TP1511N [3PEAK]

Stable 150kHz, 4Î¼A, Rail-to-Rail, EveryCapTM Op Amps;


型号：	TP1511N
厂家：	3PEAK
描述：	Stable 150kHz, 4Î¼A, Rail-to-Rail, EveryCapTM Op Amps
文件：	总18页 (文件大小：1508K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

Features

Description

TP151x series are CMOS single/dual/quad op-amps

with low offset, stable high frequency response, low

power, low supply voltage, and rail-to-rail inputs and

outputs. They incorporate 3PEAK’s proprietary and

patented design techniques to achieve best in-class

performance among all micro-power CMOS

amplifiers in its power class. The TP151x family can

be used as plug-in replacements for many



Stable 150kHz GBWP Over Temperature Range

Stable 150kHz GBWP in V_CMfrom 0-V to V_DD

0.09V/μs Slew Rate



Only 4μA of Supply Current per Amplifier

Shutdown Current: 0.1μA (TP1511N)



Up to 55 Years Operation from 2 AA Alkaline-Cells

Unity Gain Stable for ANY CAPACITIVE Load

Offset Voltage: 3.0mV Maximum

commercially available op-amps to reduce power

and improve input/output range and performance.

TP151x are unity gain stable with Any Capacitive

load with a constant 150kHz GBWP, 0.09V/μs slew

rate while consuming only 4μA of quiescent current

per amplifier. Analog trim and calibration routine

reduce input offset voltage to below 3.0mV, and

proprietary precision temperature compensation

technique makes offset voltage temperature drift at

0.6μV/°C. Beyond the rails input and rail-to-rail

output characteristics allow the full power-supply

voltage to be used for signal range.

Offset Voltage Temperature Drift: 0.6 μV/°C

Input Bias Current: 1pA Typical

High CMRR/PSRR: 110dB

No Phase Reversal for Overdriven Inputs

Beyond the Rails Input Common-Mode Range

Outputs Swing to within 5mV of Each Rail

Single +2.1V to +6.0V Supply Voltage Range

–40°C to 125°C Operation Range

This combination of features makes the TP151x

OPA 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. Battery Current Monitor, consumer devices,

handheld instrumentation, Remote battery-powered

sensors, hazard detection (for example, smoke, fire,

and gas), and patient monitors can benefit from the

features of the TP151x op-amps.

ESD Rating:

Robust 8KV – HBM, 2KV – CDM and 500V – MM



Green, Popular Type Package

Applications



Sensor Conditioning

Battery Current Sensing

IR thermometers

For applications that require power-down, the

TP1511N in popular type packages has a low-power

shutdown mode that reduces supply current to less

Digital Scales

than 0.1μA, and forces the output into

Automotive Keyless Entry

Toll Booth Tags

high-impedance state.

Data Acquisition Equipment

Battery or Solar Powered Systems

Active Filters, ASIC Input or Output Amplifier

Portable Instruments

3PEAK and the 3PEAK logo are registered trademarks of

3PEAK INCORPORATED. All other trademarks are the property

of their respective owners.

VDD

LOAD

IN+

IN-

VOUT

TP1511

RSENSE

Figure 1. TP1511 in Battery Monitoring Application

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REV A

TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

Pin Configuration(Top View)

