3PEAK
TP2431/TP2432 /TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
Description
Features
Low Noise: 13nV/√Hz(f= 1kHz)
Supply Current: 190μA/ch
Offset Voltage: 1 mV (max)
Low THD+N: 0.0005%
Supply Range: 2.2V to 5.5V
Low Input Bias Current: 0.3pA Typical
EMIRR IN+: 85 dB( under 2.4GHz)
Slew Rate: 0.9 V/μs
Gain-bandwidth Product: 1.6MHz
Rail-to-Rail I/O
High Output Current: 70mA (1.0V Drop)
–40°C to 125°C Operation Range
The single TP2431, dual TP2432, and quad TP2434
operational amplifiers combine excellent DC accuracy
with Rail-to-Rail operation at the input and output. Since
the common-mode voltage extends from VCC to VEE,
the devices can operate from either a single supply
(2.2V to 5.5V) or split supplies (±1.1V to ±2.75V). Each
op amp requires less than 190μA of supply current.
Even with this low current, the op amps are capable of
driving a 1kΩ load, and the input-referred voltage noise
is only 13nV/√Hz. In addition, these op amps can drive
loads in excess of 2000pF.
The precision performance of the TP2431/TP2432/
TP2434 combined with their wide input and output
dynamic range, low-voltage, single-supply operation,
and very low supply current, make them an ideal choice
for battery-operated equipment, industrial, and data
acquisition and control applications.
Applications
The TP2431 is single channel version available in 8-pin
SOP and 5-pin SOT23 packages. The TP2432 is dual
channel version available in 8-pin SOP and MSOP
packages. The TP2434 is quad channel version
available in 14-pin SOP and TSSOP packages.
Portable Equipment
Battery-Powered Instruments
Data Acquisition and Control
Low-Voltage Signal Conditioning
Communications
Security
3PEAK and the 3PEAK logo are registered trademarks of
3PEAK INCORPORATED. All other trademarks are the property of
their respective owners.
Pin Configuration (Top View)
TP2432
8-Pin SOP/MSOP
(-S Suffix)
(-S and -V Suffixes)
NC
1
8
NC
Out A
1
﹣In
2
7
﹢Vs
﹣In A
2
﹢In
3
6
Out
﹢In A
3
﹣Vs
4
5
NC
﹣Vs
4
TP2431
5-Pin SOT23
1
﹣Vs
2
+In
3
B
﹢Vs
Out
A
﹣In A
1
2
A
4
-In
TP2431U
5-Pin SOT23
2
-In
3
﹣In B
5
﹢In B
5
14
Out D
13
﹣In D
D
12
﹢In D
﹢Vs
4
11
﹣Vs
﹢In B
5
10
﹢In C
﹣In B
6
9
﹣In C
Out B
7
8
Out C
+ Vs
Quiescent Current vs. Supply Voltage
0.25
0.2
3
0.15
0.1
0.05
C
0
1.5
2.5
3.5
4.5
Supply Voltage (V)
A
- Vs
Out B
6
﹢In A
B
-T Suffixes
1
﹢Vs
7
(-S and -T Suffixes)
5
+In
8
TP2434
14-Pin SOP/TSSOP
(-T Suffix)
Out
A
Supply current (mA)
TP2431
8-Pin SOP
4
OUT
Order Information
www.3peakic.com.cn
Rev. C.3
1
TP2431 / TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
Model Name
TP2431
TP2432
TP2434
Order Number
Package
Marking
Information
Transport Media, Quantity
TP2431-TR
5-Pin SOT23
Tape and Reel, 3,000
431
TP2431U-TR
5-Pin SOT23
Tape and Reel, 3,000
43U
TP2432-SR
8-Pin SOP
Tape and Reel, 4,000
TP2432
TP2432-VR
8-Pin MSOP
Tape and Reel, 3,000
TP2432
TP2434-SR
14-Pin SOP
Tape and Reel, 2,500
TP2434
TP2434-TR
14-Pin TSSOP
Tape and Reel, 3,000
TP2434
Absolute Maximum Ratings Note 1
Supply Voltage: V+ – V– Note 2............................7.0V
Input Voltage............................. V– – 0.3 to V+ + 0.3
Current at Supply Pins……………............... ±60mA
Operating Temperature Range........–40°C to 125°C
Input Current: +IN, –IN Note 3.......................... ±20mA
Maximum Junction Temperature................... 150°C
Output Current: OUT.................................... ±160mA
Output Short-Circuit Duration Note 4…......... Indefinite
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 op amp supplies must be established simultaneously, with, or before, the application of any input signals.
