Maxim Integrated MAX1231BETI+, 12-bit SAR ADC, 300k sampling rate, SPI, 8 or 16 differential/single-ended inputs, internal temperature sensor, 2.7V–3.6V supply, -40°C to 85°C, 28-TQFN (5x5).
| Parameter / Attribute | Specification / Value |
|---|---|
| Input type | Differential, Single Ended |
| Mounting | Surface Mount |
| Reference type | External, Internal |
| Voltage - supply, analog | 2.7V ~ 3.6V |
| Voltage - supply, digital | 2.7V ~ 3.6V |
| I/O channels | 8, 16 |
| Data interface | SPI |
| Operating temperature | -40°C ~ 85°C |
| Package | Tube |
| Features | Temperature Sensor |
| Architecture | SAR |
| Configuration | S/H-ADC |
| Number of bits | 12 |
| Case | 28-WFQFN Exposed Pad |
| Ratio - s (H:ADC) | 1:1 |
| Number of a (D converters) | 1 |
| Sampling rate (Per second) | 300k |
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The integrated temperature sensor reports the die temperature directly through the ADC. If your system needs to monitor ambient temperature for fan control, thermal derating, or compensation of external sensors, this feature eliminates a separate thermistor or RTD and its signal-conditioning circuit. The sensor reading is available on a dedicated input channel through the same SPI interface.
Yes, it includes an on-chip temperature sensor that reports die temperature through the ADC over the SPI interface.
Yes, the digital supply range of 2.7V to 3.6V means the SPI interface operates at 3.3V logic levels directly — no level shifting needed.
Within the same Maxim family, the MAX1231 (without the BETI+ suffix) is functionally similar but may differ in package or temperature grade. Verify pin compatibility against the specific variant datasheet before substituting.