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14位ADC,200ksps、+5V单电源供电,内置电压基准

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主要特征

应用/用途

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 14
# Input Channels 1
Conv. Rate (ksps) (max) 200
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input S.E. Only
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 3
External VREF (V) (max) 4.2
Unipolar VIN (V) (max) 12
Bipolar VIN (±V) (max) 12
INL (±LSB) 1
Package/Pins SSOP/20
Budgetary
Price (See Notes)
9.12
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参量

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 14
# Input Channels 1
Conv. Rate (ksps) (max) 200
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input S.E. Only
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 3
External VREF (V) (max) 4.2
Unipolar VIN (V) (max) 12
Bipolar VIN (±V) (max) 12
INL (±LSB) 1
Package/Pins SSOP/20
Budgetary
Price (See Notes)
9.12

主要特征

  • 200ksps (bipolar) and 150ksps (unipolar) Sampling ADC
  • 14-Bits, No Missing Codes
  • 1LSB INL Guaranteed
  • 81dB (min) SINAD
  • +5V Single-Supply Operation
  • Low Power Operation, 7.5mA (Unipolar Mode)
  • 2.5µA Shutdown Mode
  • Software-Configurable Unipolar & Bipolar Input Ranges
    • 0 to +12V and ±12V (MAX1142)
    • 0 to +4.096V and ±4.096V (MAX1143)
    • Internal or External Reference
  • Internal or External Clock
  • SPI/QSPI/MICROWIRE-Compatible Wire Serial Interface
  • Three User-Programmable Logic Outputs
  • Small 20-Pin SSOP Package

应用/用途

  • 数据采集

描述

The MAX1142/MAX1143 are 200ksps, 14-bit ADCs. These serially interfaced ADCs connect directly to SPI™, QSPI™, and MICROWIRE™ devices without external logic. They combine an input scaling network, internal track/hold, a clock, +4.096V reference, and three general-purpose digital output pins (for external multiplexer or PGA control) in a 20-pin SSOP package. The excellent dynamic performance (SINAD > 81dB), high-speed (200ksps), and low power (7.5mA) of these ADCs, make them ideal for applications such as industrial process control, instrumentation, and medical applications. The MAX1142 accepts input signals of 0 to +12V (unipolar) or ±12V (bipolar), while the MAX1143 accepts input signals of 0 to +4.096V (unipolar) or ±4.096V (bipolar). Operating from a single +4.75V to +5.25V analog supply and a +4.75V to +5.25V digital supply, power-down modes reduce current consumption to 1mA at 10ksps and further reduce supply current to less than 20µA at slower data rates. A serial strobe output (SSTRB) allows direct connection to the TMS320-family of digital signal processors. The MAX1142/MAX1143 user can select either the internal clock, or an external serial-interface clock for the ADC to perform analog-to-digital conversions.

The MAX1142/MAX1143 feature internal calibration circuitry to correct linearity and offset errors. On-demand calibration allows the user to optimize performance. Three user-programmable logic outputs are provided for the control of an 8-channel MUX or a PGA.

简化框图

MAX1142、MAX1143:典型应用电路 MAX1142、MAX1143:典型应用电路 Zoom icon

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在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心