ADC0808S125HW(2008) 데이터 시트보기 (PDF) - NXP Semiconductors.

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ADC0808S125HW
(Rev.:2008)

Single 8-bit ADC, up to 125 MHz or 250 MHz

NXP Semiconductors. 

NXP Semiconductors

ADC0808S125/250

Single 8-bit ADC, up to 125 MHz or 250 MHz

Table 3. Pin type description

Type

Description

I

input

O

output

I(CMOS)

1.8 V CMOS level input

O(CMOS)

1.8 V CMOS level output

P

power supply

G

ground

7. Functional description

7.1 CMOS/LVDS clock input

The circuit has two clock inputs CLK+ and CLK−, with two modes of operation:

• LVDS mode: CLK+ and CLK− inputs are at differential LVDS levels. An external

resistor of between 80 Ω and 120 Ω is required; see Figure 3.

VO(dif)

undefined state

maximum Vidth

minimum Vidth

LVDS

DRIVER

RECEIVER

CLK+

Vgpd

CLK−

001aah720

Fig 3. LVDS clock input

• 1.8 V CMOS mode: CLK+ input is at 1.8 V CMOS level and sampling is done on the

rising edge of the clock input signal. In this case pin CLK− must be grounded;

see Figure 4.

CMOS

DRIVER

CLK+

CLK−

Fig 4. CMOS clock input

001aai272

ADC0808S125_ADC0808S250_2

Product data sheet

Rev. 02 — 7 October 2008

© NXP B.V. 2008. All rights reserved.

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