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MAX6694TE9A+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
MAX6694
5-Channel Precision Temperature Monitor
with Beta Compensation
4 _______________________________________________________________________________________
Note 2: All parameters are tested at T
A
= +85°C. Specifications over temperature are guaranteed by design.
Note 3: Beta = 0.5 for channel 1 remote transistor.
Note 4: Timing specifications are guaranteed by design.
Note 5: The serial interface resets when SMBCLK is low for more than t
TIMEOUT
.
Note 6: A transition must internally provide at least a hold time to bridge the undefined region (300ns max) of SMBCLK’s falling edge.
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, V
STBY
= V
CC
, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V
CC
= +3.3V and T
A
=
+25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
f
SMBCLK
= 100kHz 250
Data Setup Time t
SU:DAT
f
SMBCLK
= 400kHz 100
ns
f
SMBCLK
= 100kHz 1
Receive SMBCLK/SMBDATA Rise
Time
t
R
f
SMBCLK
= 400kHz 0.3
µs
Receive SMBCLK/SMBDATA Fall
Time
t
F
300 ns
Pulse Width of Spike Suppressed t
SP
050ns
SMBus Timeout t
TIMEOUT
SMBDATA low period for interface reset 25 37 45 ms
MAX6694
5-Channel Precision Temperature Monitor
with Beta Compensation
_______________________________________________________________________________________ 5
Typical Operating Characteristics
(V
CC
= 3.3V, V
STBY
= V
CC
, T
A
= +25°C, unless otherwise noted.)
SOFTWARE STANDBY SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX6694 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
3.53.43.1 3.2 3.3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.0
3.0 3.6
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX6694 toc02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
3.43.2
400
450
500
550
600
650
350
3.0 3.6
LOW BETA DIODE CONNECTED TO
CHANNEL 1 WITH RESISTANCE
CANCELLATION AND LOW BETA
05025 75 100 125
REMOTE-DIODE TEMPERATURE ERROR
vs. REMOTE-DIODE TEMPERATURE
MAX6694 toc03
TEMPERATURE (°C)
TEMPERATURE ERROR (°C)
-4
-3
-2
-1
0
1
2
3
4
5
-5
CHANNEL 2
CHANNEL 1
-3
-2
-1
0
1
2
3
4
0 255075100125
LOCAL TEMPERATURE ERROR
vs. DIE TEMPERATURE
MAX6694 toc04
DIE TEMPERATURE (°C)
TEMPERATURE ERROR (°C)
REMOTE-DIODE TEMPERATURE ERROR
vs. POWER-SUPPLY NOISE FREQUENCY
MAX6694 toc05
FREQUENCY (MHz)
TEMPERATURE ERROR (°C)
-4
-3
-2
-1
0
1
2
3
4
5
-5
1.0000.1000.0100.001 10.000
100mV
P-P
CHANNEL 2
CHANNEL 1
LOCAL TEMPERATURE ERROR
vs. POWER-SUPPLY NOISE FREQUENCY
MAX6694 toc06
FREQUENCY (MHz)
TEMPERATURE ERROR (°C)
-4
-3
-2
-1
0
1
2
3
4
5
-5
1.0000.1000.0100.001 10.000
100mV
P-P
CH 2 REMOTE-DIODE TEMPERATURE ERROR
vs. COMMON-MODE NOISE FREQUENCY
MAX6694 toc07
FREQUENCY (MHz)
TEMPERATURE ERROR (°C)
1.00.1 10.0
-4
-3
-2
-1
0
1
2
3
4
-5
100mV
P-P
CH 1 REMOTE-DIODE TEMPERATURE
ERROR vs. CAPACITANCE
MAX6694 toc08
CAPACITANCE (nF)
TEMPERATURE ERROR (°C)
10
-4
-3
-2
-1
0
1
2
3
4
5
-5
1100
CH 2 REMOTE-DIODE TEMPERATURE
ERROR vs. CAPACITANCE
MAX6694 toc09
CAPACITANCE (nF)
TEMPERATURE ERROR (°C)
10
-4
-3
-2
-1
0
1
2
3
4
5
-5
1100
MAX6694
5-Channel Precision Temperature Monitor
with Beta Compensation
6 _______________________________________________________________________________________
Pin Description
PIN
TSSOP TQFN-EP
NAME FUNCTION
1 15 DXP1
Combined Current Source and A/D Positive Input for Channel 1 Remote Transistor.
Connect to the emitter of a low beta transistor. Leave unconnected or connect to V
CC
if
no remote transistor is used. Place a 100pF capacitor between DXP1 and DXN1 for
noise filtering.
2 16 DXN1
Base Input for Channel 1 Remote Diode. Connect to the base of a pnp temperature-
sensing transistor.
3 1 DXP2
Combined Current Source and A/D Positive Input for Channel 2 Remote Diode. Connect
to the anode of a remote-diode-connected temperature-sensing transistor. Leave
unconnected or connect to V
CC
if no remote diode is used. Place a 100pF capacitor
between DXP2 and DXN2 for noise filtering.
4 2 DXN2
Cathode Input for Channel 2 Remote Diode. Connect the cathode of the channel 2
remote-diode-connected transistor to DXN2.
5 3 DXP3
Combined Current Source and A/D Positive Input for Channel 3 Remote Diode. Connect
to the anode of a remote-diode-connected temperature-sensing transistor. Leave
unconnected or connect to V
CC
if no remote diode is used. Place a 100pF capacitor
between DXP3 and DXN3 for noise filtering.
6 4 DXN3
Cathode Input for Channel 3 Remote Diode. Connect the cathode of the channel 3
remote-diode-connected transistor to DXN3.
7 5 DXP4
Combined Current Source and A/D Positive Input for Channel 4 Remote Diode. Connect
to the anode of a remote-diode-connected temperature-sensing transistor. Leave
unconnected or connect to V
CC
if no remote diode is used. Place a 100pF capacitor
between DXP4 and DXN4 for noise filtering.
8 6 DXN4
Cathode Input for Channel 4 Remote Diode. Connect the cathode of the channel 4
remote-diode-connected transistor to DXN4.
97STBY
Active-Low Standby Input. Drive STBY low to place the MAX6694 in standby mode, or
high for operate mode. Temperature and threshold data are retained in standby mode.
10 8 N.C. No Connection. Must be connected to ground.
11 9 OVERT
Overtemperature Active-Low, Open-Drain Output. OVERT asserts low when the
temperature of channels 1 and 4 exceeds the programmed threshold limit.
12 10 V
CC
Supply Voltage Input. Bypass to GND with a 0.1µF capacitor.
13 11 ALERT
SMBus Alert (Interrupt), Active-Low, Open-Drain Output. ALERT asserts low when the
temperature of any channel exceeds the programmed ALERT threshold.
14 12 SMBDATA SMBus Serial Data Input/Output. Connect to a pullup resistor.
15 13 SMBCLK SMBus Serial Clock Input. Connect to a pullup resistor.
16 14 GND Ground
—— EP
Exposed Pad. Connect to a large ground plane to maximize thermal performance. Not
intended as an electrical connection point. (TQFN package only).
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

MAX6694TE9A+T

Mfr. #:
Buy MAX6694TE9A+T
Manufacturer:
Maxim Integrated
Description:
Board Mount Temperature Sensors 5Ch Precision Temperature Monito
Lifecycle:
New from this manufacturer.
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