Rainbow-electronics MAX1421 Instrukcja Użytkownika Pobierz pdf (Strona 8)

MAX1421

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

with Internal Reference

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

AVDD

= V

DVDD

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

= ±1.024V, differential input voltage, f

CLK

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

load C

= 10pF, T

= T

MIN

to T

MAX,

unless otherwise noted. Typical values are at T

= +25°C.)

10 2618 34

SFDR, SNR, THD, SINAD

vs. CLOCK FREQUENCY

MAX1421 toc22

CLOCK FREQUENCY (MHz)

SFDR, SNR, THD, SINAD (dB)

= 5MHz

SINAD

SNR

SFDR

THD

10,000

5000

20,000

15,000

25,000

30,000

N-1

N+2

OUTPUT NOISE HISTOGRAM (DC-INPUT)

MAX1421 toc25

DIGITAL OUTPUT NOISE

COUNTS

N-3

N+1

N+3

43707

10709

116

10824

179

N-2

40,000

35,000

45,000

50,000

2.00

2.02

2.06

2.04

2.08

2.10

-40 10-15 35 60 85

INTERNAL REFERENCE VOLTAGE

vs. TEMPERATURE

MAX1421 toc24

TEMPERATURE (°C)

REF

(V)

2.0750

2.0625

2.0500

2.0375

2.0250

3.1 3.33.2 3.4

INTERNAL REFERENCE VOLTAGE

vs. ANALOG SUPPLY VOLTAGE

MAX1421 toc23

(V)

REF

(V)

3.5

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

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