TP1511

5-Pin SOT23/SC70

TP1511N

6-Pin SOT23

TP1512

8-Pin SOIC/MSOP

TP1514

14-Pin SOIC/TSSOP

-T and -C Suffixes

-T Suffix

-S and -V Suffixes

-S and -T Suffixes

13 ﹣In D

Out A

﹣In A

﹢In A

﹢Vs

Out D

﹢Vs

SHDN

-In

Out

﹣Vs

+In

Out A

﹢Vs

﹣In A

Out B

﹣In B

﹢In B

﹣Vs

﹢In D

﹣Vs

+In

-In

﹢In A

﹣Vs

10 ﹢In C

﹢In B

﹣In B

Out B

TP1511

TP1511N

8-Pin MSOP/SOIC

﹣In C

-V and -S Suffixes

Out C

﹣In

﹢In

﹣Vs

﹣In

﹢In

﹣Vs

SHDN

﹢Vs

Out

﹢Vs

Out

Order Information

Marking

Information

Model Name

Order Number

Package

Transport Media, Quantity

TP1511-TR

TP1511-CR

TP1512-SR

TP1512-VR

TP1514-SR

TP1514-TR

5-Pin SOT23

5-Pin SC70

8-Pin SOIC

Tape and Reel, 3000

Tape and Reel, 4000

Tape and Reel, 3000

Tape and Reel, 2500

Tape and Reel, 3000

A1TYW ^Note1

TP1511

Note1

A1CYW

1512S

A14S

A14T

TP1512

TP1514

8-Pin MSOP

14-Pin SOIC

14-Pin TSSOP

Note 1: ‘YW’ is date coding scheme. 'Y' stands for calendar year, and 'W' stands for single workweek coding scheme.

Note 1

Absolute Maximum Ratings

Supply Voltage: V⁺– V^–....................................6.0V

Input Voltage............................. V^–– 0.5 to V⁺+ 0.5

Input Current: +IN, –IN, SHDN ^{Note 2}.............. ±10mA

SHDN Pin Voltage……………………………V^–to V⁺

Output Current: OUT.................................... ±40mA

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.

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.

REV A

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TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

ESD, Electrostatic Discharge Protection

Symbol

HBM

Parameter

Human Body Model ESD

Machine Model ESD

Condition

Minimum Level

Unit

MIL-STD-883H Method 3015.8

JEDEC-EIA/JESD22-A115

JEDEC-EIA/JESD22-C101E

500

CDM

Charged Device Model ESD

5V Electrical Characteristics

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=100pF, V_SHDNis unconnected.

SYMBOL PARAMETER

CONDITIONS

V_CM= V_SUPPLY/2

MIN

-3.0

TYP

± 0.2

0.6

MAX

+3.0

UNITS

V_OS

V_OSTC

I_B

Input Offset Voltage

●

Input Offset Voltage Drift

Input Bias Current

μV/° C

1.0

I_OS

Input Offset Current

Input Voltage Noise

1.0

V_n

f = 0.1Hz to 10Hz

3.6

μV_P-P

f = 1kHz

f = 10kHz

e_n

Input Voltage Noise Density

Input Resistance

nV/√Hz

GΩ

R_IN

C_IN

>100

Differential

Common Mode

1.5

3.0

Input Capacitance

CMRR

V_CM

Common Mode Rejection Ratio

Common-mode Input Voltage Range

Power Supply Rejection Ratio

V_CM= 0.1V to 4.9V

●

V^–-0.3

110

V_DD+0.3

PSRR

110

102

V_OUT= 2.5V, R_LOAD= 100kΩ

V_OUT= 0.1V to 4.9V, R_LOAD= 100kΩ

R_LOAD= 100kΩ

A_VOL

Open-Loop Large Signal Gain

V_OL, V_OH

R_OUT

R_O

Output Swing from Supply Rail

Closed-Loop Output Impedance

Open-Loop Output Impedance

Output Short-Circuit Current

Supply Voltage

G = 1, f = 1kHz, I_OUT= 0

f = 1kHz, 10kHz, I_OUT= 0

Sink or source current

kΩ

I_SC

V_DD

2.1

6.0

5.6

I_Q

Quiescent Current per Amplifier

Supply Current in Shutdown ^{Note 1}

●

μA

I_Q(off)

