MAX128, MAX128A, MAX128B
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
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主な特長
アプリケーション/用途
| 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) | 4.096 |
| Bipolar VIN (±V) (max) | 2.048 |
| INL (±LSB) | 1 |
| Package/Pins | PDIP/24 SSOP/28 |
| Budgetary Price (See Notes) | 12.88 |
簡易ブロック図
技術資料
| データシート | 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 | Jan 06, 2015 |
パラメーター
| 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) | 4.096 |
| Bipolar VIN (±V) (max) | 2.048 |
| INL (±LSB) | 1 |
| Package/Pins | PDIP/24 SSOP/28 |
| Budgetary Price (See Notes) | 12.88 |
主な特長
- 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.
技術資料
| データシート | 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 | Jan 06, 2015 |
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