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ADC0820 Ver la hoja de datos (PDF) - Philips Electronics

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ADC0820 Datasheet PDF : 14 Pages
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Philips Semiconductors Linear Products
8-Bit, high-speed, µP-compatible A/D converter
with track/hold function
Product specification
ADC0820
DESCRIPTION
By using a half-flash conversion technique, the 8-bit ADC0820
CMOS A/D offers a 1.5µs conversion time while dissipating a
maximum 75mW of power. The half-flash technique consists of 31
comparators, a most significant 4-bit ADC and a least significant
4-bit ADC.
The input to the ADC0820 is tracked and held by the input sampling
circuitry, eliminating the need for an external sample-and-hold for
signals slewing at less than 100mV/µs.
For ease of interface to microprocessors, the ADC0820 has been
designed to appear as a memory location or I/O port without the
need for external interfacing logic.
FEATURES
Built-in track-and-hold function
No missing codes
No external clocking
Single supply—5VDC
Easy interface to all microprocessors, or operates stand-alone
Latched 3-State outputs
Logic inputs and outputs meet both MOS and TTL voltage level
specifications
Operates ratiometrically or with any reference value equal to or
less than VDD
0V to 5V analog input voltage range with single 5V supply
No zero- or full-scale adjust required
Overflow output available for cascading
0.3standard width 20-pin DIP
ORDERING INFORMATION
DESCRIPTION
20-Pin Plastic Dual In-Line Package (DIP)
20-Pin Plastic Small Outline (SO) package
PIN CONFIGURATION
D, F, N Packages
VIN 1
DB0 2
DB1 3
DB2 4
DB3 5
WR/RDY 6
MODE 7
RD 8
INT 9
GND 10
20 VDD
19 NC
18 OFL
17 DB7
16 DB6
15 DB5
14 DB4
13 CS
12 VREF(+)
11 VREF(–)
TOP VIEW
APPLICATIONS
Microprocessor-based monitoring and control systems
Transducer/µP interface
Process control
Logic analyzers
Test and measurement
TEMPERATURE RANGE
0 to +70°C
0 to +70°C
ORDER CODE
ADC0820CNEN
ADC0820CNED
DWG #
0408B
1021B
August 31, 1994
568
853-1631 13721

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