Datasheet

ManualsBrandsANALOG DEVICES ManualsPMICsPMIC - voltage reference Series Adjustable PDIP 8

2.5 V Precision

Voltage Reference

REF03

Rev. G

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FEATURES

2.5 voltage output, ±0.6% maximum

Wide input voltage range: 4.5 V to 33 V

Supply current: 1.4 mA maximum

Output voltage temperature coefficient: 50 ppm/°C

maximum

Line regulation: 50 ppm/V maximum

Load regulation: 100 ppm/mA maximum

Extended industrial temperature range: −40°C to +85°C

Low cost

GENERAL DESCRIPTION

The REF03 precision voltage reference provides a stable 2.5 V

output, with minimal change for variations in supply voltage,

ambient temperature, or loading conditions. Single-supply

operation over an input voltage range of 4.5 V to 33 V with

a current drain of 1 mA and good temperature stability is

achieved using an improved band gap design. Primarily

targeted at price sensitive applications, the REF03 is available

in plastic PDIPs and surface-mount small outline plastic

packages. For improved performance or −40°C to +125°C

operation, see the

ADR03 data sheet.

PIN CONFIGURATION

00372-001

REF03

TOP VIEW

(Not to Scale)

TEMP

GND

OUT

TRIM

NOTES

1. NC = NO CONNECT. DO NOT CONNECT ANYTHING

ON THESE PINS. SOME OF THEM ARE RESERVED

FOR FACTORY TESTING PURPOSES.

2. TRIM PIN AND V

TEMP

PIN SHOULD BE LEFT

FLOATING IF THEY ARE NOT BEING USED.

Figure 1. 8-Lead PDIP (P-Suffix),

8-Lead SOIC (S-Suffix)

00372-002

R10

OUTPUT

GROUND

R12

16.7kΩ

TRIM

Q19

R15

INPU

Q15

Q18

Q16

Q13

Q21

Q17

R13

Q20

Q14

Q12

Q11

R14

Q10

R11

2kΩ

50kΩ

≈

1.23V

Figure 2. Simplified Schematic

Summary of content (12 pages)

PAGE 1
2.5 V Precision Voltage Reference REF03 FEATURES PIN CONFIGURATION 2.5 voltage output, ±0.6% maximum Wide input voltage range: 4.5 V to 33 V Supply current: 1.4 mA maximum Output voltage temperature coefficient: 50 ppm/°C maximum Line regulation: 50 ppm/V maximum Load regulation: 100 ppm/mA maximum Extended industrial temperature range: −40°C to +85°C Low cost NC 1 8 REF03 NC NC TOP VIEW 6 VOUT (Not to Scale) GND 4 5 TRIM VIN 2 7 NOTES 1. NC = NO CONNECT. DO NOT CONNECT ANYTHING ON THESE PINS.
PAGE 2
REF03 TABLE OF CONTENTS Features .............................................................................................. 1 Applications........................................................................................7 General Description ......................................................................... 1 Generating an Adjustable Bipolar Voltage Reference...............7 Pin Configuration.............................................................................
PAGE 3
REF03 ELECTRICAL SPECIFICATIONS @ VIN = 15 V, −40°C ≤ TA ≤ +85°C, unless otherwise noted. Table 1. Parameter Output Voltage Output Voltage Tolerance Output Voltage Temperature Coefficient 1 Line Regulation Symbol VO Conditions No load No load TCVO VIN = 4.
PAGE 4
REF03 ABSOLUTE MAXIMUM RATINGS Table 3. Package Thermal Resistance TA = 25°C, unless otherwise noted. Absolute maximum ratings apply to both DICE and packaged parts, unless otherwise noted. Package Type 8-Lead PDIP (P-Suffix) 8-Lead SOIC (S-Suffix) Table 2.
PAGE 5
REF03 TYPICAL PERFORMANCE CHARACTERISTICS 20 35 VIN = 15V 30 18 17 16 15 14 10 15 20 25 30 35 40 INPUT VOLTAGE (V) 25 20 15 10 5 0 –40 20 40 100 VIN = 15V 55 50 16 20 24 28 32 0.9 0.8 –40 –20 0 20 40 Figure 6. Load Regulation (∆IL = 10 mA) vs. Input Voltage 92 82 LINE REGULATION (dB) 150 100 16 20 24 INPUT VOLTAGE (V) 28 32 62 320 52 1000 42 3200 32 10000 100 1k 10k 100k Figure 10. Line Regulation vs. Frequency Rev.
PAGE 6
REF03 1.4 TA = 25°C VIN = 15V 0.1Hz TO 10Hz VIN = 15V LOAD REG – TEMP/LOAD REG (25°C) 1.3 1.2 1.1 1.0 0.9 0.8 –20 0 20 40 60 80 100 TEMPERATURE (°C) 3.2 5.9 8.6 OUTPUT VOLTAGE NOISE (µV p-p) Figure 11. Normalized Load Regulation (∆IL = 10 mA) vs. Temperature 00372-013 0.6 –40 00372-011 0.7 Figure 13. Typical Distribution of Output Voltage Noise 1000 –40°C ≤ TA ≤ +85°C VIN = 15V 100 1 10 100 1k 10k 100k 1M FREQUENCY (Hz) Figure 12. Wideband Output Noise vs. Bandwidth (0.
PAGE 7
REF03 APPLICATIONS Because an on-board operational amplifier is used to amplify the basic band gap cell voltage to 2.5 V, supply decoupling is critical to the transient performance of a voltage reference. The supply line should be bypassed with a 10 μF tantalum capacitor in parallel with a 0.01 μF to 0.1 μF ceramic capacitor for best results, as shown in Figure 15. The bypass capacitors should be located as close to the reference as possible. Inadequate bypassing can lead to instabilities.
PAGE 8
REF03 BOOST TRANSISTOR PROVIDES HIGH OUTPUT CURRENT CMOS DAC REFERENCE When applications require more than 10 mA current delivery, an external boost transistor may be added to the REF03 to pass the required current without dissipating excessive power within the IC. The maximum current output to the system is bounded only by the capabilities of the boost transistor. Figure 19 shows this technique, with and without current limiting. Current limiting may be used to prevent damage to the boost transistor.
PAGE 9
REF03 OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890) 1 5 6.20 (0.2441) 5.80 (0.2284) 4 1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0040) 1.75 (0.0688) 1.35 (0.0532) 0.51 (0.0201) 0.31 (0.0122) COPLANARITY 0.10 SEATING PLANE 0.50 (0.0196) 0.25 (0.0099) 45° 8° 0° 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.
PAGE 10
REF03 ORDERING GUIDE Part Number REF03GP REF03GPZ 1 REF03GS REF03GS-REEL REF03GS-REEL7 REF03GSZ1 REF03GSZ-REEL1 REF03GSZ-REEL71 1 Initial Accuracy (%) 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Temperature Coefficient 10 10 10 10 10 10 10 10 Temperature Range −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C −40°C to +85°C Z = RoHS Compliant Part. Rev.
PAGE 11
REF03 NOTES Rev.