MAX1231BCGI-T datasheet(3/24 Pages) MAXIM

Part #	MAX1231BCGI-T

Description	12-Bit 300ksps ADCs with FIFO, Temp Sensor, Internal Reference

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Manufacturer	MAXIM [Maxim Integrated Products]

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3 / 24 page

12-Bit 300ksps ADCs with FIFO,

Temp Sensor, Internal Reference

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(VDD = +2.7V to +3.6V, fSAMPLE = 300kHz, fSCLK = 4.8MHz (50% duty cycle), VREF = 2.5V, TA = TMIN to TMAX, unless otherwise

noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

CONVERSION RATE

External reference

0.8

Power-Up Time

tPU

Internal reference (Note 3)

65

µs

Acquisition Time

tACQ

0.6

µs

Internally clocked

3.5

Conversion Time

tCONV

Externally clocked (Note 4)

2.7

µs

Externally clocked conversion

0.1

4.8

External Clock Frequency

fSCLK

Data I/O

10

MHz

SCLK Duty Cycle

40

60

%

Aperture Delay

30

ns

Aperture Jitter

<50

ps

ANALOG INPUT

Unipolar

0

VREF

Input Voltage Range

Bipolar (Note 5)

-VREF / 2

VREF / 2

V

Input Leakage Current

VIN = VDD

±0.01

±1

µA

Input Capacitance

During acquisition time (Note 6)

24

pF

INTERNAL TEMPERATURE SENSOR

Grade A, TA = +25

°C

±0.3

Grade A, TA = -20°C to +85°C

±0.5

±1

Grade A, TA = TMIN to TMAX

±0.75

±1.5

Grade B, TA = +25

°C

±0.7

Measurement Error (Note 7)

Grade B, TA = TMIN to TMAX

±1.2

±2.5

°C

Temperature Measurement Noise

0.4

°CRMS

Temperature Resolution

1/8

°C

Power-Supply Rejection

0.3

°C/V

INTERNAL REFERENCE

REF Output Voltage

2.48

2.50

2.52

V

Grade A

±8

REF Temperature Coefficient

TCREF

Grade B

±30

ppm/°C

Output Resistance

6.5

k

Ω

REF Output Noise

200

µVRMS

REF Power-Supply Rejection

PSRR

-70

dB

EXTERNAL REFERENCE INPUT

REF- Input Voltage Range

VREF-

0

500

mV

REF+ Input Voltage Range

VREF+

1.0

VDD + 50mV

V

VREF+ = 2.5V, fSAMPLE = 300ksps

40

100

REF+ Input Current

IREF+

VREF+ = 2.5V, fSAMPLE = 0

±0.1

±5

µA

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