Rainbow-electronics MAX1211 Manual do Utilizador descarregar pdf (Página 21)

MAX1211

65Msps, 12-Bit, IF Sampling ADC

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GRAY CODE

OUTPUT CODE

(G/TT

= 1)

TWO’S COMPLEMENT

OUTPUT CODE

(G/TT

= 0)

BINARY

D11  D0

DOR

HEXADECIMAL

EQUIVALENT

D11  D0

DECIMAL

EQUIVALENT

D11  D0

(CODE

)

BINARY

D11  D0

DOR

HEXADECIMAL

EQUIVALENT

D11  D0

DECIMAL

EQUIVALENT

D11  D0

(CODE

)

IN P

- V

IN N

REFP

= 2.162 V

REFN

= 1.138 V

1000 0000 0000

0x800 +4095

0111 1111 1111 1

0x7FF +2047

>+1.0235V

(DATA OUT OF

RANGE)

1000 0000 0000

0x800 +4095

0111 1111 1111 0

0x7FF +2047 +1.0235V

1000 0000 0001

0x801 +4094

0111 1111 1110 0

0x7FE +2046 +1.0230V

1100 0000 0011

0xC03 +2050

0000 0000 0010 0

0x002 +2 +0.0010V

1100 0000 0001

0xC01 +2049

0000 0000 0001 0

0x001 +1 +0.0005V

1100 0000 0000

0xC00 +2048

0000 0000 0000 0

0x000 0 +0.0000V

0100 0000 0000

0x400 +2047

1111 1111 1111 0

0xFFF -1 -0.0005V

0100 0000 0001

0x401 +2046

1111 1111 1110 0

0xFFE -2 -0.0010V

0000 0000 0001

0x001 +1

1000 0000 0001 0

0x801 -2047 -1.0235V

0000 0000 0000

0x000 0

1000 0000 0000 0

0x800 -2048 -1.0240V

0000 0000 0000

0x000 0

1000 0000 0000 1

0x800 -2048

<-1.0240V

(DATA OUT OF

RANGE)

(

)

Table 2. Output Codes vs. Input Voltage

DAV

D0–D11

REFP

- V

REFN

)

REFN

- V

REFP

)

N + 4

N + 5

N + 6

N - 2

N - 3

DOR

8.5 CLOCK-CYCLE DATA LATENCY

DIFFERENTIAL ANALOG INPUT (INP - INN)

CLKN

CLKP

SETUP

HOLD

DAV

N N + 1 N + 2 N + 3 N + 5 N + 6 N + 7N - 1N - 2N - 3 N + 9N + 8N + 4

N + 1

N + 2

N + 3

N + 7

N + 8

N + 9

N - 1

Figure 5. System Timing Diagram

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 29 30

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