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マルチレンジ、+5V、12ビットDAS、2線式シリアルインタフェース付

初の2線式12ビット、8チャネル、シリアルADC、±17Vフォルト保護入力付き

製品の詳細

The MAX127/MAX128 are multirange, 12-bit data acquisition systems (DAS) that require only a single +5V supply for operation, yet accept signals at their analog inputs that may span above the power-supply rail and below ground. These systems provide eight analog input channels that are independently software programmable for a variety of ranges: ±10V, ±5V, 0 to +10V, 0 to +5V for the MAX127; and ±VREF, ±VREF/2, 0 to +VREF, 0 to +VREF/2 for the MAX128. This range switching increases the effective dynamic range to 14 bits and provides the flexibility to interface 4–20mA, ±12V, and ±15V-powered sensors directly to a single +5V system. In addition, these converters are fault protected to ±16.5V; a fault condition on any channel will not affect the conversion result of the selected channel. Other features include a 5MHz bandwidth track/hold, an 8ksps throughput rate, and the option of an internal 4.096V or external reference.

The MAX127/MAX128 feature a 2-wire, I2C-compatible serial interface that allows communication among multiple devices using SDA and SCL lines.

A hardware shutdown input (SHDN) and two software-programmable power-down modes (standby and full power-down) are provided for low-current shutdown between conversions. In standby mode, the reference buffer remains active, eliminating startup delays.

The MAX127/MAX128 are available in 24-pin narrow PDIP or space-saving 28-pin SSOP packages.

主な機能

  • 12-Bit Resolution, 1/2 LSB Linearity
  • +5V Single-Supply Operation
  • I2C-Compatible, 2-Wire Serial Interface
  • Four Software-Selectable Input Ranges
    • MAX127: 0 to +10V, 0 to +5V, ±10V, ±5V
    • MAX128: 0 to +VREF, 0 to +VREF/2, ±VREF, ±VREF/2
  • 8 Analog Input Channels
  • 8ksps Sampling Rate
  • ±16.5V Overvoltage-Tolerant Input Multiplexer
  • Internal 4.096V or External Reference
  • Two Power-Down Modes
  • 24-Pin Narrow PDIP or 28-Pin SSOP Packages

アプリケーション/用途

  • バッテリ駆動アプリケーション
  • データ収集
  • 産業用制御システム
  • ロボット工学
Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 8
Conv. Rate (ksps) (max) 8
Data Bus I2C
ADC Architecture SAR
Diff/S.E. Input S.E. Only
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 2.4
External VREF (V) (max) 4.18
Unipolar VIN (V) (max) 10
Bipolar VIN (±V) (max) 10
INL (±LSB) 1
Package/Pins PDIP/24
SSOP/28
Budgetary
Price (See Notes)
$14.64 @1k
全て表示する

簡略化されたブロック図

MAX127、MAX127A、MAX127B、MAX128、MAX128A、MAX128B:標準動作回路 MAX127、MAX127A、MAX127B、MAX128、MAX128A、MAX128B:標準動作回路 Zoom icon

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パラメーター

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 8
Conv. Rate (ksps) (max) 8
Data Bus I2C
ADC Architecture SAR
Diff/S.E. Input S.E. Only
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 2.4
External VREF (V) (max) 4.18
Unipolar VIN (V) (max) 10
Bipolar VIN (±V) (max) 10
INL (±LSB) 1
Package/Pins PDIP/24
SSOP/28
Budgetary
Price (See Notes)
$14.64 @1k

主な機能

  • 12-Bit Resolution, 1/2 LSB Linearity
  • +5V Single-Supply Operation
  • I2C-Compatible, 2-Wire Serial Interface
  • Four Software-Selectable Input Ranges
    • MAX127: 0 to +10V, 0 to +5V, ±10V, ±5V
    • MAX128: 0 to +VREF, 0 to +VREF/2, ±VREF, ±VREF/2
  • 8 Analog Input Channels
  • 8ksps Sampling Rate
  • ±16.5V Overvoltage-Tolerant Input Multiplexer
  • Internal 4.096V or External Reference
  • Two Power-Down Modes
  • 24-Pin Narrow PDIP or 28-Pin SSOP Packages

アプリケーション/用途

  • バッテリ駆動アプリケーション
  • データ収集
  • 産業用制御システム
  • ロボット工学

説明

The MAX127/MAX128 are multirange, 12-bit data acquisition systems (DAS) that require only a single +5V supply for operation, yet accept signals at their analog inputs that may span above the power-supply rail and below ground. These systems provide eight analog input channels that are independently software programmable for a variety of ranges: ±10V, ±5V, 0 to +10V, 0 to +5V for the MAX127; and ±VREF, ±VREF/2, 0 to +VREF, 0 to +VREF/2 for the MAX128. This range switching increases the effective dynamic range to 14 bits and provides the flexibility to interface 4–20mA, ±12V, and ±15V-powered sensors directly to a single +5V system. In addition, these converters are fault protected to ±16.5V; a fault condition on any channel will not affect the conversion result of the selected channel. Other features include a 5MHz bandwidth track/hold, an 8ksps throughput rate, and the option of an internal 4.096V or external reference.

The MAX127/MAX128 feature a 2-wire, I2C-compatible serial interface that allows communication among multiple devices using SDA and SCL lines.

A hardware shutdown input (SHDN) and two software-programmable power-down modes (standby and full power-down) are provided for low-current shutdown between conversions. In standby mode, the reference buffer remains active, eliminating startup delays.

The MAX127/MAX128 are available in 24-pin narrow PDIP or space-saving 28-pin SSOP packages.

簡略化されたブロック図

MAX127、MAX127A、MAX127B、MAX128、MAX128A、MAX128B:標準動作回路 MAX127、MAX127A、MAX127B、MAX128、MAX128A、MAX128B:標準動作回路 Zoom icon

技術資料

サポートとトレーニング

ナレッジベースを検索して技術質問への回答を探す。

絞り込まれた検索

マキシムでは、お客様の技術的質問にお答えするため、アプリケーションエンジニアの専任チームも配置しています。 サポートセンター をご覧ください。