ISL21090_12 Datasheet, PDF (1/17 Pages) Intersil Corporation – Ultra Low Noise, Precision Voltage Reference

Ultra Low Noise, Precision Voltage Reference
ISL21090
The ISL21090 is a ultra low noise, high DC accuracy precision
voltage reference with wide input voltage range. The ISL21090
uses the new Intersil Advanced Bipolar technology to achieve
sub 1.0µV_P-P (1.25V option) 0.1Hz to10Hz noise with an initial
voltage accuracy of 0.02% (2.5V option).
The ISL21090 offers 1.25V, 2.5V, and 5.0V output voltage
options with 7ppm/°C temperature coefficient and also
provides excellent line and load regulation. These devices are
offered in an 8 Ld SOIC package.
The ISL21090 is ideal for high-end instrumentation, data
acquisition and processing applications requiring high DC
precision where low noise performance is critical.
Applications
• High-End Instrumentation
• Precision Voltage Sources for Data Acquisition System,
Industrial Control, Communication Infrastructure
• Process Control and Instrumentations
• Active Source for Sensors
Features
• Reference Output Voltage Option
- 1.25V, 2.5V, and 5.0V (Released)
- 7.5V (Coming Soon)
• Initial Accuracy:
- ISL21090-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±0.03%
- ISL21090-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±0.02%
- ISL21090-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±0.025%
• Output Voltage Noise (0.1Hz to 10Hz) . . . . . . . . . . . . 1.0µV_P-PTyp
(1.25V Option)
• Supply Current . . . . . . . . . . . . . . . . . . . .750µA (1.25V Option)
• Temperature Coefficient . . . . . . . . . . . . . . . . . . 7ppm/°C Max
• Output Current Capability . . . . . . . . . . . . . . . . . . . . . . . . 20mA
• Line Regulation . . . . . . . . . . . . . . . . . 6ppm/V (1.25V Option)
• Load Regulation . . . . . . . . . . . . . . 2.5ppm/mA (1.25V Option)
• Operating Temperature Range. . . . . . . . . . .-40°C to +125°C
Related Literature
See AN1764, “ISL21090XXEV1Z User’s Guide”
VIN
10µF 0.1µF
1
DNC
2
VIN
3
COMP
4
GND
8
DNC
7
DNC
6
VOUT
5
TRIM
VREF
0.1µF
SERIAL CLOCK
CHIP SELECT
SERIAL DATA I/O
VDD
SCLK
CSb
SDIO
DAC
VREF
OUTxS
OUTxF
GND
DACOUTx
FIGURE 1. ISL21090 TYPICAL APPLICATION DIAGRAM
2.5010
TYPICAL TEMPERATURE
2.5005 ^{COEFFICIENT CURVE FOR 10 UNITS}
2.5000
2.4995
2.4990
2.4985
2.4980
-55 -35 -15 5
25 45 65 85 105 125 145
TEMPERATURE (°C)
FIGURE 2. V_OUT vs TEMPERATURE (2.5V OPTION)
November 21, 2012
1
FN6993.3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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