AD7707_17 datasheet(33/53 Pages) AD

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AD7707 Datasheet(PDF) 33 Page - Analog Devices

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AD7707

Rev. B | Page 32 of 52

POWER-UP AND CALIBRATION

On power-up, the AD7707 performs an internal reset that sets

the contents of the internal registers to a known state. There are

default values loaded to all registers after power-on or reset. The

default values contain nominal calibration coefficients for the

calibration registers. However, to ensure correct calibration for

the device, a calibration routine should be performed after

power-up. A calibration should be performed if the update rate

or gain are changed.

The power dissipation and temperature drift of the AD7707 are

low and no warm-up time is required before the initial calibration

is performed. However, if an external reference is being used,

this reference must stabilize before calibration is initiated.

Similarly, if the clock source for the part is generated from a

crystal or resonator across the MCLK pins, the start-up time for

the oscillator circuit should elapse before a calibration is

initiated on the part (see the Clocking and Oscillator Circuit

section).

Manufacturer	Part #	Datasheet	Description
Analog Devices	AD7707	693Kb / 52P	3-Channel 16-Bit, Sigma-Delta ADC REV. B

Manufacturer	Part #	Datasheet	Description
Analog Devices	AD7707	693Kb / 52P	3-Channel 16-Bit, Sigma-Delta ADC REV. B
	AD7715	495Kb / 40P	16-Bit, Sigma-Delta ADC REV. D
	AD7715	897Kb / 41P	16-Bit, Sigma-Delta ADC
	ADUM7703	353Kb / 22P	16-Bit, Isolated, Sigma-Delta ADC Rev. A
	ADUM7703	351Kb / 22P	16-Bit, Isolated, Sigma-Delta ADC
	AD7171	284Kb / 16P	16-Bit Low Power Sigma-Delta ADC REV. 0
	AD7171	313Kb / 17P	16-Bit, Low Power, Sigma-Delta ADC
Linear Technology	LTC2439-1	288Kb / 28P	8-/16-Channel 16-Bit No Latency Delta-Sigma ADC
Maxim Integrated Produc...	MX7705	664Kb / 34P	16-Bit, Low-Power, 2-Channel, Sigma-Delta ADC Rev 0; 10/03
Maxim Integrated Produc...	MX7705	528Kb / 33P	16-Bit, Low-Power, 2-Channel, Sigma-Delta ADC Rev 4; 2/10

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