Datasheet

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FEATURES

D BANDWIDTH: 20MHz

D SLEW RATE: 30V/µs

D FAST 16-BIT SETTLING TIME

D LOW NOISE: 6nV/√Hz (typ) at 100kHz

D EXCELLENT CMRR, PSRR, and A

D RAIL-TO-RAIL OUTPUT

D CM RANGE INCLUDES GND

D THD+N: 0.0003% (typ) at 1kHz

D QUIESCENT CURRENT: 5.5mA/ch (max)

D SUPPLY VOLTAGE: 4V to 12V

D SHUTDOWN MODE (OPAx726): 6µA/ch

APPLICATIONS

D OPTICAL NETWORKING

D TRANSIMPEDANCE AMPLIFIERS

D INTEGRATORS

D ACTIVE FILTERS

D A/D CONVERTER BUFFERS

D I/V CONVERTER FOR DACs

D PORTABLE AUDIO

D PROCESS CONTROL

D TEST EQUIPMENT

OPA725 RELATED PRODUCTS

FEATURES PRODUCT

10MHz, 16V, 16V/µs, 8.5nV/√Hz at 1kHz TLC080

8MHz, 36V, FET Input, 20V/µs, 8.5nV/√Hz at 1kHz OPA132

100MHz, 5.5V, Precision Transimpedance Amplifier OPA380

500MHz, ±5V, FET Input, 290V/µs, 7nV/√Hz at 100kHz OPA656

7MHz, 12V, RRIO, 10V/µs, 30nV/√Hz at 10kHz OPA743

16-Bit, 250kSPS, 4-Channel, Parallel Output ADC ADS8342

DESCRIPTION

The OPA725 and OPA726 series op amps use a

state-of-the-art 12V analog CMOS process, and combine

outstanding ac performance with low bias current and

excellent CMRR, PSRR, and A

. The 20MHz

Gain-Bandwidth (GBW) Product is achieved by using a

proprietary and patent-pending output stage design.

These characteristics allow excellent 16-bit settling times

for driving 16-bit Analog-to-Digital converters (ADCs).

Excellent ac characteristics, such as 20MHz GBW, 30V/µs

slew rate and 0.0003% THD+N make the OPA725 and

OPA726 well-suited for communication, high-end audio,

and active filter applications. With a bias current of less

than 200pA, they are well-suited for use as

transimpedance (I/V-conversion) amplifiers for monitoring

optical power in ONET applications.

The OPA725 and OPA726 op amps can be used in

single-supply applications from 4V up to 12V, or

dual-supply from ±2V to ±6V. The output swings to within

150mV of the rails, maximizing dynamic range. The

shutdown versions (OPAx726) reduce the quiescent

current to less than 6µA and feature a reference pin for

easy shutdown operation with standard CMOS logic in

dual-supply applications.

The OPA725 (single) is available in SOT23-5 and SO-8

packages, and the OPA2725 (dual) is available in MSOP-8

and SO-8 packages. The OPA726 (single with shutdown)

is available in MSOP-8 and SO-8. The OPA2726 (dual with

shutdown) is available in MSOP-10. All versions are

specified for operation from −40°C to +125°C.

−

OUT

+12V

Enable

OPA726

Ω

OPA725

ADS8342

16−Bit ADC

AIN

Common

330pF

2.5V

+5V

−

+5V

−

OPA725, OPA2725

OPA726, OPA2726

SBOS278B − SEPTEMBER 2003 − REVISED JANUARY 2004

Very Low Noise, High-Speed, 12V CMOS

Operational Amplifier

         

          

 !     !   

www.ti.com

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.

All trademarks are the property of their respective owners.

Summary of content (27 pages)