0.1

V_SHDN= 0.5V

V_SHDN= 1.5V

-0.15

-20

I_SHDN

I_LEAK

Shutdown Pin Current ^{Note 1}

μA

Output Leakage Current in Shutdown V_SHDN= 0V, V_OUT= 0V

Note1

V_SHDN= 0V, V_OUT= 5V

V_IL

SHDN Input Low Voltage ^{Note 1}

SHDN Input High Voltage ^{Note 1}

Turn-On Time ^{Note 1}

Disable

●

0.5

V_IH

t_ON

t_OFF

Enable

1.0

SHDN Toggle from 0V to 5V

SHDN Toggle from 5V to 0V

R_LOAD= 100kΩ, C_LOAD= 100pF

μs

Turn-Off Time ^{Note 1}

Phase Margin

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REV A

TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

SYMBOL PARAMETER

CONDITIONS

MIN

TYP

-15

MAX

UNITS

Gain Margin

R_LOAD= 100kΩ, C_LOAD= 100pF

GBWP

Gain-Bandwidth Product

f = 1kHz

150

kHz

Settling Time, 1.5V to 3.5V, Unity

Gain

Settling Time, 2.45V to 2.55V, Unity

Gain

0.1%

0.01%

0.1%

0.01%

t_S

μs

A_V= 1, V_OUT= 1.5V to 3.5V, C_LOAD

= 100pF, R_LOAD= 100kΩ

Slew Rate

0.09

V/μs

FPBW

Full Power Bandwidth ^{Note 2}

2V_P-P

kHz

f=0.1kHz, A_V=1, R_L=100kΩ, V_OUT

2V_PP

-94

-70

THD+N

Total Harmonic Distortion and Noise

f=1kHz, A_V=1, R_L=100kΩ, V_OUT

2V_PP

Note 1: Specifications apply to the TP1511N with shutdown.

Note 2: Full power bandwidth is calculated from the slew rate FPBW = SR/π • V_P-P.

REV A

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TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

Typical Performance Characteristics

Small-Signal Step Response, 100mV Step

Large-Signal Step Response, 2V Step

Open-Loop Gain and Phase

Phase Margin vs. C_LOAD(Stable for Any C_LOAD)

110

90.0

80.0

70.0

60.0

50.0

40.0

30.0

20.0

10.0

0.0

Phase

Gain

-10

-30

-50

-70

100

10k 100k

FREQUENCY (Hz)

10M

1E-12 1E-11 1E-10 1E-09 1E-08 1E-07 1E-06

Load Capacitance (F)

Input Voltage Noise Spectral Density

Common-Mode Rejection Ratio

100k

140

V_DD=3.3V

120

100

10k

100

0.1

10 100

FREQUENCY (Hz)

10k

100

FREQUENCY (Hz)

10k

100k

10M

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REV A

TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

Typical Performance Characteristics

Over-Shoot Voltage, C_LOAD= 40nF, Gain = +1

Over-Shoot % vs. C_LOAD, Gain = -1, RFB = 20kΩ

Over-Shoot Voltage, C_LOAD=40nF, Gain= -1, RFB=100kΩ

Small-Signal Over-Shoot % vs. C_LOAD, Gain = +1

Power-Supply Rejection Ratio

V_IN= -0.2V to 5.7V, No Phase Reversal

V_DD=3.3V

100

10k

FREQUENCY (Hz)

100k

10M

REV A

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TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

Typical Performance Characteristics

Quiescent Supply Current vs. Temperature

Open-Loop Gain vs. Temperature

5.0

100.0

95.0

90.0

85.0

80.0

75.0

70.0

4.8

4.6

4.4

4.2

4.0

3.8

3.6

3.4

3.2

3.0

-40 -20

80 100 120

-40 -20

20 40 60 80 100 120

Temperature (^oC)

Quiescent Supply Current vs. Supply Voltage

Short-Circuit Current vs. Supply Voltage

5.0

60.0

55.0

50.0

45.0

40.0

35.0

30.0

25.0

20.0

15.0

10.0

5.0

4.5

4.0

3.5

3.0

2.5

2.0

0.0

Supply Voltage (V)

Input Offset Voltage Distribution

Closed-Loop Output Impedance vs. Frequency

100k

V_DD=3.3V

10k

100

10k

FREQUENCY (Hz)

100k

10M

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REV A

TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

Typical Performance Characteristics

THD+Noise, Gain = +1, V_IN= 100Hz, V_PP= 2V

THD+Noise, Gain = +1, V_IN= 1kHz, V_PP= 2V

0.1Hz to 10Hz Time Domain Output Voltage Noise

REV A

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TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

Pin Functions

–IN: Inverting Input of the Amplifier. Voltage range

of this pin can go from V^–– 0.3V to V⁺+ 0.3V.

