尺寸最小的低功耗、并行输出、12位ADC
The MAX1295/MAX1297 low-power, 12-bit analog-to-digital converters (ADCs) feature a successive-approximation ADC, automatic power-down, fast wake-up (2µs), an on-chip clock, +2.5V internal reference, and a high-speed 12-bit parallel interface. They operate with a single +2.7V to +3.6V analog supply. Power consumption is only 5.4mW at the maximum sampling rate of 265ksps. Two software-selectable power-down modes enable the MAX1295/MAX1297 to be shut down between conversions; accessing the parallel interface returns them to normal operation. Powering down between conversions can reduce supply current below 10µA at lower sampling rates. Both devices offer software-configurable analog inputs for unipolar/bipolar and single-ended/pseudo-differential operation. In single-ended mode, the MAX1295 has six input channels and the MAX1297 has two (three input channels and one input channel, respectively, when in pseudo-differential mode). Excellent dynamic performance and low power, combined with ease of use and small package size, make these converters ideal for battery-powered and data-acquisition applications or for other circuits with demanding power-consumption and space requirements. The MAX1295/MAX1297 tri-states active-low INT when active-low CS goes high. Refer to MAX1265/MAX1267 if tri-stating active-low INT is not desired. The MAX1295 is offered in a 28-pin QSOP package, while the MAX1297 comes in a 24-pin QSOP. For pin-compatible +5V, 12-bit versions, refer to the MAX1294/MAX1296 data sheet.
关键特性
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| 语言 | 下载文件 | 备注 |
|---|---|---|
| 英文 | MAX1295-MAX1297.pdf | Rev 3; 04/2003 |
| Part Number | Resolution (bits) | Input Chan. | Conv. Rate (ksps) | ADC Architecture | Data Bus | Diff/S.E. Input | Internal VREF (V) | External VREF (V) | External VREF (V) | Unipolar VIN (V) | Bipolar VIN (±V) | THD (dB) | INL (±LSB) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ADC | max | nominal | min | max | max | max | See Notes | ||||||||
| MAX1295 | 12 | 6 | 265 | SAR | µP/12 | Both | 2.5 | 1 | 3.6 | 2.5 | 1.25 | -78 | 1 | QSOP/28 | $8.86 @1k |
| MAX1297 | 2 | QSOP/24 | $8.89 @1k | ||||||||||||
| 型号 | 状况 | 推荐替代产品 | 封装 | 温度 | RoHS/无铅 |
|---|---|---|---|---|---|
| MAX1297ACEG | 停止供货 | MAX1297ACEG+ | QSOP,；24引脚；54.2mm² | 0°C至+70°C | RoHS/无铅：否 |
| MAX1297ACEG+ | 生产中 | QSOP,；24引脚；54.2mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX1297ACEG+T | 生产中 | QSOP,；24引脚；54.2mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX1297ACEG-T | 停止供货 | MAX1297ACEG+T | QSOP；24引脚 | 0°C至+70°C | 参考数据资料 |
| MAX1297AEEG | 停止供货 | MAX1297AEEG+ | QSOP,；24引脚；54.2mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX1297AEEG+ | 生产中 | QSOP,；24引脚；54.2mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1297AEEG+T | 生产中 | QSOP,；24引脚；54.2mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1297AEEG-T | 停止供货 | MAX1297AEEG+T | QSOP；24引脚 | -40°C至+85°C | 参考数据资料 |
| MAX1297BCEG | 停止供货 | MAX1297BCEG+ | QSOP,；24引脚；54.2mm² | 0°C至+70°C | RoHS/无铅：否 |
| MAX1297BCEG+ | 生产中 | QSOP,；24引脚；54.2mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| 型号 | 状况 | 推荐替代产品 | 封装：类型 引脚 占位面积封装图 编码/变更 * | 温度 | RoHS/无铅？ |
| MAX1297BCEG+T | 生产中 | QSOP；24引脚 | 0°C至+70°C | 参考数据资料 | |
| MAX1297BCEG-T | 停止供货 | MAX1297BCEG+T | QSOP,；24引脚；54.2mm² | 0°C至+70°C | RoHS/无铅：否 |
| MAX1297BEEG | 停止供货 | MAX1297BEEG+ | QSOP,；24引脚；54.2mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX1297BEEG+ | 生产中 | QSOP,；24引脚；54.2mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1297BEEG+T | 生产中 | QSOP,；24引脚；54.2mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX1297BEEG-T | 停止供货 | MAX1297BEEG+T | QSOP；24引脚 | -40°C至+85°C | 参考数据资料 |
