MAX147
PRODUCTION+2.7V, Low-Power, 8-Channel, Serial 12-Bit ADCs
- Part Models
- 11
- 1ku List Price
- Starting From $3.85
Part Details
- 8-Channel Single-Ended or 4-Channel Differential Inputs
- Single-Supply Operation
- +2.7V to +3.6V (MAX146)
- +2.7V to +5.25V (MAX147)
- Internal 2.5V Reference (MAX146)
- Low Power
- 1.2mA (133ksps, 3V supply)
- 54µA (1ksps, 3V supply)
- 1µA (power-down mode)
- SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire Serial Interface
- Software-Configurable Unipolar or Bipolar Inputs
- 20-Pin DIP/SSOP Packages
The MAX146/MAX147 12-bit data-acquisition systems combine an 8-channel multiplexer, high-bandwidth track/hold, and serial interface with high conversion speed and low power consumption. The MAX146 operates from a single +2.7V to +3.6V supply; the MAX147 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 MAX146/MAX147 use either the internal clock or an external serial-interface clock to perform successive-approximation analog-to-digital conversions.
The MAX146 has an internal 2.5V reference, while the MAX147 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 MAX146/MAX147, 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 MAX146/MAX147 are available in 20-pin DIP and SSOP packages.
For 4-channel versions of these devices, see the MAX1246/MAX1247 data sheet.
Applications
- Battery-Powered Applications
- Data Acquisition
- Medical Instruments
- Pen Digitizers
- Portable Data Logging
- Process Control
Documentation
Data Sheet 1
Reliability Data 1
Technical Articles 3
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX147ACAP+ | 20-SSOP-5.3_MM | ||
| MAX147ACAP+T | 20-SSOP-5.3_MM | ||
| MAX147AEAP+ | 20-SSOP-5.3_MM | ||
| MAX147AEAP+T | 20-SSOP-5.3_MM | ||
| MAX147BCAP+ | 20-SSOP-5.3_MM | ||
| MAX147BCAP+T | 20-SSOP-5.3_MM | ||
| MAX147BCPP+ | 20-PDIP-300_MIL | ||
| MAX147BEAP+ | 20-SSOP-5.3_MM | ||
| MAX147BEAP+T | 20-SSOP-5.3_MM | ||
| MAX147CEAP+ | 20-SSOP-5.3_MM | ||
| MAX147CEAP+T | 20-SSOP-5.3_MM |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Multiplexed A/D Converters 4 | ||
| MAX1246 | PRODUCTION | +2.7V, Low-Power, 4-Channel, Serial 12-Bit ADCs in QSOP-16 |
| MAX144 | PRODUCTION | +2.7V, Low-Power, 2-Channel, 108ksps, Serial 12-Bit ADCs in 8-Pin µMAX |
| MAX11637 | PRODUCTION | 12-Bit, 300ksps ADCs with Differential Track/Hold, and Internal Reference |
| MAX11629 | PRODUCTION | 12-Bit, 300ksps ADCs with FIFO and Internal Reference |
Evaluation Kits
Evaluation Kit for the MAX146 and MAX147
Evaluation Kit for the MAX146 and MAX147
Resources
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