Rainbow-electronics MAX1204 Manual de usuario descargar pdf (Pagina 20)

MAX1204

5V, 8-Channel, Serial, 10-Bit ADC

with 3V Digital Interface

20 ______________________________________________________________________________________

+5V

510k

100k

24k

0.01µF

REFADJ

MAX1204

Figure 17. Reference-Adjust Circuit

+5V

-5V +3V

GND

SUPPLIES

DGND+3VVLV

GNDV

DIGITAL

CIRCUITRY

MAX1204

R* = 10Ω

*OPTIONAL

Figure 18. Power-Supply Grounding Connection

Figure 15. Unipolar Transfer Function, 4.096V = Full Scale

OUTPUT CODE

FULL-SCALE

TRANSITION

11 . . . 111

11 . . . 110

11 . . . 101

00 . . . 011

00 . . . 010

00 . . . 001

00 . . . 000

123

FS - 3/2LSB

FS = +4.096V

1LSB =

FS

1024



INPUT VOLTAGE (LSBs)

Figure 16. Bipolar Transfer Function, ±4.096V/2 = Full Scale

011 . . . 111

OUTPUT CODE

011 . . . 110

000 . . . 010

000 . . . 001

000 . . . 000

111 . . . 111

111 . . . 110

111 . . . 101

100 . . . 001

100 . . . 000

-FS

INPUT VOLTAGE (LSBs)

+FS - 1LSB

FS =

+4.096V

1LSB =

+4.096V

1024

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

19-1179; Rev 0; 1/97 1
ABSOLUTE MAXIMUM RATINGS 2
ELECTRICAL CHARACTERISTICS 2
TIMING CHARACTERISTICS 6
MAX1204 TOC03 7
Pseudo-Differential Input 8
Track/Hold 9
Input Bandwidth 10
Quick Look 10
How to Start a Conversion 10
Table 2. Control-Byte Format 11
Simple Software Interface 12
Data Framing 14
Power-Down 15
Power-On Reset 15
Reference-Buffer Compensation 15
Clock Mode 16
Compensation Mode 16
Power-Down Sequencing 17
Internal Reference 18
External Reference 18
Layout, Grounding, Bypassing 19
TMS320LC3x 21
TRANSISTOR COUNT: 2503 22
SUBSTRATE CONNECTED TO V 22
20-PIN PLASTIC 23
DUAL-IN-LINE 23
20-PIN CERAMIC 24

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Rainbow-electronics MAX1204 Manual de usuario Pagina 20

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