Rainbow-electronics MAX6690 Manual de usuario descargar pdf (Pagina 15)

Power-Up Defaults:

• Interrupt latch is cleared.

• Address select pins are sampled.

• ADC begins autoconverting at a 0.25Hz rate.

• Command byte is set to 00h to facilitate quick

remote Receive Byte queries.

•T

HIGH

and T

LOW

registers are set to max and min

limits, respectively.

MAX6690

2°C Accurate Remote/Local Temperature

Sensor with SMBus Serial Interface

______________________________________________________________________________________ 15

DATA CONVERSION RATE (Hz)

00h 0.0625

01h 0.125

02h 0.25

03h 0.5

04h 1

05h 2

06h 4

07h 8

08h-FFh Reserved

Table 8. Conversion-Rate Control Byte

ADD0 ADD1 ADDRESS

0 0 0011 000

0 High-Z 0011 001

0 1 0011 010

High-Z 0 0101 001

High-Z High-Z 0101 010

High-Z 1 0101 011

1 0 1001 100

1 High-Z 1001 101

1 1 1001 110

Table 9. Slave Address Decoding (ADD0

and ADD1)

Note: High-Z means that the pin is left unconnected and floating.

Chip Information

TRANSISTOR COUNT: 12,504

PROCESS: BiCMOS

1 2 ... 10 11 12 13 14 15 16

Patents pending 1
ABSOLUTE MAXIMUM RATINGS 2
ELECTRICAL CHARACTERISTICS 2
= +3.3V to +5.5V, T 4
Pin Description 5
Detailed Description 6
ADC and Multiplexer 6
A/D Conversion Sequence 6
Remote-Diode Selection 6
Thermal Mass and Self-Heating 6
Figure 1. Functional Diagram 7
ADC Noise Filtering 8
PC Board Layout 8
PC Board Layout Checklist 9
Low-Power Standby Mode 9
SMBus Digital Interface 9
Alarm Threshold Registers 11
Diode Fault Alarm 11
Address (0001100) 12
Status Byte Functions 13
Conversion Rate Byte 14
Slave Addresses 14
POR and UVLO 14
Chip Information 15
Package Information 16
QSOP.EPS 16

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Rainbow-electronics MAX6690 Manual de usuario Pagina 15

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