This device is a time-to-digital converter with a built-in amplifier and comparator for ultrasonic heat and flow meter applications. It supports automatic differential time-of-flight measurement with 20 ps accuracy and 3.8 ps resolution, and it integrates analog switches, an autozero amplifier/comparator, and a real-time clock. The MAX35101 operates from a 2.3 V to 3.6 V single supply and supports up to four 2-wire PT1000 or PT500 RTD sensors for temperature measurement. It also includes 8 KB of nonvolatile flash memory, a 4-wire SPI interface, and a 32-pin 5 mm x 5 mm TQFP package rated for -40°C to +85°C operation.
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Analog Devices MAX35101 technical specifications.
| Time-to-digital accuracy | 20ps |
| Time measurement resolution | 3.8ps |
| Measurement range | 8 to 8000µs |
| Supply voltage | 2.3 to 3.6V |
| Operating temperature | -40 to 85°C |
| Interface | 4-wire SPI |
| Supported RTD sensors | Up to 4 two-wire PT1000/PT500 |
| Nonvolatile flash memory | 8KB |
| Package | 32-pin TQFP, 5 mm x 5 mm |
| SPI clock frequency | 20 at VCC ≥ 3.0 V; 10 at VCC = 2.3 VMHz |
| 32 kHz oscillator frequency | 32.768kHz |
| 4 MHz crystal frequency | 4.000MHz |
| RoHS | ROHS3 Compliant |
| REACH | REACH Unaffected |
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