Datasheet

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INA332

INA2332

SBOS216B – SEPTEMBER 2001 - REVISED OCTOBER 2006

www.ti.com

DESCRIPTION

The INA332 and INA2332 are rail-to-rail output, low-power

CMOS instrumentation amplifiers that offer wide range, single-

supply, and bipolar-supply operation. Using a special manu-

facturing flow, the INA332 family provides the lowest cost

available, while still achieving low-noise amplification of dif-

ferential signals with low quiescent current of 415µA (drop-

ping to 0.01µA when shut down). Returning to normal opera-

tion within microseconds, this INA can be used for battery or

multichannel applications.

Configured internally in a gain of 5V/V, the INA332 offers

flexibility in higher gains by choosing external resistors.

FEATURES

● DESIGNED FOR LOW COST

● HIGH GAIN ACCURACY: G = 5, 0.07%, 2ppm/°C

● GAIN SET WITH EXT. RESISTORS FOR > 5V/V

● HIGH CMRR: 73dB DC, 50dB at 45kHz

● LOW BIAS CURRENT: 0.5pA

● BANDWIDTH, SLEW RATE: 2.0MHz, 5V/µs

● RAIL-TO-RAIL OUTPUT SWING: (V+) – 0.02V

● WIDE TEMPERATURE RANGE: –55°C to +125°C

● LOW QUIESCENT CURRENT: 490µA max/chan

● SHUTDOWN: 0.01µA

● MSOP-8 SINGLE AND TSSOP-14 DUAL PACKAGES

Low-Power, Single-Supply, CMOS

INSTRUMENTATION AMPLIFIERS

APPLICATIONS

● INDUSTRIAL SENSOR AMPLIFIERS:

Bridge, RTD, Thermocouple, Position

● PHYSIOLOGICAL AMPLIFIERS:

ECG, EEG, EMG

● A/D CONVERTER SIGNAL CONDITIONING

● DIFFERENTIAL LINE RECEIVERS WITH GAIN

● FIELD UTILITY METERS

● PCMCIA CARDS

● AUDIO AMPLIFIERS

● COMMUNICATION SYSTEMS

● TEST EQUIPMENT

● AUTOMOTIVE INSTRUMENTATION

The INA332 rejects line noise and its harmonics because

common-mode error remains low even at higher frequencies.

High bandwidth and slew rate make the INA332 ideal for

directly driving sampling Analog-to-Digital (A/D) converters

as well as general-purpose applications.

With high precision, low cost, and small packages, the

INA332 outperforms discrete designs.

Additionally, because they are specified for a wide tempera-

ture range of –55°C to +125°C, the INA332 family can be

used in demanding environments.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

INA2332

40kΩ

REF

–

10kΩ

ShutdownV+

OUT

G = 5 + 5(R

)

V–

40kΩ

Ch A

INA2332

INA332

Ch B

All trademarks are the property of their respective owners.

Summary of content (21 pages)

