ADC0804LCN Intersil, ADC0804LCN Datasheet

IC ADC 8-BIT 10KSPS 1LSB 20-DIP

ADC0804LCN

Manufacturer Part Number
ADC0804LCN
Description
IC ADC 8-BIT 10KSPS 1LSB 20-DIP
Manufacturer
Intersil
Datasheet

Specifications of ADC0804LCN

Number Of Bits
8
Sampling Rate (per Second)
10k
Data Interface
Parallel
Number Of Converters
1
Voltage Supply Source
Single Supply
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
20-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
ADC0804LCNIN
ADC0804LCNIN

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8-Bit, Microprocessor-Compatible, A/D
Converters
The ADC080X family are CMOS 8-Bit, successive-
approximation A/D converters which use a modified
potentiometric ladder and are designed to operate with the
8080A control bus via three-state outputs. These converters
appear to the processor as memory locations or I/O ports,
and hence no interfacing logic is required.
The differential analog voltage input has good common-
mode-rejection and permits offsetting the analog zero-input-
voltage value. In addition, the voltage reference input can be
adjusted to allow encoding any smaller analog voltage span
to the full 8 bits of resolution.
Typical Application Schematic
Ordering Information
ADC0803LCN
ADC0804LCN
PART NUMBER
PROCESSOR
ANY
ERROR
1
1 LSB
/
2
11
12
13
14
15
16
17
18
LSB
1
2
3
5
®
CS
RD
WR
INTR
DB
DB
DB
DB
DB
DB
DB
DB
1
7
6
5
4
3
2
1
0
8-BIT RESOLUTION
V
Reading
V
VOLTAGE RANGE
REF
REF
ANALOG INPUT
CLK IN
V
CLK R
V
DGND
AGND
V
REF
IN
Data Sheet
IN
/2 Adjusted for Correct Full Scale
/2 = 2.500V
V+
(+)
(-)
OVER ANY
/2
EXTERNAL CONDITIONS
DESIRED
20
19
10
4
6
7
8
9
10K
+5V
V
REF
INPUTS
DC
DIFF
/2
150pF
(No Adjustments)
1-888-INTERSIL or 321-724-7143
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• 80C48 and 80C80/85 Bus Compatible - No Interfacing
• Conversion Time . . . . . . . . . . . . . . . . . . . . . . . . . . <100 s
• Easy Interface to Most Microprocessors
• Will Operate in a “Stand Alone” Mode
• Differential Analog Voltage Inputs
• Works with Bandgap Voltage References
• TTL Compatible Inputs and Outputs
• On-Chip Clock Generator
• Analog Voltage Input Range
• No Zero-Adjust Required
• 80C48 and 80C80/85 Bus Compatible - No Interfacing
Pinout
Logic Required
(Single + 5V Supply) . . . . . . . . . . . . . . . . . . . . . . 0V to 5V
Logic Required
TEMP. RANGE (
0 to 70
0 to 70
August 2002
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
CLK IN
V
V
DGND
V
AGND
REF
IN
INTR
IN
WR
CS
RD
(+)
(-)
/2
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
o
10
1
2
3
4
5
6
7
8
9
C)
ADC0803, ADC0804
ADC0803, ADC0804
20 Ld PDIP
20 Ld PDIP
TOP VIEW
(PDIP)
PACKAGE
20
19
18
17
16
15
14
13
12
11
V+ OR V
CLK R
DB
DB
DB
DB
DB
DB
DB
DB
0 (LSB)
1
2
3
4
5
6
7 (MSB)
REF
FN3094.4
E20.3
E20.3
PKG. NO

Related parts for ADC0804LCN

ADC0804LCN Summary of contents

Page 1

... PART NUMBER ERROR 1 ADC0803LCN / LSB V /2 Adjusted for Correct Full Scale 2 REF Reading ADC0804LCN 1 LSB 2.500V REF 1 Features • 80C48 and 80C80/85 Bus Compatible - No Interfacing Logic Required • Conversion Time . . . . . . . . . . . . . . . . . . . . . . . . . . <100 s • Easy Interface to Most Microprocessors • Will Operate in a “Stand Alone” Mode • ...

Page 2

Functional Diagram CLK R 19 CLK A CLK IN CLK 4 GEN CLKS CLK OSC 10 DGND REF DECODER REF DAC AGND V 8 OUT V+ - ...

Page 3

Absolute Maximum Ratings Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 4

Electrical Specifications (Notes 2, 8) (Continued) PARAMETER DC DIGITAL LEVELS AND DC SPECIFICATIONS V+ = 5V, and T CONTROL INPUTS (Note 7) Logic “1“ Input Voltage (Except Pin 4 CLK IN), V INH Logic “0“ Input Voltage (Except Pin 4 ...

Page 5

Timing Waveforms (Continued 10K FIGURE 1C Typical Performance Curves 1 - 125 C 1.7 1.6 1.5 1.4 1.3 4.50 4.75 5.00 V+ SUPPLY VOLTAGE (V) FIGURE 2. LOGIC ...

Page 6

Typical Performance Curves 400 800 1200 f (kHz) CLK FIGURE 6. FULL SCALE ERROR DATA OUTPUT BUFFERS SINK V ...

Page 7

Timing Diagrams (Continued) INTR CS RD DATA OUTPUTS ANALOG INPUT (V TRANSFER FUNCTION ANALOG INPUT ...

Page 8

Understanding A/D Error Specs A perfect A/D transfer characteristic (staircase wave-form) is shown in Figure 11A. The horizontal scale is analog input voltage and the particular points labeled are in steps of 1 LSB (19.53mV with 2.5V tied to the ...

Page 9

A correction is made to 1 offset the comparison by / LSB (see Figure 11A). 2 Analog Differential Voltage Inputs and Common- Mode Rejection This A/D gains considerable applications flexibility from the analog differential voltage input. The ...

Page 10

Such an adjusted reference voltage can accommodate a reduced span or dynamic voltage range of the analog input voltage. If the analog input voltage were to range from 0.5V to 3.5V, instead 5V, the span would be ...

Page 11

IC voltage regulators may be used for references if the ambient temperature changes are not excessive. Zero Error The zero of the A/D does not require adjustment. If the minimum analog input voltage value, V lN(MlN) zero offset can ...

Page 12

Finally, if time is short and capacitive loading is high, external bus drivers must be used. These can be three-state buffers (low power Schottky is recommended, such as the 74LS240 series) or special higher-drive-current products which are designed as bus ...

Page 13

This converter has been designed to directly interface with 8080/85 or Z-80 Microprocessors. The three-state output capability of the A/D eliminates the need for a peripheral interface device, although address decoding is still required to generate the appropriate CS for ...

Page 14

ANALOG INPUTS 150pF NOTE: Pin numbers for 8228 System Controller: Others are 8080A. 14 ADC0803, ADC0804 10K ADC0803 - ADC0804 CLK R 19 LSB CLK IN DB ...

Page 15

IORQ ADC0803- ADC0804 74C32 FIGURE 22. MAPPING THE A I/O DEVICE FOR USE WITH THE Z-80 CPU ANALOG INPUTS 15 ADC0803, ADC0804 ADC0803 - ADC0804 ANALOG 5 INPUTS ...

Page 16

Die Characteristics DIE DIMENSIONS 101 mils x 93 mils METALLIZATION Type: Al Å Å Thickness: 10k 1k Metallization Mask Layout V /2 REF DGND DB 7 (MSB ADC0803, ADC0804 PASSIVATION Type: Nitride over ...

Page 17

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. How- ever, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries ...

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