Rainbow-electronics MAX1301 Instrukcja Użytkownika Pobierz pdf (Strona 17)

Figure 6. Simplified Analog Input Circuit

MAX1300

MAX1301

SOURCE

ANALOG

SIGNAL

SOURCE

ANALOG

SIGNAL

SOURCE

IN_+

*MINIMIZE R

SOURCE

TO AVOID GAIN ERROR AND DISTORTION.

MAX1300/MAX1301

8-/4-Channel, ±12V Multirange Inputs,

Serial 16-Bit ADCs

______________________________________________________________________________________ 17

SCLK

DIN S C2 C1 C0 0 0 0 0

ANALOG INPUT

TRACK AND HOLD*

TRACK

DOUT

B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0

BYTE 1 BYTE 2 BYTE 3

SSTRB

INTCLK**

HOLD HOLD

ACQ

100ns to 400ns

INTCLK

≈ 4.5MHz

SAMPLE

≈ f

SCLK

/ 24 + f

INTCLK

/ 28

*TRACK AND HOLD TIMING IS CONTROLLED BY INTCLK, AND IS NOT ACCESSIBLE TO THE USER.

**INTCLK IS AN INTERNAL SIGNAL AND IS NOT ACCESSIBLE TO THE USER.

SAMPLING INSTANT

HIGH IMPEDANCE

Figure 4. Internal Clock-Mode Conversion (Mode 2)

ANALOG INPUT VOLTAGE (V)

ANALOG INPUT CURRENT (mA)

9630-3-6-9

-0.6

-0.2

0.2

0.6

1.0

-1.0

-12 12

ALL MODES

Figure 5. Analog Input Current vs. Input Voltage

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 30 31

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