Datasheet

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REF102

SBVS022B – SEPTEMBER 2000 – REVISED JUNE 2009

FEATURES

● +10V ±0.0025V OUTPUT

● VERY LOW DRIFT: 2.5ppm/°C max

● EXCELLENT STABILITY:

5ppm/1000hr typ

● EXCELLENT LINE REGULATION:

1ppm/V max

● EXCELLENT LOAD REGULATION:

10ppm/mA max

● LOW NOISE: 5

µV

typ, 0.1Hz to 10Hz

● WIDE SUPPLY RANGE: 11.4VDC to 36VDC

● LOW QUIESCENT CURRENT: 1.4mA max

● PACKAGE OPTIONS: PLASTIC DIP, SO-8

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.

10V Precision

Voltage Reference

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.

APPLICATIONS

● PRECISION-CALIBRATED VOLTAGE

STANDARD

● D/A AND A/D CONVERTER REFERENCE

● PRECISION CURRENT REFERENCE

● ACCURATE COMPARATOR THRESHOLD

REFERENCE

● DIGITAL VOLTMETER

● TEST EQUIPMENT

● PC-BASED INSTRUMENTATION

DESCRIPTION

The REF102 is a precision 10V voltage reference. The drift

is laser-trimmed to 2.5ppm/°C max C-grade over the indus-

trial temperature range. The REF102 achieves its precision

without a heater. This results in low power, fast warm-up,

excellent stability, and low noise. The output voltage is

extremely insensitive to both line and load variations and can

be externally adjusted with minimal effect on drift and

stability. Single-supply operation from 11.4V to 36V and

excellent overall specifications make the REF102 an ideal

choice for demanding instrumentation and system reference

applications.

–

50kΩ

22kΩ

7kΩ

4kΩ

8kΩ

Noise

Reduction

Common

OUT

V+

Trim

14kΩ

www.ti.com

Summary of content (20 pages)

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REF102 REF 102 REF 102 SBVS022B – SEPTEMBER 2000 – REVISED JUNE 2009 10V Precision Voltage Reference FEATURES APPLICATIONS ● +10V ±0.0025V OUTPUT ● VERY LOW DRIFT: 2.5ppm/°C max ● EXCELLENT STABILITY: 5ppm/1000hr typ ● EXCELLENT LINE REGULATION: 1ppm/V max ● EXCELLENT LOAD REGULATION: 10ppm/mA max ● LOW NOISE: 5µVPP typ, 0.
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ABSOLUTE MAXIMUM RATINGS(1) Input Voltage ...................................................................................... +40V Operating Temperature P, U ................................................................................. –25°C to +85°C Storage Temperature Range P, U ............................................................................... –40°C to +125°C Short-Circuit Protection to Common or V+ ..............................
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ELECTRICAL CHARACTERISTICS At TA = +25°C and VS = +15V power supply, unless otherwise noted. REF102A PARAMETER OUTPUT VOLTAGE Initial vs Temperature (1) vs Supply (Line Regulation) vs Output Current (Load Regulation) vs Time M Package P, U Packages (2) Trim Range (3) Capacitive Load, max NOISE CONDITIONS MIN TA = 25°C 9.99 TYP REF102B MAX MIN 10.01 10 9.995 TYP REF102C MAX MIN 10.005 5 9.9975 TYP MAX UNITS 10.0025 2.5 V ppm/°C VS = 11.
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TYPICAL CHARACTERISTICS At TA = +25°C, VS = +15V, unless otherwise noted. POWER TURN-ON RESPONSE with 1µF CN POWER TURN-ON RESPONSE VOUT VOUT VIN VIN Time (10ms/div) Time (5µs/div) Power Turn-On Power Turn-On POWER SUPPLY REJECTION vs FREQUENCY LOAD REGULATION +1.5 120 Output Voltage Change (mV) Power Supply Rejection (dB) 130 110 100 90 80 70 +1.0 +0.5 0 −0.5 −1.0 −1.5 60 1 100 1k 10k –5 0 1.
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TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, VS = +15V, unless otherwise noted. TYPICAL REF102 REFERENCE NOISE 20Ω 2kΩ Oscilloscope Noise Voltage (µV) 6 4 – 2 100µF DUT 0 15.8kΩ −2 2µF Gain = 100V/V f −3dB = 0.1Hz and 10Hz −4 −6 8kΩ OPA227 + Noise Test Circuit. Low Frequency Noise (1s/div) (See Noise Test Circuit) Refer to the diagram on the first page of this data sheet. The 10V output is derived from a compensated buried zener diode DZ1, op amp A1, and resistor network R1 – R6.
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INSTALLATION AND OPERATING INSTRUCTIONS BASIC CIRCUIT CONNECTION Figure 2 shows the proper connection of the REF102. To achieve the specified performance, pay careful attention to layout. A low resistance star configuration will reduce voltage errors, noise pickup, and noise coupled from the power supply. Commons should be connected as indicated, being sure to minimize interconnection resistances. used. The circuit in Figure 3 has a minimum trim range of ±300mV.
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APPLICATIONS INFORMATION OPTIONAL NOISE REDUCTION The high-frequency noise of the REF102 is dominated by the zener diode noise. This noise can be greatly reduced by connecting a capacitor between the Noise Reduction pin and ground. The capacitor forms a low-pass filter with R6 (refer to the figure on page 1) and attenuates the high-frequency noise generated by the zener. Figure 5 shows the effect of a 1µF noise reduction capacitor on the high-frequency noise of the REF102.
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V+ V+ V+ 2 220Ω – 6 REF102 2N2905 +10V OPA227 + 2 IL 2 R1 = VCC − 10V IL (TYP) 6 REF102 4 6 +10V +10V REF102 IL IL 4 a) −20mA < IL < +20mA (OPA227 also improves transient immunity) 4 b) −5mA < IL < +100mA c) IL (MAX) = IL (TYP) +10mA IL (MIN) = IL (TYP) −5mA FIGURE 7. +10V Reference With Output Current Boosted to: a) ±20mA, b) +100mA, and c) IL (TYP) +10mA, –5A. +15V 28mA 357Ω 1/2W 2 28.
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31.4V to 56V 2 V+ 2 +30V 6 REF102 6 +10V REF102 INA105 2 4 2 5 4 REF102 +20V 6 – 6 3 +5V + 4 2 1 REF102 +10V 6 FIGURE 13. +5V and +10V Reference. 4 V+ 2 NOTES: (1) REF102s can be stacked to obtain voltages in multiples of 10V. (2) The supply voltage should be between 10n + 1.4 and 10n + 26, where n is the number of REF102s. (3) Output current of each REF102 must not exceed its rated output current of +10, −5mA. This includes the current delivered to the lower REF102.
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Revision History DATE REVISION PAGE 6/09 B 2 SECTION DESCRIPTION Absolute Maximum Ratings Deleted lead temperature rating. Package/Ordering Information Changed Package Ordering Information table. NOTE: Page numbers for previous revisions may differ from page numbers in the current version. 10 REF102 www.ti.
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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.
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PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 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 REF102AU/2K5 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 REF102CU/2K5 SOIC D 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 26-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) REF102AU/2K5 SOIC D 8 2500 367.0 367.0 35.0 REF102CU/2K5 SOIC D 8 2500 367.0 367.0 35.
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