Analog-to-Digital Converter. ADC082S021 Datasheet

ADC082S021 Converter. Datasheet pdf. Equivalent

Part ADC082S021
Description 8-Bit Analog-to-Digital Converter
Feature ADC082S021 www.ti.com SNAS282D – APRIL 2005 – REVISED MARCH 2013 ADC082S021 2 Channel, 50 ksps to.
Manufacture etcTI
Datasheet
Download ADC082S021 Datasheet




ADC082S021
ADC082S021
www.ti.com
SNAS282D – APRIL 2005 – REVISED MARCH 2013
ADC082S021 2 Channel, 50 ksps to 200 ksps, 8-Bit A/D Converter
Check for Samples: ADC082S021
FEATURES
1
2 Specified Over a Range of Sample Rates.
• Two Input Channels
• Variable Power Management
• Single Power Supply with 2.7V - 5.25V Range
KEY SPECIFICATIONS
• DNL: ±0.04 LSB (typ)
• INL: ±0.04 LSB (typ)
• SNR: 49.6 dB (typ)
• Power Consumption:
– 3V Supply 1.6 mW (typ)
– 5V Supply 5.8 mW (typ)
APPLICATIONS
• Portable Systems
• Remote Data Acquisition
• Instrumentation and Control Systems
DESCRIPTION
The ADC082S021 is a low-power, two-channel
CMOS 8-bit analog-to-digital converter with a high-
speed serial interface. Unlike the conventional
practice of specifying performance at a single sample
rate only, the ADC082S021 is fully specified over a
sample rate range of 50 ksps to 200 ksps. The
converter is based upon a successive-approximation
register architecture with an internal track-and-hold
circuit. It can be configured to accept one or two input
signals at inputs IN1 and IN2.
The output serial data is straight binary, and is
compatible with several standards, such as SPI™,
QSPI™, MICROWIRE, and many common DSP
serial interfaces.
The ADC082S021 operates with a single supply that
can range from +2.7V to +5.25V. Normal power
consumption using a +3V or +5V supply is 1.6 mW
and 5.8 mW, respectively. The power-down feature
reduces the power consumption to just 0.12 µW using
a +3V supply, or 0.35 µW using a +5V supply.
The ADC082S021 is packaged in an 8-lead VSSOP
package. Operation over the industrial temperature
range of 40°C to +85°C.
Table 1. Pin-Compatible Alternatives by Resolution and Speed(1)
Resolution
12-bit
10-bit
8-bit
50 to 200 ksps
ADC122S021
ADC102S021
ADC082S021
Specified for Sample Rate Range of:
200 to 500 ksps
ADC122S051
ADC102S051
ADC082S051
500 ksps to 1 Msps
ADC122S101
ADC102S101
ADC082S101
(1) All devices are fully pin and function compatible.
Connection Diagram
CS
VA
GND
IN2
1
8
2
7
ADC082S021
3
6
4
5
SCLK
DOUT
DIN
IN1
Figure 1. VSSOP Package
See Package Number DGK0008A
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 © 2005–2013, Texas Instruments Incorporated



ADC082S021
ADC082S021
SNAS282D – APRIL 2005 – REVISED MARCH 2013
Block Diagram
IN1
MUX
IN2
T/H
GND
8-BIT
SUCCESSIVE
APPROXIMATION
ADC
VA
GND
CONTROL
LOGIC
SCLK
CS
DIN
DOUT
www.ti.com
Pin No.
ANALOG I/O
5,4
DIGITAL I/O
8
7
6
1
POWER SUPPLY
2
3
Pin Descriptions and Equivalent Circuits
Pin Name
Description
IN1 and IN2
SCLK
DOUT
DIN
CS
Analog inputs. These signals can range from 0V to VA.
Digital clock input. This clock directly controls the conversion and readout processes.
Digital data output. The output samples are clocked out at this pin on falling edges of the
SCLK pin.
Digital data input. The ADC082S021's Control Register is loaded through this pin on rising
edges of the SCLK.
Chip select. On the falling edge of CS, a conversion process begins. Conversions continue
as long as CS is held low.
VA
GND
Positive supply pin. This pin should be connected to a quiet +2.7V to +5.25V source and
bypassed to GND with a 1 µF capacitor and a 0.1 µF monolithic capacitor located within 1
cm of the power pin.
The ground return for the die.
2
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Copyright © 2005–2013, Texas Instruments Incorporated
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