AD9048TQ/833B 데이터 시트보기 (PDF) - Analog Devices

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AD9048TQ/833B

Monolithic 8-Bit Video A/D Converter

Analog Devices 

AD9048

Mnemonic

D1–D8

AGND

DGND

VCC

VEE

CONVERT

PIN FUNCTION DESCRIPTIONS

Description

Mnemonic Description

Eight Digital Outputs. D1 (MSB) is the most

significant bit of the digital output word;

D8 (LSB) is the least significant bit.

One of Two Analog Ground Returns. Both

grounds should be connected together and to

low impedance ground plane near the AD9048.

One of Two Digital Ground Returns. Both

grounds should be connected together and to

low impedance ground plane near the AD9048.

Positive Supply Terminals; Nominally 5.0 V

Negative Supply Terminals; Nominally –5.2 V

Input for Conversion Signal. Sample of analog

input signal taken on rising edge of this pulse.

RB

RM

RT

VIN

NMINV

NLINV

Most Negative Reference Voltage for Internal

Reference Ladder

Midpoint Tap on Internal Reference Ladder

Most Positive Reference Voltage for Internal

Reference Ladder

Analog Input Signal Pin

“Not Most Significant Bit Invert.” In normal

operation, this pin floats high; logic LOW at

NMINV inverts most significant bit of digital

output word [D1 (MSB)].

“Not Least Significant Bit Invert.” In normal

operation, this pin floats high; logic LOW at

NLINV inverts the seven least significant bits

of the digital output word.

–5.2V

0.1␮F

+5.0V

0.1␮F

AD1

AD2

–2.0V

100⍀

510⍀

VEE

VCC

VIN

(MSB) D1

D2

D3

CONVERT

D4

AD9048 D5

RB

D6

D7

RT

DIGITAL

GROUND

(LSB) D8

ANALOG

GROUND

1k⍀

LOAD

RESISTORS

ALL RESISTORS ؎5%

ALL CAPACITORS ؎20%

ALL SUPPLY VOLTAGES ؎5%

OPTION #1 (STATIC): AD1 = –2.0V; AD2 = +2.4V

OPTION #2 (DYNAMIC): SEE WAVEFORMS

AD1

640␮s

0V

–2.0V

AD2

VIH

VIL

5␮s

Figure 2. Burn-In Diagram

REV. F

–5–

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