-V_S: 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 2.1V to 5.25V. If it is not connected to ground,

bypass it with a capacitor of 0.1μF as close to the

part as possible.

+IN: Non-Inverting Input of Amplifier. This pin has

the same voltage range as –IN.

+V_S: Positive Power Supply. Typically the voltage is

from 2.1V to 5.25V. Split supplies are possible as

long as the voltage between V+ and V– is between

2.1V and 5.25V. 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.

SHDN: Active Low Shutdown. Shutdown threshold

is 1.0V above negative supply rail. If unconnected,

the amplifier is automatically enabled.

OUT: Amplifier Output. The voltage range extends

to within millivolts of each supply rail.

N/C: No Connection.

Operation

The TP151x family input signal range extends

beyond the negative and positive power supplies.

The output can even extend all the way to the

negative supply. The input stage is comprised of

two CMOS differential amplifiers, a PMOS stage

and NMOS stage that are active over different

ranges of common mode input voltage. The

Class-AB control buffer and output bias stage uses

a proprietary compensation technique to take full

advantage of the process technology to drive very

high capacitive loads. This is evident from the

transient over shoot measurement plots in the

Typical Performance Characteristics.

Applications Information

Low Supply Voltage and Low Power Consumption

The TP151x family of operational amplifiers can operate with power supply voltages from 2.1V to 6.0V. Each

amplifier draws only 4μA quiescent current. The low supply voltage capability and low supply current are ideal for

portable applications demanding HIGH CAPACITIVE LOAD DRIVING CAPABILITY and STABLE WIDE

BANDWIDTH. The TP151x family is optimized for wide bandwidth low power applications. They have an industry

leading high GBW to power ratio and are unity gain stable for ANY CAPACITIVE load. When the load capacitance

increases, the increased capacitance at the output pushed the non-dominant pole to lower frequency in the open

loop frequency response, lowering the phase and gain margin. Higher gain configurations tend to have better

capacitive drive capability than lower gain configurations due to lower closed loop bandwidth and hence higher

phase margin.

Low Input Referred Noise

The TP151x family provides a low input referred noise of 95nV/√Hz at 1kHz. The noise density will grow slowly

with the frequency in wideband range, and the input voltage noise density is typically 3.6μV_P-Pat the frequency of

0.1Hz to 10Hz.

Low Input Offset Voltage and Low Offset Voltage Temperature Drift

The TP151x family has a low offset voltage of 3.0mV maximum which is essential for precision applications. The

offset voltage is trimmed with a proprietary trim algorithm to ensure low offset voltage for precision signal

processing requirement. 3PEAK’s proprietary precision temperature compensation technique makes offset

voltage temperature drift at 0.6μV/°C.

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REV A

TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

Low Input Bias Current

The TP151x family is a CMOS OPA family and features very low input bias current in pA range. The low input

bias current allows the amplifiers to be used in applications with high resistance sources. Care must be taken to

minimize PCB Surface Leakage. See below section on “PCB Surface Leakage” for more details.

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 TP151x OPA’s input bias current at +27°C (±1pA, typical). 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 (V_IN+) to the input with a wire that does not touch the PCB surface.

b) Connect the guard ring to the inverting input pin (V_IN–). 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 (V_IN+). This biases the guard ring to the same reference voltage as

the op-amp (e.g., V_DD/2 or ground).

b) Connect the inverting pin (V_IN–) to the input with a wire that does not touch the PCB surface.

