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

ADC0804LCN

Manufacturer Part NumberADC0804LCN
DescriptionIC ADC 8-BIT 10KSPS 1LSB 20-DIP
ManufacturerIntersil
ADC0804LCN datasheet
 


Specifications of ADC0804LCN

Number Of Bits8Sampling Rate (per Second)10k
Data InterfaceParallelNumber Of Converters1
Voltage Supply SourceSingle SupplyOperating Temperature0°C ~ 70°C
Mounting TypeThrough HolePackage / Case20-DIP (0.300", 7.62mm)
Lead Free Status / RoHS StatusContains lead / RoHS non-compliantOther namesADC0804LCNIN
ADC0804LCNIN
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
Page 1/17

Download datasheet (581Kb)Embed
Next
®
Data Sheet
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
1
CS
V+
2
RD
CLK R
3
WR
CLK IN
5
INTR
11
DB
7
12
DB
ANY
6
13
PROCESSOR
DB
5
14
DB
V
(+)
4
IN
15
DB
V
3
IN
16
DB
AGND
2
17
DB
V
1
REF
18
DB
DGND
0
8-BIT RESOLUTION
ANALOG INPUT
VOLTAGE RANGE
Ordering Information
PART NUMBER
ERROR
1
ADC0803LCN
/
LSB
V
/2 Adjusted for Correct Full Scale
2
REF
Reading
ADC0804LCN
1 LSB
V
/2 = 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
• Differential Analog Voltage Inputs
• Works with Bandgap Voltage References
• TTL Compatible Inputs and Outputs
• On-Chip Clock Generator
• Analog Voltage Input Range
(Single + 5V Supply) . . . . . . . . . . . . . . . . . . . . . . 0V to 5V
• No Zero-Adjust Required
• 80C48 and 80C80/85 Bus Compatible - No Interfacing
Logic Required
20
+5V
150pF
Pinout
19
4
10K
6
DIFF
7
INPUTS
(-)
8
9
/2
V
/2
REF
10
OVER ANY
DESIRED
EXTERNAL CONDITIONS
TEMP. RANGE (
(No Adjustments)
DC
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
ADC0803, ADC0804
August 2002
FN3094.4
ADC0803, ADC0804
(PDIP)
TOP VIEW
1
20
V+ OR V
CS
REF
2
RD
19
CLK R
3
18
DB
WR
0 (LSB)
4
17
DB
CLK IN
1
5
16
DB
INTR
2
V
(+)
6
15
DB
IN
3
V
(-)
7
14
DB
IN
4
8
AGND
13
DB
5
V
/2
9
12
DB
REF
6
DGND
10
11
DB
7 (MSB)
o
C)
PACKAGE
0 to 70
20 Ld PDIP
E20.3
0 to 70
20 Ld PDIP
E20.3
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
PKG. NO

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 ...