Datasheet

MAX6693
7-Channel Precision Temperature Monitor
with Beta Compensation
8 _______________________________________________________________________________________
Operating-Current Calculation
The MAX6693 operates at different operating-current
levels depending on how many external channels are in
use. Assume that I
CC1
is the operating current when
the MAX6693 is converting the remote channel 1 and
I
CC2
is the operating current when the MAX6693 is con-
verting the other channels. For the MAX6693 with
remote channel 1 and n other remote channels con-
nected, the operating current is:
I
CC
= (2 x I
CC1
+ I
CC2
+ n x I
CC2
)/(n + 3)
SMBus Digital Interface
From a software perspective, the MAX6693 appears as
a series of 8-bit registers that contain temperature mea-
surement data, alarm threshold values, and control bits.
A standard SMBus-compatible, 2-wire serial interface is
used to read temperature data and write control bits
and alarm threshold data. The same SMBus slave
address also provides access to all functions.
Figure 1. Internal Block Diagram
DXP1
DXN1
DXP2
DXN2
DXP3
DXN3
DXP4
DXN4
DXP5
DXN5
DXP6
DXN6
INPUT
BUFFER
CURRENT
SOURCES,
BETA
COMPEN-
SATION
AND MUX
V
CC
REF
ADC
COMMAND BYTE
REMOTE TEMPERATURES
LOCAL TEMPERATURES
REGISTER BANK
ALERT THRESHOLD
OVERT THRESHOLD
ALERT RESPONSE ADDRESS
ALARM
ALU
SMBus
INTERFACE
MAX6693
SMBCLK SMBDATA
OVERT
ALERT
STBY