LTC1420I データシートの表示（PDF） - Linear Technology

部品番号

コンポーネント説明

メーカー

LTC1420I

12-Bit, 10Msps, Sampling ADC

Linear Technology 

LTC1420

PIN FUNCTIONS

VDD (Pin 23): Analog 5V Supply. Bypass to GND with a 1µF

ceramic.

GND (Pin 24): Analog Power Ground.

VSS (Pin 25): Negative Supply. Can be – 5V or 0V. If VSS is

not shorted to GND, bypass to GND with a 1µF ceramic.

CLK (Pin 26): Conversion Start Signal. This active high

signal starts a conversion on its rising edge.

OF (Pin 27): Overflow Output. This signal is high when the

digital output is 011111111111 or 100000000000.

GAIN (Pin 28): Gain Select for Input PGA. 5V selects an

input gain of 1, 0V selects a gain of 2.

W

FUNCTIONAL BLOCK DIAGRA

+AIN

–AIN

VCM

SENSE

GAIN

S/H

MODE SELECT

VREF

VSS

0V OR –5V

5V

VDD

VDD

OPTIONAL 3V

LOGIC SUPPLY

(PIN 7) (PIN 23) OVDD

PIPELINED 12-BIT ADC

DIGITAL CORRECTION

LOGIC

2.5V

REFERENCE

2.048V

OUTPUT

BUFFERS

OF

D11 (MSB)

D0 (LSB)

CLK

GND

(PIN 6)

GND

(PIN 8)

GND

OGND

(PIN 24)

1420 BD

WU

W

TI I G DIAGRA

ANALOG

INPUT

CLK

DATA

OUTPUT

N+1

N

tCLOCK

tH

tL

N+2

N+3

tCONV

N–3

tACQ

N–2

N–1

N

1420 TD

7

Share Link: