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MAX6070/MAX6071

Low-Noise, High-Precision Series

Voltage References

Typical Operating Circuits

19-6355; Rev 3; 2/14

For related parts and recommended products to use with this part,

refer to www.maximintegrated.com/MAX6070.related.

Ordering Information and Selector Guide appears at end of

data sheet.

General Description

The MAX6070/MAX6071 offer a very low noise and

low-drift voltage reference in a small 6-pin SOT23 pack-

age. These devices provide a 1/f noise voltage of only

4.8µV

P-P

at an output voltage of 2.5V, with a temperature

drift of 6ppm/NC (max). The devices operate with an input

voltage from 2.8V to 5.5V. The MAX6070/MAX6071 con-

sume 150FA of supply current and can sink and source

up to 10mA of load current. The MAX6070/MAX6071 pro-

vide an initial accuracy of 0.04%. The low-drift and low-

noise specifications enable enhanced system accuracy,

making these devices ideal for high precision industrial

applications. The MAX6070 offers a noise filter option for

wideband applications.

The MAX6070/MAX6071 provide output voltages of

1.25V, 1.8V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V, and 5.0V.

The devices are available in a 6-pin SOT23 package and

specified over the extended industrial temperature range

of -40NC to +125NC.

Applications

High-Accuracy Industrial and Process Control

Precision Instrumentation

High-Resolution ADCs and DACs

Precision Current Sources

Benefits and Features

S High Q0.04% Initial Accuracy

Low 1.5ppm/°C (typ), 6ppm/°C (max) Temperature

Drift

S Low 4.8µV

P-P

Noise (0.1Hz to 10Hz) at 2.5V

Low 150µA Supply Current

10mA Source/Sink Load Current

Noise Filter Option

Low 200mV Dropout Voltage

High 85dB Ripple Rejection

Small 6-Pin SOT23 Package

Voltage Output Options: 1.25V, 1.8V, 2.048V, 2.5V,

3.0V, 3.3V, 4.096V, and 5.0V

BANDGAP

VOLTAGE

REFERENCE

GND

0.1µF

FILTER

SHUTDOWN

CONTROL

OUTF

OUTS

OUT

BANDGAP

VOLTAGE

REFERENCE

GNDFGNDS

0.1µF

SHUTDOWN

CONTROL

OUTF

OUTS

OUT

MAX6070 MAX6071

For pricing, delivery, and ordering information, please contact Maxim Direct

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

Summary of content (23 pages)

