Datasheet

LM96080
www.ti.com SNAS465D –SEPTEMBER 2009–REVISED MARCH 2013
DC Electrical Characteristics
The following specifications apply for +3.0 V
DC
≤ V
+
≤ +5.5 V
DC
, IN0-IN6, R
S
= 25Ω, unless otherwise specified. Boldface
limits apply for T
A
= T
J
= T
MIN
to T
MAX
; all other limits T
A
= T
J
= 25°C.
(1)
Typical
(2)
Limits
(3)
Units
Symbol Parameter Conditions
(Limits)
POWER SUPPLY CHARACTERISTICS
V
+
Supply Voltage +3.3 +3.0 V (min)
+5.0 +5.5 V(max)
I
+
Supply Current (Interface Inactive). (See SUPPLY Round robin conversion, V
+
= 0.430 0.580 mA (max)
CURRENT (I
+
) for the I
+
equation). 5.5V
Round robin conversion, V
+
= 0.370 0.520 mA (max)
3.8V
Shutdown mode, V
+
= 5.5V 0.400 0.540 mA (max)
Shutdown mode, V
+
= 3.8V 0.330 0.480 mA (max)
TEMPERATURE-to-DIGITAL CONVERTER CHARACTERISTICS
Temperature Error (−40)°C ≤ T
A
≤ +125°C ±3 °C (max)
(−25)°C ≤ T
A
≤ +100°C ±2 °C (max)
Resolution 0.0625 °C (min)
ANALOG-to-DIGITAL CONVERTER CHARACTERISTICS
n Resolution (10 bits with full-scale at 2.56V) 2.5 mV
TUE Total Unadjusted Error See
(4)
±1 % (max)
DNL Differential Non-Linearity See
(5)
±1 LSb (max)
PSS Power Supply Sensitivity ±0.05 % / V
t
C
Total Monitoring Cycle Time See
(6)
662 ms (min)
728
810 ms (max)
MULTIPLEXER/ADC INPUT CHARACTERISTICS
R
ON
On Resistance 2 10 kΩ (max)
I
ON
Input Current (On Channel Leakage Current) ±0.005 μA
I
OFF
Off Channel Leakage Current ±0.005 μA
FAN RPM-to-DIGITAL CONVERTER
Fan RPM Error (–40)°C ≤ T
A
≤ +125°C ±10 % (max)
Internal Clock Frequency (–40)°C ≤ T
A
≤ +125°C 22.5 20.2 kHz (min)
24.8 kHz (max)
FAN1 and FAN2 Nominal Input Divisor = 1, Fan Count = 153
(7)
8800 RPM
RPM (See FAN INPUTS)
Divisor = 2, Fan Count = 153
(7)
4400 RPM
Divisor = 3, Fan Count = 153
(7)
2200 RPM
Divisor = 4, Fan Count = 153
(7)
1100 RPM
Full-scale Count 255 (max)
DIGITAL OUTPUTS: A0/NTEST_OUT, INT
V
OUT(1)
Logical “1” Output Voltage I
OUT
= +5.0 mA at V
+
= +4.5V, 2.4 V (min)
I
OUT
= +3.0 mA at V
+
= +3.0V
V
OUT(0)
Logical “0” Output Voltage I
OUT
= +5.0 mA at V
+
= +4.5V, 0.4 V (max)
I
OUT
= +3.0 mA at V
+
= +3.0V
(1) Each input and output is protected by an ESD structure to GND, as shown in the Pin Descriptions table. Input voltage magnitude up to
0.3V above V
+
or 0.3V below GND will not damage the LM96080. There are parasitic diodes that exist between some inputs and the
power supply rails. Errors in the ADC conversion can occur if these diodes are forward biased by more than 50 mV. As an example, if
V
+
is 4.50 V
DC
, input voltage must be ≤ 4.55 V
DC
, to ensure accurate conversions.
(2) Typicals are at T
J
= T
A
= 25°C and represent most likely parametric norm.
(3) Limits are specified to TI's AOQL (Average Outgoing Quality Level).
(4) TUE (Total Unadjusted Error) includes Offset, Gain and Linearity errors of the ADC.
(5) Limit is Specified by Design.
(6) Total Monitoring Cycle Time includes temperature conversion, 7 analog input voltage conversions and 2 tachometer readings. For more
information on the conversion rates, refer to the description of bit 0, register 07h in REGISTERS AND RAM.
(7) The total fan count is based on 2 pulses per revolution of the fan tachometer output.
Copyright © 2009–2013, Texas Instruments Incorporated Submit Documentation Feedback 7
Product Folder Links: LM96080