PAGE 1
INA3 32 INA 233 INA332 INA2332 ® 2 SBOS216B – SEPTEMBER 2001 - REVISED OCTOBER 2006 Low-Power, Single-Supply, CMOS INSTRUMENTATION AMPLIFIERS FEATURES APPLICATIONS ● ● ● ● ● ● DESIGNED FOR LOW COST HIGH GAIN ACCURACY: G = 5, 0.07%, 2ppm/°C GAIN SET WITH EXT. RESISTORS FOR > 5V/V HIGH CMRR: 73dB DC, 50dB at 45kHz LOW BIAS CURRENT: 0.5pA BANDWIDTH, SLEW RATE: 2.0MHz, 5V/µs ● ● ● ● ● RAIL-TO-RAIL OUTPUT SWING: (V+) – 0.
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ELECTROSTATIC DISCHARGE SENSITIVITY ABSOLUTE MAXIMUM RATINGS(1) Supply Voltage, V+ to V– .................................................................... 7.5V Signal Input Terminals, Voltage(2) ..................... (V–) – 0.5V to (V+) + 0.5V Current(2) ..................................................... 10mA Output Short-Circuit(3) .............................................................. Continuous Operating Temperature ..................................................
PAGE 3
ELECTRICAL CHARACTERISTICS: VS = +2.7V TO +5.5V BOLDFACE limits apply over the specified temperature range, TA = –55°C TO +125°C At TA = +25°C, RL = 10kΩ, G = 25, and VCM = VS /2, unless otherwise noted. INA332AIDGK INA2332AIPW PARAMETER INPUT Input Offset Voltage, RTI Over Temperature Temperature Coefficient vs Power Supply Over Temperature Long-Term Stability Input Impedance Input Common-Mode Range Common-Mode Rejection Over Temperature CONDITION VOS dVOS/dT PSRR MIN TYP VS = +5V ±2 VS = +2.
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TYPICAL CHARACTERISTICS At TA = +25°C, VS = 5V, VCM = VS /2, RL = 10kΩ, and CL = 100pF, unless otherwise noted.
PAGE 5
TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, VS = 5V, VCM = VS /2, RL = 10kΩ, and CL = 100pF, unless otherwise noted.
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TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, VS = 5V, VCM = VS /2, RL = 10kΩ, and CL = 100pF, unless otherwise noted.
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TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, VS = 5V, VCM = VS /2, RL = 10kΩ, and CL = 100pF, unless otherwise noted. PERCENT OVERSHOOT vs LOAD CAPACITANCE SETTLING TIME vs GAIN 100 60 Output 2Vp-p Differential Input Drive Output 100mVp-p Differential Drive 90 80 40 Overshoot (%) Settling Time (µs) 50 0.01% 30 20 G=5 70 60 50 40 G = 25 30 10 20 0.
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TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, VS = 5V, VCM = VS /2, RL = 10kΩ, and CL = 100pF, unless otherwise noted. SLEW RATE vs TEMPERATURE INPUT BIAS CURRENT vs TEMPERATURE 8 10000 Input Bias Current (pA) 7 Slew Rate (V/µs) 6 5 4 3 2 1000 100 10 1 1 0 0.
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OPERATING VOLTAGE APPLICATIONS INFORMATION The INA332 family is fully specified over a supply range of +2.7V to +5.5V, with key parameters tested over the temperature range of –55°C to +125°C. Parameters that vary significantly with operating conditions, such as load conditions or temperature, are shown in the Typical Characteristics. The INA332 is a modified version of the classic two op amp instrumentation amplifier, with an additional gain amplifier.
PAGE 10
SETTING THE GAIN The ratio of R2 to R1, or the impedance between pins 1, 5, and 6, determines the gain of the INA332. With an internally set gain of 5, the INA332 can be programmed for gains greater than 5 according to the following equation: G = 5 + 5 (R2/R1) The INA332 is designed to provide accurate gain, with gain error less than 0.4%. Setting gain with matching TC resistors will minimize gain drift. Errors from external resistors will add directly to the error, and may become dominant error sources.
PAGE 11
SHUTDOWN MODE +5V The shutdown pin of the INA332 is nominally connected to V+. When the pin is pulled below 0.8V on a 5V supply, the INA332 goes into sleep mode within nanoseconds. For actual shutdown threshold, see typical characteristic curve, Shutdown Voltage vs Supply Voltage. Drawing less than 2µA of current, and returning from sleep mode in microseconds, the shutdown feature is useful for portable applications.
PAGE 12
OFFSET VOLTAGE ERROR CALCULATION FEEDBACK CAPACITOR IMPROVES RESPONSE The offset voltage (VOS) of the INA332AIDGK is specified at a maximum of 500µV with a +5V power supply and the common-mode voltage at VS/2. Additional specifications for power-supply rejection and common-mode rejection are provided to allow the user to easily calculate worst-case expected offset under the conditions of a given application.
PAGE 13
APPLICATION CIRCUITS Filtering can be modified to suit application needs by changing the capacitor value of the output filter. MEDICAL ECG APPLICATIONS Figure 9 shows the INA332 configured to serve as a low-cost ECG amplifier, suitable for moderate accuracy heart-rate applications such as fitness equipment. The input signals are obtained from the left and right arms of the patient. The common-mode voltage is set by two 2MΩ resistors. This potential through a buffer provides optional right leg drive.
PAGE 14
PACKAGE OPTION ADDENDUM www.ti.
PAGE 15
PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 (4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Top-Side Marking for that device. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
PAGE 16
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device INA2332AIPWR Package Package Pins Type Drawing TSSOP PW 14 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 2500 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 INA2332AIPWT TSSOP PW 14 250 180.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 INA332AIDGKR VSSOP DGK 8 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.
PAGE 17
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) INA2332AIPWR TSSOP PW 14 2500 367.0 367.0 35.0 INA2332AIPWT TSSOP PW 14 250 210.0 185.0 35.0 INA332AIDGKR VSSOP DGK 8 2500 367.0 367.0 35.0 INA332AIDGKT VSSOP DGK 8 250 210.0 185.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.