MAX1421 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

MFG CO.

MAX1421

12-Bit, 40Msps, 3.3V, Low-Power ADC with Internal Reference

Maxim Integrated 

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

with 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 ≥ +25°C guaranteed by production test, TA < +25°C guarnateed

by design and characterization. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Pipeline Delay (Latency)

Figure 5

7

fCLK

cycles

Aperture Delay

Aperture Jitter

Data Output Delay

Bus Enable Time

Bus Disable Time

tAD

Figure 9

tAJ

Figure 9

tOD

Figure 5

tBE

Figure 4

tBD

Figure 4

2

ns

2

ps

5

10

14

ns

5

ns

5

ns

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 10kΩ 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.

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.)

FFT PLOT, 4096-POINT RECORD,

DIFFERENTIAL INPUT

0

fIN = 7.54MHz

AIN = -0.45dB FS

-20

FFT PLOT, 4096-POINT RECORD,

DIFFERENTIAL INPUT

0

fIN = 19.90MHz

AIN = -0.50dB FS

-20

fIN

FFT PLOT, 4096-POINT RECORD,

DIFFERENTIAL INPUT

0

fIN = 38.54MHz

AIN = -0.49dB FS

-20

-40

-40

-40

HD2

HD2

HD3

-60

HD2

HD3

-60

-60

HD3

-80

-80

-80

-100

-100

-100

-120

0

5

10

15

20

ANALOG INPUT FREQUENCY (MHz)

-120

0

5

10

15

20

ANALOG INPUT FREQUENCY (MHz)

-120

0

5

10

15

20

ANALOG INPUT FREQUENCY (MHz)

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