ISL21007DFB812Z datasheet(11/14 Pages) INTERSIL

Nome de Peças	ISL21007DFB812Z

Descrição Electrónicos	Precision, Low Noise FGA??Voltage References

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Fabricante Electrônico	INTERSIL [Intersil Corporation]

Página de início	http://www.intersil.com/cda/home

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11 / 14 page

11

FN6326.1

April 12, 2007

0.01µF value can be increased for better load transient

response with little sacrifice in output stability.

Turn-On Time

The ISL21007 devices have low supply current and thus the

time to bias up internal circuitry to final values will be longer

than with higher power references. Normal turn-on time is

typically 120µs. This is shown in Figure 10. Circuit design

must take this into account when looking at power up delays

or sequencing.

Temperature Coefficient

The limits stated for temperature coefficient (tempco) are

governed by the method of measurement. The overwhelming

standard for specifying the temperature drift of a reference is to

measure the reference voltage at two temperatures, take the

total variation, (VHIGH – VLOW), and divide by the temperature

extremes of measurement (THIGH –TLOW). The result is

divided by the nominal reference voltage (at T = +25°C) and

multiplied by 106 to yield ppm/°C. This is the “Box” method for

specifying temperature coefficient.

Output Voltage Adjustment

The output voltage can be adjusted up or down by 2.5% by

placing a potentiometer from Vout to ground, and connecting

the wiper to the TRIM pin. The TRIM input is high impedance,

so no series resistance is needed. The resistor in the

potentiometer should be a low tempco (<50ppm/°C) and the

resulting voltage divider should have very low tempco

<5ppm/°C. A digital potentiometer such as the ISL95810

provides a low tempco resistance and excellent resistor and

tempco matching for trim applications.

VIN = 3.0V

VIN

VO

GND

ISL21007

0.01µF

10µF

2k

Ω

0.1µF

10µF

FIGURE 28. HANDLING HIGH LOAD CAPACITANCE

ISL21007

Nº de peça semelhante - ISL21007DFB812Z

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Intersil Corporation	ISL21007DFB812Z	879Kb / 18P	Precision, Low Noise FGA?줧oltage References
Intersil Corporation	ISL21007DFB812Z	1Mb / 20P	Precision, Low Noise FGA??Voltage References
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