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OPA725, OPA2725 OPA726, OPA2726 SBOS278B − SEPTEMBER 2003 − REVISED JANUARY 2004 Very Low Noise, High-Speed, 12V CMOS Operational Amplifier FEATURES D D D D D D D D D D D DESCRIPTION BANDWIDTH: 20MHz SLEW RATE: 30V/µs FAST 16-BIT SETTLING TIME LOW NOISE: 6nV/√Hz (typ) at 100kHz EXCELLENT CMRR, PSRR, and AOL RAIL-TO-RAIL OUTPUT CM RANGE INCLUDES GND THD+N: 0.0003% (typ) at 1kHz QUIESCENT CURRENT: 5.
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"#$% #"#$ "#&% #"#& www.ti.
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"#$% #"#$ "#&% #"#& www.ti.
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"#$% #"#$ "#&% #"#& www.ti.com SBOS278B − SEPTEMBER 2003 − REVISED JANUARY 2004 ELECTRICAL CHARACTERISTICS: VS = +4V to +12V or VS = ±2V to ±6V Boldface limits apply over the specified temperature range, TA = −40°C to +125°C. At TA = +25°C, RL = 10kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted.
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"#$% #"#$ "#&% #"#& www.ti.com SBOS278B − SEPTEMBER 2003 − REVISED JANUARY 2004 ELECTRICAL CHARACTERISTICS: VS = +4V to +12V or VS = ±2V to ±6V (continued) Boldface limits apply over the specified temperature range, TA = −40°C to +125°C. At TA = +25°C, RL = 10kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted.
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"#$% #"#$ "#&% #"#& www.ti.com SBOS278B − SEPTEMBER 2003 − REVISED JANUARY 2004 TYPICAL CHARACTERISTICS At TA = +25°C, VS = ±6V, RL = 10kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted.
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"#$% #"#$ "#&% #"#& www.ti.com SBOS278B − SEPTEMBER 2003 − REVISED JANUARY 2004 TYPICAL CHARACTERISTICS (continued) At TA = +25°C, VS = ±6V, RL = 10kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted. INPUT BIAS CURRENT vs COMMON −MODE VOLTAGE OFFSET CURRENT vs TEMPERATURE 100k 10k +125_C 10k 1k +85_C 100 100 IOS (pA) +25_ C 10 IB < ±10pA −10 +25_C −100 −1k +85_ C −10k 0.1 −50 6.5 4.5 3.5 0.01 2.5 1.5 −0.5 −1.5 −2.5 −3.5 −4.5 −5.5 0.5 +125_ C −100k −6.
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"#$% #"#$ "#&% #"#& www.ti.com SBOS278B − SEPTEMBER 2003 − REVISED JANUARY 2004 TYPICAL CHARACTERISTICS (continued) At TA = +25°C, VS = ±6V, RL = 10kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted. SHORT−CIRCUIT CURRENT vs TEMPERATURE 90 4.8 80 4.6 70 Short−Circuit (mA) I Q per Amplifier (mA) QUIESCENT CURRENT vs SUPPLY VOLTAGE 5.0 4.4 4.2 4.0 3.8 3.6 Sourcing 60 50 Sinking 40 30 20 3.4 10 3.2 0 3.
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"#$% #"#$ "#&% #"#& www.ti.com SBOS278B − SEPTEMBER 2003 − REVISED JANUARY 2004 TYPICAL CHARACTERISTICS (continued) At TA = +25°C, VS = ±6V, RL = 10kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted. OFFSET VOLTAGE PRODUCTION DISTRIBUTION SMALL−SIGNAL OVERSHOOT vs CAPACITIVE LOAD 90 80 Population 60 G = +1 50 40 G = −1 CF = 3pF 30 20 0 10 100 1000 −3.3 −3.0 −2.7 −2.4 −2.1 −1.8 −1.5 −1.2 −0.9 −0.6 −0.3 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.
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"#$% #"#$ "#&% #"#& www.ti.com SBOS278B − SEPTEMBER 2003 − REVISED JANUARY 2004 TYPICAL CHARACTERISTICS (continued) At TA = +25°C, VS = ±6V, RL = 10kΩ connected to VS/2, and VOUT = VS/2, unless otherwise noted.
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"#$% #"#$ "#&% #"#& www.ti.com SBOS278B − SEPTEMBER 2003 − REVISED JANUARY 2004 APPLICATIONS INFORMATION a) Single−Supply Configuration OPA725 and OPA726 series 20MHz CMOS op amps have a fast slew rate, low noise, and excellent PSRR, CMRR, and AOL. These op amps can operate on typically 4.3mA quiescent current from a single (or split) supply in the range of 4V to 12V (±2V to ±6V), making them highly versatile and easy to use. They are stable in a unity-gain configuration.
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"#$% #"#$ "#&% #"#& www.ti.com SBOS278B − SEPTEMBER 2003 − REVISED JANUARY 2004 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 heavy loads connected to any point between V+ and V−. For light resistive loads ( > 100kΩ ), the output voltage can swing to 150mV (175mV for dual) from the supply rail, while still maintaining excellent linearity (AOL > 110dB).
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"#$% #"#$ "#&% #"#& www.ti.com SBOS278B − SEPTEMBER 2003 − REVISED JANUARY 2004 To achieve a maximally-flat, 2nd-order Butterworth frequency response, the feedback pole should be set to: 1 + 2pR FCF GBW Ǹ4pR C F (1) D Bandwidth is calculated by: f *3dB + GBW Hz Ǹ2pR C F (2) D For even higher transimpedance bandwidth, the high-speed CMOS OPA354 (100MHz GBW), OPA300 (180 MHz GBW), OPA355 (200MHz GBW), or OPA656, OPA657 (400MHz GBW) may be used.
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"#$% #"#$ "#&% #"#& www.ti.com SBOS278B − SEPTEMBER 2003 − REVISED JANUARY 2004 C3 2.2nF C1 1nF R1 1.93kΩ R2 15.9kΩ 1/2 OPA2725 C2 330pF R3 2.07kΩ R4 22.3kΩ 1/2 OPA2725 VOUT C4 100pF DC Gain = 1 Cutoff Frequency = 50kHz NOTE: FilterPro is a low-pass filter design program available for download at no cost from TI’s web site (www.ti.com). The program can be used to determine component values for other cutoff frequencies or filter types. Figure 7.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
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PACKAGE MATERIALS INFORMATION www.ti.com 19-Nov-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing OPA2725AIDGKR VSSOP DGK 8 OPA2725AIDGKT VSSOP DGK OPA2725AIDR SOIC D OPA2726AIDGST VSSOP OPA725AIDBVR 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 5.3 3.4 1.4 8.0 12.0 Q1 8 250 180.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 8 2500 330.0 12.4 6.4 5.2 2.1 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 19-Nov-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) OPA2725AIDGKR VSSOP DGK 8 2500 367.0 367.0 35.0 OPA2725AIDGKT VSSOP DGK 8 250 210.0 185.0 35.0 OPA2725AIDR SOIC D 8 2500 367.0 367.0 35.0 OPA2726AIDGST VSSOP DGS 10 250 210.0 185.0 35.0 OPA725AIDBVR SOT-23 DBV 5 3000 180.0 180.0 18.0 OPA725AIDBVT SOT-23 DBV 5 250 180.0 180.0 18.
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