MAX1422ECM datasheet(2/15 Pages) MAXIM

2 / 15 page

12-Bit, 20Msps, 3.3V, Low-Power ADC with

Internal Reference

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VAVDD = VDVDD = 3.3V, AGND = DGND = 0, VIN = ±1.024V, differential input voltage at -0.5dBFS, internal reference, fCLK = 20MHz (50%

duty cycle); digital output load CL = 10pF,

≥+25°C guaranteed by production test, <+25°C guaranteed by design and characterization.

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 21.7mW/°C above +70°C)........1739mW

Operating Temperature Ranges

MAX1422CCM ....................................................0°C to +70°C

MAX1422ECM .................................................-40°C to +85°C

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

✕ 10-4

°C

Internal reference (Note 1)

-5

±0.1

External reference applied to REFIN, (Note 2)

-5

±0.2

Gain Error

External reference applied to REFP, CML,

and REFN (Note 3)

-1.5

1.5

%FSR

Gain Error Temperature

Coefficient

GETC

External reference applied to REFP, CML,

and REFN (Note 3)

✕ 10-6

°C

DYNAMIC PERFORMANCE (fCLK = 20MHz, 4096-point FFT)

Signal-to-Noise Ratio

SNR

fIN = 5MHz, TA = +25°C

Spurious-Free Dynamic Range

SFDR

fIN = 5MHz, TA = +25°C

dBc

Total Harmonic Distortion

THD

fIN = 5MHz, TA = +25°C

-72

-63

dBc

Signal-to-Noise and Distortion

SINAD

fIN = 5MHz, TA = +25°C

Effective Number of Bits

ENOB

fIN = 5MHz

10.5

Bits

Two-Tone Intermodulation

Distortion

IMD

fIN1 = 7.028MHz, fIN2 = 8.093MHz (Note 4)

-77

dBc

Differential Gain

±1%

Differential Phase

±0.25

Degrees

ANALOG INPUTS (INP, INN, CML)

Input Resistance

RIN

Either input to ground

Ω

Input Capacitance

CIN

Either input to ground

Common-Mode Input Level

(Note 5)

VCML

VAVDD ✕

0.5

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