 10Hz
f = 1kHz
Differential
Common Mode
V
CM
= 0.1V to 4.9V
●
MIN
-1.5
TYP
±0.1
0.5
1
700
45
1
6.5
170
>1
2.9
5
130
MAX
+1.5
UNITS
mV
μV/°C
fA
fA
pA
fA
μV
P-P
nV/√Hz
TΩ
pF
dB
V
+
+0.3
92
120
120
5
0.4
2.6
20
600
61
-10
18
0.25
0.253
0.035
0.038
10
600
3
-10
-10
-3.6
3.6
●
●
0.5
1.0
6.0
950
V
dB
dB
dB
mV
Ω
Ω
mA
V
nA
°
dB
kHz
ms
mV/μs
Hz
nA
pA
pA
V
V
●
●
80
V
–
–0.3
60
80
80
V
OUT
= 2.5V, R
LOAD
= 100kΩ
V
OUT
= 0.1V to 4.9V, R
LOAD
= 100kΩ
R
LOAD
= 100kΩ
G = 1, f = 1kHz, I
OUT
= 0
f = 1kHz, I
OUT
= 0
Sink or source current
●
●
●
1.8
●
R
LOAD
= 100kΩ, C
LOAD
= 60pF
R
LOAD
= 100kΩ, C
LOAD
= 60pF
f = 1kHz
0.1%
0.01%
0.1%
0.01%
A
V
= 1, V
OUT
= 1.5V to 3.5V, C
LOAD
=
60pF, R
LOAD
= 100kΩ
2V
P-P
V
SHDN
= 0.5V
V
SHDN
= 1.5V
V
SHDN
= 0V, V
OUT
= 0V
V
SHDN
= 0V, V
OUT
= 5V
Disable
Enable
Note 1:
Specifications apply to the TP2121N with shutdown.
Note 2:
Full power bandwidth is calculated from the slew rate FPBW = SR/π • V
P-P.
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TP2121/TP2121N/TP2122/TP2124
1.8V, 600nA Nanopower, Rail-to-Rail Input/Output Op-amps
Typical Performance Characteristics
Small-Signal Step Response, 100mV Step
2.60
2.55
50mV/div
4
Large-Signal Step Response, 2V Step
2.50
2.45
2.40
3
Gain = +1
V
IN
Step = 100mV
C
LOAD
= 60pF
3
Gain = +1
C
LOAD
= 60pF
R
LOAD
= 100kΩ
2
5
7
2ms/div
9
1V/div
1
2
5
8
3ms/div
11
Open-Loop Gain and Phase
150
Phase Margin vs. C
LOAD
(Stable for Any C
LOAD
)
80
GAIN AND PHASE (dB)
100
Phase
50
Gain
Gain = 1
R
LOAD
= 100k
Ω
C
LOAD
= 60pF
1E-1
1E+1
1E+3
1E+5
1E+7
60
0
-50
1E-3
Phase (dB)
Gain = +1
R
LOAD
= 100k
Ω
40
20
0
1E+0
1E+1
FREQUENCY (Hz)
1E+2
1E+3
1E+4
Load Capacitance (pF)
1E+5
1E+6
Input Voltage Noise Spectral Density
10k
150
Common-Mode Rejection Ratio
Input Noise Voltage (nV/√Hz)
120
1k
CMRR (dB)
90
60
100
1E-1
1E+0
1E+1
1E+2
1E+3
30
1E-3
1E-1
1E+1
Frequency (Hz)
1E+3
1E+5
1E+7
FREQUENCY (Hz)
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