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主要特征
应用/用途
Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) | 12 |
# Input Channels | 4 |
Conv. Rate (ksps) (max) | 133 |
Data Bus | SPI |
ADC Architecture | SAR |
Diff/S.E. Input | Both |
Internal VREF (V) (nominal) | 2.5 |
External VREF (V) (min) | 1 |
External VREF (V) (max) | 3.6 |
Unipolar VIN (V) (max) | 2.5 |
Bipolar VIN (±V) (max) | 1.25 |
INL (±LSB) | 1 |
Package/Pins | QSOP/16 |
Budgetary Price (See Notes) | 9.9 |
缩小
简化框图
Technical Docs
数据资料 | +2.7V、低功耗、4通道、串行12位ADC,QSOP-16封装 | Mar 08, 2002 |
支持和培训
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参量
Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) | 12 |
# Input Channels | 4 |
Conv. Rate (ksps) (max) | 133 |
Data Bus | SPI |
ADC Architecture | SAR |
Diff/S.E. Input | Both |
Internal VREF (V) (nominal) | 2.5 |
External VREF (V) (min) | 1 |
External VREF (V) (max) | 3.6 |
Unipolar VIN (V) (max) | 2.5 |
Bipolar VIN (±V) (max) | 1.25 |
INL (±LSB) | 1 |
Package/Pins | QSOP/16 |
Budgetary Price (See Notes) | 9.9 |
主要特征
- 4-Channel Single-Ended or 2-Channel Differential Inputs
- Single-Supply Operation:
- +2.7V to +3.6V (MAX1246)
- +2.7V to +5.25V (MAX1247)
- Internal 2.5V Reference (MAX1246)
- Low Power:
- 1.2mA (133ksps, 3V supply)
- 54µA (1ksps, 3V supply)
- 1µA (power-down mode)
- 1.2mA (133ksps, 3V supply)
- SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire Serial Interface
- Software-Configurable Unipolar or Bipolar Inputs
- 16-Pin QSOP Package (same area as 8-pin SO)
应用/用途
- 电池供电应用
- 数据采集
- 医疗仪器
- 笔输入量化器
- 便携式数据记录
- 过程控制
描述
The MAX1246/MAX1247 12-bit data-acquisition systems combine a 4-channel multiplexer, high-bandwidth track/hold, and serial interface with high conversion speed and low power consumption. The MAX1246 operates from a single +2.7V to +3.6V supply; the MAX1247 operates from a single +2.7V to +5.25V supply. Both devices' analog inputs are software configurable for unipolar/bipolar and single-ended/differential operation.
The 4-wire serial interface connects directly to SPI/QSPI and MICROWIRE devices without external logic. A serial strobe output allows direct connection to TMS320-family digital signal processors. The MAX1246/MAX1247 use either the internal clock or an external serial-interface clock to perform successive-approximation analog-to-digital conversions.
The MAX1246 has an internal 2.5V reference, while the MAX1247 requires an external reference. Both parts have a reference-buffer amplifier with a ±1.5% voltage-adjustment range. These devices provide a hard-wired SHDN-bar pin and a software-selectable power-down, and can be programmed to automatically shut down at the end of a conversion. Accessing the serial interface automatically powers up the MAX1246/MAX1247, and the quick turn-on time allows them to be shut down between all conversions. This technique can cut supply current to under 60µA at reduced sampling rates. The MAX1246/MAX1247 are available in a 16-pin DIP and a small QSOP that occupies the same board area as an 8-pin SO.
For 8-channel versions of these devices, see the MAX146/MAX147 data sheet.
The 4-wire serial interface connects directly to SPI/QSPI and MICROWIRE devices without external logic. A serial strobe output allows direct connection to TMS320-family digital signal processors. The MAX1246/MAX1247 use either the internal clock or an external serial-interface clock to perform successive-approximation analog-to-digital conversions.
The MAX1246 has an internal 2.5V reference, while the MAX1247 requires an external reference. Both parts have a reference-buffer amplifier with a ±1.5% voltage-adjustment range. These devices provide a hard-wired SHDN-bar pin and a software-selectable power-down, and can be programmed to automatically shut down at the end of a conversion. Accessing the serial interface automatically powers up the MAX1246/MAX1247, and the quick turn-on time allows them to be shut down between all conversions. This technique can cut supply current to under 60µA at reduced sampling rates. The MAX1246/MAX1247 are available in a 16-pin DIP and a small QSOP that occupies the same board area as an 8-pin SO.
For 8-channel versions of these devices, see the MAX146/MAX147 data sheet.
Technical Docs
数据资料 | +2.7V、低功耗、4通道、串行12位ADC,QSOP-16封装 | Mar 08, 2002 |
支持和培训
采样:
选择上方“样片”按钮将重定向至第三方ADI样片网站。登录后,所选部件将转移到您在此网站上的购物车。如果您之前从未使用过此网站,请创建一个新帐户。有关此样片网站的任何问题,请联系SampleSupport@analog.com。