DS1780E Maxim Integrated Products, DS1780E Datasheet - Page 24

• Manufacturer Part Number: DS1780E
• Description: IC CPU PERIPHERAL MON 24-TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of DS1780E

• Function: Thermal Monitor, CPU Peripherals
• Topology: ADC (Sigma Delta), Comparator, Fan Speed Control, Register Bank
• Sensor Type: Internal
• Sensing Temperature: -40°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 2.8 V ~ 5.75 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Full Temp Accuracy: +/- 12 %
• Digital Output - Bus Interface: Serial (2-Wire)
• Digital Output - Number Of Bits: 8 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

DC ELECTRICAL CHARACTERISTICS:
Fan RPM-to-Digital Converter
DC ELECTRICAL CHARACTERISTICS:
Analog Output V
DC ELECTRICAL CHARACTERISTICS:
Digital Outputs: A0NT
Accuracy
Full scale count
FAN1 & FAN2
Normal Input RPM
Internal Oscillator
Frequency
DAC Resolution
Voltage Range
Error
Output Current
Load Capacitance
Logical “1”
Output Voltage
Logical “0”
Output Voltage
PARAMETER
PARAMETER
PARAMETER
OUT
SYMBOL
SYMBOL
SYMBOL
DAC
V
V
C
OUT
OUT
I
LOAD
OUT
OUT
ERR
(1)
(0)
Divisor=1; Fan
Divisor=2; Fan
Divisor=4; Fan
Divisor=8; Fan
I
I
I
I
CONDITION
CONDITION
CONDITION
OUT
OUT
OUT
OUT
V
V
V
V
Count=153
Count=153
Count=153
Count=153
+25°C£TA
-40°C£TA
£+125°C
0°C£TA
DD
DD
DD
DD
£+75°C
£100°C
=±5 mA at
=±3 mA at
=±5 mA at
=±3 mA at
=4.25V
=2.85V
=5.75V
=3.45V
24 of 28
(-40°C to +125°C, 2.8V £ V
(-40°C to +125°C, 2.8V £ V
(-40°C to +125°C, 2.8V £ V
21.15
MIN
MIN
MIN
2.4
0
TYP
8800
4400
2200
1100
TYP
TYP
22.5
MAX
MAX
MAX
23.85
1.25
±12
255
100
2.0
0.4
±6
±5
8
decimal
UNITS
UNITS
UNITS
RPM
% of
FSR
kHz
mA
bits
pF
%
V
V
V
DD
DD
DD
£ 5.75V)
£ 5.75V)
£ 5.75V)
NOTES
NOTES
NOTES
8