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ADC0816,ADC0817
ADC0816/ADC0817 8-Bit P Compatible A/D Converters with 16-Channel
Multiplexer
Literature Number: SNAS527B
ADC0816/ADC0817 8-Bit
μP
Compatible A/D Converters with 16-Channel Multiplexer
March 2007
ADC0816/ADC0817
8-Bit
μP
Compatible A/D Converters
with 16-Channel Multiplexer
General Description
The ADC0816, ADC0817 data acquisition component is a
monolithic CMOS device with an 8-bit analog-to-digital con-
verter, 16-channel multiplexer and microprocessor compati-
ble control logic. The 8-bit A/D converter uses successive
approximation as the conversion technique. The converter
features a high impedance chopper stabilized comparator, a
256R voltage divider with analog switch tree and a successive
approximation register. The 16-channel multiplexer can di-
rectly access any one of 16-single-ended analog signals, and
provides the logic for additional channel expansion. Signal
conditioning of any analog input signal is eased by direct ac-
cess to the multiplexer output, and to the input of the 8-bit A/
D converter.
The device eliminates the need for external zero and full-scale
adjustments. Easy interfacing to microprocessors is provided
by the latched and decoded multiplexer address inputs and
latched TTL TRI-STATE
®
outputs.
The design of the ADC0816, ADC0817 has been optimized
by incorporating the most desirable aspects of several A/D
conversion techniques. The ADC0816, ADC0817 offers high
speed, high accuracy, minimal temperature dependence, ex-
cellent long-term accuracy and repeatability, and consumes
minimal power. These features make this device ideally suit-
ed to applications from process and machine control to con-
sumer and automotive applications. For similar performance
in an 8-channel, 28-pin, 8-bit A/D converter, see the
ADC0808, ADC0809 data sheet. (See AN-258 for more in-
formation.)
Features
■
Easy interface to all microprocessors
■
Operates ratiometrically or with 5 V
DC
or analog span
■
■
■
■
■
■
■
■
■
■
adjusted voltage reference
16-channel multiplexer with latched control logic
Outputs meet TTL voltage level specifications
0V to 5V analog input voltage range with single 5V supply
No zero or full-scale adjust required
Standard hermetic or molded 40-pin DIP package
Temperature range −40°C to +85°C or −55°C to +125°C
Latched TRI-STATE output
Direct access to “comparator in” and “multiplexer out” for
signal conditioning
ADC0816 equivalent to MM74C948
ADC0817 equivalent to MM74C948-1
Key Specifications
■
■
■
■
■
Resolution
Total Unadjusted Error
Single Supply
Low Power
Conversion Time
8 Bits
±½ LSB and ±1 LSB
5 V
DC
15 mW
100 μs
Block Diagram
527701
TRI-STATE® is a trademark of National Semiconductor Corporation.
© 2007 National Semiconductor Corporation
5277
www.national.com
ADC0816/ADC0817
Connection Diagram
Dual-In-Line Package
527706
Order Number ADC0816CCN or ADC0817CCN
See NS Package Number N40A
Ordering Information
TEMPERATURE RANGE
Error
±½ Bit Unadjusted
±1 Bit Unadjusted
Package Outline
* This product is obsolete in the Hermetic DIP.
ADC0816CCN
ADC0817CCN
N40A Molded DIP
J40A Hermetic DIP
−40°C to +85°C
ADC0816CCJ *
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2
ADC0816/ADC0817
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
) (Note 3)
Voltage at Any Pin
6.5V
−0.3V to (V
CC
+0.3V)
Molded Chip Carrier Package
Vapor Phase (60 seconds)
Infrared (15 seconds)
ESD Susceptibility (Note 9)
215°C
220°C
400V
(Notes 1, 2)
−40°C
≤
T
A
≤
+85°C
4.5 V
DC
to 6.0 V
DC
0V to V
CC
T
MIN
≤
T
A
≤
T
MAX
Operating Conditions
Temperature Range (Note 1)
ADC0816CCN, ADC0817CCN
Except Control Inputs
Voltage at Control Inputs
−0.3V to 15V
(START, OE, CLOCK, ALE, EXPANSION CONTROL,
ADD A, ADD B, ADD C, ADD D)
Storage Temperature Range
−65°C to + 150°C
Package Dissipation at T
A
= 25°C
875 mW
Lead Temp. (Soldering, 10 seconds)
Dual-In-Line Package (Plastic)
260°C
Range of V
CC
(Note 1)
Voltage at Any Pin
Except Control Inputs
Voltage at Control Inputs
0V to 15V
(START, OE, CLOCK, ALE, EXPANSION CONTROL,
ADD A, ADD B, ADD C, ADD D)
Electrical Characteristics
Converter Specifications:
V
CC
=5 V
DC
= V
REF(+)
, V
REF(−)
=GND, V
IN
=V
COMPARATOR IN,
T
MIN
≤
T
MAX
and f
CLK
= 640 kHz unless other-
wise stated.
Symbol
Parameter
ADC0816
Total Unadjusted Error
(Note
5)
ADC0817
Total Unadjusted Error
(Note
5)
Input Resistance
Analog Input Voltage Range
V
REF(+)
Voltage, Top of Ladder
Voltage, Center of Ladder
V
REF(−)
Voltage, Bottom of Ladder
Comparator Input Current
Measured at Ref(−)
f
c
=640 kHz, (Note 6)
25°C
T
MIN
to T
MAX
0°C to 70°C
T
MIN
to T
MAX
From Ref(+) to Ref(−)
(Note 4) V(+) or V(−)
Measured at Ref(+)
V
CC
/2 − 0.1
−0.1
−2
1.0
GND − 0.1
V
CC
V
CC
/2
0
±0.5
2
4.5
V
CC
+ 0.1
V
CC
+0.1
V
CC
/2 + 0.1
Conditions
Min
Typ
Max
±½
±¾
±1
±1¼
Units
LSB
LSB
LSB
LSB
kΩ
V
DC
V
V
V
μA
Electrical Characteristics
Digital Levels and DC Specifications:
ADC0816CCN, ADC0817CCN—4.75V
≤
V
CC
≤
5.25V, −40°C
≤
T
A
≤
+85°C unless otherwise
noted.
Symbol
ANALOG MULTIPLEXER
(Any Selected Channel)
T
A
=25°C, R
L
=10k
T
A
=85°C
T
A
=125°C
ΔR
ON
ΔON
Resistance Between Any 2
Channels
OFF Channel Leakage Current
(Any Selected Channel)
R
L
=10k
V
CC
=5V, V
IN
=5V,
I
OFF+
T
A
=25°C
T
MIN
to T
MAX
V
CC
=5V, V
IN
=0,
I
OFF(−)
OFF Channel Leakage Current
T
A
=25°C
T
MIN
to T
Max
−200
−1.0
nA
μA
10
200
1.0
nA
μA
75
1.5
3
6
9
kΩ
kΩ
kΩ
Ω
Parameter
Conditions
Min
Typ
Max
Units
R
ON
Analog Multiplexer ON Resistance
3
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