ADC122S021   
2 Channel, 50 ksps to 200 ksps 12-Bit A/D Converter from the PowerWise® Family		 Click link to Download

Features
•Specified over a range of sample rates.
•Two input channels
•Variable power management
•Single power supply with 2.7V - 5.25V range

Description

The ADC122S021 is a low-power, two-channel CMOS 12-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 ADC122S021 is fully specified over a sample rate range of 50 ksps to 200 ksps. The converter is based on 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 ADC122S021 operates with a single supply that can range from +2.7V to +5.25V. Normal power consumption using a +3V or +5V supply is 2.2 mW and 7.9 mW, respectively. The power-down feature reduces the power consumption to just 0.14 µW using a +3V supply, or 0.32 µW using a +5V supply.

The ADC122S021 is packaged in an 8-lead MSOP package. Operation over the industrial temperature range of −40°C to +85°C is guaranteed.

Key Specification

DNL

+0.4 / −0.2 LSB (typ)

INL

± 0.35 LSB (typ)

SNR

72.0 dB (typ)

Power Consumption

3V Supply

2.2 mW (typ)

5V Supply

7.9 mW (typ)

Applications
•Portable Systems
•Remote Data Acquisition
•Instrumentation and Control Systems
ADC122S021 Webench® Custom
Design/Analyze/Build It
ADC Parameters
ADC and Op Amp Supply voltage:
5 V 3.3 V
help
Sample Rate
Sample Rate per channel ksps help
Operating Conditions
Min. Ambient Temperature degC help
Nominal Ambient Temperature degC help
Max. Ambient Temperature degC help

Also Recommended
ADC082S021▲For 8 Bits
ADC102S021▲For 10 Bits
ADC122S051▲For Speeds From 200Ksps To 500Ksps
ADC122S101▲For Speeds From 500Ksps To 1Msps



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                                              ADC122S021
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Also Recommended
ADC082S021▲For 8 Bits
ADC102S021▲For 10 Bits
ADC122S051▲For Speeds From 200Ksps To 500Ksps
ADC122S101▲For Speeds From 500Ksps To 1Msps

Typical Application
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Block Diagram
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Typical Performance
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Paramaters / ValuesADC122S021 ADC082S021 ADC102S021 ADC122S051 ADC122S101
Pin and Function Compatible Family2 ch, MSOP-8 2 ch, MSOP-8 2 ch, MSOP-8 2 ch, MSOP-8 2 ch, MSOP-8
Resolution12 bits 8 bits 10 bits 12 bits 12 bits
Input Channels2 2 2 2 2
Sample Rate Range (sps)50k to 200k 50k to 200k 50k to 200k 200k to 500k 500k to 1M
Interface TypeSPI / QSPI / Microwire SPI / QSPI / Microwire SPI / QSPI / Microwire SPI / QSPI / Microwire SPI / QSPI / Microwire
Differential InputNo No No No No
Power Down, typ. at 3.6V0.14 uW 0.72 uW 0.12 uW 0.14 uW 0.14 uW
Operating Power, typ at 3.6V, max ksps0.018 mW 0.016 mW 0.013 mW 0.009 mW 0.006 mW
Operating Power, 3.6V, 1ksps, max. PwrDn2.2 mW 1.6 mW 1.9 mW 3.0 mW 4.3 mW
PowerWise Rating 11.65 pJ/conv 16.75 pJ/conv 5.08 pJ/conv 0.9 pJ/conv 0.65 pJ/conv
INL (LSB)+/-0.35 +/-0.04 +/-0.13 +/-0.5 +/-0.64
DNL (LSB)+0.4; -0.2 +/-0.04 +/-0.13 +0.7; -0.4 +0.9; -0.6
ENOB11.7 bits 7.9 bits 9.9 bits 11.7 bits 11.7 bits
SINAD72 dB 49.6 dB 61.8 dB 72 dB 72 dB
SNR72 dB 49.6 dB 61.8 dB 72.5 dB 72.4 dB
Max KSample Rate200 ksps 200 ksps 200 ksps 500 ksps 1000 ksps
Min Supply Voltage2.7 Volt 2.7 Volt 2.7 Volt 2.7 Volt 2.7 Volt
Max Supply Voltage5.25 Volt 5.25 Volt 5.25 Volt 5.25 Volt 5.25 Volt
Reference SourceSupply Supply Supply Supply Supply
Temperature Min-40 deg C -40 deg C -40 deg C -40 deg C -40 deg C
Temperature Max85 deg C 85 deg C 85 deg C 85 deg C 85 deg C
Power DownYes Yes Yes Yes Yes
Input Sample/HoldYes Yes Yes Yes Yes
Special FeaturesUndefined Undefined Undefined Undefined Undefined
Data Converter TypeADC ADC ADC ADC ADC
Max Sample Rate0.2 MSPS 0.2 MSPS 0.2 MSPS 0.5 MSPS 1 MSPS
AutomotiveYes Yes Yes
PowerWiseYes Yes Yes Yes Yes

Datasheet
TitleSizeDateOther
Language
ADC122S021 2 Channel, 50 ksps to 200 ksps 12-Bit A/D Converter431
Kbytes		1-Aug-08日本語


Featured Application Notes
TitleSizeDateOther
Language
AN-1261: Application Note 1261 Power Supply Effects on Noise Performance78
Kbytes		16-Mar-07 中文


More Application Notes
TitleSizeDateOther
Language
AN-1261: Application Note 1261 Power Supply Effects on Noise Performance78
Kbytes		16-Mar-07 中文

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
ADC122S021CIMM/NOPB

RoHS



MINI SOIC		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide2153
FARNELLEurope and Asia1823
FUTUREWorldwide1100
NEWARKAmericas726
RS COMPONENTSWorldwide980
$1.45 each at 1K+ pcsreel
of
1000
ADC122S021CIMMX/NOPB

RoHS



MINI SOIC		Full production
Lead Time: 16 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.45 each at 1K+ pcsreel
of
3500

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
ADC122S021EVAL
2 Channel, 200 KSPS 12-Bit A/D ConverterFull production
Lead Free (RoHS)

 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide10
$120.00 each1

Description:

The ADC122S021 is a 2.2 mW, CMOS 12-bit, 200 KSPS Analog-to-Digital converter offered in a 8-lead SOT-23 package.

This ADC Design Kit, consisting of one ADC122S021 evaluation board and WaveVision4 hardware, is designed to ease the evaluation and design-in of these National Semiconductor Analog-to-Digital Converters. These evaluation boards allow the designer to evaluate product performance in a choice of two ways: in standalone mode with a logic analyzer and appropriate software (including National's WaveVision software), or with a personal computer and WaveVision4 hardware and software.

Features:

  • Specified over a range of sample rates.
  • Two input channels
  • Variable power management
  • Single power supply with 2.7V - 5.25V range

Contents:


Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
ADC122S021CIMM/NOPB
MINI SOIC81260RoHSDownloadN/A
ZXTT
X18C
ADC122S021CIMMX/NOPB
MINI SOIC81260RoHSDownloadN/A
ZXTT
X18C

Design Tools
TitleSizeDate
Evaluation Boards & Development Systems  

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
ADC122S021CIMMCMOS70184060010890004309006723
ADC122S021CIMMXCMOS70184060010890004309006723

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


Data Acquisition In Factory Automation
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Data Acquisition In Factory Automation
Date: 8/24/2009
Length: 0:31:29

[Information as of 21-Nov-2009]