PDF《Precision Voltage References》

General Description The MAX873/MAX875/MAX876 precision 2.

5V, 5V, and 10V references offer excellent accuracy and very low power consumption. Extremely low temperature drift combined with excellent line and load regulation permit stable operation over a wide range of electrical and envi- ronmental conditions. Operation for the MAX873 is guar- anteed with a +4.5V supply, making the part ideal in systems running from a +5V ±10% supply. Low 10Hz to 1kHz noise―typically 3.8?VRMS, 9?VRMS, and 18?VRMS, respectively, for the MAX873, MAX875, MAX876―make the parts suitable for 12-bit data-acquisition systems. A TRIM pin facilitates adjustment of the reference voltage over a ±6% range, using only a 100k? potentiometer. A voltage output proportional to temperature provides a source for temperature compensation circuits, tempera- ture warning circuits, and other applications. Applications 12-Bit ADCs and DACs Digital Multimeters Portable Data-Acquisition Systems Low-Power Test Equipment Features ? MAX873/MAX875/MAX876 +2.5V/+5V/+10V Outputs ±1.5mV/±2.0mV/±3.0mV (max) Initial Accuracy ? 7ppm/°C (max) Temperature Coefficient ? 450?A (max) Quiescent Current ? Low Noise: 3.8?VP-P (typ at 2.5V) ? Sources 10mA, Sinks 2mA ? 15ppm/mA Load Regulation (max) ? 4ppm/V Line Regulation (max) ? Wide Supply Voltage Range, +4.5V to +18V (MAX873) ? TEMP Output Proportional to Temperature MAX873/MAX875/MAX876 Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References Maxim Integrated Products

1 19-0038;

Rev 3;

6/07 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim'

s website at www.maxim-ic.com. Ordering Information/Selector Guide +2.5V (MAX873) +5.0V (MAX875) +10.0V (MAX876) *OPTIONAL IN V+ 0V GND 0.1?F* OUT MAX873 MAX875 MAX876 Typical Operating Circuit Pin Configuration appears at end of data sheet. PART PIN- PACKAGE OUTPUT VOLTAGE (V) MAX TEMPCO (ppm/°C) INITIAL ACCURACY % PKG CODE MAX873AESA+

8 SO 2.500

7 ± 0.06 S8-4 MAX873BESA+

8 SO 2.500

20 ± 0.10 S8-4 MAX875AESA+

8 SO 5.000

7 ± 0.04 S8-4 MAX875BESA+

8 SO 5.000

20 ± 0.06 S8-4 MAX876AESA+

8 SO 10.000

7 ± 0.03 S8-4 MAX876BESA+

8 SO 10.000

20 ± 0.05 S8-4 +Denotes a lead-free package. Note: All devices are specified over the -40°C to +85°C operating temperature range. MAX873/MAX875/MAX876 Low-Power, Low-Drift, +2.5V/+5V/+10V Precision Voltage References

2 ABSOLUTE MAXIMUM RATINGS Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. IN to GND.0.3V to +20V OUT, TRIM, TEMP, TEST.0.3V to (IN + 0.3V) Output Short-Circuit Duration (to GND)5s Continuous Power Dissipation (TA = +70°C) SO (derate 5.88mW/°C above +70°C)471mW Operating Temperature Ranges: MAX87_ _E_A 40°C to +85°C Storage Temperature Range 65°C to +150°C Lead Temperature (soldering, 10s)300°C Junction Temperature (TJ)150°C ELECTRICAL CHARACTERISTICS―MAX873 (VIN = +5V, IL = 0mA, CLOAD <

100pF, TA = -40°C to +85°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX873A (0.06%) 2.4985 2.5000 2.5015 Output Voltage VOUT TA = +25°C MAX873B (0.10%) 2.4975 2.5000 2.5025 V MAX873A

2 7 Output-Voltage Drift (Note 1) TCVOUT MAX873B

5 20 ppm/°C 0.1Hz to 10Hz 3.8 ?VP-P Output-Noise Voltage en TA = +25°C 10Hz to 1kHz 6.8 ?VRMS TA = +25°C