| TC3401 Description | | The TC3401 is a low cost, low power analog-to-digital converter based on Microchip’s Sigma-Delta technology. It will perform 16-bit conversions (15-bit plus sign) at up to eight per second. The TC3401 is optimized for use as a microcontroller peripheral in low cost, battery operated systems. A voltage reference is included, or an external reference can be used. A VDD monitor with reset generator provides Power-On Reset and Brown-out protection while an extra threshold detector is suitable for use as an early warning power fail detector, or as a wake-up timer. The TC3401’s 2-wire MicroPort™ digital interface is used for starting conversions and for reading out the data. Driving the SCLK line low starts a conversion. After the conversion starts, each additional falling edge (up to six) detected on SCLK for t4 seconds reduces the A/D resolution by one bit and cuts conversion time in half. After a conversion is completed, clocking the SCLK line puts the MSB through LSB of the resulting data word onto the SDAT line, much like a shift register. The part automatically sleeps when not performing a data conversion. The TC3401 is available in a 16-Pin PDIP and a 16-Pin QSOP package. | | TC3401 Vendor | | Microchip | | TC3401 Categories | | | TC3401 Features | - 16-Bit Resolution at Eight Conversions Per Second,
Adjustable Down to 10-Bit Resolution at 512
Conversions Per Second
- 1.8V – 5.5V Operation
Low Power Operating...............300A
Sleep...............50A
- MicroPort™ Serial Bus Requires Only Two Interface Lines
- Uses Internal or External Reference
- Automatically Enters Sleep Mode When Not In Use
- True Differential Inputs with Built-In Multiplexer Provide
Ratiometric Conversions
- VDD Monitor and Reset Generator Operational
in Shutdown Mode
- Early Warning Power Fail Detector, Also Suitable
as Wake-Up Timer Operational in Shutdown Mode
| | TC3401 Datasheet and Application Notes | | | Parameter | Value | | Typical Supply Current (µA) | 300 | | Typical INL (%FSR) | 0.0038 | | Max Sampling Rate (samples/sec) | >400 | | Input Type | 2 Differential | | Resolution (bits) | 10 to 16 | | Interface | 2-wire | | Supply Voltage Range (V) | 1.8 to 5.5 - 0 to +85 |
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