Rainbow-electronics MAX1421 Instrukcja Użytkownika Pobierz pdf (Strona 2)

MAX1421

12-Bit, 40Msps, +3.3V, Low-Power ADC

with Internal Reference

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

AVDD

= V

DVDD

= +3.3V, AGND = DGND = 0, V

= ±1.024V, differential input voltage at -0.5dB FS, internal reference,

CLK

= 40MHz (50% duty cycle), digital output load C

≈ 10pF, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

= +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.

, DV

to AGND..............................................-0.3V to +4V

, AV

to DGND..............................................-0.3V to +4V

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

INP, INN, REFP, REFN, REFIN,

CML, CLK, CLK,....................(AGND - 0.3V) to (AV

+ 0.3V)

D0–D11, OE, PD .......................(DGND - 0.3V) to (DV

+ 0.3V)

Continuous Power Dissipation (T

= +70°C)

48-Pin TQFP (derate 12.5mW/°C above +70°C)........1000mW

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

Operating Temperature Ranges

MAX1421CCM ...................................................0°C to +70°C

MAX1421ECM ................................................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

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

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DC ACCURACY

Resolution RES 12 Bits

= +25°C, no missing codes -1 1

Differential Nonlinearity DNL

= T

MIN

to T

MAX

±0.5

LSB

Integral Nonlinearity INL T

= T

MIN

to T

MAX

±2 LSB

Mid-scale Offset MSO -3 ±.75 3 %FSR

Mid-scale Offset Temperature

Coefficient

MSOTC 3

-4

%/°C

Internal reference (Note 1) -5 0.1 5

External reference applied to REFIN (Note 2) -5 ±3 5

Gain Error GE

External reference applied to REFP, CML,

and REFN (Note 3)

-1.5 ±0.5 1.5

%FSR

Gain Error Temperature

Coefficient

GETC

External reference applied to REFP, CML,

and REFN, (Note 3)

-6

%/°C

DYNAMIC PERFORMANCE (f

CLK

= 40MHz, 4096-point FFT)

= 5MHz 67

Signal-to-Noise Ratio SNR

= 15MHz, T

= +25°C6266

= 5MHz 73

Spurious-Free Dynamic Range SFDR

= 15MHz, T

= +25°C6470

dBc

= 5MHz -74

Total Harmonic Distortion THD

= 15MHz, T

= +25°C -69 -62

dBc

= 5MHz 66

Signal-To-Noise Plus Distortion SINAD

= 15MHz, T

= +25°C 60 63.5

= 5MHz 10.7

Effective Number of Bits ENOB

= 15MHz, T

= +25°C 60 10.3

Bits

Two-Tone Intermodulation

Distortion

IMD

IN1

= 11.569MHz, f

IN2

= 13.445MHz

(Note 4)

-80 dBc

1 2 3 4 5 6 7 ... 16 17

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