LTC1272-3ACSW Просмотр технического описания (PDF) - Linear Technology

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LTC1272-3ACSW

12-Bit, 3µs, 250kHz Sampling A/D Converter

Linear Technology 

LTC1272

I TER AL REFERE CE CHARACTERISTICS The ● denotes the specifications which apply over the full

operating temperature range, otherwise specifications are at TA = 25°C. (Note 4)

PARAMETER

CONDITIONS

LTC1272-XA

MIN TYP MAX

LTC1272-XC

MIN TYP MAX

UNITS

VREF Output Voltage (Note 6)

IOUT = 0

2.400 2.420 2.440 2.400 2.420 2.440

V

VREF Output Tempco

IOUT = 0

●

5

25

10

45 ppm/°C

VREF Line Regulation

4.75V ≤ VDD ≤ 5.25V, IOUT = 0

0.01

0.01

LSB/V

VREF Load Regulation (Sourcing Current) 0 ≤ ⎢IOUT ⎢ ≤ 1mA

2

2

LSB/mA

DIGITAL AND DC ELECTRICAL CHARACTERISTICS The ● denotes the specifications which

apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 4)

SYMBOL

PARAMETER

CONDITIONS

LTC1272-XA/C

MIN TYP MAX

UNITS

VIH

High Level Input Voltage CS, RD, HBEN, CLK IN

VDD = 5.25V

● 2.4

V

VIL

Low Level Input Voltage CS, RD, HBEN, CLK IN

VDD = 4.75V

●

0.8

V

IIN

Input Current CS, RD, HBEN

VIN = 0V to VDD

●

± 10

µA

Input Current CLK IN

VIN = 0V to VDD

●

± 20

µA

VOH

High Level Output Voltage All Logic Outputs

VDD = 4.75V IOUT = – 10µA

4.7

V

IOUT = – 200µA

●

4.0

V

VOL

Low Level Output Voltage All Logic Outputs

VDD = 4.75V, IOUT = 1.6mA

●

0.4

V

IOZ

High-Z Output Leakage D11-D0/8

VOUT = 0V to VDD

●

± 10

µA

COZ

High-Z Output Capacitance (Note 7)

●

15

pF

ISOURCE

Output Source Current

VOUT = 0V

– 10

mA

ISINK

Output Sink Current

VOUT = VDD

10

mA

IDD

Positive Supply Current

CS = RD = VDD, AIN = 5V

●

15

30

mA

PD

Power Dissipation

75

mW

DY A

SYMBOL

S/(N + D)

THD

IC ACCURACY (Note 4) fSAMPLE = 250kHz (LTC1272-3), 166kHz (LTC1272-5), 111kHz (LTC1272-8)

PARAMETER

CONDITIONS

LTC1272-XA/C

MIN TYP MAX

Signal-to-Noise Plus Distortion Ratio

10kHz Input Signal

72

Total Harmonic Distortion (Up to 5th Harmonic)

10kHz Input Signal

– 82

Peak Harmonic or Spurious Noise

10kHz Input Signal

– 82

UNITS

dB

dB

dB

A ALOG I PUT The ● denotes the specifications which apply over the full operating temperature range, otherwise

specifications are at TA = 25°C. (Note 4)

SYMBOL

PARAMETER

CONDITIONS

LTC1272-XA/B/C

MIN TYP MAX

UNITS

VIN

Input Voltage Range

IIN

Input Current

CIN

Input Capacitance

tACQ

Sample-and-Hold Acquisition Time

4.75V ≤ VDD ≤ 5.25V

●

0

5

V

●

3.5

mA

50

pF

●

0.45

1

µs

1272fb

3

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