* Product/package combination obsolete; shown for reference only
www.national.com
2
ADC0844/ADC0848
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.
Supply Voltage (V
CC
)
Voltage
Logic Control Inputs
At Other Inputs and Outputs
Input Current at Any Pin (Note 3)
Package Input Current (Note 3)
Storage Temperature
Package Dissipation at T
A
=25°C
ESD Susceptibility (Note 4)
Lead Temperature
(Soldering, 10 seconds)
Dual-In-Line Package (Plastic)
6.5V
−0.3V to +15V
−0.3V to V
CC
+0.3V
5 mA
20 mA
−65°C to +150°C
875 mW
800V
Dual-In-Line Package (Ceramic)
Molded Chip Carrier Package
Vapor Phase (60 seconds)
Infrared (15 seconds)
300°C
215°C
220°C
Operating Conditions
(Notes 1, 2)
Supply Voltage (V
CC
)
Temperature Range
ADC0844CCN, ADC0848BCN,
ADC0848CCN
ADC0844BCJ *, ADC0844CCJ
*,
ADC0848BCV, ADC0848CCV
* Product/package combination obsolete; shown for reference only.
4.5 V
DC
to 6.0 V
DC
0°C
≤
T
A
≤
70°C
T
MIN
≤
T
A
≤
T
MAX
−40°C
≤
T
A
≤
85°C
260°C
Electrical Characteristics
The following specifications apply for V
CC
= 5 V
DC
unless otherwise specified.Boldface
limits apply from T
MIN
to T
MAX
;
all other
limits T
A
= T
j
= 25°C.
ADC0844BCJ
(Note 12)
ADC0844CCJ
(Note 12)
Parameter
Conditions
Typ
(Note 5)
CONVERTER AND MULTIPLEXER CHARACTERISTICS
Maximum Total
Unadjusted Error
ADC0844BCN, ADC0848BCN, BCV
ADC0844CCN, ADC0848CCN, CCV
ADC0844CCJ (Note 12)
Minimum Reference Input Resistance
Maximum Reference Input Resistance
Maximum Common-Mode Input Voltage
Minimum Common-Mode Input Voltage
DC Common-Mode Error
Power Supply Sensitivity
(Note 9)
(Note 9)
Differential Mode
V
CC
=5V±5%
(Note 10)
On Channel=5V,
Off Channel Leakage Current
Off Channel=0V
On Channel=0V,
Off Channel=5V
DIGITAL AND DC CHARACTERISTICS
V
IN(1)
, Logical “1” Input Voltage (Min)
V
IN(0)
, Logical “0” Input Voltage (Max)
I
IN(1)
, Logical “1” Input Current (Max)
I
IN(0)
, Logical “0” Input Current (Max)
V
OUT(1)
, Logical “1” Output Voltage (Min)
V
CC
=5.25V
V
CC
=4.75V
V
IN
=5.0V
V
IN
=0V
V
CC
=4.75V,
I
OUT
=−360 μA
I
OUT
=−10 μA
2.4
4.5
2.8
4.6
2.4
4.5
V
V
0.005
−0.005
2.0
0.8
1
−1
0.005
−0.005
2.0
0.8
2.0
0.8
1
−1
V
V
μA
μA
1
0.1
1
μA
−1
−0.1
−1
μA
±1/16
±1/16
2.4
2.4
±1
1.1
5.9
V
CC
+0.05
GND
−0.05
±¼
±⅛
±1/16
±1/16
2.4
2.4
1.2
5.4
GND
−0.05
±¼
±⅛
1.1
5.9
GND
−0.05
±¼
±⅛
V
REF
=5.00 V
DC
(Note 8)
±½
±1
±½
±1
LSB
LSB
LSB
kΩ
kΩ
V
V
LSB
LSB
Tested
Limit
(Note 6)
ADC0844CCN
ADC0848BCN, ADC0848CCN
ADC0848BCV, ADC0848CCV Limit
Design
Tested
Design Units
Typ
Limit
Limit
Limit
(Note 5)
(Note 7)
(Note 6) (Note 7)
V
CC
+0.05
V
CC
+0.05
3
www.national.com
ADC0844/ADC0848
ADC0844BCJ
(Note 12)
ADC0844CCJ
(Note 12)
Parameter
Conditions
Typ
(Note 5)
Tested
Limit
(Note 6)
ADC0844CCN
ADC0848BCN, ADC0848CCN
ADC0848BCV, ADC0848CCV Limit
Design
Tested
Design Units
Typ
Limit
Limit
Limit
(Note 5)
(Note 7)
(Note 6) (Note 7)
V
V
OUT(0)
, Logical “0” Output Voltage (Max)
I
OUT
, TRI-STATE Output Current (Max)
I
SOURCE
, Output Source Current (Min)
I
SINK
, Output Sink Current (Min)
I
CC
, Supply Current (Max)
V
CC
=4.75V,
I
OUT
=1.6 mA
V
OUT
=0V
V
OUT
=5V
V
OUT
=0V
V
OUT
=V
CC
CS =1, V
REF
Open
−0.01
0.01
−14
16
1
0.4
−3
3
−6.5
8.0
2.5
−0.01
0.01
−14
16
1
0.34
−0.3
0.3
−7.5
9.0
2.3
0.4
−3
3
−6.5
8.0
2.5
V
μA
μA
mA
mA
mA
AC Electrical Characteristics
The following specifications apply for V
CC
= 5V
DC
, t
r
= t
f
= 10 ns unless otherwise specified.
Boldface limits apply from T
MIN
to
T
MAX
;
all other limits T
A
= T
j
= 25°C.
Parameter
t
C
, Maximum Conversion Time (See Graph)
t
W(WR)
, Minimum WR Pulse Width
(Note 11)
t
ACC
, Maximum Access Time (Delay from Falling Edge of RD to
C
L
= 100 pF (Note 11)
Output Data Valid)
t
1H
, t
0H
, TRI-STATE Control (Maximum Delay from Rising Edge
of RD to Hi-Z State)
C
L
= 10 pF, R
L
= 10k
(Note 11)
Conditions
Typ
(Note 5)
30
50
145
125
200
50
0
5
5
400
100
50
Tested
Limit
(Note 6)
40
150
225
200
Design
Limit
(Note 7)
60
Units
μs
ns
ns
ns
ns
ns
ns
pF
pF
t
WI
, t
RI
, Maximum Delay from Falling Edge of WR or RD to Reset
(Note 11)
of INTR
t
DS
, Minimum Data Set-Up Time
t
DH
, Minimum Data Hold Time
C
IN
, Capacitance of Logic Inputs
C
OUT
, Capacitance of Logic Outputs
(Note 11)
(Note 11)
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 (V
IN
) at any pin exceeds the power supply rails (V
IN
< 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 with a 5 mA current limit to four.
Note 4:
Human body model, 100 pF discharged through a 1.5 kΩ resistor.
Note 5:
Typical figures 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 V
IN
(−)
≥
V
IN
(+) 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 V
CC
supply. Be careful during testing at low V
CC
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 V
IN
does not exceed the supply voltage by more than 50 mV, the output code will be correct.
To achieve an absolute 0 V
DC
to 5 V
DC
input voltage range will therefore require a minimum supply voltage of 4.950 V
DC
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.
Note 12:
This product/package combination is obsolete. Shown for reference only.
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