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OPA827

VoltageNoiseDensity(nV/ )ÖHz

0.1

100

Frequency(Hz)

10k101

100 1k 10k

V = 18V

INPUTVOLTAGENOISEDENSITY

vsFREQUENCY

0.1Hzto10HzNOISE

50nV/div

Time(1s/div)

OPA827

www.ti.com

SBOS376H –NOVEMBER 2006–REVISED MAY 2012

Low-Noise, High-Precision, JFET-Input

OPERATIONAL AMPLIFIER

Check for Samples: OPA827

FEATURES

DESCRIPTION

The OPA827 series of JFET operational amplifiers

• INPUT VOLTAGE NOISE DENSITY:

combine outstanding dc precision with excellent ac

4nV/√Hz at 1kHz

performance. These amplifiers offer low offset voltage

• INPUT VOLTAGE NOISE:

(150μV, max), very low drift over temperature

0.1Hz to 10Hz: 250nV

(0.5μV/°C, typ), low bias current (3pA, typ), and very

low 0.1Hz to 10Hz noise (250nV

, typ). The device

• INPUT BIAS CURRENT: 10pA (max)

operates over a wide supply voltage range, ±4V to

• INPUT OFFSET VOLTAGE: 150μV (max)

±18V on a low supply current (4.8mA/Ch, typ).

• INPUT OFFSET DRIFT: 2.0μV/°C (max)

Excellent ac characteristics, such as a 22MHz gain

• GAIN BANDWIDTH: 22MHz

bandwidth product (GBW), a slew rate of 28V/μs, and

• SLEW RATE: 28V/μs

precision dc characteristics make the OPA827 series

well-suited for a wide range of applications including

• QUIESCENT CURRENT: 4.8mA/Ch

16-bit to 18-bit mixed signal systems, transimpedance

• WIDE SUPPLY RANGE: ±4V to ±18V

(I/V-conversion) amplifiers, filters, precision ±10V

• PACKAGES: SO-8 and MSOP-8

front ends, and professional audio applications.

The OPA827 is available in both SO-8 and MSOP-8

APPLICATIONS

surface-mount packages, and is specified from –40°C

• ADC DRIVERS

to +125°C.

• DAC OUTPUT BUFFERS

• TEST EQUIPMENT

• MEDICAL EQUIPMENT

• PLL FILTERS

• SEISMIC APPLICATIONS

• TRANSIMPEDANCE AMPLIFIERS

• INTEGRATORS

• ACTIVE FILTERS

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.

2All trademarks are the property of their respective owners.

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 (27 pages)

