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微处理器兼容、660ns、8位ADC,带有采样/保持

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主要特征

应用/用途

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 8
# Input Channels 1
Conv. Rate (ksps) (max) 500
Data Bus µP/8
ADC Architecture SAR
Diff/S.E. Input S.E. Only
Internal VREF (V) (nominal) 5
Unipolar VIN (V) (max) 5
Package/Pins PDIP/20
SOIC (W)/20
Budgetary
Price (See Notes)
9.52
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参量

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 8
# Input Channels 1
Conv. Rate (ksps) (max) 500
Data Bus µP/8
ADC Architecture SAR
Diff/S.E. Input S.E. Only
Internal VREF (V) (nominal) 5
Unipolar VIN (V) (max) 5
Package/Pins PDIP/20
SOIC (W)/20
Budgetary
Price (See Notes)
9.52

主要特征

  • 660ns Conversion Time
  • 20-Pin Narrow DIP Package
  • No External Clock
  • Pin-Compatible Upgrade for Industry-Standard 7820
  • 100kHz Input Signal Bandwidth
  • Bipolar/Unipolar Inputs
  • Single +5V or Dual ±5V Supplies
  • Ratiometric Reference Inputs
  • Static and Dynamic Tested
  • Internal Track/Hold

应用/用途

  • Audio Systems
  • Digital-Signal Processing
  • High-Speed Data Acquisition
  • High-Speed Servo Loops
  • Telecommunications

描述

The MX7821 high-speed, microprocessor-compatible (μP), 8-bit analog-to-digital converter (ADC) is a plug-in upgrade fro the industry-standard 7820. The MX7821 uses a half-flash technique, resulting in a 660ns conversion time vs. 1.36μs for the 7820. A VSS pin, not supplied by the 7820, supports dual power supplies and bipolar analog inputs.

The MX7821 has track-and-hold function capable of digitizing a 100kHz signal, and is tested for both its static and dynamic capability. The converter-μP interface appears as a memory location or input/output port that requires no external interface logic. The data outputs use latched, three-state buffered circuitry for direct connection to a μP data bus or system input port. The MX7821 has an overflow output for cascading devices to attain higher resolution. The ADC's input/reference arrangement enables ratiometric operation. For a detailed description of MX7821 operation, refer to the MX7820 data sheet.

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MX7821:功能框图 MX7821:功能框图 Zoom icon

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