3PEAK
1
TP5531 / TP5532 / TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
www.3peakic.com.cn REV B
Features
LOW OFFSET VOLTAGE: 10 μV (Max)
ZERO DRIFT: 0.008 µV/°C
0.1Hz to 10Hz Noise: 1.1 µVPP
Low Supply Current: 42µA per Amplifier
Bandwidth: 350 kHz
Slew Rate: 0.16 V/μs
High Gain, 130 dB High CMRR and PSRR
Rail-to-rail Input and Output Swing
–40°C to 125°C Operation Range
Small Packages: SC70 and SOT23 (TP5531)
Applications
Transducer Amplifier
Bidirectional Current Sense
DC Offset Correction
Temperature Measurement
Remote Located Sensors
Battery-Powered Instruments
Electronic Weigh Scales
Pin Configuration
(Top View)
Description
The 3PEAK TP5531/2/4 low-power chopper stabilized
operational amplifiers provide input offset voltage
correction for very low offset and offset drift over time and
temperature. The devices operate with a single supply
voltage as low as 1.8V, while drawing 42μA per amplifier
of quiescent current with a gain bandwidth product of
350kHz. They are unity gain stable, have no 1/f noise,
have good Power Supply Rejection Ratio (PSRR) and
Common Mode Rejection Ratio (CMRR), and feature rail-
to-rail input and output swing.
The devices were designed using an advanced CMOS
process. The TP5531 (single version) is available in
SC70-5, SOT23-5 and SO-8 packages. The TP5532
(dual version) is offered in MSOP-8 and SO-8 package.
The TP5534 (quad version) is available in TSSOP-14 and
SOIC-14 package. All versions are specified for operation
from -40°C to 125°C .
3PEAK and the 3PEAK logo are registered trademarks of
3PEAK INCORPORATED. All other trademarks are the property of their
respective owners.
Related Zero-Drift Op-amps
VOS (Max.)
10 μV
5 μV
GBWP
350 kHz
3.5 MHz
Supply Current
42 μA
500 μA
eN at 1 kHz
55 nV/√Hz
15 nV/√Hz
Single
TP5531
TP5551
Dual
TP5532
TP5552
Quad
TP5534
TP5554
TP5531U
SOT23-5/SC70-5
(-T and -C Suffixes)
5
4
3
2
1
+IN
-IN
V-
V+
OUT
TP5531
SOT23-5/SC70-5
(-T and -C Suffixes)
5
4
3
2
1
OUT
+IN
V-
V+
-IN
2
REV B www.3peakic.com.cn
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
Pin Configuration
(Top View, continued)
8
6
5
7
3
2
1
4
NC
﹣Vs
﹢In
﹣In ﹢Vs
Out
NC
NC
TP5531
8-Pin SOIC
(-S Suffix)
TP5534
14-Pin SOIC/TSSOP
(-S and -T Suffixes)
14
13
12
11
10
9
8
6
5
7
3
2
1
4
Out A
﹢In A
﹣In A
DA
CB
Out D
﹢In D
﹣In D
Out B
﹢In B
﹣In B
Out C
﹢In C
﹣In C
﹣Vs
﹢Vs
TP5532
8-Pin SOIC/MSOP
(-S and -V Suffixes)
8
6
5
7
3
2
1
4
Out A
﹢In A
﹣In A
﹢In B
﹣In B
Out B
A
B
﹣Vs
﹢Vs
8
7
6
54
3
2
1
Out A
﹢In A
﹣In A
﹣Vs ﹢In B
﹣In B
Out B
﹢Vs
TP5532
8-Pin DFN
(-F Suffixes)
Order Information
Model Name
Order Number
Package
Transport Media, Quantity
Marking
Information
TP5531
TP5531-TR
SOT23-5
Tape and Reel, 3,000
E31T
TP5531-CR
SC70-5 (SOT353)
Tape and Reel, 3,000
31C
TP5531-SR
SOIC-8
Tape and Reel, 4,000
TP5531
TP5531U
TP5531U-TR
SOT23-5
Tape and Reel, 3,000
E31U
TP5531U-CR
SC70-5
Tape and Reel, 3,000
31V
TP5532
TP5532-SR
SOIC-8
Tape and Reel, 4,000
TP5532
TP5532-FR
DFN-8 2*2
Tape and Reel, 3,000
532
TP5532-VR
MSOP-8
Tape and Reel, 3,000
TP5532
TP5534
TP5534-SR
SOIC-14
Tape and Reel, 2,500
TP5534
TP5534-TR
TSSOP-14
Tape and Reel, 3,000
TP5534
Absolute Maximum Ratings
Note 1
Supply Voltage: .....................................................6V
Input Voltage: ....................... ……V– – 0.2 to V+ + 0.2
Input Current: +IN, –IN Note 2........................... ±20mA
Output Short-Circuit Duration Note 3…....... Indefinite
Current at Supply Pins……………............... ±50mA
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.
