DS75U+T&R Maxim Integrated Products, DS75U+T&R Datasheet - Page 9

• Manufacturer Part Number: DS75U+T&R
• Description: IC THERMOMETER/STAT DIG 8-MSOP
• Manufacturer: Maxim Integrated Products

Specifications of DS75U+T&R

• Function: Thermometer, Thermostat
• Topology: ADC (Sigma Delta), Comparator, Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: No
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Full Temp Accuracy: +/- 3 C
• Digital Output - Bus Interface: Serial (2-Wire)
• Digital Output - Number Of Bits: 12 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

CONFIGURATION REGISTER
The configuration register allows the user to program various DS75 options such as conversion
resolution, thermostat fault tolerance, thermostat polarity, thermostat operating mode, and shutdown
mode. The configuration register is arranged as shown in Figure 5 and detailed descriptions of each bit
are provided in Table 4. The user has read/write access to all bits in the configuration register except the
MSb, which is a reserved read-only bit. The entire register is volatile, and thus powers–up in its default
state.
Figure 5. CONFIGURATION REGISTER
Table 4. CONFIGURATION REGISTER BIT DESCRIPTIONS
Table 5. RESOLUTION CONFIGURATION
0
Reserved
R1
Conversion Resolution Bit 1
R0
Conversion Resolution Bit 0
F1
Thermostat Fault Tolerance Bit 1
F0
Thermostat Fault Tolerance Bit 0
POL
Thermostat Output (O.S.) Polarity
TM
Thermostat Operating Mode
SD
Shutdown
R1
0
0
1
1
R0
1
0
1
0
BIT NAME
THERMOMETER
RESOLUTION
MSb
0
10–bit
11–bit
12–bit
9–bit
bit 6
R1
Power-up state = 0
The master can write to this bit, but it will always read out as a 0.
Power-up state = 0
Sets conversion resolution (see Table 5)
Power-up state = 0
Sets conversion resolution (see Table 5)
Power-up state = 0
Sets the thermostat fault tolerance (see Table 6).
Power-up state = 0
Sets the thermostat fault tolerance (see Table 6).
Power-up state = 0
POL = 0 — O.S. is active low.
POL = 1 — O.S. is active high.
Power-up state = 0
TM = 0 — Comparator mode.
TM = 1 — Interrupt mode.
See the OPERATION–Thermostat section for a detailed description
of these modes.
Power-up state = 0
SD = 0 — Active conversion and thermostat operation.
SD = 1 — Shutdown mode.
See the SHUTDOWN MODE section for a detailed description of
this mode.
bit 5
R0
MAX CONVERSION
bit 4
F1
1200 ms
150 ms
300 ms
600 ms
TIME
9 of 14
FUNCTIONAL DESCRIPTION
bit 3
F0
POL
bit 2
bit 1
TM
LSb
SD
DS75