Rainbow-electronics MAX1444 Manual do Utilizador descarregar pdf (Página 9)

MAX1444

10-Bit, 40Msps, +3.0V, Low-Power

ADC with Internal Reference

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Pin Description

PIN NAME FUNCTION

1 REFN

Lower Reference. Conversion range is ±(V

REFP

- V

REFN

Bypass to GND with a > 0.1µF capacitor.

2 COM Common-Mode Voltage Output. Bypass to GND with a >0.1µF capacitor.

3, 9, 10 V

Analog Supply Voltage. Bypass to GND with a capacitor combination of 2.2µF in parallel

with 0.1µF.

4, 5, 8, 11, 14, 30 GND Analog Ground

6 IN+ Positive Analog Input. For single-ended operation, connect signal source to IN+.

7 IN- Negative Analog Input. For single-ended operation, connect IN- to COM.

12 CLK Conversion Clock Input

13 PD Power Down Input. High: Power-down mode. Low: Normal operation.

15 OE Output Enable Input. High: Digital outputs disabled. Low: Digital outputs enabled.

16–20 D9–D5 Three-State Digital Outputs D9–D5. D9 is the MSB.

21 OV

Output Driver Supply Voltage. Bypass to GND with a capacitor combination of 2.2µF in

parallel with 0.1µF.

22 T.P. Test Point. Do not connect.

23 OGND Output Driver Ground

24–28 D4–D0 Three-State Digital Outputs D4–D0. D0 is the LSB.

29 REFOUT

Internal Reference Voltage Output. May be connected to REFIN through a resistor or a

resistor-divider.

31 REFIN Reference Input. V

REFIN

= 2 × (V

REFP

- V

REFN

). Bypass to GND with a >0.1µF capacitor.

32 REFP

Upper Reference. Conversion range is ±(V

REFP

- V

REFN

). Bypass to GND with a >0.1µF

capacitor.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 17 18

ADC with Internal Reference 1

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