Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp Multi-purpose SOIC 8

+In B

–In B

Out B

V+

V–

+In A

–In A

Out A

OPA2348

D PACKAGE

(TOP VIEW)

OPA4348

PW PACKAGE

(TOP VIEW)

Out D

–In D

+In D

V–

+In C

–In C

Out C

Out A

–In A

_In A

V+

+In B

–In B

Out B

OPA2348-Q1

OPA4348-Q1

www.ti.com

SBOS465A –JANUARY 2009–REVISED MARCH 2010

1-MHz 45-µA CMOS RAIL-TO-RAIL OPERATIONAL AMPLIFIER

Check for Samples: OPA2348-Q1, OPA4348-Q1

FEATURES

• Qualified for Automotive Applications

• Low Quiescent Current (I

): 45 µA (Typ)

• Low Cost

• Rail-to-Rail Input and Output

• Single Supply: 2.1 V to 5.5 V

• Input Bias Current: 0.5 pA (Typ)

• High Speed:Power With Bandwidth: 1 MHz

APPLICATIONS

• Portable Equipment

• Battery-Powered Equipment

• Smoke Alarms

• CO Detectors

• Medical Instrumentation

DESCRIPTION

The OPAx348 series amplifiers are single-supply low-power CMOS operational amplifiers. Featuring an extended

bandwidth of 1 MHz and a supply current of 45 µA, the OPAx348 is useful for low-power applications on single

supplies of 2.1 V to 5.5 V.

Low supply current of 45 µA and an input bias current of 0.5 pA make the OPAx348 an optimal candidate for

low-power high-impedance applications such as smoke detectors and other sensors.

The OPA2348 is available in the SOIC-8 (D) package, and the OPA4348 is available in the TSSOP-14 (PW)

package. The automotive temperature range of –40°C to 125°C over all supply voltages offers additional design

flexibility.

ORDERING INFORMATION

(1)

PACKAGE

(2)

ORDERABLE PART NUMBER TOP-SIDE MARKING

SOIC – D Reel of 2500 OPA2348AQDRQ1 2348Q

–40°C to 125°C

TSSOP – PW Reel of 2000 OPA4348AQPWRQ1 OP4348Q

(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

web site at www.ti.com.

(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

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.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (18 pages)

