Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - voltage reference Series Adjustable SOIC 8 N

General Description

The MAX6220 is a low-noise, precision voltage refer-

ence with extremely low 20ppm/°C temperature coeffi-

cient over the automotive temperature range (-40°C to

+125°C) and excellent ±0.1% initial accuracy. This

device features buried-zener technology for low noise

performance. The load-regulation specification is guar-

anteed for source and sink currents up to 15mA.

Excellent line and load regulation and low output

impedance at high frequency make the MAX6220 ideal

for high-resolution data-conversion systems up to

16 bits. The MAX6220 is set for 2.5V, 4.096V, and

5.0V outputs.

Applications

High-Accuracy Industrial and Process Control

ATE Equipment

Precision Current Sources

Features

♦ Low 20ppm/°C Temperature Coefficient over

-40°C to +125°C Range

♦ Very Low 1.5µVp-p Noise (0.1Hz to 10Hz)

♦ ±0.1% Initial Accuracy

♦ ±15mA Output Source and Sink Current

♦ 8V to 40V Input Voltage Range

♦ Optional Noise Reduction and Voltage Trim

♦ Excellent Transient Response

♦ Low 20ppm/1000hr Long-Term Stability

♦ Stable for All Capacitive Loads

MAX6220

Low-Noise, Precision, +2.5V/+4.096V/+5V

Voltage Reference

________________________________________________________________ Maxim Integrated Products 1

REFERENCE OUT

GND

*OPTIONAL (STABLE WITH ALL CAPACITIVE LOADS)

TRIM

OUT

8V TO 40V INPUT

2.2µF

MAX6220

Typical Operating Circuit

OUT

TRIM

GND

I.C.

SOIC

TOP VIEW

MAX6220

Pin Configuration

19-1930; Rev 0; 4/01

PART

TEMP. RANGE

PIN-

PACKAGE

OUPUT

VOLTAGE

(V)

MAX6220ASA25

-40°C to +125°C

8 SO 2.5

MAX6220ASA41

-40°C to +125°C

8 SO 4.096

MAX6220ASA50

-40°C to +125°C

8 SO 5.0

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.

Ordering Information

Summary of content (10 pages)

PAGE 1
9-1930; Rev 0; 4/01 Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage Reference The MAX6220 is a low-noise, precision voltage reference with extremely low 20ppm/°C temperature coefficient over the automotive temperature range (-40°C to +125°C) and excellent ±0.1% initial accuracy. This device features buried-zener technology for low noise performance. The load-regulation specification is guaranteed for source and sink currents up to 15mA.
PAGE 2
MAX6220 Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage Reference ABSOLUTE MAXIMUM RATINGS (Voltages Referenced to GND) IN..............................................................................-0.3V to +42V OUT, TRIM ...............................................................-0.3V to +12V NR ..............................................................................-0.3V to +6V OUT Short-Circuit to GND Duration (VIN ≤ 12V)..........Continuous OUT Short-Circuit to GND Duration (VIN ≤ 42V) ....
PAGE 3
Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage Reference MAX6220 ELECTRICAL CHARACTERISTICS—(+4.096V) (VIN = +10V, IOUT = 0mA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 4
MAX6220 Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage Reference ELECTRICAL CHARACTERISTICS—(+5.0V) (VIN = +10V, IOUT = 0mA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER Input Voltage Range Output Voltage SYMBOL TCVOUT Line Regulation (Note 2) ∆VOUT/ ∆VIN Load Regulation (Note 2) ∆VOUT/ ∆IOUT Trim-Adjustment Range Turn-On Settling Time Output Noise Voltage (Note 3) Note 1: Note 2: Note 3: Note 4: 4 MIN +25°C 4.
PAGE 5
Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage Reference 0.5 100 0 0 -0.5 -100 -1.0 -200 0.5 125 0 0 -0.5 -1.5 -55 -35 -15 5 25 45 65 -1.0 -55 -35 -15 -300 85 105 125 5 25 45 200 0.4 160 0.3 120 0.2 80 0.1 40 0 -0.1 -40 -0.2 -80 -0.3 -120 -0.4 -55 -35 -15 -250 85 105 125 65 240 0.5 0 -125 5 25 45 -160 85 105 125 65 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) MAX6220_50 CHANGE IN OUTPUT VOLTAGE vs.
PAGE 6
Typical Operating Characteristics (continued) (VIN = +10V, IOUT = 0mA, TA = +25°C, unless otherwise noted.) 30 25 20 CNR = 1µF 15 10 70 CNR = 0µF 60 50 40 30 CNR = 1µF 20 10 100 1k 100 1k 30 CNR = 1µF 20 10 10k 100 MAX6220_50 0.1Hz TO 10Hz NOISE MAX6220 toc15 VOUT, 1µV/div VOUT, 0.5µV/div VOUT, 1µV/div 1s/div 1s/div RIPPLE REJECTION vs.
PAGE 7
Low-Noise, Precision, +2.5V/+4.
PAGE 8
MAX6220 Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage Reference _____________________Pin Description PIN NAME 1, 7, 8 I.C. Internally Connected. Do not use. 2 IN Positive Power-Supply Input NR Noise Reduction. Optional capacitor connection for wideband noise reduction. Leave open if not used (Figure 2). 3 FUNCTION 4 GND Ground 5 TRIM External Trim Input. Allows ±1% output adjustment (Figure 1). Leave open if not used.
PAGE 9
Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage Reference MAX6220 +5V INPUT 3.3µF C1+ VCC V+ IN C1- +REFERENCE OUT OUT R2 100kΩ MAX865 3.3µF C1 2.2µF C2+ C2- GND MAX6220 V- NR TRIM GND C2 1µF 2.2µF R1 10kΩ C3 2.2µF R3 1kΩ MAX480 R4 100kΩ -REFERENCE OUT Figure 3.
PAGE 10
________________________________________________________Package Information SOICN.EPS MAX6220 Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage Reference Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.