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.
title | Download file |
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MAX146-MAX147 Data Sheet | MAX146-MAX147.pdf |
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 |
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ADC | max | nominal | min | max | max | max | See Notes | ||||||||
MAX146 | 12 | 8 | 133 | SAR | SPI | Both | 2.5 | 1 | 3.6 | 2.5 | 1.25 | -88 | 1 | CDIP(N)/20 PDIP(N)/20 SSOP/20 | $9.04 @1k |
MAX147 | 5.25 | CDIP(N)/20 PDIP(N)/20 SSOP/20 | $2.81 @1k | ||||||||||||
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
---|---|---|---|---|---|
MAX146ACAP | No Longer Available | MAX146ACAP+ | SSOP,;20 pin;57.9 mm² | 0°C to +70°C | No |
MAX146ACAP+ | Active | SSOP,;20 pin;57.9 mm² | 0°C to +70°C | Lead Free | |
MAX146ACAP+T | Active | SSOP,;20 pin;57.9 mm² | 0°C to +70°C | Lead Free | |
MAX146ACAP-T | No Longer Available | MAX146ACAP+T | SSOP;20 pin | 0°C to +70°C | See data sheet |
MAX146ACPP | No Longer Available | MAX146ACPP+ | PDIP(N),;20 pin;219.2 mm² | 0°C to +70°C | No |
MAX146ACPP+ | Active | PDIP(N),;20 pin;219.2 mm² | 0°C to +70°C | Lead Free | |
MAX146AEAP | No Longer Available | MAX146AEAP+ | SSOP,;20 pin;57.9 mm² | -40°C to +85°C | No |
MAX146AEAP+ | Active | SSOP,;20 pin;57.9 mm² | -40°C to +85°C | Lead Free | |
MAX146AEAP+T | Active | SSOP,;20 pin;57.9 mm² | -40°C to +85°C | Lead Free | |
MAX146AEAP-T | No Longer Available | MAX146AEAP+T | SSOP;20 pin | -40°C to +85°C | See data sheet |
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
MAX146AEPP | No Longer Available | MAX146AEPP+ | PDIP(N),;20 pin;219.2 mm² | -40°C to +85°C | No |
MAX146AEPP+ | Active | PDIP(N),;20 pin;219.2 mm² | -40°C to +85°C | Lead Free | |
MAX146AMJP | No Longer Available | CDIP(N),;20 pin;218.9 mm² | -55°C to +125°C | No | |
MAX146BCAP | No Longer Available | MAX146BCAP+ | SSOP,;20 pin;57.9 mm² | 0°C to +70°C | No |
MAX146BCAP+ | Active | SSOP,;20 pin;57.9 mm² | 0°C to +70°C | Lead Free | |
MAX146BCAP+T | Active | SSOP,;20 pin;57.9 mm² | 0°C to +70°C | Lead Free | |
MAX146BCAP-T | No Longer Available | MAX146BCAP+T | SSOP,;20 pin;57.9 mm² | 0°C to +70°C | No |
MAX146BCPP | No Longer Available | MAX146BCPP+ | PDIP(N),;20 pin;219.2 mm² | 0°C to +70°C | No |
MAX146BCPP+ | Active | PDIP(N),;20 pin;219.2 mm² | 0°C to +70°C | Lead Free | |
MAX146BEAP | No Longer Available | MAX146BEAP+ | SSOP,;20 pin;57.9 mm² | -40°C to +85°C | No |
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
MAX146BEAP+ | Active | SSOP,;20 pin;57.9 mm² | -40°C to +85°C | Lead Free | |
MAX146BEAP+T | Active | SSOP,;20 pin;57.9 mm² | -40°C to +85°C | Lead Free | |
MAX146BEAP-T | No Longer Available | MAX146BEAP+T | SSOP,;20 pin;57.9 mm² | -40°C to +85°C | No |
MAX146BEAP/GH9 | No Longer Available | MAX146BEAP+ | SSOP,;20 pin;57.9 mm² | -40°C to +85°C | No |
MAX146BEAP/GH9-T | No Longer Available | MAX146BEAP+ | SSOP,;20 pin;57.9 mm² | -40°C to +85°C | No |
MAX146BEPP | No Longer Available | MAX146BEPP+ | PDIP(N),;20 pin;219.2 mm² | -40°C to +85°C | No |
MAX146BEPP+ | Active | PDIP(N),;20 pin;219.2 mm² | -40°C to +85°C | Lead Free | |
MAX146BMJP | No Longer Available | CDIP(N),;20 pin;218.9 mm² | -55°C to +125°C | No |