Rainbow-electronics MAX1422 Manual de usuario descargar pdf (Pagina 7)

MAX1422

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

Internal Reference

_______________________________________________________________________________________ 7

0.5

0.2

-0.1

-0.4

-0.7

-40 10-15 35 60 85

GAIN ERROR vs. TEMPERATURE,

EXTERNAL REFERENCE (V

REFIN

= +2.048V)

MAX1422 toc19

TEMPERATURE (°C)

GAIN ERROR (%FSR)

-1.0

-40 10-15 356085

ANALOG SUPPLY CURRENT

vs. TEMPERATURE

MAX1422 toc20

TEMPERATURE (°C)

AVDD

(mA)

-40 10-15 35 60 85

DIGITAL SUPPLY CURRENT

vs. TEMPERATURE

MAX1422 toc21

TEMPERATURE (°C)

DVDD

(mA)

= 10pF

08412

SFDR, SNR, THD, SINAD

vs. CLOCK FREQUENCY

MAX1422 toc22

CLOCK FREQUENCY (MHz)

SFDR, SNR, THD, SINAD (dB)

SINAD

SNR

SFDR

16 20

= 5MHz

THD

2.05

2.04

2.03

2.02

2.01

3.1 3.33.2 3.4

INTERNAL REFERENCE VOLTAGE

vs. ANALOG SUPPLY VOLTAGE

MAX1422 toc23

(V)

REF

(V)

3.5

2.00

2.02

2.06

2.04

2.08

2.10

-40 10-15 35 60 85

INTERNAL REFERENCE VOLTAGE

vs. TEMPERATURE

MAX1422 toc24

TEMPERATURE (°C)

REF

(V)

10,000

5000

20,000

15,000

25,000

30,000

N-1

N+2

OUTPUT NOISE HISTOGRAM (DC-INPUT)

MAX1422 toc25

DIGITAL OUTPUT NOISE

COUNTS

N-4

N-3

N+1

N+3

27360

16623

3431

15029

162

2596

310

N-2

N+4

N+5

Typical Operating Characteristics (continued)

AVDD

= V

DVDD

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

= ±1.024V, differential input voltage, f

CLK

= 20MHz (50% duty cycle) digital

output load C

= 10pF, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25 °C.)

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

Internal Reference 1

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Rainbow-electronics MAX1422 Manual de usuario Pagina 7

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