MAX1421 datasheet(2/17 Pages) MAXIM

2 / 17 page

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

with Internal Reference

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VAVDD = VDVDD = +3.3V, AGND = DGND = 0, VIN = ±1.024V, differential input voltage at -0.5dB FS, internal reference,

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

≈ 10pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at

TA = +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.

AVDD, DVDD to AGND..............................................-0.3V to +4V

DVDD, AVDD 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 (AVDD + 0.3V)

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

Continuous Power Dissipation (TA = +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

Bits

TA = +25

°C, no missing codes

-1

Differential Nonlinearity

DNL

TA = TMIN to TMAX

±0.5

LSB

Integral Nonlinearity

INL

TA = TMIN to TMAX

±2

LSB

Mid-scale Offset

MSO

-3

±.75

%FSR

Mid-scale Offset Temperature

Coefficient

MSOTC

3 ✕ 10-4

°C

Internal reference (Note 1)

-5

0.1

External reference applied to REFIN (Note 2)

-5

±3

Gain Error

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)

15 ✕ 10-6

°C

DYNAMIC PERFORMANCE (fCLK = 40MHz, 4096-point FFT)

fIN = 5MHz

Signal-to-Noise Ratio

SNR

fIN = 15MHz, TA = +25

°C62

fIN = 5MHz

Spurious-Free Dynamic Range

SFDR

fIN = 15MHz, TA = +25

°C64

dBc

fIN = 5MHz

-74

Total Harmonic Distortion

THD

fIN = 15MHz, TA = +25

°C

-69

-62

dBc

fIN = 5MHz

Signal-To-Noise Plus Distortion

SINAD

fIN = 15MHz, TA = +25

°C

63.5

fIN = 5MHz

10.7

Effective Number of Bits

ENOB

fIN = 15MHz, TA = +25

°C

10.3

Bits

Two-Tone Intermodulation

Distortion

IMDTT

fIN1 = 11.569MHz, fIN2 = 13.445MHz

(Note 4)

-80

dBc

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