ADC0808S125 Просмотр технического описания (PDF) - Integrated Device Technology

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ADC0808S125

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

Integrated Device Technology 

Integrated Device Technology

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  and 120  is required; see Figure 3.

VO(dif)

undefined state

maximum Vidth

minimum Vidth

LVDS

DRIVER

RECEIVER

CLK+

CLK−

Vgpd

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_4

Product data sheet

Rev. 04 — 2 July 2012

© IDT 2012. All rights reserved.

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