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ADR430ARM-ADR431B-ADR433AR-ADR434B-ADR435AR
Ultralow Noise XFET Voltage References with Current Sink and Source Capability
Ultralow Noise XFET® Voltage References
with Current Sink and Source Capability
Rev. B
FEATURES
Low noise (0.1 Hz to 10 Hz): 3.5 µV p-p @ 2.5 V output
No external capacitor required
Low temperature coefficient
A Grade: 10 ppm/°C max
B Grade: 3 ppm/°C max
Load regulation: 15 ppm/mA
Line regulation: 20 ppm/V
Wide operating range
ADR430: 4.1 V to 18 V
ADR431: 4.5 V to 18 V
ADR433: 5.0 V to 18 V
ADR434: 6.1 V to 18 V
ADR435: 7.0 V to 18 V
ADR439: 6.5 V to 18 V
High output current: +30 mA/−20 mA
Wide temperature range: −40°C to +125°C
APPLICATIONS
Precision data acquisition systems
High resolution data converters
Medical instruments
Industrial process control systems
Optical control circuits
Precision instruments
PIN CONFIGURATIONS
NC = NO CONNECT
VIN
GND
VOUT
TRIM
04500-0-001 Figure 1. 8-Lead MSOP
(RM Suffix)
NC = NO CONNECT1
VIN23
GND4
VOUT
TRIM
04500-0-041 Figure 2. 8-Lead SOIC
(R Suffix)
GENERAL DESCRIPTION The ADR43x series is a family of XFET voltage references
featuring low noise, high accuracy, and low temperature drift
performance. Using ADI’s patented temperature drift curvature
correction and XFET (eXtra implanted junction FET) technology,
the ADR43x’s voltage change versus temperature nonlinearity is
minimized.
The XFET references operate at lower current (800 µA) and
supply headroom (2 V) than buried-Zener references. Buried-
Zener references require more than 5 V headroom for operations.
The ADR43x XFET references are the only low noise solutions
for 5 V systems.
The ADR43x series has the capability to source up to 30 mA
and sink up to 20 mA of output current. It also comes with a
TRIM terminal to adjust the output voltage over a 0.5% range
without compromising performance. The ADR43x is available
in the 8-lead mini SOIC and 8-lead SOIC packages.
All versions are specified over the extended industrial tempera-
ture range (−40°C to +125°C).
Table 1. Selection Guide
TABLE OF CONTENTS Specifications.....................................................................................3
ADR430 Electrical Characteristics.............................................3
ADR431 Electrical Characteristics.............................................4
ADR433 Electrical Characteristics.............................................5
ADR434 Electrical Characteristics.............................................6
ADR435 Electrical Characteristics.............................................7
ADR439 Electrical Characteristics.............................................8
Absolute Maximum Ratings............................................................9
Package Type.................................................................................9
ESD Caution..................................................................................9
Typical Performance Characteristics...........................................10
Theory of Operation......................................................................15
Basic Voltage Reference Connections......................................15
Noise Performance.....................................................................15
Turn-On Time............................................................................15
Applications.....................................................................................16
Output Adjustment....................................................................16
Reference for Converters in Optical Network Control
Circuits.........................................................................................16
Negative Precision Reference without Precision Resistors...16
High Voltage Floating Current Source....................................17
Kelvin Connections....................................................................17
Dual Polarity References...........................................................17
Programmable Current Source................................................18
Programmable DAC Reference Voltage..................................18
Precision Voltage Reference for Data Converters..................19
Precision Boosted Output Regulator.......................................19
Outline Dimensions.......................................................................20
Ordering Guide..........................................................................21
REVISION HISTORY
9/04—Data Sheet Changed from Rev. A to Rev. B Added New Grade..............................................................Universal
Changes to Specifications................................................................3
Replaced Figure 3, Figure 4, Figure 5...........................................10
Updated Ordering Guide...............................................................21
6/04—Data Sheet Changed from Rev. 0 to Rev. A Changes to Format.............................................................Universal
Changes to the Ordering Guide....................................................20
12/03—Revision 0: Initial Version
SPECIFICATIONS
ADR430 ELECTRICAL CHARACTERISTICS VIN = 4.1 V to 18 V, ILOAD = 0 mA, TA = 25°C, unless otherwise noted.
Table 2. 1 The long-term stability specification is noncumulative. The drift in subsequent 1,000 hour periods is significantly lower than in the first 1,000 hour period.
