MAX100 데이터 시트보기 (PDF) - Maxim Integrated

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MAX100

250Msps, 8-Bit ADC with Track/Hold

Maxim Integrated 

250Msps, 8-Bit ADC with Track/Hold

_________________________________________________Pin Description (continued)

PIN

52

53

54

55

65

66

68

72, 73

75, 76

NAME

VACTS

VACT

VARBS

VARB

TP3

TP2

TP1

AIN+

AIN-

FUNCTION

Reference Bias Resistor Center-Tap Sense (Note 12)

Reference Bias Resistor Center Tap (Note 12)

Negative Reference Voltage Sense (Note 11)

Negative Reference Voltage Input (Note 11)

Internal node. Do not connect.

Internal node. Do not connect.

Internal connection. This pin must be connected to GND.

Analog Inputs, internally terminated with 50Ω to ground. Full-scale linear input range is approximately

±270mV. Drive AIN+ and AIN- differentially for best high-frequency performance.

Note 10:

Note 11:

Note 12:

Use a multilayer board with a separate layer dedicated to ground. Connect GND and DGND in separate areas in the

ground plane (separated by at least 1/4 inch) and at only one location on the board (see Typical Operating Circuit).

Reference bias supply. Use a separate high-quality supply for these pins. Carefully bypassing these pins to achieve

noise-free operation of the reference supplies contributes directly to high ADC accuracy.

The center-tap connection of the MAX100 is normally left open. It can be driven with a bias voltage, but should be

bypassed carefully (refer to Note 11).

CLK

CLK

DCLK

DCLK

AData

BData

tpd1

tpwl

tpd2

tpwh

Figure 1. Output Timing: Divide-by-1 Mode (DIV = 0)

8 _______________________________________________________________________________________

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