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ADC0844CCN 数据表(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 ADC0844CCN
功能描述  8-Bit uP Compatible A/D Converters with Multiplexer Options
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

ADC0844CCN 数据表(HTML) 4 Page - National Semiconductor (TI)

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Electrical Characteristics (Continued)
The following specifications apply for V
CC = 5VDC unless otherwise specified.Boldface limits apply from TMIN to TMAX; all
other limits T
A = Tj = 25˚C.
Parameter
Conditions
ADC0844BCJ
ADC0844CCJ
ADC0844CCN
ADC0848BCN, ADC0848CCN
ADC0848BCV, ADC0848CCV
Limit
Units
Typ
Tested
Design
Typ
Tested
Design
(Note 5)
Limit
Limit
(Note 5)
Limit
Limit
(Note 6)
(Note 7)
(Note 6)
(Note 7)
DIGITAL AND DC CHARACTERISTICS
VOUT(0), Logical “0”
VCC=4.75V
0.4
0.34
0.4
V
Output Voltage (Max)
IOUT=1.6 mA
IOUT, TRI-STATE Output
VOUT=0V
−0.01
−3
−0.01
−0.3
−3
µA
Current (Max)
VOUT=5V
0.01
3
0.01
0.3
3
µA
ISOURCE, Output Source
VOUT=0V
−14
−6.5
−14
−7.5
−6.5
mA
Current (Min)
ISINK, Output Sink
VOUT=VCC
16
8.0
16
9.0
8.0
mA
Current (Min)
ICC, Supply Current (Max)
CS =1, VREF
Open
1
2.5
1
2.3
2.5
mA
AC Electrical Characteristics
The following specifications apply for V
CC = 5VDC,tr = tf = 10 ns unless otherwise specified. Boldface limits apply from TMIN
to T
MAX; all other limits TA = Tj = 25˚C.
Tested
Design
Parameter
Conditions
Typ
Limit
Limit
Units
(Note 5)
(Note 6)
(Note 7)
t
C, Maximum Conversion Time (See Graph)
30
40
60
µs
t
W(WR), Minimum WR Pulse Width
(Note 11)
50
150
ns
t
ACC, Maximum Access Time (Delay from Falling Edge of
C
L = 100 pF
145
225
ns
RD to Output Data Valid)
(Note 11)
t
1H,t0H, TRI-STATE Control (Maximum Delay from Rising
C
L = 10 pF, RL = 10k
125
200
ns
Edge of RD to Hi-Z State)
(Note 11)
t
WI,tRI, Maximum Delay from Falling Edge of WR or RD to
(Note 11)
200
400
ns
Reset of INTR
t
DS, Minimum Data Set-Up Time
(Note 11)
50
100
ns
t
DH, Minimum Data Hold Time
(Note 11)
0
50
ns
C
IN, Capacitance of Logic Inputs
5
pF
C
OUT, Capacitance of Logic Outputs
5
pF
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating
the device beyond its specified operating conditions.
Note 2: All voltages are measured with respect to the ground pins.
Note 3: When the input voltage (VIN) at any pin exceeds the power supply rails (VIN < V
or V
IN > V
+) the absolute value of the current at that pin should be limited
to 5 mA or less. The 20 mA package input current limits the number of pins that can exceed the power supply boundaries witha5mA current limit to four.
Note 4: Human body model, 100 pF discharged through a 1.5 k
Ω resistor.
Note 5: Typicals are at 25˚C and represent most likely parametric norm.
Note 6: Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 7: Design limits are guaranteed by not 100% tested. These limits are not used to calculate outgoing quality levels.
Note 8: Total unadjusted error includes offset, full-scale, linearity, and multiplexer error.
Note 9: For VIN (−) ≥ VIN(+) the digital output code will be 0000 0000. Two on-chip diodes are tied to each analog input, which will forward-conduct for analog input
voltages one diode drop below ground or one diode drop greater than VCC supply. Be careful during testing at low VCC levels (4.5V), as high level analog inputs (5V)
can cause this input diode to conduct, especially at elevated temperatures, and cause errors for analog inputs near full-scale. The spec allows 50 mV forward bias
of either diode. This means that as long as the analog VIN does not exceed the supply voltage by more than 50 mV, the output code will be correct. To achieve an
absolute 0 VDC to5VDC input voltage range will therefore require a minimum supply voltage of 4.950 VDC over temperature variations, initial tolerance and loading.
Note 10: Off channel leakage current is measured after the channel selection.
Note 11: The temperature coefficient is 0.3%/˚C.
www.national.com
4


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