A/D Converter. ADC0820-N Datasheet

ADC0820-N Converter. Datasheet pdf. Equivalent

Part ADC0820-N
Description A/D Converter
Feature ADC0820-N www.ti.com SNAS529C – JUNE 1999 – REVISED MARCH 2013 ADC0820-N 8-Bit High Speed µP Comp.
Manufacture etcTI
Datasheet
Download ADC0820-N Datasheet




ADC0820-N
ADC0820-N
www.ti.com
SNAS529C – JUNE 1999 – REVISED MARCH 2013
ADC0820-N 8-Bit High Speed µP Compatible A/D Converter with Track/Hold Function
Check for Samples: ADC0820-N
FEATURES
1
2 Built-In Track-and-Hold Function
• No Missing Codes
• No External Clocking
• Single Supply—5 VDC
• Easy Interface to All Microprocessors, or
Operates Stand-Alone
• Latched TRI-STATE Output
• Logic Inputs and Outputs Meet Both MOS and
T2L Voltage Level Specifications
• Operates Ratiometrically or with any
Reference Value Equal to or Less than VCC
• 0V to 5V Analog Input Voltage Range with
Single 5V Supply
• No Zero or Full-Scale Adjust Required
• Overflow Output Available for Cascading
• 0.3 in. Standard Width 20-Pin PDIP
• 20-Pin PLCC
• 20-Pin SOIC
KEY SPECIFICATIONS
• Resolution: 8 Bits
• Conversion Time
– 2.5 µs Max (RD Mode)
– 1.5 µs Max (WR-RD Mode)
• Low Power: 75 mW Max
• Total Unadjusted Error: ±½ LSB and ± 1 LSB
DESCRIPTION
By using a half-flash conversion technique, the 8-bit
ADC0820-N CMOS A/D offers a 1.5 µs conversion
time and dissipates only 75 mW of power. The half-
flash technique consists of 32 comparators, a most
significant 4-bit ADC and a least significant 4-bit
ADC.
The input to the ADC0820-N is tracked and held by
the input sampling circuitry eliminating the need for
an external sample-and-hold for signals moving at
less than 100 mV/µs.
For ease of interface to microprocessors, the
ADC0820-N has been designed to appear as a
memory location or I/O port without the need for
external interfacing logic.
Connection and Functional Diagrams
Figure 1. CDIP, PDIP,
and SOIC Packages (Top View)
Figure 2. PLCC Package
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1999–2013, Texas Instruments Incorporated



ADC0820-N
ADC0820-N
SNAS529C – JUNE 1999 – REVISED MARCH 2013
www.ti.com
Figure 3. Functional Diagram
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings(1)(2)(3)
Supply Voltage (VCC)
Logic Control Inputs
Voltage at Other Inputs and Output
Storage Temperature Range
Package Dissipation at TA = 25°C
Input Current at Any Pin(4)
Package Input Current(4)
ESD Susceptibility(5)
PDIP Package
Lead Temp. (Soldering, 10 sec.)
CDIP Package
SOIC Package
Vapor Phase (60 sec.)
Infrared (15 sec.)
10V
0.2V to VCC +0.2V
0.2V to VCC +0.2V
65°C to +150°C
875 mW
1 mA
4 mA
900V
260°C
300°C
215°C
220°C
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not
apply when operating the device beyond its specified operating conditions.
(2) All voltages are measured with respect to the GND pin, unless otherwise specified.
(3) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(4) When the input voltage (VIN) at any pin exceeds the power supply rails (VIN < Vor VIN > V+) the absolute value of current at that pin
should be limited to 1 mA or less. The 4 mA package input current limits the number of pins that can exceed the power supply
boundaries with a 1 mA current limit to four.
(5) Human body model, 100 pF discharged through a 1.5 kΩ resistor.
Operating Ratings(1)(2)
Temperature Range (TMINTATMAX)
ADC0820CCJ, ADC0820CIWM
ADC0820BCN, ADC0820CCN, ADC0820BCV,
ADC0820BCWM, ADC0820CCWM
40°CTA+85°C
0°CTA70°C
VCC Range
4.5V to 8V
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not
apply when operating the device beyond its specified operating conditions.
(2) All voltages are measured with respect to the GND pin, unless otherwise specified.
2
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