MAX6681MEE+ Maxim Integrated Products, MAX6681MEE+ Datasheet - Page 14

• Manufacturer Part Number: MAX6681MEE+
• Description: IC TEMP SENSOR SMBUS 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX6681MEE+

• Function: Thermometer, Thermostat
• Topology: ADC, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -55°C ~ 125°C, External Sensor
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Full Temp Accuracy: +/- 5 C, +/- 3 C
• Digital Output - Bus Interface: Serial (2-Wire)
• Digital Output - Number Of Bits: 10 bit + Sign
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Ic Output Type: Digital
• Sensing Accuracy Range: ± 1°C
• Supply Current: 550µA
• Supply Voltage Range: 3V To 5.5V
• Resolution (bits): 11bit
• Sensor Case Style: QSOP
• No. Of Pins: 16
• Accuracy %: 1°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

autonomous mode (RUN/STOP = 0). This variable rate
control can be used to reduce the supply current in
portable-equipment applications. The conversion rate
byte’s POR state is 02h (0.25Hz). The MAX6680/
MAX6681 use only the 3LSBs of this register. The
5MSBs are “don’t care” and should be set to zero when
possible. The conversion rate tolerance is ±25% at any
rate setting.
±1°C Fail-Safe Remote/Local Temperature
Sensors with SMBus Interface
Table 6. Configuration-Byte Bit Assignment
Table 7. Status Register Bit Assignments
14
7 (MSB)
7 (MSB)
______________________________________________________________________________________
BIT
BIT
6
5
4
3
2
1
0
6
5
4
3
2
1
0
Extended Resolution
LHIGH
RHIGH
NAME
RLOW
LLOW
OPEN
Extended Range
BUSY
SMBus Timeout
OVE
Software Reset
OVI
ALERT MASK
RUN/STOP
NAME
SPNP
RFU
STATE
POR
0
0
0
0
0
0
0
0
POR STATE
0
0
1
0
0
0
0
0
When 1, the A/D is busy converting.
When 1, internal high-temperature alarm has tripped; cleared by POR or readout
of the Status register, if the fault condition no longer exists.
When 1, internal low-temperature alarm has tripped; cleared by POR or readout of
the Status register, if the fault condition no longer exists.
When 1, external high-temperature alarm has tripped; cleared by POR or readout
of the Status register, if the fault condition no longer exists.
When 1, external low-temperature alarm has tripped; cleared by POR or readout of
the Status register if the fault condition no longer exists.
When 1 indicates an external diode open; cleared by POR or readout of the Status
register, if the fault condition no longer exists.
When 1, internal temperature exceeds the RWOI limit.
When 1, external temperature exceeds the RWOE limit.
Mask ALERT active state when 1. When 1, ALERT does not respond to
any fault related to the four limit registers.
Standby mode control bit; if 1, immediately stops converting and enters
standby mode. If zero, it converts in either one-shot or timer mode.
When 1, the remote sensor is a common-collector substrate PNP. When
zero, the remote sensor is a diode-connected transistor.
When zero, remote- and local-sensors’ temperature data are 7 bits +
sign with 1°C resolution. When 1, the remote-sensor temperature data is
10 bits + sign with 0.125°C resolution.
Extended temperature range. 0 = normal, 1 = extended to -64°C.
When set to 1, it disables the SMBus timeout, as well as the alert
response.
Software reset from SMBus from customer.
Reserved
Valid A/D conversion results for both channels are avail-
able one total conversion time (125ms nominal, 156ms
maximum) after initiating a conversion, whether conver-
sion is initiated through the RUN/STOP bit, hardware
STBY pin, One-Shot command, or initial power-up.
The MAX6680/MAX6681 device address can be initially
set to nine different values by pin strapping ADD0 and
ADD1 so that more than one MAX6680/MAX6681 can
FUNCTION
FUNCTION
Slave Addresses