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LM78 Datasheet(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM78
Description  Microprocessor System Hardware Monitor
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LM78 Datasheet(HTML) 5 Page - National Semiconductor (TI)

 
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Absolute Maximum Ratings (Notes 1, 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Positive Supply Voltage (V
CC)
6.5V
Voltage on Any Input or Output Pin
−0.3V to (V
CC+0.3V)
Ground Difference (GNDD–GNDA)
±300 mV
Input Current at any Pin (Note 3)
±5mA
Package Input Current (Note 3)
±20 mA
Maximum Junction Temperature
(T
J max)
150˚C
ESD Susceptibility(Note 5)
Human Body Model
2000V
Machine Model
175V
Soldering Information
PQFP Package (Note 6) :
Vapor Phase (60 seconds)
215˚C
Infrared (15 seconds)
220˚C
Storage Temperature
−65˚C to +150˚C
Operating Ratings(Notes 1, 2)
Operating Temperature Range
T
MIN ≤ TA ≤ TMAX
LM78
−55˚C
≤ T
A ≤ +125˚C
Specified Temperature Range
T
MIN ≤ TA ≤ TMAX
LM78
−10˚C
≤ T
A ≤ +100˚C
Junction to Ambient Thermal Resistance (
θ
JA(Note 4) )
NS Package ID: VGZ44A
62˚C/W
Supply Voltage (V
CC)
+4.25V to +5.75V
Ground Difference
(IGNDD–GNDAI)
≤100 mV
V
IN Voltage Range
−0.05V to V
CC + 0.05V
DC Electrical Characteristics(Note 7)
The following specifications apply for +4.25 V
DC ≤VCC ≤ +5.75 VDC,fSYSCLK = 8.33 MHz, RS =25Ω, unless otherwise speci-
fied. Boldface limits apply for T
A =TJ =TMIN to TMAX; all other limits TA =TJ = 25˚C.
Symbol
Parameter
Conditions
Typical
Limits
Units
(Note 8)
(Note 9)
(Limits)
POWER SUPPLY CHARACTERISTICS
I
CC
Supply Current
Interface Inactive
1.0
2
mA (max)
Shutdown Mode
10
µA
TEMPERATURE-TO-DIGITAL CONVERTER CHARACTERISTICS
Accuracy
−10˚C
≤ T
A ≤ +100˚C
±3
˚C (max)
Resolution
1
˚C (min)
ANALOG-TO-DIGITAL CONVERTER CHARACTERISTICS
Resolution (8 bits with full-scale at 4.096V)
16
mV
TUE
Total Unadjusted Error
(Note 10)
±1
% (max)
DNL
Differential Non-Linearity
±1
LSB
PSS
Power Supply Sensitivity
±1
%/V
t
C
Total Monitoring Cycle Time
(Note 11)
1.0
1.5
sec (max)
OP AMP CHARACTERISTICS
Output Current (Sourcing)
50
µA
Input Offset Voltage
I
OUT =50 µA
±1mV
Input Bias Current
±0.1
nA
PSRR
60
dB
DC Open Loop Gain
70
dB
Gain Bandwidth Product
500
kHz
MULTIPLEXER/ADC INPUT CHARACTERISTICS
On Resistance
400
2000
Ω (max)
Off Channel Leakage Current
±0.1
nA
Input Current (On Channel Leakage Current)
±0.1
nA
FAN RPM-TO-DIGITAL CONVERTER
Accuracy
+25˚C
≤ T
A ≤ +75˚C
±10
% (max)
−10˚C
≤ T
A ≤ +100˚C
±15
% (max)
Full-scale Count
255
(max)
www.national.com
5


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