Datasheet

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2.5 V to 5.0 V Micropower, Precision

Series Mode Voltage References

Data Sheet

AD1582/AD1583/AD1584/AD1585

Rev. J Document Feedback

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FEATURES

Series reference (2.5 V, 3 V, 4.096 V, 5 V)

Low quiescent current: 70 µA maximum

Current output capability: ±5 mA

Wide supply range: V

= V

OUT

+ 200 mV to 12 V

Wideband noise (10 Hz to 10 kHz): 50 µV rms

Specified temperature range: −40°C to +125°C

Compact, surface-mount SOT-23 package

APPLICATIONS

Portable, battery-powered equipment; for example,

notebook computers, cellular phones, pagers, PDAs, GPSs,

and DMMs

Computer workstations; suitable for use with a wide range

of video RAMDACs

Smart industrial transmitters

PCMCIA cards

Automotive

Hard disk drives

3 V/5 V, 8-bit/12-bit data converters

PIN CONFIGURATION

OUT

GND

AD1582/

AD1583/

AD1584/

AD1585

TOP VIEW

(Not to Scale)

00701-001

Figure 1. 3-Lead SOT-23-3 (RT Suffix)

900

800

700

600

2.7 5

SHUNT REFERENCE

AD1582 SERIES REFERENCE

200

100

500

400

300

SUPPLY

(µA)

SUPPLY

(V)

3.076kΩ SOURCE RESISTOR.

00701-002

Figure 2. Supply Current (μA) vs. Supply Voltage (V)

GENERAL DESCRIPTION

The AD1582/AD1583/AD1584/AD1585 are low cost, low power,

low dropout, precision band gap references. These designs are

available as 3-terminal (series) devices and are packaged in the

compact SOT-23, 3-lead surface-mount package. The versatility

of these references makes them ideal for use in battery-powered

3 V or 5 V systems where there can be wide variations in supply

voltage and a need to minimize power dissipation.

The superior accuracy and temperature stability of the AD1582/

AD1583/AD1584/AD1585 result from the precise matching and

thermal tracking of on-chip components. Patented temperature

drift curvature correction design techniques minimize the

nonlinearities in the voltage output temperature characteristic.

The AD1582/AD1583/AD1584/AD1585 series mode devices

source or sink up to 5 mA of load current and operate efficiently

with only 200 mV of required headroom supply. These parts

draw a maximum 70 μA of quiescent current with only a

1.0 μA/V variation with supply voltage. The advantage of

these designs over conventional shunt devices is extraordinary.

Valuable supply current is no longer wasted through an input

series resistor, and maximum power efficiency is achieved at

all input voltage levels.

The AD1582/AD1583/AD1584/AD1585 are available in two

grades, A and B, and are provided in a tiny footprint, the SOT-

23. All grades are specified over the industrial temperature

range of −40°C to +125°C.

Table 1. AD158x Products, Three Electrical Grades

Electrical

Grade

Initial Accuracy Temperature

Coefficient

(ppm°C)

AD1582 AD1583/AD1585 AD1584

B 0.08% 0.10% 0.10% 50

A 0.80% 1.00% 0.98% 100

Summary of content (16 pages)