Note 3: 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.
Note 4: 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
Parameter
Condition
HBM
Human Body Model ESD
ANSI/ESDA/JEDEC JS-001
4
kV
CDM
Charged Device Model ESD
ANSI/ESDA/JEDEC JS-002
1
kV
Thermal Resistance
2
Package Type
θJA
θJC
Unit
5-Pin SOT23
250
81
°C/W
8-Pin SOP
158
43
°C/W
8-Pin MSOP
210
45
°C/W
14-Pin SOP
120
36
°C/W
14-Pin TSSOP
180
35
°C/W
Rev. C.3
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Minimum Level
Unit
TP2431/TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
Electrical Characteristics
The specifications are at TA = 27°C. VS = +2.7 V to +5.5 V, or ±1.35 V to ±2.75 V, RL = 2kΩ, CL =100pF.Unless otherwise noted.
SYMBOL
VOS
VOS TC
IB
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
-1
+1
2
mV
Input Offset Voltage
VCM = VDD/2
Input Offset Voltage Drift
-40°C to 125°C
±0.3
1
TA = 27 °C
0.3
pA
TA = 85 °C
150
pA
TA = 125 °C
300
pA
0.001
pA
Input Bias Current
μV/°C
IOS
Input Offset Current
Vn
Input Voltage Noise
f = 0.1Hz to 10Hz
4.1
μVPP
en
in
Input Voltage Noise Density
Input Current Noise
13
nV/√Hz
fA/√Hz
CIN
Input Capacitance
f = 1kHz
f = 1kHz
Differential
Common Mode
VCM = 2V to 3V
CMRR
PSRR
Common Mode Rejection Ratio
Common-mode Input Voltage
Range
Power Supply Rejection Ratio
AVOL
VCM
85
2
7.76
6.87
110
V– -0.1
pF
dB
V++0.1
V
VCM = 2.5V, VS = 4.8V to 5V
75
100
dB
Open-Loop Large Signal Gain
RLOAD = 2kΩ
100
130
dB
VOL, VOH
Output Swing from Supply Rail
RLOAD = 2kΩ
ROUT
Closed-Loop Output Impedance
G = 1, f =1kHz, IOUT = 0
RO
Open-Loop Output Impedance
f = 1kHz, IOUT = 0
ISC
Output Short-Circuit Current
Sink or source current
VDD
Supply Voltage
15
95
45
mV
0.002
Ω
125
Ω
130
mA
2.2
V
280
μA
IQ
Quiescent Current per Amplifier
PM
Phase Margin
RLOAD = 1kΩ, CLOAD = 60pF
80
°
GM
Gain Margin
RLOAD = 1kΩ, CLOAD = 60pF
15
dB
Gain-Bandwidth Product
f = 1kHz
AV = 1, VOUT = 1.5V to 3.5V, CLOAD =
60pF, RLOAD = 1kΩ
1.6
MHz
0.84
V/μs
58.6
4.4
4.4
kHz
0.0003
%
110
dB
GBWP
SR
FPBW
tS
THD+N
Xtalk
Slew Rate
Full Power Bandwidth Note 1
Settling Time, 0.1%
Settling Time, 0.01%
Total Harmonic Distortion and
Noise
Channel Separation
190
5.5
AV = –1, 1V Step
f = 1kHz, AV =1, RL = 2kΩ, VOUT = 1Vp-p
f = 1kHz, RL = 2kΩ
0.36
μs
Note 1: Full power bandwidth is calculated from the slew rate FPBW = SR/π • V P-P
www.3peakic.com.cn
Rev. C.3
3
TP2431 / TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
Typical Performance Characteristics
VS = ±2.75V, VCM = 0V, RL = Open, unless otherwise specified.
