adc128d818cimtx National Semiconductor Corporation, adc128d818cimtx Datasheet - Page 8

• Manufacturer Part Number: adc128d818cimtx
• Description: 12-bit, 8-channel, Adc System Monitor With Temperature Sensor, Internal/external Reference, And I2c Interface
• Manufacturer: National Semiconductor Corporation

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SERIAL BUS TIMING CHARACTERISTICS
Symbol
t
TIMEOUT
13.0 AC Electrical Characteristics
The following specifications apply for +3.0 V
= T
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed
specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test
conditions.
Note 2: All voltages are measured with respect to GND, unless otherwise specified.
Note 3: If the input voltage at any pin exceeds the power supply ( that is, VIN < GND or VIN > V
at that pin should be limited to 5mA. The 30 mA maximum package input current rating limits the number of pins that can safely exceed the power supply with
an input current of 5mA to six pins. Parasitic components and/or ESD protection circuitry are shown in the Pin Descriptions table.
Note 4: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
allowable power dissipation at any temperature is P
Note 5: For the given θ
Note 6: Human body model (HBM) is a charged 100pF capacitor discharged into a 1.5kΩ resistor. Machine model (MM) is a charged 200pF capacitor discharged
directly into each pin. Charged Device Model (CDM) simulates a pin slowly acquiring charge (such as from a device sliding down the feeder in an automated
assembler) then rapidly being discharged.
Note 7: 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
0.3V below GND will not damage the ADC128D818. There are 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 50mV. As an example, if V
conversions.
Note 8: Typicals are at T
Note 9: Limits are guaranteed to National's AOQL (Average Outgoing Quality Level).
Note 10: Limit is guaranteed by characterization.
Note 11: TUE (Total Unadjusted Error) includes Offset, Gain and Linearity errors of the ADC.
Note 12: The range is up to 7/8 of full scale.
Note 13: Limit is guaranteed by design.
Note 14: Timing specifications are tested at the Serial Bus Input logic levels: V
and SDA edge rates are similar.
——
t
t
t
t
t
1
2
3
4
5
MIN
to T
SCL (Clock) Period
Data In Setup Time to SCL High
Data Out Stable After SCL Low
SDA Low Setup Time to SCL Low (start)
SDA High Hold Time After SCL High (stop)
SCL or SDA time low for I
MAX
; all other limits T
JA
J
, the device is on a 2-layer printed circuit board with 1 oz. copper foil and no airflow.
= T
A
= 25°C and represent most likely parametric norm.
Parameter
A
= T
2
C bus reset
J
= 25°C.
D
= (T
FIGURE 1. Serial Bus Timing Diagram
DC
JMAX
≤
V
− T
+
≤
A
) / θ
+5.5 V
JA
.
DC
Conditions
IN(0)
8
, unless otherwise specified. Boldface limits apply for T
= 0.3 × V
+
is 4.50 V
+
for a falling edge and V
DC
+
) but is less than the absolute maximum ratings, then the current
, INx (where 0
(Note
Min
100
100
100
2.5
JMAX
25
0
9)
, θ
JA
≤
and the ambient temperature, T
x
(Note
≤
Typical
IN(1)
7) must be
= 0.7 × V
8)
≤
+
4.55 V
for a rising edge if the SCL
(Note
Max
100
35
DC
30096326
9)
to ensure accurate
A
. The maximum
A
Units
= T
ms
µs
ns
ns
ns
ns
+
J
or