Guard Ring

VIN+

VIN-

+VS

Figure 2

Ground Sensing and Rail to Rail Output

The TP151x family has excellent output drive capability, delivering over 10mA of output drive current. The output

stage is a rail-to-rail topology that is capable of swinging to within 5mV of either rail. Since the inputs can go

500mV beyond either rail, the op-amp can easily perform ‘true ground’ sensing.

The maximum output current is a function of total supply voltage. As the supply voltage to the amplifier increases,

the output current capability also increases. Attention must be paid to keep the junction temperature of the IC

below 150°C when the output is in continuous short-circuit. The output of the amplifier has reverse-biased ESD

diodes connected to each supply. The output should not be forced more than 0.5V beyond either supply,

otherwise current will flow through these diodes.

ESD

The TP151x family has reverse-biased ESD protection diodes on all inputs and output. Input and out pins can

not be biased more than 300mV beyond either supply rail.

Shut-down

The single channel OPA versions have SHDN pins that can shut down the amplifier to less than 0.1μA supply

current. The SHDN pin voltage needs to be within 0.5V of V– for the amplifier to shut down. During shutdown, the

output will be in high output resistance state, which is suitable for multiplexer applications. When left floating, the

SHDN pin is internally pulled up to the positive supply and the amplifier remains enabled.

REV A

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TP1511/TP1511N/TP1512/TP1514

4μA, 150KHz, RRIO, True-Ground Sensing Op Amps

Driving Large Capacitive Load

The TP151x family of OPA is designed to drive large capacitive loads. Refer to Typical Performance

Characteristics for “Phase Margin vs. Load Capacitance”. As always, larger load capacitance decreases overall

phase margin in a feedback system where internal frequency compensation is utilized. As the load capacitance

increases, the feedback loop’s phase margin decreases, and the closed-loop bandwidth is reduced. This

produces gain peaking in the frequency response, with overshoot and ringing in output step response. The

unity-gain buffer (G = +1V/V) is the most sensitive to large capacitive loads.

When driving large capacitive loads with the TP151x OPA family (e.g., > 200 pF when G = +1V/V), a small series

resistor at the output (R_ISOin Figure 3) improves the feedback loop’s phase margin and stability by making the

output load resistive at higher frequencies.

RISO

VOUT

VIN

CLOAD

Figure 3

Low-Side Current Monitor Application

As shown in Figure 4. Please be noted: 1% resistors provide adequate common-mode rejection at small

ground-loop errors.

3 V

V-REF

+5 V

LOAD

IN-

RSHUNT

1Ω

TP1511

IN+

A/D

FS = 3.0 V

Stray Ground-loop Resistance

Figure 4

High-Side Current Monitor Application

As shown in Figure 5. Please be noted:

(1) Zener rated for op amp supply capability.

(2) Current-limiting resistor.

(3) Choose zener biasing resistor or dual N-MOSMETs.

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REV A

TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

R_G

Zener⁽¹⁾

RSHUNT

MOSFET rated

to stand-off

supply voltage

+Vs

IN-

R1⁽²⁾

10kΩ

TP1511

IN+

-Vs

+5 V

LOAD

RLOAD

2 zener biasing

RBIAS

methods are

shown.⁽³⁾

Figure 5

Window Comparator Application

As shown in Figure 6. Please be noted:

(1) R_INprotects A1 and A2 from possible excess current flow.

(2) IN4446 or equivalent diodes, and 2N2222 or equivalent NPN transistor.

(3) The threshold limits are set by V_Hand V_L, with V_H> V_L. When V_IN< V_H, the output of A1 is low. When V_IN> V_L,

the output of A2 is low. Therefore, both op amp outputs are at 0V as long as V_INis between V_Hand V_L. This

architecture results in no current flowing through either diode, Q1 in cutoff, with the base voltage at 0V, and

V_OUTforced high.

(4) If V_INfalls below V_L, the output of A2 is high, current flows through D2, and V_OUTis low. Likewise, if V_INrises

above V_H, the output of A1 is high, current flows through D1, and V_OUTis low.

