LTC2415-1IGN datasheet(11/40 Pages) LINER

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LTC2415/LTC2415-1

sn2415 24151fs

FU CTIO AL BLOCK DIAGRA

Figure 1. Functional Block Diagram

AUTOCALIBRATION

AND CONTROL

DAC

DECIMATING FIR

INTERNAL

OSCILLATOR

SERIAL

INTERFACE

ADC

∑

∫

GND

VCC

IN+

IN–

SDO

SCK

REF+

REF –

(INT/EXT)

2415 FD

–+

–

FO (Pin 14): Frequency Control Pin. Digital input that

controls the ADC’s notch frequencies and conversion

time. When the FO pin is connected to VCC (LTC2415 only),

the converter uses its internal oscillator and the digital

filter first null is located at 50Hz. When the FO pin is

connected to GND (FO = OV), the converter uses its internal

oscillator and the digital filter first null is located at 60Hz

(LTC2415) or simultaneous 50Hz/60Hz (LTC2415-1).

When FO is driven by an external clock signal with a

frequency fEOSC, the converter uses this signal as its

system clock and the digital filter first null is located at a

frequency fEOSC/2560.

PI FU CTIO S

TEST CIRCUITS

1.69k

SDO

2415 TA03

Hi-Z TO VOH

VOL TO VOH

VOH TO Hi-Z

CLOAD = 20pF

1.69k

SDO

2415 TA04

Hi-Z TO VOL

VOH TO VOL

VOL TO Hi-Z

CLOAD = 20pF

VCC

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