PAGE 1
2.5 V to 5.0 V Micropower, Precision Series Mode Voltage References AD1582/AD1583/AD1584/AD1585 Data Sheet PIN CONFIGURATION Series reference (2.5 V, 3 V, 4.
PAGE 2
AD1582/AD1583/AD1584/AD1585 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 10 Applications ....................................................................................... 1 Applications Information .............................................................. 11 Pin Configuration .....................................
PAGE 3
Data Sheet AD1582/AD1583/AD1584/AD1585 SPECIFICATIONS AD1582 SPECIFICATIONS TA = TMIN to TMAX, VIN = 5 V, unless otherwise noted. Table 2.
PAGE 4
AD1582/AD1583/AD1584/AD1585 Data Sheet AD1583 SPECIFICATIONS TA = TMIN to TMAX, VIN = 5 V, unless otherwise noted. Table 3. Parameter OUTPUT VOLTAGE (@ 25°C) VO INITIAL ACCURACY ERROR (@ 25°C) VOERR OUTPUT VOLTAGE TEMPERATURE DRIFT TEMPERATURE COEFFICIENT (TCVO) –40°C < TA < +125°C 0°C < TA < 70°C MINIMUM SUPPLY HEADROOM (VIN – VOUT) LOAD REGULATION 0 mA < IOUT < 5 mA (–40°C to +85°C) 0 mA < IOUT < 5 mA (–40°C to +125°C) –5 mA < IOUT < 0 mA (–40°C to +85°C) –5 mA < IOUT < 0 mA (–40°C to +125°C) –0.
PAGE 5
Data Sheet AD1582/AD1583/AD1584/AD1585 AD1584 SPECIFICATIONS TA = TMIN to TMAX, VIN = 5 V, unless otherwise noted. Table 4. Parameter OUTPUT VOLTAGE (@ 25°C) VO INITIAL ACCURACY ERROR (@ 25°C) VOERR OUTPUT VOLTAGE TEMPERATURE DRIFT TEMPERATURE COEFFICIENT (TCVO) −40°C < TA < +125°C 0°C < TA < 70°C MINIMUM SUPPLY HEADROOM (VIN – VOUT) LOAD REGULATION 0 mA < IOUT < 5 mA (−40°C to +85°C) 0 mA < IOUT < 5 mA (−40°C to +125°C) −5 mA < IOUT < 0 mA (−40°C to +85°C) −5 mA < IOUT < 0 mA (−40°C to +125°C) −0.
PAGE 6
AD1582/AD1583/AD1584/AD1585 Data Sheet AD1585 SPECIFICATIONS @ TA = TMIN to TMAX, VIN = 6 V, unless otherwise noted. Table 5. Parameter OUTPUT VOLTAGE (@ 25°C) VO INITIAL ACCURACY ERROR (@ 25°C) VOERR OUTPUT VOLTAGE TEMPERATURE DRIFT TEMPERATURE COEFFICIENT (TCVO) −40°C < TA < 125°C 0°C < TA < 70°C MINIMUM SUPPLY HEADROOM (VIN – VOUT) LOAD REGULATION 0 mA < IOUT < 5 mA (−40°C to +85°C) 0 mA < IOUT < 5 mA (−40°C to +125°C) −5 mA < IOUT < 0 mA (−40°C to +85°C) −5 mA < IOUT < 0 mA (−40°C to +125°C) −0.
PAGE 7
Data Sheet AD1582/AD1583/AD1584/AD1585 ABSOLUTE MAXIMUM RATINGS Table 6. Parameter VIN to Ground Internal Power Dissipation 1 SOT-23-3 (RT-3) Storage Temperature Range Specified Temperature Range AD1582RT/AD1583RT/ AD1584RT/AD1585RT Lead Temperature, Soldering Vapor Phase (60 sec) Infrared (15 sec) 1 Rating 12 V 400 mW −65°C to 150°C −40°C to +125°C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device.
PAGE 8
AD1582/AD1583/AD1584/AD1585 Data Sheet TERMINOLOGY Temperature Coefficient (TCVO) The change of output voltage over the operating temperature change and normalized by the output voltage at 25°C, expressed in ppm/°C. The equation follows TCVO [ppm/°C ] = VO (T2 ) − VO (T1 ) VO (25°C ) × (T2 − T1 ) Thermal Hysteresis (VO_HYS) The change of output voltage after the device is cycled through temperatures from +25°C to −40°C to +85°C and back to +25°C.
PAGE 9
Data Sheet AD1582/AD1583/AD1584/AD1585 TYPICAL PERFORMANCE CHARACTERISTICS 0.40 22 0.35 20 0.30 16 AD1585 0.25 14 mV/mA 12 10 0.20 AD1582 0.15 8 6 0.10 4 –50 –40 –30 –20 –10 0 ppm/°C 10 20 30 40 50 0 00701-003 0 –60 0 2 Figure 3. Typical Output Voltage Temperature Drift Distribution 6 VIN (V) 8 10 12 5 Figure 6. Load Regulation vs. VIN 50 0 45 –10 40 –20 35 –30 30 µV/V NUMBER OF PARTS 4 00701-006 0.