Offset Voltage Production Distribution
Unity Gain Bandwidth vs. Temperature
2.5
5000
4500
2
4000
GBW(MHz)
Population
3500
3000
2500
2000
1.5
1
1500
0.5
1000
500
0
0
-50
0
50
100
150
Temperature(℃)
Offset Voltage(uV)
Input Voltage Noise Spectral Density
130
200
110
150
90
100
70
50
50
0
30
-50
10
-100
-10
-150
-30
-200
-50
1000
Noise(nV/√Hz)
VCC= +5V
RL= 1kΩ
Phase (°)
Gain(dB)
Open-Loop Gain and Phase
100
10
-250
0.1
10
1k
100k
1
10M
1
10
Frequency (Hz)
100
1k
10k
100k
1M
Frequency(Hz)
Input Bias Current vs. Temperature
Input Bias Current vs. Input Common Mode Voltage
5.00E-16
1.00E-11
Input Bias Current(A)
Input Bias Current(A)
1.00E-13
1.00E-15
5.00E-17
1.00E-17
1.00E-19
5.00E-18
1.00E-21
-10
10
30
50
70
90
110
Temperature(℃)
4
Rev. C.3
www.3peakic.com.cn
130
150
0
1
2
3
4
Common Mode Voltage(V)
5
6
TP2431/TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
Typical Performance Characteristics
VS = ±2.75V, VCM = 0V, RL = Open, unless otherwise specified. (Continued)
Common Mode Rejection Ratio
CMRR vs. Frequency
140
120
120
100
100
CMRR(dB)
CMRR(dB)
140
80
60
80
60
40
40
20
20
0
0
0
1
2
3
1
4
10
100
1k
10k
100k
1M
10M
Frequency(Hz)
Common Mode Voltage(V)
Quiescent Current vs. Temperature
Short Circuit Current vs. Temperature
180
0.205
160
ISINK
140
120
Ishort(mA)
Supply current(mA)
0.2
0.195
0.19
ISOURCE
100
80
60
40
0.185
20
0
0.18
-50
-25
0
25
50
75
100
125
-50
150
0
50
Power-Supply Rejection Ratio
150
Quiescent Current vs. Supply Voltage
0.25
120
100
Supply current (mA)
0.2
80
PSRR(dB)
100
Temperature(℃)
Temperature(℃)
PSRR+
60
PSRR-
40
0.15
0.1
0.05
20
0
1
10
100
1k
10k
Frequency(Hz)
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100k
1M
10M
0
1.5
2.5
3.5
4.5
Supply Voltage (V)
Rev. C.3
5
TP2431 / TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
Typical Performance Characteristics
VS = ±2.75V, VCM = 0V, RL = Open, unless otherwise specified. (Continued)
Power-Supply Rejection Ratio vs. Temperature
CMRR vs. Temperature
140
120
120
100
CMRR(-dB)
PSRR(-dB)
100
80
60
80
60
40
40
20
20
0
0
-50
0
50
100
-50
150
0
50
100
Temperature(℃)
Temperature(℃)
EMIRR IN+ vs. Frequency
Large-Scale Step Response
140
Output Voltage (2V/div)
EMIRR IN+ (dB)
120
100
80
60
40
20
Gain= +1
RL= 10kΩ
0
10
100
1000
10000
Frequency (MHz)
Time (10ms/div)
Time (5μs/div)
6
2V/div
Positive Over-Voltage Recovery
Gain= +10
±V= ±2.5V
1V/div
Gain= +10
±V= ±2.5V
1V/div
2V/div
Negative Over-Voltage Recovery
Rev. C.3
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Time (5μs/div)
150
TP2431/TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
Typical Performance Characteristics
VS = ±2.75V, VCM = 0V, RL = Open, unless otherwise specified. (Continued)
0.1 Hz TO 10 Hz Input Voltage Noise
Offset Voltage vs Common-Mode Voltage
200
Vcc=±2.5V
-200
Offset voltage(μV)
Output Voltage (2μV/div)
0
-400
-600
-800
-1000
-1200
-2.5
Time (1s/div)
-0.5
0.5
1.5
2.5
Common-mode voltage(V)
Positive Output Swing vs. Load Current
Negative Output Swing vs. Load Current
0
140
-20
-40℃
120
