MAX1245ACAP datasheet(2/20 Pages) MAXIM

2 / 20 page

+2.375V, Low-Power, 8-Channel,

Serial 12-Bit ADC

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD = +2.375V to +3.3V, COM = 0V, fCLK = 1.5MHz, external clock (50% duty cycle), 15 clocks/conversion cycle (100ksps),

VREF = 2.048V applied to VREF pin, TA = TMIN to TMAX, unless otherwise noted.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

VDD to AGND, DGND .............................................. -0.3V to +6V

AGND to DGND.................................................... -0.3V to +0.3V

CH0–CH7, COM to AGND, DGND ............ -0.3V to (VDD + 0.3V)

VREF to AGND........................................... -0.3V to (VDD + 0.3V)

Digital Inputs to DGND............................................ -0.3V to +6V

Digital Outputs to DGND ........................... -0.3V to (VDD + 0.3V)

Digital Output Sink Current .................................................25mA

Continuous Power Dissipation (TA = +70°C)

Plastic DIP (derate 11.11mW/°C above +70°C) ......... 889mW

SSOP (derate 8.00mW/°C above +70°C) ................... 640mW

CERDIP (derate 11.11mW/°C above +70°C) .............. 889mW

Operating Temperature Ranges

MAX1245_C_P ................................................... 0°C to +70°C

MAX1245_E_P ................................................ -40°C to +85°C

Storage Temperature Range ............................ -60°C to +150°C

Lead Temperature (soldering, 10sec) ............................ +300°C

µs

tCONV

Conversion Time (Note 5)

5.5

7.5

MHz

1.0

Full-Power Bandwidth

MHz

2.25

Small-Signal Bandwidth

-85

Channel-to-Channel Crosstalk

SFDR

Spurious-Free Dynamic Range

-76

THD

Total Harmonic Distortion

SINAD

Signal-to-Noise + Distortion Ratio

LSB

±0.2

Channel-to-Channel Offset

Matching

ppm/°C

±0.25

Gain Temperature Coefficient

±0.5

Bits

Resolution

LSB

Gain Error (Note 3)

±0.5

±4

LSB

±1.0

INL

Relative Accuracy (Note 2)

LSB

±1

DNL

LSB

±0.5

±4

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

External clock = 1.5MHz, 12 clocks/conversion

Internal clock,

SHDN = VDD

Internal clock,

SHDN = FLOAT

MAX1245A

-3dB rolloff

50kHz, 2Vp-p (Note 4)

Up to the 5th harmonic

MAX1245B

No missing codes over temperature

CONDITIONS

Differential Nonlinearity

Aperture Delay

MHz

1.5

SHDN = FLOAT

<50

Aperture Jitter

MHz

0.1

1.5

µs

2.0

tACQ

Track/Hold Acquisition Time

External clock = 1.5MHz

0.225

Internal Clock Frequency

SHDN = VDD

1.5

External Clock Frequency

Data transfer only

DC ACCURACY (Note 1)

DYNAMIC SPECIFICATIONS (10kHz sine-wave input, 0Vp-p to 2.048Vp-p, 100ksps, 1.5MHz external clock, bipolar input mode)

CONVERSION RATE

Offset Error

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