Datasheet

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

General Description

The MAX6225/MAX6241/MAX6250 are low-noise, pre-

cision voltage references with extremely low 1ppm/°C

temperature coefficients and excellent ±0.02% initial

accuracy. These devices feature buried-zener technology

for lowest noise performance. Load-regulation specifica-

tions are guaranteed for source and sink currents up to

15mA. Excellent line and load regulation and low output

impedance at high frequency make them ideal for high-

resolution data-conversion systems up to 16 bits.

The MAX6225 is set for 2.500V output, the MAX6241 is

set for 4.096V output, and the MAX6250 is set for 5.000V

output. All three devices 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

● Low 1.0ppm/°C Temperature Coefficient

● Very Low 1.5μV

P-P

Noise (0.1Hz to 10Hz)

● ±0.02% Initial Accuracy

● ±15mA Output Source and Sink Current

● Low, 18mW Power Consumption (MAX6225)

● Industry-Standard Pinout

● Optional Noise Reduction and Voltage Trim

● Excellent Transient Response

● 8-Pin SO Package Available

● Low 20ppm/1000h Long-Term Stability

● Stable for All Capacitive Loads

Ordering Information appears at end of data sheet.

19-1139; Rev 5; 3/14

+Denotes a lead(Pb)-free/RoHS-compliant package.

PART TEMP RANGE

PIN-

PACKAGE

MAX

TEMPCO

(ppm/°C)

MAX6225ACPA+ 0°C to +70°C 8 Plastic DIP 2.0

MAX6225BCPA+ 0°C to +70°C 8 Plastic DIP 5.0

MAX6225ACSA+ 0°C to +70°C 8 SO 2.0

MAX6225BCSA+ 0°C to +70°C 8 SO 5.0

MAX6225AEPA+ -40°C to +85°C 8 Plastic DIP 3.0

MAX6225BEPA+ -40°C to +85°C 8 Plastic DIP 7.0

MAX6225AESA+ -40°C to +85°C 8 SO 5.0

MAX6225BESA+ -40°C to +85°C 8 SO 7.0

MAX6225AMJA -55°C to +125°C 8 CERDIP 5.0

MAX6225BMJA -55°C to +125°C 8 CERDIP 8.0

8V TO 36V INPUT

REFERENCE OUT

*OPTIONAL

OUT

TRIM

2.2µF*

GND

MAX6225

MAX6241

MAX6250

DIP/SO

TOP VIEW

I.C. = INTERNALLY CONNECTED; DO NOT USE

MAX6225

MAX6241

MAX6250

OUT

TRIMGND

I.C.

I.C.IN

I.C.

MAX6225/MAX6241/MAX6250 Low-Noise, Precision,

+2.5V/+4.096V/+5V Voltage References

Typical Operating Circuit

Pin Conguration

Ordering Information

Summary of content (11 pages)