25℃
100
-40
+125℃
-60
Iout(mA)
Iout(mA)
-1.5
80
60
-80
-100
+125℃
-120
-140
40
25℃
-160
20
-180
0
-40℃
-200
0
1
2
3
Vout Dropout (V)
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4
5
0
1
2
3
4
5
Vout Dropout (V)
Rev. C.3
7
TP2431 / TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
Pin Functions
-IN: Inverting Input of the Amplifier.
possible should be used between power supply pins or
+IN: Non-Inverting Input of Amplifier.
between supply pins and ground.
OUT: Amplifier Output. The voltage range extends to
V- or -Vs: Negative Power Supply. It is normally tied to
within mV of each supply rail.
ground. It can also be tied to a voltage other than
V+ or +Vs: Positive Power Supply. Typically the voltage
ground as long as the voltage between V+ and V– is from
is from 2.2V to 5.5V. Split supplies are possible as long
2.2V to 5.5V. If it is not connected to ground, bypass it
as the voltage between V+ and V– is between 2.2V and
with a capacitor of 0.1μF as close to the part as
possible.
5.5V. A bypass capacitor of 0.1μF as close to the part as
Operation
The TP2431/TP2432/TP2434 can operate from a single +2.2V to +5.5V power supply, or from ±1.1V to ±2.75V power
supplies. The power supply pin(s) must be bypassed to ground with a 0.1μF capacitor as close to the pin as possible. The
single TP2431, dual TP2432 and quad TP2434 op amps combine excellent DC accuracy with rail-to-rail operation at both
input and output. With their precision performance, wide dynamic range at low supply voltages, and very low supply current,
these op amps are ideal for battery-operated equipment, industrial, and data acquisition and control applications.
Applications Information
Rail-to-Rail Inputs and Outputs
The TP243x op amps are designed to be immune to phase reversal when the input pins exceed the supply voltages,
therefore providing further in-system stability and predictability. Figure 1 shows the input voltage exceeding the supply
voltage without any phase reversal.
Figure 1. No Phase Reversal
Input ESD Diode Protection
The TP2431 incorporates internal electrostatic discharge (ESD) protection circuits on all pins. In the case of input and
output pins, this protection primarily consists of current-steering diodes connected between the input and power-supply
pins. These ESD protection diodes also provide in-circuit input overdrive protection, as long as the current is limited to
10 mA as stated in the Absolute Maximum Ratings table. Many input signals are inherently current-limited to less than
10 mA; therefore, a limiting resistor is not required. Figure 2 shows how a series input resistor (RS) may be added to
the driven input to limit the input current. The added resistor contributes thermal noise at the amplifier input and the
8
Rev. C.3
www.3peakic.com.cn
TP2431/TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
value should be kept to the minimum in noise-sensitive applications.
Current-limiting resistor
required if input voltage
exceeds supply rails by
>0.5V.
