MAX1421 datasheet(5/17 Pages) MAXIM

5 / 17 page

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

with Internal Reference

_______________________________________________________________________________________

Note 1: Internal reference, REFIN bypassed to AGND with a combination of 0.22µF in parallel with 1nF capacitor.

Note 2: External +2.048V reference applied to REFIN.

Note 3: Internal reference disabled. VREFIN = 0, VREFP = +2.162V, VCML = +1.65V, and VREFN = +1.138V.

Note 4: IMD is measured with respect to either of the fundamental tones.

Note 5: Specifies the common-mode range of the differential input signal supplied to the MAX1421.

Note 6: VDIFF = VREFP - VREFN

Note 7: Input bandwidth is measured at a 3dB level.

Note 8: VREFIN is internally biased to +2.048V through a 10k

Ω resistor.

Note 9: Measured as the ratio of the change in mid-scale offset voltage for a ± 5% change in VAVDD using the internal reference.

ELECTRICAL CHARACTERISTICS (continued)

(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.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Pipeline Delay (Latency)

Figure 5

fCLK

cycles

Aperture Delay

tAD

Figure 9

Aperture Jitter

tAJ

Figure 9

Data Output Delay

tOD

Figure 5

Bus Enable Time

tBE

Figure 4

Bus Disable Time

tBD

Figure 4

Typical Operating Characteristics

(VAVDD = VDVDD = +3.3V, AGND = DGND = 0, VIN = ±1.024V, differential input voltage, fCLK = 40MHz (50% duty cycle), digital output

load CL = 10pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

-120

-80

-100

-40

-60

-20

010

515

FFT PLOT, 4096-POINT RECORD,

DIFFERENTIAL INPUT

ANALOG INPUT FREQUENCY (MHz)

fIN = 7.5439934MHz

AIN = -0.45dB FS

HD3

HD2

-120

-80

-100

-40

-60

-20

010

515

FFT PLOT, 4096-POINT RECORD,

DIFFERENTIAL INPUT

ANALOG INPUT FREQUENCY (MHz)

fIN = 19.9047628MHz

AIN = -0.50dB FS

HD2

HD3

-120

-80

-100

-40

-60

-20

010

515

FFT PLOT, 4096-POINT RECORD,

DIFFERENTIAL INPUT

ANALOG INPUT FREQUENCY (MHz)

fIN = 38.5440183MHz

AIN = -0.49dB FS

HD3

HD2

MAX1421 Datasheet(PDF) 5 Page - Maxim Integrated Products

MAX1421 Datasheet(HTML) 5 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Datasheet Download

Link URL