PAGE 1
MAX6225/MAX6241/MAX6250 Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage References General Description Features The MAX6225 is set for 2.500V output, the MAX6241 is set for 4.096V output, and the MAX6250 is set for 5.000V output. All three devices provide for the option of external trimming and noise reduction. Ordering Information The MAX6225/MAX6241/MAX6250 are low-noise, precision voltage references with extremely low 1ppm/°C temperature coefficients and excellent ±0.02% initial accuracy.
PAGE 2
MAX6225/MAX6241/MAX6250 Low-Noise, Precision, +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
MAX6225/MAX6241/MAX6250 Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage References Electrical Characteristics—MAX6225 (continued) (VIN = +10V, IOUT = 0mA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS Sourcing: 0mA ≤ IOUT ≤ 15mA Load Regulation (Note 2) Supply Current Trim-Adjustment Range ΔVOUT / ΔIOUT IIN ΔVOUT Turn-On Settling Time tON Output Noise Voltage (Note 3) en Temperature Hysteresis Long-Term Stability www.maximintegrated.
PAGE 4
MAX6225/MAX6241/MAX6250 Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage References Electrical Characteristics—MAX6241 (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 TA MIN C, E, M 8 MAX6241A +25°C 4.095 4.096 4.097 MAX6241B +25°C 4.092 4.096 4.100 C 1.0 2.0 MAX6241AE_A E 1.5 3.0 MAX6241AMJA M 2.0 5.0 MAX6241BC_A C 2.5 5.0 MAX6241BE_A E 2.5 7.
PAGE 5
MAX6225/MAX6241/MAX6250 Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage References Electrical Characteristics—MAX6250 (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 TA MIN C, E, M 8 MAX6250A +25°C 4.999 5.000 5.001 MAX6250B +25°C 4.995 5.000 5.005 C 1.0 2.0 MAX6250AE_A E 1.5 3.0 MAX6250AMJA M 2.0 5.0 MAX6250BC_A C 2.5 5.0 MAX6250BE_A E 2.5 7.
PAGE 6
MAX6225/MAX6241/MAX6250 Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage References Typical Operating Characteristics (VIN = 10V, IOUT = 0mA, TA = +25°C, unless otherwise noted.) 1.0 200 0.5 100 0 0 -0.5 -100 -1.0 -200 -1.5 -55 -35 -15 120 0.2 80 0.1 40 -125 5 25 45 -250 85 105 125 65 0 -0.1 -40 -0.2 -80 -0.3 -120 -0.
PAGE 7
MAX6225/MAX6241/MAX6250 Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage References Typical Operating Characteristics (continued) (VIN = 10V, IOUT = 0mA, TA = +25°C, unless otherwise noted.) 35 30 25 20 CNR = 1µF 15 10 5 0 10 100 1k 70 50 40 30 CNR = 1µF 20 10 0 10k CNR = 0µF 60 10 100 FREQUENCY (Hz) MAX6241 0.1Hz to 10Hz NOISE MAX6225 toc13 CNR = 1µF 20 10 10 100 1M 10k MAX6225 toc15 VOUT, 1µV/div 100 MAX6241 90 MAX6250 80 60 RIPPLE REJECTION vs.
PAGE 8
MAX6225/MAX6241/MAX6250 Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage References Typical Operating Characteristics (continued) (VIN = 10V, IOUT = 0mA, TA = +25°C, unless otherwise noted.
PAGE 9
MAX6225/MAX6241/MAX6250 Pin Description Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage References Noise Reduction PIN NAME FUNCTION 1, 7, 8 I.C. Internally Connected. Do not use. 2 IN Positive Power-Supply Input 3 NR Noise Reduction. Optional capacitor connection for wideband noise reduction. Leave open if not used (Figure 2). 4 GND Ground 5 TRIM External Trim Input. Allows ±1% output adjustment (Figure 1). Leave open if not used.
PAGE 10
MAX6225/MAX6241/MAX6250 Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage References +5V INPUT 3.3µF C1+ VCC V+ IN C1- +REFERENCE OUT OUT MAX865 3.3µF C2- GND R2 100kΩ MAX6250 C1 2.2µF C2+ V- NR TRIM GND C2 1µF R1 10kΩ C3 2.2µF 2.2µF R3 1kΩ C4 1µF MAX432 R4 100kΩ -REFERENCE OUT Figure 3. +5V and -5V References from a Single +5V Supply Ordering Information (continued) PART TEMP RANGE PINPACKAGE MAX TEMPCO (ppm/°C) MAX6241ACPA+ 0°C to +70°C 8 Plastic DIP 2.
PAGE 11
MAX6225/MAX6241/MAX6250 Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage References Revision History REVISION NUMBER REVISION DATE PAGES CHANGED DESCRIPTION 0 9/96 Initial release — 4 1/01 Updated Electrical Characteristics Note 3 5 5 3/14 Added lead-free notation to Ordering Information and updated Package Information 1, 10 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.