V+
500Ω
IN+
+2.5V
Ioverload
10mA max
TP2431
500Ω
VIN
IN-
Vout
5kΩ
-2.5V
VINPUT ESD DIODE CURRENT LIMITING- UNITY GAIN
Figure 2. Input ESD Diode
EMI Susceptibility and Input Filtering
Operational amplifiers vary in susceptibility to electromagnetic interference (EMI). If conducted EMI enters the device,
the dc offset observed at the amplifier output may shift from the nominal value while EMI is present. This shift is a result
of signal rectification associated with the internal semiconductor junctions. While all operational amplifier pin functions
can be affected by EMI, the input pins are likely to be the most susceptible. The TP2431 operational amplifier family
incorporates an internal input low-pass filter that reduces the amplifier response to EMI. Both common-mode and
differential mode filtering are provided by the input filter. The filter is designed for a cutoff frequency of approximately
400 MHz (–3 dB), with a roll-off of 20 dB per decade.
140
EMIRR IN+ (dB)
120
100
80
60
40
20
0
10
100
1000
10000
Frequency (MHz)
Figure 3. TP2431 EMIRR IN+ vs Frequency
PCB Surface Leakage
In applications where low input bias current is critical, Printed Circuit Board (PCB) surface leakage effects need to be
considered. Surface leakage is caused by humidity, dust or other contamination on the board. Under low humidity
conditions, a typical resistance between nearby traces is 1012Ω. A 5V difference would cause 5pA of current to flow,
which is greater than the TP2431/2432/2434 OPA’s input bias current at +27°C (±0.3pA, typical). It is recommended to
use multi-layer PCB layout and route the OPA’s -IN and +IN signal under the PCB surface.
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Rev. C.3
9
TP2431 / TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
The effective way to reduce surface leakage is to use a guard ring around sensitive pins (or traces). The guard ring is
biased at the same voltage as the sensitive pin. An example of this type of layout is shown in Figure 6 for Inverting
Gain application.
1. For Non-Inverting Gain and Unity-Gain Buffer:
a) Connect the non-inverting pin (VIN+) to the input with a wire that does not touch the PCB surface.
b) Connect the guard ring to the inverting input pin (VIN–). This biases the guard ring to the Common Mode input voltage.
2. For Inverting Gain and Trans-impedance Gain Amplifiers (convert current to voltage, such as photo detectors):
a) Connect the guard ring to the non-inverting input pin (VIN+). This biases the guard ring to the same reference voltage as the
op-amp (e.g., VDD/2 or ground).
b) Connect the inverting pin (VIN–) to the input with a wire that does not touch the PCB surface.
Guard Ring
VIN+
VIN-
+VS
Figure 4 The Layout of Guard Ring
Power Supply Layout and Bypass
The TP2431/2432/2432 OPA’s power supply pin (VDD for single-supply) should have a local bypass capacitor (i.e.,
0.01μF to 0.1μF) within 2mm for good high frequency performance. It can also use a bulk capacitor (i.e., 1μF or larger)
within 100mm to provide large, slow currents. This bulk capacitor can be shared with other analog parts.
Ground layout improves performance by decreasing the amount of stray capacitance and noise at the OPA’s inputs
and outputs. To decrease stray capacitance, minimize PC board lengths and resistor leads, and place external
components as close to the op amps’ pins as possible.
Proper Board Layout
To ensure optimum performance at the PCB level, care must be taken in the design of the board layout. To avoid
leakage currents, the surface of the board should be kept clean and free of moisture. Coating the surface creates a
barrier to moisture accumulation and helps reduce parasitic resistance on the board.
Keeping supply traces short and properly bypassing the power supplies minimizes power supply disturbances due to
output current variation, such as when driving an ac signal into a heavy load. Bypass capacitors should be connected
as closely as possible to the device supply pins. Stray capacitances are a concern at the outputs and the inputs of the
amplifier. It is recommended that signal traces be kept at least 5mm from supply lines to minimize coupling.
