Datasheet > LTC1412

LTC1412

更新时间： 2023-12-20 18:44:05

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
16页	338K
描述
12 位、3Msps、采样 A/D 转换器

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数据手册

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LTC1412 数据手册

LTC1412

U W

TYPICAL PERFOR A CE CHARACTERISTICS

Power Supply Feedthrough

vs Ripple Frequency

Input Common Mode Rejection

vs Input Frequency

–20

–40

–60

–80

–100

–120

DGND

10k

100k

10M

10k

100k

10M

RIPPLE FREQUENCY (Hz)

INPUT FREQUENCY (Hz)

1412 G08

1412 G09

PIN FUNCTIONS

A_IN(Pin 1): Positive Analog Input. ±2.5V input range

OV_DD(Pin21):PositiveSupplyfortheOutputDrivers. Tie

to Pin 28 when driving 5V logic. Tie to 3V when driving

3V logic.

–

when A_INis grounded. ±2.5V differential if A_INis

driven.

A_IN^–(Pin 2): Negative Analog Input. Can be grounded or

OGND (Pin 22): Digital Ground for the Output Drivers.

driven differentially with A_IN

CONVST(Pin23):ConversionStartSignal.Thisactivelow

signal starts a conversion on its falling edge.

V_REF(Pin 3): 2.5V Reference Output.

REFCOMP (Pin 4): 4.06V Reference Bypass Pin.

Bypass to AGND with 10µF ceramic (or 10µF tantalum in

parallel with 0.1µF ceramic).

CS (Pin 24): Chip Select. This input must be low for the

ADC to recognize the CONVST inputs.

BUSY (Pin 25): The BUSY Output Shows the Converter

Status. It is low when a conversion is in progress.

AGND (Pin 5): Analog Ground.

D11 to D4 (Pins 6 to 13): Three-State Data Outputs.

DGND (Pin 14): Digital Ground for Internal Logic.

D3 to D0 (Pins 15 to 18): Three-State Data Outputs.

DGND (Pin 19): Digital Ground for Internal Logic.

V_SS(Pin 26): –5V Negative Supply. Bypass to AGND with

10µF ceramic (or 10µF tantalum in parallel with 0.1µF

ceramic).

DV_DD(Pin 27): 5V Positive Supply. Tie to Pin 28.

AV_DD(Pin 28): 5V Positive Supply. Bypass to AGND with

10µF ceramic (or 10µF tantalum in parallel with 0.1µF

ceramic).

DV_DD(Pin 20): 5V Positive Supply. Tie to Pin 28. Bypass

to AGND with 0.1µF ceramic.

1...3 4 567 8 9...16

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