3
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
www.3peakic.com.cn REV B
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.
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
Parameter
Condition
Minimum Level
Unit
HBM
Human Body Model ESD
ANSI/ESDA/JEDEC JS-001
7
kV
CDM
Charged Device Model ESD
ANSI/ESDA/JEDEC JS-002
2
kV
Electrical Characteristics
At TA = 27° C, VS = 5V, RL = 10kΩ, VCM = VDD/2, unless otherwise noted.
SYMBO
L
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VS
Supply Voltage Range
1.8
5.5
V
IQ
Quiescent current per amplifier
TP5531
45
65
μA
TP5532/TP5534
42
60
μA
VOS
Input Offset Voltage
VCM = 2.5V
-10
1
10
μV
VCM = 0.05 to 4.95V
-20
20
μV
VS = 1.8V, VCM = 0.9V
-20
20
μV
dVOS/dT
vs temperature
0.008
0.05
μV/°C
PSRR
vs power supply
Vs = 3V to 5V
100
120
dB
Vn
input voltage noise, f=0.01Hz to 1Hz
0.4
μVpp
input voltage noise, f=0.1Hz to 10Hz
1.1
μVpp
en
Input voltage noise density, f=1kHz
55
nV/√Hz
CIN
Input capacitor, Differential
3
pF
Input capacitor, Common-Mode
2
pF
IB
Input Bias Current
±50
pA
Over temperature
±800
pA
IOS
Input offset current
±100
pA
VCM
Common-mode voltage range
(V-)–0.1
(V+)+0.1
V
CMRR
Common-mode rejection ratio
VCM=0.5 to 4.5V
100
120
dB
VO
Output Voltage Swing from rail
RL=10kΩ
10
25
mV
ISC
Short-circuit current
±60
mA
GBWP
Unity Gain Bandwidth
CL=100pF
350
kHz
SR
Slew rate
G=+1, CL=100pF
0.16
V/μs
tOR
Overload recovery time
G=-10
60
μs
tS
Settling time to 0.01%
CL=100Pf, G=+1, 5V Step
40
μs
AVOL
Open-Loop Voltage Gain
(V-)+100mV<VO<(V+)-100mV,
RL = 100kΩ
100
120
dB
θJA
Thermal Resistance Junction to
Ambient
SC70-5 (SOT353)
250
° C/W
SOT23-5
200
MSOP-8
210
SOIC-8
158
SOIC-14
83
TSSOP-14
100
4
REV B www.3peakic.com.cn
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
Typical Performance Characteristics
0
2
4
6
8
10
12
14
16
18
-12
-10
-8
-6
-4
-2
0
2
4
6
8
10
12
Population (%)
Offset Voltage (μV)
Offset Voltage Distribution
-60
-10
40
90
140
-60
-40
-20
0
20
40
60
80
100
120
1100 10k 1M
AOL(dB)
Frequency(Hz)
OPEN-LOOP GAIN vs FRENQUENCY
Phase(deg)
0
20
40
60
80
100
120
140
110 100 1k 10k 100k 1M
CMRR(dB)
Frequency(Hz)
CMRR vs FREQUENCY
0
20
40
60
80
100
120
140
110 100 1k 10k 100k 1M
PSRR(dB)
Frequency(Hz)
PSRR vs FREQUENCY
-PSRR
+PSRR
-3
-2
-1
0
1
2
3
0 5 10 15 20 25 30 35 40 45 50 55 60
Output Swing(V)
Output current(mA)
OUTPUT SWING vs LOAD CURRENT
25°
C
125°
C
25。
C
125。
C
125。
C
25。
C-40。
C
-10
-8
-6
-4
-2
0
2
4
6
8
10
-50 -25 025 50 75 100 125
Vos(μV)
Temperature(°C)
Offset Voltage vs TEMPERATURE
V = ±2.5V
5
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
www.3peakic.com.cn REV B
Typical Performance Characteristics
(continue)
Large-Scale Step Response
Output Voltage (2V/div)
Time (50μs/div)
G = +1
R
L=
10KΩ
-100
-80
-60
-40
-20
0
20
40
60
80
100
0 1 2 3 4 5
IB(pA)
Common-Mode Voltage(V)
IB vs COMMON-MODE VOLTAGE
10
100
1000
10000
-50 -25 025 50 75 100 125
IB(pV)
Temperature(°C)
INPUT BIAS vs TEMPERATURE
-2
-1.5
-1
-0.5
0
0.5
1
1.5
2
0 1 2 3 4 5
Vos(μV)
Common-Mode Voltage(V)
Vosvs COMMON-MODE VOLTAGE
0
5
10
15
20
25
30
35
40
45
-50 -25 025 50 75 100 125 150
IQ(μV)
Temperature(°C)
QUIESCENT CURRENT vs TEMPERATURE
0
20
40
60
80
100
120
140
160
27.5
28.25
29
29.75
30.5
31.25
32
32.75
33.5
34.25
35
35.75
36.5
37.25
38
38.75
39.5
40.25
41
41.75
42.5
43.25
44
44.75
POPULATION
Iq (μA)
Quiescent Current Distribution
6
REV B www.3peakic.com.cn
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
Typical Performance Characteristics
(continue)
Small-Scale Step Response
Output Voltage (50mV/div)
Time (5μs/div)
G=+1
RL=10KΩ
Positive Over-Voltage Recovery
2V/div
Time (50μs/div)
1V/div
Input
Output
Negative Over-Voltage Recovery
Time (50μs/div)
1V/div
1V/div
Input
Output
500nV/div
5s/div
0.1Hz TO 10Hz NOISE
10
100
0.01 0.1 1 10 100 1k 10k
Votage noise (nV/√Hz)
Frequency (Hz)
VOLTAGE NOISE SPECTRAL DENSITY vs
FREQUENCY
7
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
www.3peakic.com.cn REV B
Typical Applications
Bi-Directional Current Sense Amplifier
VDD +1.8V to +5.5V
VREF
VSENSE
499 kΩ
4.99 kΩ
4.99 kΩ
499 kΩ
ISENSE+
ISENSE-
0.1 Ω
TP5531
Thermistor Measurement
100 kΩ
60 kΩ
TP5531
1 MΩ
1 MΩNTC
Thermistor
3 V
8
REV B www.3peakic.com.cn
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
Pin Functions
-IN: Inverting Input of the Amplifier.
+IN: Non-Inverting Input of Amplifier.
OUT: Amplifier Output. The voltage range extends to
within mV of each supply rail.
V+ or +Vs: Positive Power Supply. Typically the voltage
is from 1.8V to 5.5V. Split supplies are possible as long
as the voltage between V+ and V– is between 1.8V and
5.5V. A bypass capacitor of 0.1μF as close to the part as
possible should be used between power supply pins or
between supply pins and ground.
V- or -Vs: Negative Power Supply. It is normally tied to
ground. It can also be tied to a voltage other than ground
as long as the voltage between V+ and V– is from 1.8V to
5.5V. If it is not connected to ground, bypass it with a
capacitor of 0.1μF as close to the part as possible.
Operation
The TP553x series op amps are zero drift, rail-to-rail operation amplifiers that can be run from a single-supply voltage.
They use an auto-calibration technique with a time-continuous 350 kHz op amp in the signal path while consuming only
42 μA of supply current per channel. This amplifier is zero-corrected with an 120 kHz clock. Upon power-up, the
amplifier requires approximately 100 μs to achieve specified VOS accuracy. This design has no aliasing or flicker noise.
Applications Information
Rail-To-Rail Input And Output
The TP553x series op amps feature rail-to-rail input and output with a supply voltage from 1.8V to 5.5 V. This allows
the amplifier inputs to have a wide common mode range (50mV beyond supply rails) while maintaining high CMRR
(130dB) and maximizes the signal to noise ratio of the amplifier by having the VOH and VOL levels be at the V+ and V-
rails, respectively.
Input Protection
The TP553x series op amps have internal ESD protection diodes that are connect between the inputs and supply rail.
When either input exceeds one of the supply rails by more than 300mV, the ESD diodes become forward biased and
large amounts of current begin to flow through them. Without current limiting, this excessive fault current causes
permanent damage to the device. Thus an external series resistor must be used to ensure the input currents never
exceed 10mA.
IOVERLOAD
10 mA Max.
VIN
TP5531 VOUT
+2.5 V
-2.5 V
5 kΩ
Current-limiting resistor required if input
voltage exceeds supply rails by >0.5V.