PAGE 1
OPA2348-Q1 OPA4348-Q1 www.ti.com SBOS465A – JANUARY 2009 – REVISED MARCH 2010 1-MHz 45-µA CMOS RAIL-TO-RAIL OPERATIONAL AMPLIFIER Check for Samples: OPA2348-Q1, OPA4348-Q1 FEATURES 1 • • • • • • • OPA2348 D PACKAGE (TOP VIEW) Qualified for Automotive Applications Low Quiescent Current (IQ): 45 µA (Typ) Low Cost Rail-to-Rail Input and Output Single Supply: 2.1 V to 5.5 V Input Bias Current: 0.
PAGE 2
OPA2348-Q1 OPA4348-Q1 SBOS465A – JANUARY 2009 – REVISED MARCH 2010 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
PAGE 3
OPA2348-Q1 OPA4348-Q1 www.ti.com SBOS465A – JANUARY 2009 – REVISED MARCH 2010 ELECTRICAL CHARACTERISTICS VS = 2.5 V to 5.5 V, RL = 100 kΩ connected to VS/2, VOUT = VS/2 (unless otherwise noted) PARAMETER TEST CONDITIONS VOS Input offset voltage VS = 5 V, VCM = (V–) + 0.8 V ΔVOS/ ΔT Offset voltage drift over temperature PSRR Offset voltage drift vs power supply Offset voltage channel separation VS = 2.5 V to 5.5 V, VCM < (V+) – 1.
PAGE 4
OPA2348-Q1 OPA4348-Q1 SBOS465A – JANUARY 2009 – REVISED MARCH 2010 www.ti.com TYPICAL CHARACTERISTICS TA = 25°C, RL = 100 kΩ connected to VS/2, VOUT = VS/2 (unless otherwise noted) OPEN-LOOP GAIN AND PHASE vs FREQUENCY PSRR AND CMRR vs FREQUENCY 140 100 0 80 –45 80 Gain 60 Phase –90 40 20 –135 PSRR, CMRR (dB) 100 Phase (°) Open-Loop Gain (dB) 120 CMRR 60 40 PSRR 20 0 –20 0.
PAGE 5
OPA2348-Q1 OPA4348-Q1 www.ti.com SBOS465A – JANUARY 2009 – REVISED MARCH 2010 TYPICAL CHARACTERISTICS (continued) TA = 25°C, RL = 100 kΩ connected to VS/2, VOUT = VS/2 (unless otherwise noted) OPEN-LOOP GAIN AND PSRR vs TEMPERATURE COMMON-MODE REJECTION vs TEMPERATURE 130 100 Open-Loop Gain and Power Supply Rejection (dB) Common-Mode Rejection (dB) AOL, RL = 100kΩ 90 V– < V CM < (V+) – 1.
PAGE 6
OPA2348-Q1 OPA4348-Q1 SBOS465A – JANUARY 2009 – REVISED MARCH 2010 www.ti.
PAGE 7
OPA2348-Q1 OPA4348-Q1 www.ti.com SBOS465A – JANUARY 2009 – REVISED MARCH 2010 APPLICATION INFORMATION OPA2348 op amps are unity-gain stable and suitable for a wide range of general-purpose applications. The OPA2348 features wide bandwidth and unity-gain stability with rail-to-rail input and output for increased dynamic range. Figure 1 shows the input and output waveforms for the OPA2348 in unity-gain configuration. Operation is from a single 5-V supply with a 100-kΩ load connected to VS/2.
PAGE 8
OPA2348-Q1 OPA4348-Q1 SBOS465A – JANUARY 2009 – REVISED MARCH 2010 www.ti.com OFFSET VOLTAGE vs FULL COMMON-MODE VOLTAGE RANGE 2 Offset Voltage (mV) 1.5 1 0.5 0 –0.5 –1 V– V+ –1.5 –2 –0.5 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 Common-Mode Voltage (V) Figure 2. Behavior of Typical Transition Region at Room Temperature Rail-to-Rail Input The input common-mode range extends from (V–) – 0.2 V to (V+) + 0.2 V. For normal operation, inputs should be limited to this range.
PAGE 9
OPA2348-Q1 OPA4348-Q1 www.ti.com SBOS465A – JANUARY 2009 – REVISED MARCH 2010 Rail-to-Rail Output A class AB output stage with common-source transistors is used to achieve rail-to-rail output. This output stage is capable of driving 5-kΩ loads connected to any potential between V+ and ground. For light resistive loads (>100 kΩ), the output voltage can typically swing to within 18 mV from supply rail.
PAGE 10
OPA2348-Q1 OPA4348-Q1 SBOS465A – JANUARY 2009 – REVISED MARCH 2010 www.ti.com Driving Analog-to-Digital Converters (ADCs) The OPA2348 op amps are optimized for driving medium-speed sampling ADCs. The OPA2348 op amps buffer the ADC input capacitance and resulting charge injection while providing signal gain. Figure 7 shows the OPA2348 in a basic noninverting configuration driving the ADS7822. The ADS7822 is a 12-bit, micropower sampling converter in the MSOP-8 package.
PAGE 11
PACKAGE OPTION ADDENDUM www.ti.com 16-Apr-2010 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty OPA2348AQDRQ1 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR OPA4348AQPWRQ1 ACTIVE TSSOP PW 14 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR Lead/Ball Finish MSL Peak Temp (3) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
PAGE 12
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant OPA2348AQDRQ1 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 OPA4348AQPWRQ1 TSSOP PW 14 2500 330.0 12.4 6.9 5.6 1.6 8.0 12.
PAGE 13
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) OPA2348AQDRQ1 SOIC D 8 2500 367.0 367.0 35.0 OPA4348AQPWRQ1 TSSOP PW 14 2500 367.0 367.0 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.