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OP A8 OPA827 27 www.ti.com SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 Low-Noise, High-Precision, JFET-Input OPERATIONAL AMPLIFIER Check for Samples: OPA827 FEATURES DESCRIPTION • The OPA827 series of JFET operational amplifiers combine outstanding dc precision with excellent ac performance. These amplifiers offer low offset voltage (150μV, max), very low drift over temperature (0.5μV/°C, typ), low bias current (3pA, typ), and very low 0.1Hz to 10Hz noise (250nVPP, typ).
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OPA827 SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 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.
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OPA827 www.ti.com SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 ELECTRICAL CHARACTERISTICS: VS = ±4V to ±18V Boldface limits apply over the specified temperature range, TA = –40°C to +125°C. At TA = +25°C, RL = 10kΩ connected to midsupply, VCM = VOUT = midsupply, unless otherwise noted. OPA827AI PARAMETER CONDITIONS MIN TYP MAX UNIT OFFSET VOLTAGE Input Offset Voltage Drift vs Power Supply 75 150 μV dVOS/dT 0.1 2.0 μV/°C PSRR 0.
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OPA827 SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 www.ti.com ELECTRICAL CHARACTERISTICS: VS = ±4V to ±18V (continued) Boldface limits apply over the specified temperature range, TA = –40°C to +125°C. At TA = +25°C, RL = 10kΩ connected to midsupply, VCM = VOUT = midsupply, unless otherwise noted.
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OPA827 www.ti.com SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 TYPICAL CHARACTERISTICS: VS = ±18V At TA = +25°C, RL = 10kΩ connected to midsupply, and VCM = VOUT = midsupply, unless otherwise noted. INPUT VOLTAGE NOISE DENSITY vs FREQUENCY INTEGRATED INPUT VOLTAGE NOISE vs BANDWIDTH 100 Input Voltage Noise (mV) Voltage Noise Density (nV/ÖHz) 100 10 10 VPP 1 VRMS 0.1 Noise Bandwidth: 0.1Hz to indicated frequency. 0.01 1 0.1 1 10 100 1k 10k 1 10 1k 10k 100k 1M 10M Figure 1. Figure 2.
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OPA827 SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 www.ti.com TYPICAL CHARACTERISTICS: VS = ±18V (continued) At TA = +25°C, RL = 10kΩ connected to midsupply, and VCM = VOUT = midsupply, unless otherwise noted. OFFSET VOLTAGE PRODUCTION DISTRIBUTION OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION 25 15 10 5 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.
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OPA827 www.ti.com SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 TYPICAL CHARACTERISTICS: VS = ±18V (continued) At TA = +25°C, RL = 10kΩ connected to midsupply, and VCM = VOUT = midsupply, unless otherwise noted.
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OPA827 SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 www.ti.com TYPICAL CHARACTERISTICS: VS = ±18V (continued) At TA = +25°C, RL = 10kΩ connected to midsupply, and VCM = VOUT = midsupply, unless otherwise noted.
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OPA827 www.ti.com SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 TYPICAL CHARACTERISTICS: VS = ±18V (continued) At TA = +25°C, RL = 10kΩ connected to midsupply, and VCM = VOUT = midsupply, unless otherwise noted.
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OPA827 SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 www.ti.com TYPICAL CHARACTERISTICS: VS = ±18V (continued) At TA = +25°C, RL = 10kΩ connected to midsupply, and VCM = VOUT = midsupply, unless otherwise noted. POSITIVE OVERLOAD RECOVERY NEGATIVE OVERLOAD RECOVERY G = -10 G = -10 VIN 5V/div 5V/div VOUT 0V 10kW 0V 10kW 1kW VIN 1kW OPA827 VOUT OPA827 VIN VOUT VIN VOUT Time (0.5ms/div) Time (0.5ms/div) Figure 30. Figure 31.
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OPA827 www.ti.com SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 TYPICAL CHARACTERISTICS: VS = ±18V (continued) At TA = +25°C, RL = 10kΩ connected to midsupply, and VCM = VOUT = midsupply, unless otherwise noted. 1.0 0.010 0.008 0.8 0.008 0.6 0.006 0.6 0.006 0.4 0.004 16-Bit Settling 0.2 0.002 0 0 -0.002 -0.2 (±1/2 LSB = ±0.00075%) -0.4 -0.004 -0.6 -0.006 -0.8 -1.0 100 200 300 400 500 600 Time (ns) D From Final Value (mV) 0.010 0.8 0.4 0.004 16-Bit Settling 0.2 0.002 0 0 -0.
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OPA827 SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 www.ti.com APPLICATION INFORMATION OPERATING VOLTAGE The OPA827 series of op amps can be used with single or dual supplies from an operating range of VS = +8V (±4V) and up to VS = +36V (±18V). This device does not require symmetrical supplies; it only requires a minimum supply voltage of 8V. Supply voltages higher than +40V (±20V) can permanently damage the device; see the Absolute Maximum Ratings table.
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OPA827 www.ti.com SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 Figure 42 illustrates both noninverting (A) and inverting (B) op amp circuit configurations with gain. In circuit configurations with gain, the feedback network resistors also contribute noise. The current noise of the op amp reacts with the feedback resistors to create additional noise components. The feedback resistor values can generally be chosen to make these noise sources negligible.
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OPA827 SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 www.ti.com TOTAL HARMONIC DISTORTION MEASUREMENTS of the circuit. The closed-loop gain is unchanged, but the feedback available for error correction is reduced by a factor of 101, thus extending the resolution by 101. Note that the input signal and load applied to the op amp are the same as with conventional feedback without R3. The value of R3 should be kept small to minimize its effect on the distortion measurements.
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OPA827 www.ti.com SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 Capacitive load drive depends on the gain and overshoot requirements of the application. Capacitive loads limit the bandwidth of the amplifier. Increasing the gain enhances the ability of the amplifier to drive greater capacitive loads (see Figure 28). PHASE-REVERSAL PROTECTION The OPA827 family has internal phase-reversal protection. Many FET-input op amps exhibit a phase reversal when the input is driven beyond its linear common-mode range.
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OPA827 SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 www.ti.com TRANSIMPEDANCE AMPLIFIER Bandwidth (f–3dB) calculated by Equation 2: The gain bandwidth, low voltage noise, and current noise of the OPA827 series make them ideal wide bandwidth transimpedance amplifiers in a photoconductive application. High transimpedance gains with feedback resistors greater than 100kΩ benefit from the low input current noise (2.2fA/Hz) of the JFET input.
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OPA827 www.ti.com SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 PHASE-LOCK LOOP The OPA827 is well-suited for phase-lock loop (PLL) applications because of the low voltage offset, low noise, and wide gain bandwidth. Figure 48 illustrates an example of the OPA827 in this application. The first amplifier (OPA827) provides the loop low-pass, active filter function, while the second amplifier (OPA211) serves as a scaling amplifier.
PAGE 18
OPA827 SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 www.ti.com OPA827 USED AS AN I/V CONVERTER NOTE: CODE is the digital input into the DAC. The OPA827 series of operation amplifiers have low current noise and offset voltage that make these devices a great choice for an I/V converter. The DAC8811 is a single channel, current output, 16-bit digital-to-analog converter (DAC). The IOUT terminal of the DAC is held at a virtual GND potential by the use of the OPA827 as an external I/V converter op amp.
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OPA827 www.ti.com SBOS376H – NOVEMBER 2006 – REVISED MAY 2012 REVISION HISTORY NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision G (February 2012) to Revision H Page • Updated Figure 3 .................................................................................................................................................................. 5 • Updated Figure 4 .....................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 18-Oct-2013 (5) Multiple Device Markings will be inside parentheses. Only one Device 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 Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line.
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PACKAGE MATERIALS INFORMATION www.ti.com 5-Jun-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing OPA827AIDGKR VSSOP DGK 8 OPA827AIDGKT VSSOP DGK OPA827AIDR SOIC D 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 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 5-Jun-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) OPA827AIDGKR VSSOP DGK 8 2500 367.0 367.0 35.0 OPA827AIDGKT VSSOP DGK 8 250 210.0 185.0 35.0 OPA827AIDR SOIC D 8 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.