Rainbow-electronics MAX1145 Manual de usuario descargar pdf (Pagina 2)

MAX1144/MAX1145

14-Bit ADCs, 150ksps, 3.3V Single Supply

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(AV

= DV

= 3.3V ±5%, f

SCLK

= 3.6MHz, external clock (50% duty cycle), 24 clocks/conversion (150ksps), bipolar input, V

REF

2.048V, C

REF

= 4.7µF, C

CREF

= 1µF, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.)

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.

to AGND, DV

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

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

AIN to AGND ....................................................................±16.5V

CREF, REF to AGND................................-0.3V to (AV

+ 0.3V)

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

Digital Outputs to DGND .........................-0.3V to (DV

+ 0.3V)

Continuous Power Dissipation (T

= +70°C)

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

Operating Temperature Ranges

MAX114_ _CAP...................................................0°C to +70°C

MAX114_ _EAP................................................-40°C to +85°C

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

Junction Temperature......................................................+150°C

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

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DC ACCURACY (Note 1)

Resolution 14 Bits

MAX114_A ±1

Relative Accuracy INL Bipolar mode (Note 2)

MAX114_B ±2

LSB

No Missing Codes 14 Bits

MAX114_A -1 +1

Differential Nonlinearity DNL Bipolar mode

MAX114_B -1.00 +1.75

LSB

Transition Noise 0.47

LSB

RMS

Unipolar ±4

Offset Error

Bipolar ±6

Unipolar ±0.2

Gain Error (Note 3)

Bipolar ±0.3

%FSR

Offset Drift (Bipolar and Unipolar) Excluding reference drift ±1 ppm/°C

Gain Drift (Bipolar and Unipolar) Excluding reference drift ±4 ppm/°C

D YNA M IC SPEC IF IC A T IO N S ( 5 k Hz SINE- WAVE IN PU T, 1 50 k s ps , 3 .6M H Z C L O CK , BIPO LA R IN PU T M O DE. M A X1 14 4 , 1 2 V

P-P

. M A X1 14 5 ,

4 .09 6 V

P-P

= 5kHz 78 82

Signal-to-Noise Plus Distortion

(SINAD)

= 75kHz 81

= 5kHz 78 82

Signal-to-Noise Ratio

(SNR)

= 75kHz 81

= 5kHz -100 -90

Total Harmonic Distortion

(THD)

= 75kHz -94

= 5kHz 92 105

Spurious-Free-Dynamic Range

(SFDR)

= 75kHz 98

ANALOG INPUT

Unipolar 0 +6

MAX1144

Bipolar -6 +6

Unipolar 0 +2.048

Input Range

MAX1145

Bipolar -2.048 +2.048

1 2 3 4 5 6 7 ... 17 18

MAX1144/MAX1145 1

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Rainbow-electronics MAX1145 Manual de usuario Pagina 2

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