A variation in temperature across the PCB can cause a mismatch in the Seebeck voltages at solder joints and other
points where dissimilar metals are in contact, resulting in thermal voltage errors. To minimize these thermocouple
effects, orient resistors so heat sources warm both ends equally. Input signal paths should contain matching numbers
and types of components, where possible to match the number and type of thermocouple junctions. For example,
dummy components such as zero value resistors can be used to match real resistors in the opposite input path.
Matching components should be located in close proximity and should be oriented in the same manner. Ensure leads
are of equal length so that thermal conduction is in equilibrium. Keep heat sources on the PCB as far away from
amplifier input circuitry as is practical.
The use of a ground plane is highly recommended. A ground plane reduces EMI noise and also helps to maintain a
constant temperature across the circuit board.
10
Rev. C.3
www.3peakic.com.cn
TP2431/TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
Package Outline Dimensions
SOT23-5
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Rev. C.3
11
TP2431 / TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
Package Outline Dimensions
SOP-8
A2
C
θ
L1
A1
e
E
D
Symbol
E1
b
12
Rev. C.3
www.3peakic.com.cn
Dimensions
Dimensions In
In Millimeters
Inches
Min
Max
Min
Max
A1
0.100
0.250
0.004
0.010
A2
1.350
1.550
0.053
0.061
b
0.330
0.510
0.013
0.020
C
0.190
0.250
0.007
0.010
D
4.780
5.000
0.188
0.197
E
3.800
4.000
0.150
0.157
E1
5.800
6.300
0.228
0.248
e
1.270 TYP
0.050 TYP
L1
0.400
1.270
0.016
0.050
θ
0°
8°
0°
8°
TP2431/TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
Package Outline Dimensions
MSOP-8
Dimensions
Dimensions In
In Millimeters
Inches
Min
Max
Min
Max
A
0.800
1.200
0.031
0.047
A1
0.000
0.200
0.000
0.008
A2
0.760
0.970
0.030
0.038
b
0.30 TYP
0.012 TYP
C
0.15 TYP
0.006 TYP
D
2.900
e
0.65 TYP
E
2.900
3.100
0.114
0.122
E1
4.700
5.100
0.185
0.201
L1
0.410
0.650
0.016
0.026
θ
0°
6°
0°
6°
Symbol
E
E1
A
A2
e
b
D
3.100
0.114
0.122
0.026
A1
R1
R
θ
L1
www.3peakic.com.cn
L
L2
Rev. C.3
13
TP2431 / TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
Package Outline Dimensions
TSSOP-14
Dimensions
In Millimeters
Symbol
MIN
TYP
MAX
A
-
-
1.20
A1
0.05
-
0.15
A2
0.80
0.90
1.05
b
0.19
-
0.30
C
0.09
-
0.20
D
4.86
4.96
5.10
E
4.30
4.40
4.50
E1
6.20
6.40
6.60
e
L
0.65 BSC
0.45
H
θ
14
Rev. C.3
www.3peakic.com.cn
0.60
0.75
0.25 BSC
0°
-
8°
TP2431/TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
Package Outline Dimensions
SOP-14
D
E1
Dimensions
E
In Millimeters
Symbol
e
b
A A2
A1
MIN
TYP
MAX
A
1.35
1.60
1.75
A1
0.10
0.15
0.25
A2
1.25
1.45
1.65
b
0.36
D
8.53
8.63
8.73
E
5.80
6.00
6.20
E1
3.80
3.90
4.00
e
L
www.3peakic.com.cn
1.27 BSC
0.45
0.60
L1
1.04 REF
L2
0.25 BSC
θ
L
L1
0.49
0°
0.80
8°
θ
L2
Rev. C.3
15
TP2431 / TP2432 / TP2434
1.6MHz Bandwidth, Micropower Low Noise Op-amps
Revision History
Date
Revision
Notes
2022/4/30
C.2
Update order information.
2023/7/18
C.3
The following updates are all about the new datasheet formats or typo, the
actual product remains unchanged.
Remove the maximum value of IB at TA = 27 °C due to test coverage.
16
Rev. C.3
www.3peakic.com.cn
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