(5) The window comparator threshold voltages are set as follows:

V_S

+Vs

V_S

V_H

IN-

A₁

TP1511

IN+

(2)

D₁

V_OUT

(1)

R₅

R_IN

(3)

Q₁

V_IN

+Vs

V_S

IN-

A₂

TP1511

V_L

IN+

(2)

D₂

V_H= [ R₂÷ (R₁+ R₂) ] × V_S

V_L= [ R₄÷ (R₃+ R₄) ] × V_S

Figure 6

Pulse Oximeter Current Source Application

A pulse oximeter is a noninvasive medical device used for continuously measuring the percentage of Hemoglobin

(Hb) saturated with oxygen and the pulse rate of a patient. Hemoglobin that is carrying oxygen (oxy-hemoglobin)

absorbs light in the infrared (IR) region of the spectrum; hemoglobin that is not carrying oxygen

(deoxy-hemoglobin) absorbs visible red (R) light. In pulse oximetry, a clip containing two LEDs (sometimes more,

depending on the complexity of the measurement algorithm) and the light sensor (photodiode) is placed on the

REV A

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TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

finger or earlobe of the patient. One LED emits red light (600 nm to 700 nm) and the other emits light in the near

IR (800 nm to 900 nm) region. The clip is connected by a cable to a processor unit. The LEDs are rapidly and

sequentially excited by two current sources (one for each LED), whose dc levels depend on the LED being driven,

based on manufacturer requirements, and the detector is synchronized to capture the light from each LED as it is

transmitted through the tissue.

An example design of a dc current source driving the red and infrared LEDs is shown in Figure 7. Pulse Oximeter

Red and Infrared Current Sources Using the TP1512 as a Buffer to the Voltage Reference Device.

Figure 7

Portable Gas Meter Application

Figure 8

Four-Pole, Low-pass Butterworth Filter for Glucose Monitor Application

There are several methods of glucose monitoring: spectroscopic absorption of infrared light in the 2 μm to 2.5 μm

range, reflectance spectrophotometry, and the amperometric type using electrochemical strips with glucose

oxidase enzymes. The amperometric type generally uses three electrodes: a reference electrode, a control

electrode, and a working electrode. Although this is a well established and widely used technique, signal-to-noise

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REV A

TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

ratio and repeatability can be improved using the TP1511/TP1512/TP1514 amplifiers with their low peak-to-peak

voltage noise of 3.6μV from 0.1 Hz to 10 Hz and voltage noise density of 95nV/√Hz at 1 kHz.

Another consideration is operation from a 3.3 V battery. Glucose signal currents are usually less than 3μA full

scale; therefore, the I-to-V converter requires low input bias current. The TP1511/TP1512/TP1514 are excellent

choices because these amplifiers provide 1pA typical and 10pA maximum of input bias current at ambient

temperature.

A low-pass filter with a cutoff frequency of 80Hz to 100Hz is desirable in a glucose meter device to remove

extraneous noise; this can be a simple two-pole or four-pole Butterworth filter. Low power op amps with

bandwidths of 50kHz to 500kHz should be adequate. The TP1511/TP1512/TP1514 amplifiers with their 150kHz

GBWP and 4μA typical current consumption meet these requirements. A circuit design of a four-pole Butterworth

filter (preceded by a one-pole, low-pass filter) is shown in Figure 9. With a 3.3 V battery, the total power

consumption of this design is 80μW typical at ambient temperature.

Figure 9

Two Op Amp Instrumentation Amplifier

The TP151x OPA series is well suited for conditioning sensor signals in battery-powered applications. Figure 10

shows a two op-amp instrumentation amplifier, using the TP151x OPA.

The circuit works well for applications requiring rejection of Common Mode noise at higher gains. The reference

voltage (V_REF) is supplied by a low-impedance source. In single voltage supply applications, V_REFis typically

V_DD/2.