IN+
IN-
V+
V-
500Ω
500Ω
INPUT ESD DIODE CURRENT LIMITING-
UNITY GAIN
9
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
www.3peakic.com.cn REV B
Low Input Referred Noise
Flicker noise, as known as 1/f noise, is inherent in semiconductor devices and increases as frequency decreases. So
at lower frequencies, flicker noise dominates, causing higher degrees of error for sub-Hertz frequencies or dc precision
application.
The TP553x series amplifiers are chopper stabilized amplifiers, the flicker noise is reduced greatly because of this
technique. This reduction in 1/f noise allows the TP553x to have much lower noise at dc and low frequency compared
to standard low noise amplifier.
Residual Voltage Ripple
The chopping technique can be used in amplifier design due to the internal notch filter. Although the chopping related
voltage ripple is suppressed, higher noise spectrum exists at the chopping frequency and its harmonics due to
residual ripple.
So if the frequency of input signal is nearby the chopping frequency, the signal maybe interfered by the residue ripple.
To further suppress the noise at the chopping frequency, it is recommended that a post filter be placed at the output
of the amplifier.
Broad Band and External Resistor Noise Considerations
The total broadband noise output from any amplifier is primarily a function of three types of noise: input voltage noise
from the amplifier, input current noise from the amplifier, and thermal (Johnson) noise from the external resistors used
around the amplifier. These noise sources are not correlated with each other and their combined noise can be summed
in a root sum squared manner. The full equation is given as:
2 2 1/2
[ 4 ( ) ]
n n s n s
e total e kTR i R
Where:
en= the input voltage noise density of the amplifier.
in= the input current noise of the amplifier.
RS= source resistance connected to the noninverting terminal.
k= Boltzmann’s constant (1.38x10-23J/K). T= ambient temperature in Kelvin (K).
The total equivalent rms noise over a specific bandwidth is expressed as:
,
n rms n
e e total BW
The input voltage noise density (en) of the TP553x is 55 nV/√Hz, and the input current noise can be neglected. When
the source resistance is 190 kΩ, the voltage noise contribution from the source resistor and the amplifier are equal.
With source resistance greater than 190 kΩ, the overall noise of the system is dominated by the Johnson noise of the
resistor itself.
High Source Impedance Application
The TP553x series op amps use switches at the chopper amplifier input, the input signal is chopped at 125 kHz to
reduce input offset voltage down to 10µV. The dynamic behavior of these switches induces a charge injection current
to the input terminals of the amplifier. The charge injection current has a DC path to ground through the resistances
seen at the input terminals of the amplifier. Higher input impedance causes an apparent shift in the input bias current
of the amplifier.
Because the chopper amplifier has charge injection currents at each terminal, the input offset current will be larger than
standard amplifiers. The IOS of TP553x are 150pA under the typical condition. So the input impedance should be
10
REV B www.3peakic.com.cn
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
balanced across each input. The input impedance of the amplifier should be matched between the IN+ and IN- terminals
to minimize total input offset current. Input offset currents show up as an additional output offset voltage, as shown in
the following equation:
,
os total os f os
v v R I
For a gain configure using 1MΩ feedback resistor, a 150pA total input offset current will have an additional output
offset voltage of 0.15mV. By keeping the input impedance low and balanced across the amplifier inputs, the input
offset current effect will be suppressed efficiently.
TP5531
Ri
+2.5V
-2.5V
Rf
Vref
Rs
Rb
Vout
Vref
VIN
Circuit Implication for reducing Input offset current effect
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. It is recommended to
use multi-layer PCB layout and route the OPA’s -IN and +IN signal under the PCB surface.
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 2 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.
VI N + VI N - +VS
Guard Ring
The Layout of Guard Ring
11
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
www.3peakic.com.cn REV B
Package Outline Dimensions
SOT23-5
12
REV B www.3peakic.com.cn
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
Package Outline Dimensions
SC-70-5 (SOT353)
13
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
www.3peakic.com.cn REV B
Package Outline Dimensions
SOP-8 (SOIC-8)
14
REV B www.3peakic.com.cn
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
Package Outline Dimensions
MSOP-8
15
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
www.3peakic.com.cn REV B
Package Outline Dimensions
DFN-8 2*2
16
REV B www.3peakic.com.cn
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
Package Outline Dimensions
TSSOP-14
17
TP5531 / TP5532/TP5534
1.8V, 42μA, RRIO, Zero Drift Op-amps
www.3peakic.com.cn REV B
Package Outline Dimensions
SOP-14 (SOIC-14)