Rainbow-electronics MAX104 Manual do Utilizador descarregar pdf (Página 19)

-10dBm (100mV clock signal amplitude) to +10dBm

(1V clock signal amplitude). The MAX104 dynamic per-

formance specifications are determined by a single-

ended clock drive of +4dBm (500mV clock signal

amplitude). To avoid saturation of the input amplifier

stage, limit the clock power level to a maximum of

+10dBm.

Differential Clock Inputs (Sine-Wave Drive)

The advantages of differential clock drive (Figure 13b,

Table 5) can be obtained by using an appropriate

balun or transformer to convert single-ended sine-wave

sources into differential drives. The precision on-chip,

laser-trimmed 50Ω clock-termination resistors ensure

excellent amplitude matching. Refer to

Single-Ended

Clock Inputs (Sine-Wave Drive)

for proper input ampli-

tude requirements.

Single-Ended Clock Inputs (ECL Drive)

Configure the MAX104 for single-ended ECL clock drive

by connecting the clock inputs as shown in Figure 13c

(Table 5). A well bypassed V

supply (-1.3V) is essen-

tial to avoid coupling noise into the undriven clock input,

which would degrade dynamic performance.

Differential Clock Inputs (ECL Drive)

The MAX104 may be driven from a standard differential

(Figure 13d, Table 5) ECL clock source by setting the

clock termination voltage at CLKCOM to -2V. Bypass

the clock-termination return (CLKCOM) as close as

possible to the ADC with a 0.01µF capacitor connected

to GNDI.

AC-Coupling Clock Inputs

The clock inputs CLK+ and CLK- can also be driven

with positive referenced ECL (PECL) logic if the clock

MAX104

±5V, 1Gsps, 8-Bit ADC with

On-Chip 2.2GHz Track/Hold Amplifier

______________________________________________________________________________________ 19

CLK+

CLK- = 0V

+0.5V

-0.5V

NOTE: CLKCOM = 0V

Figure 13a. Single-Ended Clock Input Signals

CLK+

-0.8V

-1.8V

CLK- = -1.3V

NOTE: CLKCOM = -2V

Figure 13c. Single-Ended ECL Clock Drive

CLK+

CLK-

+0.5V

-0.5V

NOTE: CLKCOM = 0V

Figure 13b. Differential Clock Input Signals

CLK+

CLK-

-0.8V

-1.8V

NOTE: CLKCOM = -2V

Figure 13d. Differential ECL Clock Drive

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 31 32

±5V, 1Gsps, 8-Bit ADC with 1

Comentários a estes Manuais

Sem comentários

Rainbow-electronics MAX104 Manual do Utilizador Página 19

Comentários a estes Manuais

Manuais e produtos relacionados com Sensores Rainbow-electronics MAX104