PAGE 1
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References General Description The MAX6070/MAX6071 offer a very low noise and low-drift voltage reference in a small 6-pin SOT23 package. These devices provide a 1/f noise voltage of only 4.8µVP-P at an output voltage of 2.5V, with a temperature drift of 6ppm/NC (max). The devices operate with an input voltage from 2.8V to 5.5V. The MAX6070/MAX6071 consume 150FA of supply current and can sink and source up to 10mA of load current.
PAGE 2
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References ABSOLUTE MAXIMUM RATINGS Continuous Power Dissipation (TA = +70NC) SOT23 (derate 4.3mW/NC above +70NC)................. 347.8mW Operating Temperature Range......................... -40NC to +125NC Junction Temperature......................................................+150NC Storage Temperature Range............................. -65NC to +150NC Soldering Temperature (reflow).......................................
PAGE 3
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References ELECTRICAL CHARACTERISTICS—MAX607__AUT12 (VOUT = 1.250V) (continued) (VIN = +5.0V, IOUT = 0mA, COUT = 0.1FF, TA = -40NC to +125NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2) PARAMETER Turn-On Settling Time Enable Settling Time SYMBOL tR tEN Capacitive-Load Stability Range CONDITIONS Settling to 0.01%, COUT = 0.1FF Settling to 0.01%, COUT = 0.1FF MIN TYP MAX UNITS MAX6070, CFILTER = 0.
PAGE 4
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References ELECTRICAL CHARACTERISTICS—MAX607__AUT18 (VOUT = 1.800V) (VIN = +5.0V, IOUT = 0mA, COUT = 0.1µF, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC CHARACTERISTICS Noise Voltage eOUT Ripple Rejection Turn-On Settling Time Enable Settling Time tR tEN Capacitive-Load Stability Range 1/f noise, 0.1Hz to 10Hz, COUT = 0.
PAGE 5
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References ELECTRICAL CHARACTERISTICS—MAX607__AUT21 (VOUT = 2.048V) (continued) (VIN = +5.0V, IOUT = 0mA, COUT = 0.1µF, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 6
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References ELECTRICAL CHARACTERISTICS—MAX607__AUT25 (VOUT = 2.500V) (VIN = +5.0V, IOUT = 0mA, COUT = 0.1FF, TA = -40NC to +125NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS OUTPUT Output Voltage Accuracy Output Voltage Temperature Drift (Note 3) TCVOUT -0.04 +0.04 MAX6070B/MAX6071B, TA = +25°C MAX6070A/MAX6071A -0.08 +0.
PAGE 7
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References ELECTRICAL CHARACTERISTICS—MAX607__AUT25 (VOUT = 2.500V) (continued) (VIN = +5.0V, IOUT = 0mA, COUT = 0.1FF, TA = -40NC to +125NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 5.5 V INPUT Supply Voltage VIN Quiescent Supply Current IIN Shutdown Supply Current ISD Guaranteed by line regulation 2.8 150 TA = +25°C TA = TMIN to TMAX 235 300 0.
PAGE 8
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References ELECTRICAL CHARACTERISTICS—MAX607__AUT30 (VOUT = 3.000V) (continued) (VIN = +5.0V, IOUT = 0mA, COUT = 0.1µF, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER Turn-On Settling Time Enable Settling Time SYMBOL tR tEN Capacitive-Load Stability Range CONDITIONS Settling to 0.01%, COUT = 0.1µF Settling to 0.01%, COUT = 0.1µF MIN TYP MAX UNITS MAX6070, CFILTER = 0.1µF 9.
PAGE 9
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References ELECTRICAL CHARACTERISTICS—MAX607__ AUT33 (VOUT = 3.300V) (continued) (VIN = +5.0V, IOUT = 0mA, COUT = 0.1µF, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC CHARACTERISTICS Noise Voltage eOUT Ripple Rejection Turn-On Settling Time Enable Settling Time tR tEN Capacitive-Load Stability Range 1/f noise, 0.1Hz to 10Hz, COUT = 0.
PAGE 10
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References ELECTRICAL CHARACTERISTICS—MAX607__AUT41 (VOUT = 4.096V) (continued) (VIN = +5.0V, IOUT = 0mA, COUT = 0.1FF, TA = -40NC to +125NC, unless otherwise noted. Typical values are at TA = +25NC.
PAGE 11
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References ELECTRICAL CHARACTERISTICS—MAX607__AUT50 (VOUT = 5.000V) (VIN = +5.5V, IOUT = 0mA, COUT = 0.1FF, TA = -40NC to +125NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS OUTPUT Output Voltage Accuracy Output Voltage Temperature Drift (Note 3) TCVOUT Load Regulation Dropout Voltage Short-Circuit Current -0.04 +0.04 MAX6070B/MAX6071B, TA = +25°C MAX6070A/MAX6071A -0.
PAGE 12
