Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - voltage reference Series, Buried zener Adjustable SOIC 8

AVAILABLE

Functional Diagrams

Pin Configurations appear at end of data sheet.

Functional Diagrams continued at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

For pricing, delivery, and

ordering information, please contact Maxim Direct

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

General Description

The MAX6325/MAX6341/MAX6350 are low-noise, preci-

sion voltage references with extremely low, 0.5ppm/°C

typical temperature coefficients and excellent, ±0.02%

initial accuracy. These devices feature buried-zener

technology for lowest noise performance. Load-regula-

tion specifications are guaranteed for source and sink

currents up to 15mA. Excellent line and load regulation

and low output impedance at high frequencies make

them ideal for high-resolution data-conversion systems

up to 16 bits.

The MAX6325 is set for a 2.5V output, the MAX6341 is

set for a 4.096V output, and the MAX6350 is set for a

5V output. All three provide for the option of external

trimming and noise reduction.

________________________Applications

High-Resolution Analog-to-Digital

and Digital-to-Analog Converters

High-Accuracy Reference Standard

High-Accuracy Industrial and Process Control

Digital Voltmeters

ATE Equipment

Precision Current Sources

____________________________Features

♦ Ultra Low, 1ppm/°C Max Tempco

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

(MAX6325)

♦ ±0.02% Initial Accuracy (MAX6350)

♦ ±15mA Output Source and Sink Current

♦ Low, 18mW Power Consumption (MAX6325)

♦ Industry-Standard Pinout

♦ Optional Noise Reduction and Voltage Trim

♦ Excellent Transient Response

♦ 8-Pin SO Package Available

♦ Low, 30ppm/1000hr Long-Term Stability

♦ Stable for All Capacitive Loads

1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V

Voltage References

REFERENCE OUT

GND

*OPTIONAL

TRIM

OUT

8V TO 36V INPUT

2.2µF

MAX6325

MAX6341

MAX6350

Typical Operating Circuit

OUT

TRIM

GND

I.C.

MAX6325

MAX6341

MAX6350

DIP/SO

TOP VIEW

I.C. = INTERNALLY CONNECTED; DO NOT USE

Pin Configuration

19-1203; Rev 1; 1/01

Ordering Information

Ordering Information continued at end of data sheet.

MAX6325CPA

MAX6325CSA 0°C to +70°C

0°C to +70°C 1.0

1.0

8 Plastic DIP

8 SO

MAX6325EPA -40°C to +85°C 1.58 Plastic DIP

PART TEMP. RANGE

MAX

TEMPCO

(ppm/

°C)

PIN-

PACKAGE

MAX6325ESA -40°C to +85°C 1.58 SO

MAX6325MJA -55°C to +125°C 2.58 CERDIP

Pin Configuration

19-1203; Rev 1; 1/01

Pin Configuration

MAX6325/MAX6341/MAX6350

Summary of content (11 pages)

PAGE 1
MAX6325/MAX6341/MAX6350 LE AVAILAB 1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V Voltage References General Description The MAX6325/MAX6341/MAX6350 are low-noise, precision voltage references with extremely low, 0.5ppm/°C typical temperature coefficients and excellent, ±0.02% initial accuracy. These devices feature buried-zener technology for lowest noise performance. Load-regulation specifications are guaranteed for source and sink currents up to 15mA.
PAGE 2
MAX6325/MAX6341/MAX6350 1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V Voltage References ABSOLUTE MAXIMUM RATINGS (Voltages Referenced to GND) IN ................................................................................-0.3V to 40V OUT, TRIM..................................................................-0.3V to 12V NR.................................................................................-0.3V to 6V OUT Short-Circuit to GND Duration (VIN ≤ 12V)..........
PAGE 3
MAX6325/MAX6341/MAX6350 1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V Voltage References ELECTRICAL CHARACTERISTICS—MAX6341 (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 CONDITIONS TYP MAX UNITS 36 V 4.096 4.097 V C 0.5 1.0 MAX6341E_A E 0.75 1.5 MAX6341MJA M 1.0 2.
PAGE 4
MAX6325/MAX6341/MAX6350 1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V Voltage References ELECTRICAL CHARACTERISTICS—MAX6350 (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 CONDITIONS VIN VOUT MAX6350 TCVOUT Turn-On Settling Time Output Noise Voltage (Note 3) E 0.75 1.5 M 1.0 2.
PAGE 5
MAX6325/MAX6341/MAX6350 1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V Voltage References __________________________________________Typical Operating Characteristics (VIN = +10V, IOUT = 0mA, TA = +25°C, unless otherwise noted.) MAX6341 NORMALIZED OUTPUT VOLTAGE vs. TEMPERATURE 200 0.5 100 0 0 250 -0.5 -100 -1.0 -200 0.5 125 0 0 -0.5 -1.5 -55 -35 -15 5 25 45 5 200 0.4 160 0.3 120 0.2 80 0.1 40 0 0 -0.1 -40 -0.2 -80 -0.3 -120 -0.
PAGE 6
MAX6325/MAX6341/MAX6350 1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V Voltage References ____________________________Typical Operating Characteristics (continued) (VIN = +10V, IOUT = 0mA, TA = +25°C, unless otherwise noted.) MAX6341 OUTPUT NOISE-VOLTAGE DENSITY vs. FREQUENCY CNR = 0µF 35 30 25 20 CNR = 1µF 15 10 5 70 CNR = 0µF 60 50 40 30 CNR = 1µF 20 10 10 100 1k 100 1k CNR = 0µF 70 60 50 40 30 CNR = 1µF 20 10 10k 10 100 1k 10k FREQUENCY (Hz) FREQUENCY (Hz) RIPPLE REJECTION vs.
PAGE 7
MAX6325/MAX6341/MAX6350 1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V Voltage References ____________________________Typical Operating Characteristics (continued) (VIN = +10V, IOUT = 0mA, TA = +25°C, unless otherwise noted.
PAGE 8
MAX6325/MAX6341/MAX6350 1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V Voltage References _____________________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
MAX6325/MAX6341/MAX6350 1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V Voltage References +5V INPUT 3.3µF C1+ VCC V+ +REFERENCE OUT IN C1- OUT R2 100kΩ MAX865 3.3µF C1 2.2µF C2+ C2- GND MAX6350 V- NR TRIM GND 0.1µF R1 10kΩ C3 2.2µF C2 1µF 2.2µF R3 1kΩ C4 1µF R4 100kΩ MAX400 0.1µF -REFERENCE OUT Figure 3.
PAGE 10
MAX6325/MAX6341/MAX6350 1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V Voltage References PDIPN.EPS SOICN.
PAGE 11
MAX6325/MAX6341/MAX6350 1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V Voltage References CDIPS.EPS ___________________________________________Package Information (continued) 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.