Datasheet

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General Description

The MAX6143 is a low-noise, high-precision voltage ref-

erence. The device features a proprietary temperature-

coefficient curvature-correction circuit and

laser-trimmed thin-film resistors that result in a very low

3ppm/°C temperature coefficient and excellent ±0.06%

initial accuracy. The MAX6143 provides a TEMP output

where the output voltage is proportional to die tempera-

ture, making the device suitable for a wide variety of

temperature-sensing applications. The device also pro-

vides a TRIM input, allowing fine trimming of the output

voltage with a resistive-divider network. Low tempera-

ture drift and low noise make the MAX6143 ideal for use

with high-resolution A/D or D/A converters.

The MAX6143 provides accurate preset +2.5V, +3.3V,

+4.096V, +5.0V, and +10V reference voltages and

accepts input voltages up to +40V. The device draws

340µA of supply current and sources 30mA or sinks 2mA

of load current. The active-low shutdown feature (SHDN)

reduces supply current to 0.01µA. The MAX6143 uses

bandgap technology for low-noise performance and

excellent accuracy. The MAX6143 does not require an

output bypass capacitor for stability, and is stable with

capacitive loads up to 100µF. Eliminating the output

bypass capacitor saves valuable board area in space-

critical applications.

The MAX6143 is available in an 8-pin SO package and

operates over the automotive (-40°C to +125°C) tem-

perature range.

Applications

A/D Converters Voltage Regulators

D/A Converters Threshold Detectors

Digital Voltmeters

Features

♦ Wide (V

OUT

+ 2V) to +40V Supply Voltage Range

♦ Excellent Temperature Stability: 3ppm/°C (max)

♦ Tight Initial Accuracy: 0.05% (max)

♦ Low Noise: 3.8µV

P-P

(typ at 2.5V Output)

♦ Sources up to 30mA Output Current

♦ Low Supply Current: 450µA (max at +25°C)

♦ Low 0.01µA Shutdown Current

♦ Linear Temperature Transducer Voltage Output

♦ +2.5V, +3.3V, +4.096V, +5.0V, or +10V Output

Voltages

♦ Wide Operating Temperature Range: -40°C to

+125°C

♦ No External Capacitors Required for Stability

MAX6143

High-Precision Voltage Reference with

Temperature Sensor

________________________________________________________________ Maxim Integrated Products 1

19-3168; Rev 1; 4/04

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Pin Configuration appears at end of data sheet.

Ordering Information/Selector Guide

PART TEMP RANGE

PIN-

PACKAGE

OUTPUT

VOLTAGE (V)

TEMPERATURE COEFFICIENT

(ppm/°C) 40°C TO +125°C

INITIAL

ACCURACY (%)

MAX6143AASA25

-40°C to +125°C

8 SO 2.500 3 0.06

MAX6143BASA25

-40°C to +125°C

8 SO 2.500 10 0.10

MAX6143AASA33

-40°C to +125°C

8 SO 3.300 3 0.06

MAX6143BASA33

-40°C to +125°C

8 SO 3.300 10 0.10

MAX6143AASA41

-40°C to +125°C

8 SO 4.096 3 0.06

MAX6143BASA41

-40°C to +125°C

8 SO 4.096 10 0.10

MAX6143AASA50

-40°C to +125°C

8 SO 5.000 3 0.06

MAX6143BASA50

-40°C to +125°C

8 SO 5.000 10 0.10

MAX6143AASA10

-40°C to +125°C

8 SO 10.000 3 0.05

MAX6143BASA10

-40°C to +125°C

8 SO 10.000 10 0.10

OUT

GND

*OPTIONAL.

( V

OUT

+ 2V) TO 40V INPUT

REFERENCE

OUTPUT

SHDN

TRIM

TEMP

MAX6143

Typical Operating Circuit

Summary of content (16 pages)