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References ELECTRICAL CHARACTERISTICS—MAX607__AUT50 (VOUT = 5.000V) (continued) (VIN = +5.5V, IOUT = 0mA, COUT = 0.1FF, TA = -40NC to +125NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 5.5 V 160 250 INPUT Supply Voltage VIN Quiescent Supply Current IIN Shutdown Supply Current ISD Guaranteed by line regulation 5.
PAGE 13
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) 1.2500 1.2497 4.0975 2.5005 4.0970 OUTPUT VOLTAGE (V) 1.2502 MAX6071_41 OUTPUT VOLTAGE TEMPERATURE DRIFT MAX6070 toc01b MAX6070 toc01a 2.5010 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 1.2505 MAX6071_25 OUTPUT VOLTAGE TEMPERATURE DRIFT 2.5000 MAX6070 toc01c MAX6071_12 OUTPUT VOLTAGE TEMPERATURE DRIFT 4.0965 4.0960 4.0955 2.4995 4.0950 1.2495 2.
PAGE 14
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) 80 80 70 60 60 PSRR (dB) 50 40 160 40 140 120 100 80 60 20 20 40 10 10 20 0 0 100 1k 10k 100k 0 10 100 1k 10k 3.4 2.7 100k 4.1 4.8 FREQUENCY (Hz) FREQUENCY (Hz) INPUT VOLTAGE (V) MAX6071_25 SUPPLY CURRENT vs. INPUT VOLTAGE MAX6071_41 SUPPLY CURRENT vs. INPUT VOLTAGE MAX6071_12 ROUT vs. FREQUENCY 140 120 100 80 60 0.7 0.
PAGE 15
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) SUPPLY CURRENT (µA) 150 VIN = 2.8V 100 VOUT = 1.25V 2µV/div 150 VIN = 4.3V 100 50 50 0 -25 0 25 50 75 100 -50 125 -25 0 25 50 75 100 TEMPERATURE (°C) TEMPERATURE (°C) MAX6070_25 OUTPUT NOISE (0.1Hz TO 10Hz) MAX6070_41 OUTPUT NOISE (0.1Hz TO 10Hz) MAX6070 toc09b 1s/div 125 MAX6070_12 OUTPUT NOISE DENSITY vs.
PAGE 16
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) MAX6070_12 TURN-ON TRANSIENT (CFILTER = 0µF) MAX6070_25 TURN-ON TRANSIENT (CFILTER = 0µF) MAX6070 toc11a VIN = 0V MAX6070 toc11b VIN = 5V 0.01% SETTLING TIME = 21µs VIN = 5V VOUT = 1.25V VIN 0V 0.01% SETTLING TIME = 33µs VOUT = 2.
PAGE 17
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) MAX6071_12 ±10mA LOAD TRANSIENT (COUT = 0.1µF) MAX6071_25 ±10mA LOAD TRANSIENT (COUT = 0.1µF) MAX6070 toc13a MAX6070 toc13b VOUT VOUT = 1.25V SINK 10mA SOURCE 10mA VOUT = 2.5V SINK 10mA IOUT SOURCE 10mA VOUT IOUT VOUT = 0V VOUT = 0V 10µs/div 10µs/div MAX6071_41 ±10mA LOAD TRANSIENT (COUT = 0.1µF) MAX6070_12 LINE TRANSIENT (COUT = 0.
PAGE 18
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) MAX6070_12 ENABLE TRANSIENT (CFILTER = 0µF) MAX6070_12 ENABLE TRANSIENT (CFILTER = 0.1µF) MAX6070 toc15 VIN = 0V 0.01% SETTLING TIME = 63µs VIN = 5V VOUT = 1.25V MAX6070 toc16 VIN = 0V VIN = 5V 0.01% SETTLING TIME = 6.1ms VOUT = 1.
PAGE 19
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References Pin Configurations TOP VIEW + FILTER 1 GND 2 EN 3 + MAX6070 6 OUTF GNDF 1 5 OUTS GNDS 2 4 IN EN 3 SOT23 MAX6071 6 OUTF 5 OUTS 4 IN SOT23 Pin Description PIN NAME FUNCTION MAX6070 MAX6071 1 — FILTER Filter Input. Connect a 0.1µF capacitor from FILTER to ground to provide high-frequency bypass. Leave unconnected, if not used.
PAGE 20
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References Detailed Description Wideband Noise Reduction (FILTER) To improve wideband noise and transient power-supply noise with the MAX6070, connect a 0.1FF capacitor from FILTER to GND (see the Typical Operating Characteristics). Larger values do not appreciably improve noise reduction. A 0.1FF capacitor reduces the spectral noise density at 1kHz from 60nV/√Hz to 30nV/√Hz for the 2.5V output.
PAGE 21
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References 5V SUPPLY 5V SUPPLY IN ISOURCE 0.1µF IN OUTF EN MAX6071 0.1µF REF VDD MAX541 DAC OUTS MAX6071 OUTF LOAD OUT OUTS GND GNDS 0.1µF GND GND GNDS R VOUT(NOMINAL) / R = ISOURCE Figure 2. Reference Ground Kelvin Connection Figure 3. Precision Current Source Selector Guide PART FILTER VOUT (V) ACCURACY (%) TOP MARK Yes 1.25 0.04 +ACPF MAX6070AAUT12+T MAX6070AAUT18+T Yes 1.8 0.04 +ACPH MAX6070AAUT21+T Yes 2.
PAGE 22
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References Selector Guide (continued) PART FILTER VOUT (V) ACCURACY (%) TOP MARK MAX6071AAUT30+T No 3.0 0.04 +ACQF MAX6071AAUT33+T No 3.3 0.04 +ACQH MAX6071AAUT41+T No 4.096 0.04 +ACQJ MAX6071AAUT50+T No 5.0 0.04 +ACQN MAX6071BAUT12+T No 1.25 0.08 +ACPY MAX6071BAUT18+T No 1.8 0.08 +ACQA MAX6071BAUT21+T No 2.048 0.08 +ACQC MAX6071BAUT25+T No 2.5 0.08 +ACQE MAX6071BAUT30+T No 3.0 0.
PAGE 23
MAX6070/MAX6071 Low-Noise, High-Precision Series Voltage References Revision History REVISION NUMBER REVISION DATE 0 10/12 Initial release 1 1/13 Added 2.048V, 3.0V, and 5.0V options to data sheet. Revised General Description, Benefits and Features, Absolute Maximum Ratings, Electrical Characteristics, and Selector Guide. 1–9, 17, 18 2 3/13 Added 1.8V and 3.3V options to data sheet. Revised General Description, Benefits and Features, Electrical Characteristics, and Selector Guide.