ADC0802LCD INTERSIL [Intersil Corporation], ADC0802LCD Datasheet

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ADC0802LCD

Manufacturer Part Number
ADC0802LCD
Description
8-Bit, Microprocessor- Compatible, A/D Converters
Manufacturer
INTERSIL [Intersil Corporation]
Datasheet

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ADC0802LCD
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AD
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Part Number:
ADC0802LCD
Manufacturer:
INTERS
Quantity:
607
August 1997
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999
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
• 0V to 5V Analog Voltage Input Range (Single + 5V Supply)
• No Zero-Adjust Required
Ordering Information
Pinout
CLK IN
V
V
DGND
ADC0802LCN
ADC0802LCD
ADC0802LD
ADC0803LCN
ADC0803LCD
ADC0803LCWM
ADC0803LD
ADC0804LCN
ADC0804LCD
ADC0804LCWM
AGND
V
PART NUMBER
REF
INTR
IN
Logic Required
IN
WR
RD
CS
ADC0802, ADC0803, ADC0804
(+)
(-)
/2
10
1
2
3
4
5
6
7
8
9
(PDIP, CERDIP)
TOP VIEW
ERROR
1
3
1
3
1 LSB
1 LSB
1 LSB
1 LSB
1 LSB
1 LSB
/
/
/
/
2
4
2
4
20
19
18
17
16
15
14
13
12
11
LSB
LSB
LSB
LSB
V+ OR V
CLK R
DB
DB
DB
DB
DB
DB
DB
DB
0 (LSB)
1
2
3
4
5
6
7 (MSB)
V
V
Reading
V
REF
REF
REF
REF
/2 = 2.500V
/2 Adjusted for Correct Full Scale
/2 = 2.500V
EXTERNAL CONDITIONS
Typical Application Schematic
PROCESSOR
ANY
DC
DC
(No Adjustments)
(No Adjustments)
ADC0802, ADC0803
6-5
Description
The ADC0802 family are CMOS 8-Bit, successive-approxi-
mation 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.
TEMP. RANGE (
11
12
13
14
15
16
17
18
1
2
3
5
-55 to 125
-55 to 125
-40 to 85
-40 to 85
-40 to 85
-40 to 85
-40 to 85
0 to 70
0 to 70
0 to 70
CS
RD
WR
INTR
DB
DB
DB
DB
DB
DB
DB
DB
7
6
5
4
3
2
1
0
Compatible, A/D Converters
CLK IN
V
CLK R
V
DGND
AGND
V
REF
IN
o
IN
C)
V+
(+)
(-)
/2
8-Bit, Microprocessor-
20
19
10
20 Ld PDIP
20 Ld CERDIP
20 Ld CERDIP
20 Ld PDIP
20 Ld CERDIP
20 Ld SOIC
20 Ld CERDIP
20 Ld PDIP
20 Ld CERDIP
20 Ld SOIC
4
6
7
8
9
ADC0804
10K
V
PACKAGE
+5V
REF
INPUTS
DIFF
/2
150pF
File Number
8-BIT RESOLUTION
OVER ANY
DESIRED
ANALOG INPUT
VOLTAGE RANGE
E20.3
F20.3
F20.3
E20.3
F20.3
M20.3
F20.3
E20.3
F20.3
M20.3
PKG. NO
3094.1

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ADC0802LCD Summary of contents

Page 1

... Works with Bandgap Voltage References • TTL Compatible Inputs and Outputs • On-Chip Clock Generator • Analog Voltage Input Range (Single + 5V Supply) • No Zero-Adjust Required Ordering Information PART NUMBER ERROR 1 ADC0802LCN / LSB V 2 REF 3 ADC0802LCD / LSB 4 ADC0802LD 1 LSB 1 ADC0803LCN / LSB V 2 REF Reading 3 ADC0803LCD ...

Page 2

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

Page 3

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

Page 4

Electrical Specifications (Notes 1, 7) (Continued) PARAMETER CONVERTER SPECIFICATIONS V+ = 5V, -55 Total Unadjusted Error ADC0802 2.500V REF ADC0803 V /2 Adjusted for Correct Full REF Scale Reading V /2 Input Resistance Input Resistance at Pin ...

Page 5

Electrical Specifications (Notes 1, 7) (Continued) PARAMETER Logic “1” Output Voltage -360 4.75V OH O Three-State Disabled Output V OUT Leakage (All Data Buffers OUT Output Short Circuit Current, V ...

Page 6

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 INPUT THRESHOLD VOLTAGE vs SUPPLY VOLTAGE 3.5 3.1 V T(+) 2 -55 ...

Page 7

Typical Performance Curves 8 7 DATA OUTPUT BUFFERS SINK V = 0.4V OUT 2 -50 - AMBIENT TEMPERATURE ( A FIGURE 8. OUTPUT CURRENT vs TEMPERATURE Timing Diagrams CS WR ACTUAL ...

Page 8

ANALOG INPUT (V TRANSFER FUNCTION FIGURE 11A. ACCURACY = 0 LSB; PERFECT A ...

Page 9

The device may be operated in the free-running mode by con- necting INTR to the WR input with ensure start-up under all possible conditions, an external WR pulse is required during the first power-up cycle. A ...

Page 10

Input Source Resistance Large values of source resistance where an input bypass capacitor is not used will not cause errors since the input currents settle out prior to the comparison time low- pass filter is required in the ...

Page 11

IN(+) ADC0802- ADC0804 7 V IN(-) FIGURE 15. HANDLING 5V ANALOG INPUT RANGE Reference Accuracy Requirements The converter can be operated in a pseudo-ratiometric mode or an absolute mode. In ratiometric converter ...

Page 12

ADC0802 - ADC0804 150pF CLK N. CLK IN START 5 INTR DB V (+) ANALOG INPUTS V (-) AGND DB V ...

Page 13

Figures 19 and 20 show more sophisticated test circuits. 8-BIT 10-BIT A/D UNDER DAC TEST R “B” - ANALOG + INPUTS A1 R 100R “A” A2 FIGURE 19. A/D TESTER WITH ANALOG ERROR OUTPUT. THIS CIRCUIT CAN ...

Page 14

ANALOG INPUTS 150pF NOTE: Pin numbers for 8228 System Controller: Others are 8080A. ADC0802, ADC0803, ADC0804 10K ADC0802 - ADC0804 CLK R 19 LSB CLK IN ...

Page 15

IORQ ADC0802- ADC0804 74C32 FIGURE 22. MAPPING THE A I/O DEVICE FOR USE WITH THE Z-80 CPU ANALOG INPUTS FIGURE 24. ADC0802 TO MC6820 PIA INTERFACE ADC0802, ADC0803, ADC0804 10K ADC0802 - ...

Page 16

Die Characteristics DIE DIMENSIONS: (101 mils x 93 mils) x 525 METALLIZATION: Type: Al Å Å Thickness: 10k 1k Metallization Mask Layout V /2 REF DGND DB 7 (MSB All ...

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