Figure 10

REV A

www.3peakic.com.cn

TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

Package Outline Dimensions

SC70-5 /SOT-353

Dimensions

In Millimeters In Inches

Min Max Min Max

Dimensions

Symbol

0.900 1.100 0.035 0.043

0.000 0.100 0.000 0.004

0.900 1.000 0.035 0.039

0.150 0.350 0.006 0.014

0.080 0.150 0.003 0.006

2.000 2.200 0.079 0.087

1.150 1.350 0.045 0.053

2.150 2.450 0.085 0.096

0.650TYP

1.200 1.400 0.047 0.055

0.525REF 0.021REF

0.260 0.460 0.010 0.018

0° 8° 0° 8°

0.026TYP

SOT23-5

Dimensions

Symbol In Millimeters In Inches

Min Max Min Max

Dimensions

1.050 1.250 0.041 0.049

0.000 0.100 0.000 0.004

1.050 1.150 0.041 0.045

0.300 0.400 0.012 0.016

0.100 0.200 0.004 0.008

2.820 3.020 0.111 0.119

1.500 1.700 0.059 0.067

2.650 2.950 0.104 0.116

0.950TYP

1.800 2.000 0.071 0.079

0.700REF 0.028REF

0.300 0.460 0.012 0.024

0.037TYP

0°

8°

0°

8°

www.3peakic.com.cn

REV A

TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

Package Outline Dimensions

SOIC-8

Dimensions

Dimensions In

Inches

In Millimeters

Symbol

Min

Max

Min

Max

1.350

0.100

1.350

0.330

0.190

4.780

3.800

5.800

1.270TYP

0.400

0°

1.750

0.250

1.550

0.510

0.250

5.000

4.000

6.300

0.053

0.004

0.053

0.013

0.007

0.188

0.150

0.228

0.050TYP

0.016

0°

0.069

0.010

0.061

0.020

0.010

0.197

0.157

0.248

1.270

8°

0.050

8°

MSOP-8

Dimensions

Dimensions In

Inches

In Millimeters

Symbol

Min

Max

Min

Max

0.800

0.000

0.760

0.30 TYP

0.15 TYP

2.900

0.65 TYP

2.900

4.700

0.410

0°

1.200

0.200

0.970

0.031

0.000

0.030

0.012 TYP

0.006 TYP

0.114

0.026

0.114

0.185

0.016

0°

0.047

0.008

0.038

3.100

0.122

3.100

5.100

0.650

6°

0.122

0.201

0.026

6°

REV A

www.3peakic.com.cn

TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

Package Outline Dimensions

SOIC-14

Dimensions

In Millimeters

Symbol

MIN

NOM

1.60

0.15

1.45

0.65

MAX

1.35

0.10

1.25

0.55

0.36

0.35

0.16

0.15

8.53

5.80

3.80

1.75

0.25

1.65

0.75

0.49

0.45

0.25

8.73

6.20

4.00

0.40

0.20

8.63

6.00

3.90

1.27 BSC

0.60

0.45

0.80

1.04 REF

0.25 BSC

0.07

0.30

0°

0.40

0.50

8°

θ1

θ2

θ3

θ4

6°

8°

7°

10°

9°

6°

5°

9°

www.3peakic.com.cn

REV A

TP1511/TP1511N/TP1512/TP1514

Stable 150kHz, 4μA, Rail-to-Rail, EveryCap^TMOp Amps

Package Outline Dimensions

TSSOP-14

Dimensions

Symbol

In Millimeters

MIN

NOM

MAX

1.20

0.15

1.05

0.54

0.28

0.24

0.19

0.15

5.06

6.60

4.50

0.05

0.90

0.34

0.20

0.10

4.86

6.20

4.30

1.00

0.44

0.22

0.13

4.96

6.40

4.40

0.65 BSC

0.60

0.45

0.75

1.00 REF

0.25 BSC

0.09

0.20

θ1

θ2

θ3

0°

8°

10°

12°

14°

10°

REV A

www.3peakic.com.cn

TP1511N [3PEAK]

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