A/D Converter. ADC0808-N Datasheet

ADC0808-N Converter. Datasheet pdf. Equivalent

Part ADC0808-N
Description A/D Converter
Feature ADC0808-N, ADC0809-N www.ti.com SNAS535H – OCTOBER 1999 – REVISED MARCH 2013 ADC0808/ADC0809 8-Bi.
Manufacture etcTI
Datasheet
Download ADC0808-N Datasheet



ADC0808-N
ADC0808-N, ADC0809-N
www.ti.com
SNAS535H – OCTOBER 1999 – REVISED MARCH 2013
ADC0808/ADC0809 8-Bit μP Compatible A/D Converters with 8-Channel Multiplexer
Check for Samples: ADC0808-N, ADC0809-N
FEATURES
1
2 Easy Interface to All Microprocessors
• Operates Ratiometrically or with 5 VDC or
Analog Span Adjusted Voltage Reference
• No Zero or Full-Scale Adjust Required
• 8-Channel Multiplexer with Address Logic
• 0V to VCC Input Range
• Outputs meet TTL Voltage Level Specifications
• ADC0808 Equivalent to MM74C949
• ADC0809 Equivalent to MM74C949-1
KEY SPECIFICATIONS
• Resolution: 8 Bits
• Total Unadjusted Error: ±½ LSB and ±1 LSB
• Single Supply: 5 VDC
• Low Power: 15 mW
• Conversion Time: 100 μs
DESCRIPTION
The ADC0808, ADC0809 data acquisition component
is a monolithic CMOS device with an 8-bit analog-to-
digital converter, 8-channel multiplexer and
microprocessor compatible control logic. The 8-bit
A/D converter uses successive approximation as the
conversion technique. The converter features a high
impedance chopper stabilized comparator, a 256R
voltage divider with analog switch tree and a
successive approximation register. The 8-channel
multiplexer can directly access any of 8-single-ended
analog signals.
The device eliminates the need for external zero and
full-scale adjustments. Easy interfacing to
microprocessors is provided by the latched and
decoded multiplexer address inputs and latched TTL
TRI-STATE outputs.
The design of the ADC0808, ADC0809 has been
optimized by incorporating the most desirable aspects
of several A/D conversion techniques. The ADC0808,
ADC0809 offers high speed, high accuracy, minimal
temperature dependence, excellent long-term
accuracy and repeatability, and consumes minimal
power. These features make this device ideally suited
to applications from process and machine control to
consumer and automotive applications. For 16-
channel multiplexer with common output (sample/hold
port) see ADC0816 data sheet. (See AN-247
(Literature Number SNOA595) for more information.)
Block Diagram
Connection Diagrams
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



ADC0808-N
ADC0808-N, ADC0809-N
SNAS535H – OCTOBER 1999 – REVISED MARCH 2013
www.ti.com
Figure 1. PDIP Package
Figure 2. PLCC
See Package N0028E
Package
See Package FN0028A
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)(4)
Voltage at Any Pin Except Control Inputs
Voltage at Control Inputs
(START, OE, CLOCK, ALE, ADD A, ADD B, ADD C)
Storage Temperature Range
Package Dissipation at TA=25°C
Lead Temp. (Soldering, 10 seconds)
PDIP Package (plastic)
PLCC Package
ESD Susceptibility(5)
Vapor Phase (60 seconds)
Infrared (15 seconds)
6.5V
0.3V to (VCC+0.3V)
0.3V to +15V
65°C to +150°C
875 mW
260°C
215°C
220°C
400V
(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 GND, unless otherwise specified.
(3) If Military/Aerospace specified devices are required, please contact the TI Sales Office/Distributors for availability and specifications.
(4) A Zener diode exists, internally, from VCC to GND and has a typical breakdown voltage of 7 VDC.
(5) Human body model, 100 pF discharged through a 1.5 kΩ resistor.
Operating Conditions (1)(2)
Temperature Range
Range of VCC
TMINTATMAX
40°CTA+85°C
4.5 VDC to 6.0 VDC
(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 GND, unless otherwise specified.
Electrical Characteristics – Converter Specifications
Converter Specifications: VCC=5 VDC=VREF+, VREF()=GND, TMINTATMAX and fCLK=640 kHz unless otherwise stated.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
ADC0808
Total Unadjusted Error(1)
25°C
TMIN to TMAX
±½
LSB
±¾
LSB
(1) Total unadjusted error includes offset, full-scale, linearity, and multiplexer errors. See Figure 5. None of these A/Ds requires a zero or
full-scale adjust. However, if an all zero code is desired for an analog input other than 0.0V, or if a narrow full-scale span exists (for
example: 0.5V to 4.5V full-scale) the reference voltages can be adjusted to achieve this. See Figure 15.
2
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Copyright © 1999–2013, Texas Instruments Incorporated
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