PAGE 1
9-3168; Rev 1; 4/04 High-Precision Voltage Reference with Temperature Sensor Features ♦ Wide (VOUT + 2V) to +40V Supply Voltage Range ♦ Excellent Temperature Stability: 3ppm/°C (max) ♦ Tight Initial Accuracy: 0.05% (max) ♦ Low Noise: 3.8µVP-P (typ at 2.5V Output) ♦ Sources up to 30mA Output Current ♦ Low Supply Current: 450µA (max at +25°C) ♦ Low 0.01µA Shutdown Current ♦ Linear Temperature Transducer Voltage Output ♦ +2.5V, +3.3V, +4.096V, +5.
PAGE 2
MAX6143 High-Precision Voltage Reference with Temperature Sensor ABSOLUTE MAXIMUM RATINGS IN to GND ...............................................................-0.3V to +42V OUT, SHDN, TRIM, TEMP to GND...............-0.3V to (VIN + 0.3V) Output Short Circuit to GND .....................................................5s Continuous Power Dissipation (TA = +70°C) 8-Pin SO (derate 5.9mW/°C above +70°C) ..................471mW Operating Temperature Range ........................
PAGE 3
High-Precision Voltage Reference with Temperature Sensor MAX6143 ELECTRICAL CHARACTERISTICS—MAX6143_25 (VOUT = 2.5V) (continued) (VIN = V SHDN = +5V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SHUTDOWN (SHDN) Logic-High Input Voltage VIH Logic-Low Input Voltage VIL 2.0 0.
PAGE 4
MAX6143 High-Precision Voltage Reference with Temperature Sensor ELECTRICAL CHARACTERISTICS—MAX6143_33 (VOUT = 3.3V) (continued) (VIN = V SHDN = +10V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 40.0 V INPUT Supply Voltage Range VIN Guaranteed by line regulation test Quiescent Supply Current IIN No load, normal operation Shutdown Supply Current ISHDN 5.
PAGE 5
High-Precision Voltage Reference with Temperature Sensor (VIN = V SHDN = +10V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC Noise Voltage eOUT Turn-On Settling Time tR f = 0.1Hz to 10Hz 7 µVP-P f = 10Hz to 1kHz 11.5 µVRMS To VOUT = 0.
PAGE 6
MAX6143 High-Precision Voltage Reference with Temperature Sensor ELECTRICAL CHARACTERISTICS—MAX6143_50 (VOUT = 5.0V) (continued) (VIN = V SHDN = +15V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 7
High-Precision Voltage Reference with Temperature Sensor (VIN = V SHDN = +15V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Load Regulation (Note 3) Output Short-Circuit Current SYMBOL ∆VOUT/ ∆IOUT ISC Temperature Hysteresis (Note 4) ∆VOUT/ cycle Long-Term Stability ∆VOUT/ time CONDITIONS Sourcing: 0 ≤ IOUT ≤ 10mA Sinking: -0.
PAGE 8
Typical Operating Characteristics (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.) 10.001 OUTPUT VOLTAGE (V) 2.499 9.998 9.997 9.996 9.995 9.994 THREE TYPICAL PARTS 2.498 -25 0 25 50 75 100 125 -50 0 -0.25 TA = +125°C -25 0 25 50 75 100 -0.50 125 0 5 10 15 20 25 TEMPERATURE (°C) SOURCE CURRENT (mA) LOAD REGULATION vs. SOURCE CURRENT (VOUT = 10V) LOAD REGULATION vs. SINK CURRENT (VOUT = 2.5V) LOAD REGULATION vs.
PAGE 9
High-Precision Voltage Reference with Temperature Sensor MAX6143 Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 2.5V) -20 -40 PSRR (dB) TA = +125°C 1.5 -20 TA = +25°C -40 PSRR (dB) DROPOUT VOLTAGE (V) 2.0 0 MAX6143toc11 0 MAX6143toc10 2.5 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 10V) -60 -80 -60 -80 -100 TA = -40°C 1.
PAGE 10
Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.) 800 1 0.1 TEMP VOLTAGE (mV) 700 TEMP VOLTAGE (mV) 10 900 MAX6143toc20 MAX6143toc19 800 TEMP VOLTAGE vs. TEMPERATURE (VOUT = 10V) 600 500 0.01 400 -25 0 25 50 75 100 125 400 -50 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 100 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) OUTPUT VOLTAGE vs. TRIM VOLTAGE (VOUT = 2.
PAGE 11
High-Precision Voltage Reference with Temperature Sensor LOAD TRANSIENT (VOUT = 2.5V, COUT = 0, 0 TO 20mA) 0.1Hz TO 10Hz OUTPUT NOISE LOAD TRANSIENT (VOUT = 10V, COUT = 0, 0 TO 20mA) MAX6413toc29 MAX6143toc28 MAX6413toc30 20mA IOUT 20mA IOUT 0 0 4µV/div VOUT AC-COUPLED 1V/div 10µs/div 1s/div LOAD TRANSIENT (VOUT = 2.5V, COUT = 1µF, 0 TO +20mA) 10µs/div LOAD TRANSIENT (VOUT = 10V, COUT = 1µF, 0 TO 20mA) MAX6413toc31 VOUT AC-COUPLED 1V/div LOAD TRANSIENT (VOUT = 2.
PAGE 12
MAX6143 High-Precision Voltage Reference with Temperature Sensor Typical Operating Characteristics (continued) (VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.) LINE TRANSIENT (VOUT = 2.5V) TURN-ON TRANSIENT (VOUT = 2.5V, COUT = 0) LINE TRANSIENT (VOUT = 10V) MAX6413toc37 MAX6413toc38 5.5V MAX6413toc39 15.5V VIN 1V/div 14.5V VIN 4.
PAGE 13
High-Precision Voltage Reference with Temperature Sensor SHUTDOWN TRANSIENT (VOUT = 10V, VIN = 15V, COUT = 0) SHUTDOWN TRANSIENT (VOUT = 10V, VIN = 15V, COUT = 1µF) MAX6413toc45 MAX6143toc46 VSHDN 5V/div VSHDN 5V/div GND GND VOUT 5V/div VOUT 5V/div GND GND 100µs/div 100µs/div Pin Description PIN NAME FUNCTION 1, 8 I.C. Internally Connected. Do not connect externally. 2 IN Positive Power-Supply Input 3 TEMP Temperature Proportional Output Voltage.
PAGE 14
MAX6143 High-Precision Voltage Reference with Temperature Sensor Temp Output Supply Current The MAX6143 provides a temperature output proportional to die temperature. TEMP can be calculated from the following formula: TEMP (V) = TJ (°K) x n where TJ = the die temperature, n = the temperature multiplier, The MAX6143 consumes 340µA of quiescent supply current. This improved efficiency reduces power dissipation and extends battery life. n = VTEMP (at TJ = T0 ) ≅ 1.
PAGE 15
High-Precision Voltage Reference with Temperature Sensor In a data converter application, the reference voltage of the converter must stay within a certain limit to keep the error in the data converter smaller than the resolution limit through the operating temperature range.
PAGE 16
Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) DIM A A1 B C e E H L N E H INCHES MILLIMETERS MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050 MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .EPS MAX6143 High-Precision Voltage Reference with Temperature Sensor 1.