PAGE 10
AD1582/AD1583/AD1584/AD1585 Data Sheet THEORY OF OPERATION Rev. J | Page 10 of 16 VIN R4 R3 VOUT R5 VBG + VBE R2 – R1 R6 + V1 – GND Figure 9. Simplified Schematic 00701-009 The AD1582/AD1583/AD1584/AD1585 use the band gap concept to produce stable, low temperature coefficient voltage references suitable for high accuracy data acquisition components and systems.
PAGE 11
Data Sheet AD1582/AD1583/AD1584/AD1585 APPLICATIONS INFORMATION 2 2.498 2.496 2.494 2.492 –40 –20 0 20 40 60 TEMPERATURE (°C) 80 100 120 Figure 11. Output Voltage vs. Temperature VOLTAGE OUTPUT NONLINEARITY VS. TEMPERATURE When using a voltage reference with data converters, it is important to understand the impact that temperature drift can have on converter performance.
PAGE 12
AD1582/AD1583/AD1584/AD1585 Data Sheet OUTPUT VOLTAGE HYSTERESIS SUPPLY VOLTAGE High performance industrial equipment manufacturers can require the AD1582/AD1583/AD1584/AD1585 to maintain a consistent output voltage error at 25°C after the references are operated over the full temperature range. All references exhibit a characteristic known as output voltage hysteresis; however, the AD1582/AD1583/AD1584/AD1585 are designed to minimize this characteristic.
PAGE 13
Data Sheet AD1582/AD1583/AD1584/AD1585 100 100µV 90 80 10ms 100 90 70 60 50 AD1585 40 30 10 0% 00701-020 20 0 1 10 100 1k 10k FREQUENCY (Hz) 100k 1M 00701-018 10 Figure 18. Ripple Rejection vs. Frequency NOISE PERFORMANCE AND REDUCTION The noise generated by the AD1582/AD1583/AD1584/AD1585 is typically less than 70 µV p-p over the 0.1 Hz to 10 Hz frequency band. Figure 19 shows the 0.1 Hz to 10 Hz noise of a typical AD1582/AD1583/AD1584/AD1585.
PAGE 14
Data Sheet 20µs 100 100 90 90 10 0% Figure 22. Turn-On Characteristics 5V 20µs 100 90 90 10 0% 00701-023 10 0% 20µs 200mV 50µs Figure 24. Line Transient Response 100 1mV 50µs Figure 23. Turn-On Settling 5V 20µs 5mV 20µs 00701-025 20µs 1V 00701-022 10 0% 5V Figure 25. Load Transient Response (0 mA to 5 mA Load) DYNAMIC PERFORMANCE Many ADCs and DACs present transient current loads to the reference and poor reference response can degrade converter performance.
PAGE 15
Data Sheet AD1582/AD1583/AD1584/AD1585 OUTLINE DIMENSIONS 3.04 2.90 2.80 1.40 1.30 1.20 3 1 2 0.60 0.45 2.05 1.78 1.02 0.95 0.88 2.64 2.10 1.03 0.89 1.12 0.89 0.100 0.013 GAUGE PLANE 0.54 REF 0.180 0.085 0.25 0.60 MAX 0.30 MIN 011909-C 0.51 0.37 SEATING PLANE COMPLIANT TO JEDEC STANDARDS TO-236-AB Figure 27. 3-Lead Small Outline Transistor Package [SOT-23-3] (RT-3) Dimensions shown in millimeters 1.55 1.50 1.45 2.05 2.00 1.95 8.30 8.00 7.70 1.10 1.00 0.90 0.35 0.30 0.25 3.55 3.50 3.
PAGE 16
AD1582/AD1583/AD1584/AD1585 Data Sheet ORDERING GUIDE Model1 AD1582ART-REEL7 AD1582ARTZ-R2 AD1582ARTZ-REEL7 AD1582BRTZ-REEL7 AD1583ARTZ-R2 AD1583ARTZ-REEL7 AD1583BRTZ-REEL7 AD1584ARTZ-R2 AD1584ARTZ-REEL7 AD1584BRTZ-REEL7 AD1585ARTZ-R2 AD1585ARTZ-REEL7 AD1585BRTZ-REEL7 1 2 Output Voltage (V) 2.50 2.50 2.50 2.50 3.00 3.00 3.00 4.096 4.096 4.096 5.00 5.00 5.00 Accuracy (mV) 20 20 20 2 30 30 3 40 40 4 50 50 5 Initial Accuracy (%) 0.80 0.80 0.80 0.08 1.00 1.00 0.10 0.98 0.98 0.10 1.00 1.00 0.