ADR431 ELECTRICAL CHARACTERISTICS VIN = 4.5 V to 18 V, ILOAD = 0 mA, TA = 25°C, unless otherwise noted.
Table 3. 1 The long-term stability specification is noncumulative. The drift in subsequent 1,000 hour periods is significantly lower than in the first 1,000 hour period.
ADR433 ELECTRICAL CHARACTERISTICS VIN = 5 V to 18 V, ILOAD = 0 mA , TA = 25°C, unless otherwise noted.
Table 4. The long-term stability specification is noncumulative. The drift in subsequent 1,000 hour periods is significantly lower than in the first 1,000 hour period.
ADR434 ELECTRICAL CHARACTERISTICS VIN = 6.1 V to 18 V, ILOAD = 0 mA, TA = 25°C, unless otherwise noted.
Table 5. The long-term stability specification is noncumulative. The drift in subsequent 1,000 hour periods is significantly lower than in the first 1,000 hour period.
ADR435 ELECTRICAL CHARACTERISTICS VIN = 7 V to 18 V, ILOAD = 0 mA, TA = 25°C, unless otherwise noted.
Table 6. The long-term stability specification is noncumulative. The drift in subsequent 1,000 hour periods is significantly lower than in the first 1,000 hour period.
ADR439 ELECTRICAL CHARACTERISTICS VIN = 6.5 V to 18 V, ILOAD = 0 mV, TA = 25°C, unless otherwise noted.
Table 7. The long-term stability specification is noncumulative. The drift in subsequent 1,000 hour periods is significantly lower than in the first 1,000 hour period.
ABSOLUTE MAXIMUM RATINGS @ 25°C, unless otherwise noted.
Table 8.
PACKAGE TYPE
Table 9. θJA is specified for worst-case conditions (device soldered in circuit board for
surface-mount packages).
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions beyond those indicated in the operational
sections of this specification is not implied. Absolute maximum
ratings apply individually only, not in combination.
ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
TYPICAL PERFORMANCE CHARACTERISTICS Default conditions: ±5 V, CL = 5 pF, G = 2, Rg = Rf = 1 kΩ, RL = 2 kΩ, VO = 2 V p-p, Frequency = 1 MHz, TA = 25°C.
OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
–40–25–10520355065809511012504500-0-015
Figure 3. ADR431 VOUT vs. Temperature
OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
–40–25–1052035506580951101254.0955
Figure 4. ADR434 VOUT vs. Temperature
OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
CURRE
NT (mA)
INPUT VOLTAGE (V)Figure 6. ADR435 Supply Current vs. Input Voltage
CURRE
NT (
TEMPERATURE (°C)
–40–25–10520355065809511012504500-0-019
Figure 7. ADR435 Supply Current vs. Temperature
CURRE
NT (mA)1268141618
CURRE
NT (
TEMPERATURE (°C)
–40–25–10520355065809511012504500-0-021
Figure 9. ADR431 Supply Current vs. Temperature
LOAD REGULATION (ppm/mA)
TEMPERATURE (°C)
–40–25–10520355065809511012504500-0-022
Figure 10. ADR431 Load Regulation vs. Temperature
LOAD REGULATION (ppm/mA)
TEMPERATURE (°C)
–40–25–10520355065809511012504500-0-023
Figure 11. ADR435 Load Regulation vs. Temperature
DIFFERENTIAL VOLTAGE (V)
LOAD CURRENT (mA)–100510Figure 12. ADR431 Minimum Input/Output
Differential Voltage vs. Load Current
MINIMUM HE
ADROOM (V
TEMPERATURE (°C)
–40–25–105203550658095110125Figure 13. ADR431 Minimum Headroom vs. Temperature
DIFFERENTIAL VOLTAGE (V)
LOAD CURRENT (mA)–100510Figure 14. ADR435 Minimum Input/Output
Differential Voltage vs. Load Current
MINIMUM HE
ADROOM (V
TEMPERATURE (°C)
–40–25–105203550658095110125Figure 15. ADR435 Minimum Headroom vs. Temperature
LINE REGULATION (ppm/V)
TEMPERATURE (°C)
–40–25–10520355065809511012504500-0-028
Figure 16. ADR435 Line Regulation vs. Temperature
Figure 17. ADR431 Turn-On Response
Figure 18. ADR431 Turn-On Response, 0.01 µF Load Capacitor
Figure 19. ADR431 Turn-Off Response
Figure 20. ADR431 Line Transient Response—No Capacitors
