AMC6821-Q1 Datasheet, PDF (3/54 Pages) Texas Instruments – INTELLIGENT TEMPERATURE MONITOR AND PWM FAN CONTROLLER

AMC6821-Q1
www.ti.com ...................................................................................................................................................................................................... SBAS475 – JUNE 2009
ELECTRICAL CHARACTERISTICS
T_A = –40°C to 100°C and V_DD = 3 V or 5 V (unless otherwise noted)
PARAMETER
TEMPERATURE MEASUREMENT
Local sensor accuracy
Remote sensor accuracy⁽¹⁾
Sensor resolution
Conversion time
PWM CONTROLLER
PWM frequency range (programmable)⁽²⁾
PWM frequency accuracy
Duty cycle⁽²⁾
Duty cycle resolution
FAN RPM-TO-DIGITAL CONVERTER
Accuracy
Full-scale count⁽²⁾
Nominal input RPM⁽²⁾
Internal clock frequency for RPM measurement
DIGITAL INPUT/OUTPUT
V_OL Open-drain output low voltage
I_OH Open-drain high-level output leakage current
V_IH Input high voltage
V_IL Input low voltage
I_IH Input high current
I_IL Input low current
Input capacitance
POWER SUPPLY
Current
Power dissipation
CONDITIONS
T_A = 0°C to 90°C
T_A = –25°C to 100°C
T_R = 50°C to 100°C
T_R = –40°C to 125°C
Both channels
Two channels
T_A = 25°C to 100°C
Programmable
8-bit
T_A = 25°C to 100°C
Sink current 6 mA, V_DD = 3 V
V_DD = 5
AMC6821
MIN
TYP
±0.5
±1.0
±0.5
±1.0
0.125
62.5
10
–6
0
0.39
–6
100
100
0
0.1
2.1
–1
5
1.1
5
MAX UNIT
±3.0 °C
±4.0 °C
±3.0 °C
±4.0 °C
°C
ms
40k Hz
+7 %
100 %
%/bit
+7
65535
23000
%
RPM
kHz
0.4 V
1 µA
V
0.8 V
µA
1 µA
pF
2.0 mA
mW
(1) The remote temperature sensor is optimized for the Pentium M™ thermal diode with diode ideality n = 1.0022 and T_A = 0°C to 100°C.
(2) Not production tested. Specified by design.
Copyright © 2009, Texas Instruments Incorporated
Submit Documentation Feedback
3
Product Folder Link(s): AMC6821-Q1