ABCelectronique : portail d'information dans le domaine de l'électronique
 
 
Numéro de sérieLTC2305
CategorieData Conversion => DAC (Digital to Analog Converters) => 10-14 bit => 12 bit
Description2-Channel, 12-Bit ADCs With I2C Compatible Interface
The LTC®2301/LTC2305 are low noise, low power, 1-/2- channel, 12-bit successive approximation ADCs with an I2C compatible serial interface. These ADCs include an internal reference and a fully differential sample-and-hold circuit to reduce common-mode noise. The LTC2301/LTC2305 operate from an internal clock to achieve a fast 1.3?s conversion time.
SociétéLinear Technology Corporation
DatasheetTélécharger LTC2305 datasheet
 
 
  • Description courte
  • FEATURES

    The LTC®2301/LTC2305 are low noise, low power, 1-/2channel, 12-bit successive approximation ADCs with an I2C compatible serial interface. These ADCs include an internal reference and a fully differential sample-and-hold circuit to reduce common-mode noise. The LTC2301/LTC2305 operate from an internal clock to achieve a fast 1.3s conversion time. The LTC2301/LTC2305 operate from a single 5V supply and draw just at a throughput rate of 1ksps. The ADC enters nap mode when not converting, reducing the power dissipation. The LTC2301/LTC2305 are available in small × 3mm DFN and 12-pin MSOP packages. The internal 2.5V reference further reduces PCB board space requirements. The low power consumption and small size make the LTC2301/LTC2305 ideal for battery operated and portable applications, while the 2-wire I2C compatible serial interface makes these ADCs a good match for space-constrained systems.

    12-Bit Resolution Low Power: 1ksps, 35W Sleep Mode 14ksps Throughput Rate Internal Reference Low Noise: SNR = 73.5dB Guaranteed No Missing Codes Single 5V Supply 2-wire I2C Compatible Serial Interface with 9 Addresses Plus One Global for Synchronization Fast Conversion Time: 1-Channel (LTC2301) and 2-Channel (LTC2305) Versions Unipolar or Bipolar Input Ranges (Software Selectable) Internal Conversion Clock Guaranteed Operation from to 125°C (MSOP Package) × 3mm DFN and 12-Pin MSOP Packages

    APPLICATIONS

    Industrial Process Control Motor Control Accelerometer Measurements Battery Operated Instruments Isolated and/or Remote Data Acquisition Power Supply Monitoring

    L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.

    LTC2305 CH0(IN+) ANALOG INPUT TO 4.096V UNIPOLAR CH1(IN+) ±2.048V BIPOLAR ANALOG INPUT MUX + ­ VDD AD1 AD0 SCL SDA VREF 2.2F

    Supply Voltage (VDD)................................ to 6.0V Analog Input Voltage CH0(IN+), CH1(IN­), REF, REFCOMP.....................(GND 0.3V) to (VDD + 0.3V) Digital Input Voltage..........(GND 0.3V) to (VDD + 0.3V) Digital Output Voltage.......(GND 0.3V) to (VDD + 0.3V)

    Power Dissipation...............................................500mW Operating Temperature Range 85°C LTC2301H/LTC2305H (Note to 125°C Storage Temperature Range................... to 150°C

    DE PACKAGE × 3mm) PLASTIC DFN TJMAX = 43°C/W EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
    DE PACKAGE × 3mm) PLASTIC DFN TJMAX = 43°C/W EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB

    LEAD FREE FINISH LTC2301HMS#PBF LTC2305CMS#PBF TAPE AND REEL LTC2301HMS#TRPBF LTC2305CMS#TRPBF PART MARKING* PACKAGE DESCRIPTION × 4mm) Plastic DFN × 4mm) Plastic DFN × 4mm) Plastic DFN × 4mm) Plastic DFN 12-Lead Plastic MSOP 12-Lead Plastic MSOP 12-Lead Plastic MSOP 12-Lead Plastic MSOP TEMPERATURE RANGE to 70°C

    LEAD FREE FINISH LTC2305IMS#PBF LTC2305HMS#PBF TAPE AND REEL LTC2305IMS#TRPBF LTC2305HMS#TRPBF PART MARKING* 2305 PACKAGE DESCRIPTION 12-Lead Plastic MSOP 12-Lead Plastic MSOP TEMPERATURE RANGE to 125°C

    Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/

    The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are = 25°C. (Note 4)

    PARAMETER Resolution (No Missing Codes) Integral Linearity Error Differential Linearity Error Bipolar Zero Error Bipolar Zero Error Drift Unipolar Zero Error Unipolar Zero Error Drift Unipolar Zero Error Match (LTC2305) Bipolar Full-Scale Error Bipolar Full-Scale Error Drift Unipolar Full-Scale Error Unipolar Full-Scale Error Drift Unipolar Full-Scale Error Match (LTC2305) External Reference (Note 7) REFCOMP = 4.096V (Note 7) External Reference External Reference (Note 7) REFCOMP = 4.096V (Note 7) External Reference

    UNITS Bits LSB LSB/°C LSB LSB/°C LSB LSB/°C LSB LSB/°C LSB
    SYMBOL VIN+ VIN­ VIN+ ­ VIN­ IIN CIN CMRR PARAMETER

    The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are = 25°C. (Note 4)

    CONDITIONS (Note 8) Unipolar (Note 8) Bipolar (Note 8) VIN = VIN+ ­ VIN­ (Unipolar) VIN = VIN+ ­ VIN­ (Bipolar) Sample Mode Hold Mode

    Absolute Input Range (CH0, CH1, IN+) Absolute Input Range (CH0, CH1, IN­) Input Differential Voltage Range Analog Input Leakage Current Analog Input Capacitance Input Common Mode Rejection Ratio