ADC121S655 - 12-Bit, 200 kSPS to 500 kSPS, Differential Input, Micro Power A/D Converter
Datasheet Packaging Samples & Pricing Reliability Knowledge Base

Features
• True Differential Inputs
• Guaranteed performance from 200 kSPS to 500 kSPS
• External Reference
• Wide Input Common-Mode Voltage Range
• SPI™/QSPI™/MICROWIRE™/DSP compatible Serial Interface

Key Specification

Conversion Rate

200 kSPS to 500 kSPS

INL

± 0.95 LSB (max)

DNL

± 0.85 LSB (max)

Offset Error

± 3.0 LSB (max)

Gain Error

± 5.5 LSB (max)

SINAD

70 dB (min)

Power Consumption at VA = 5V

  •  Active, 500 kSPS

    9 mW (typ)

     Active, 200 kSPS

    7 mW (typ)

     Power-Down

    1.5 µW (typ)

    • General Description

    The ADC121S655 is a 12-bit, 200 kSPS to 500 kSPS sampling Analog-to-Digital (A/D) converter that features a fully differential, high impedance analog input and an external reference. More...


    Applications

    • Automotive Navigation
    • Portable Systems
    • Medical Instruments
    • Instrumentation and Control Systems
    • Motor Control
    • Direct Sensor Interface
    		  Typical Application
    click for larger image

    Pressure Sensor Application

    ParametersValues
    Pin and Function Compatible Family 1 ch, MSOP-8
    Resolution 12 bits
    Input Channels 1
    Sample Rate Range (sps) 200k to 500k
    Interface Type SPI/QSPI/Microwire
    Differential Input Yes
    Power Down, typ. at 3.6V 1.5 uW
    Operating Power, typ at 3.6V, max ksps 0.019 mW
    Operating Power, 3.6V, 1ksps, max. PwrDn 9.0 mW
    PowerWise Rating 1 7.14 pJ/conv
    INL (LSB) ±, 0.95
    DNL (LSB) ±0.85
    ENOB 11.3 bits
    SINAD 70 dB
    SNR 71 dB
    Max KSample Rate 500 ksps
    Min Supply Voltage 4.5 Volt
    Max Supply Voltage 5.5 Volt
    Reference Source External
    Temperature Min -40 deg C
    Temperature Max 105 deg C
    Power Down Yes
    Input Sample/Hold Yes
    Special Features External Reference, Differential input
    Data Converter Type ADC
    Max Sample Rate 0.5 MSPS
    Automotive Yes


    Typical Performance

    click for larger image

    typical DNL plot
    		  Also Recommended
    ADC121S051▲Single Ended Input, Smaller Package
    ADC121S625▲50 To 200Ksps Pin Compatible Alternative
    ADC121S705▲500Ksps To 1Msps Pin Compatible Alternative
    Block Diagram
    click for larger image



    Datasheet
    RoHS Compliance Information Size in KbytesDate Click link below to Download
    ADC121S655 12-Bit, 200 kSPS to 500 kSPS, Differential Input, Micro Power A/D Converter 540
    Kbytes    		 11-May-07 Download

    If you have trouble printing or viewing PDF file(s), see Printing Problems.


    Package Availability, Models, Samples & Pricing
    Part NumberPackageFactory Lead TimeModelsSamples &
    Electronic
    Orders    		Budgetary PricingStd
    Pack
    Size    		Package
    Marking
    Format
    TypePinsSpec.MSL
    Rating    		Peak
    Reflow    		RoHS
    Report    		CAD
    Symbols    		WeeksQtyQty$US each
    ADC121S655CIMMMINI SOIC8NOPB1260RoHS N/A Full productionN/A
    		Samples
    Buy Now     		1K+$1.70reel
    of
    1000    		ZXTT
    X2AC
    6 weeks2000
    ADC121S655CIMMXMINI SOIC8NOPB1260RoHS N/A Full productionN/A
    		 
    Buy Now     		1K+$1.70reel
    of
    3500    		ZXTT
    X2AC
    6 weeksN/A

    General Description

    The ADC121S655 is a 12-bit, 200 kSPS to 500 kSPS sampling Analog-to-Digital (A/D) converter that features a fully differential, high impedance analog input and an external reference. The reference voltage can be varied from 1.0V to VA, with a corresponding resolution between 244µV and VA divided by 4096.

    The output serial data is binary 2's complement and is compatible with several standards, such as SPI™, QSPI™, MICROWIRE™, and many common DSP serial interfaces. The differential input, low power consumption, and small size make the ADC121S655 ideal for direct connection to transducers in battery operated systems or remote data acquisition applications.

    Operating from a single 5V supply, the supply current when operating at 500 kSPS is typically 1.8 mA. The supply current drops down to 0.3 µA typically when the ADC121S655 enters power-down mode. The ADC121S655 is available in the MSOP-8 package. Operation is guaranteed over the industrial temperature range of −40°C to +105°C and clock rates of 3.2 MHz to 8 MHz.

    Reliability Metrics

    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    ADC121S655CIMMCMOS70184060010890004309006723
    ADC121S655CIMMXCMOS70184060010890004309006723

    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.


    [Information as of 7-Nov-2009]