Datasheet > LTC1297

LTC1297

更新时间： 2023-12-20 18:44:05

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
24页	317K
描述
单芯片 12 位数据采集系统

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数据手册

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LTC1297 数据手册

LTC1292/LTC1297

The ● denotes the specifications which

DIGITAL A D DC ELECTRICAL CHARACTERISTICS

apply over the full operating temperature range, otherwise specifications are at T_A= 25°C. (Note 3)

LTC1292B/LTC1297B

LTC1292C/LTC1297C

LTC1292D/LTC1297D

SYMBOL PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Positive Supply Current

CS High

LTC1292

LTC1297

●

CS Low

µA

CS High Power Shutdown CLK Off

CS High

Reference Current

REF

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

below GND or one diode drop above V . Be careful during testing at low

levels (4.5V), as high level reference or analog inputs (5V) can cause

this input diode to conduct, especially at elevated temperatures, and cause

errors for inputs near full scale. This spec allows 50mV forward bias of

either diode. This means that as long as the reference or analog input does

not exceed the supply voltage by more than 50mV, the output code will be

correct. To achieve an absolute 0V to 5V input voltage range will therefore

require a minimum supply voltage of 4.950V over initial tolerance,

temperature variations and loading.

Note 2: All voltage values are with respect to ground (unless otherwise

noted).

Note 3: V = 5V, V = 5V, CLK = 1.0MHz unless otherwise specified.

REF

Note 4: One LSB is equal to V divided by 4096. For example, when

REF

= 5V, 1LSB = 5V/4096 = 1.22mV.

REF

Note 5: Linearity error is specified between the actual end points of the

A/D transfer curve. The deviation is measured from the center of the

quantization band.

Note 6: Recommended operating conditions.

Note 7: Two on-chip diodes are tied to each reference and analog input

Note 8: Channel leakage current is measured after the channel selection.

Note 9: Increased leakage currents at elevated temperatures cause the

S/H to droop, therefore it is recommended that f ≥125kHz at 125°C,

CLK

≥ 31kHz at 85°C, and f

≥ 3kHz at 25°C.

CLK

which will conduct for reference or analog input voltages one diode drop

U W

TYPICAL PERFOR A CE CHARACTERISTICS

LTC1297 Supply Current (Power

Supply Current vs Supply Voltage

Supply Current vs Temperature

Shutdown) vs Temperature

= 5V

CLK = 1MHz

REF

CLK = 1MHz

= 25°C

= 5V

CS HIGH

CLK OFF

–50

125

–25

100

130

110

–50 –30 –10 10

AMBIENT TEMPERATURE (°C)

SUPPLY VOLTAGE (V)

AMBIENT TEMPERATURE (°C)

LTC1292/7 G01

LTC1292/7 G03

LTC1292/7 G02

12927fb

1 2 345 6 7...24

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