Electrical Characteristics¶
The electrical characteristic parameters of CI1312 are shown in the following table.
| Symbol | Description | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|---|
| VIN5V | PMU input pin voltage, generally 5V | 3.6 | 5 | 5.5 | V |
| AVDD | Analog and Codec power supply voltage | 2.97 | 3.3 | 3.63 | V |
| VDD33 | Chip IO power supply voltage | 2.97 | 3.3 | 3.63 | V |
| VDD11 | Chip core power supply voltage | 0.99 | 1.1 | 1.22 | V |
| VIH | Input high voltage, 3.0V ≤ VDD33 ≤ 3.6V | 0.7 * VDD33 | - | - | V |
| VIL | Input low voltage, 3.0V ≤ VDD33 ≤ 3.6V | - | - | 0.3 * VDD33 | V |
| VOL | Output low voltage @ IOL=12mA | - | - | 0.4 | V |
| VOH | Output high voltage @ IOH=20mA | 2.4 | - | - | V |
| I5VIO | Driving current when IO (5V withstand voltage) outputs 3.3V | 5 | - | 23 | mA |
| I33VIO | IO (3.3V withstand voltage) drive current when outputting 3.3V | 12 | - | 26 | mA |
| Σ IVDD | Sum of all IO total currents of the chip | - | - | 180 | mA |
| Pde | 5V power supply is adopted, 1.1V chip is powered by external DC-DC chip, and the total power consumption of 5V input during normal identification (ambient temperature TA=25 ° C) | 70 | - | 150 | mW |
| Pdi | 5V is used to supply power to the chip, and the chip uses internal PMU. The total power consumption of 5V input during normal identification (ambient temperature TA=25 ° C) | 145 | - | 250 | mW |
| RC oscillator accuracy 1 | TA=- 20 to 85 ° C | - 3 | - | +3 | % |
| RC oscillator accuracy 2 | TA=- 10 to 70 ° C | - 2.5 | - | +2.5 | % |
| Ta | The chip adopts an internal RC oscillator to adapt to the working environment temperature | - 10 | - | +70 | ℃ |
| Tst | Chip storage environment temperature | - 55 | - | +150 | ℃ |
The RC oscillator in the chip will produce a certain temperature drift with the change of ambient temperature. The temperature drift of the clock may affect the application requiring high-precision clock or the accuracy of serial communication with the host computer
The application scheme uses an internal RC oscillator as the clock source. The serial port communication baud rate must be less than or equal to 115200bps. The recommended working environment temperature is - 10 to 70 ℃. At the same time, the total deviation from the serial port baud rate of the host computer should not exceed 4% to ensure good communication. If the working environment temperature is - 10 to 70 ℃, the baud rate deviation of the matched host computer serial port must not exceed ± 1.5% in this temperature zone
When the upper computer is designed without crystal oscillator, the communication error should be minimized. Chipintelli can provide a serial port baud rate adaptive scheme, which requires adding a handshake command to the serial port protocol, and the upper computer ensures that it will reply according to the protocol requirements within 50ms after receiving the handshake command. After adding this adaptive scheme, the product can be used in scenarios where the working environment temperature is - 20 to 85 ℃
During SMT welding of chips, please control the temperature and time of the furnace. The temperature curve of a SMT welding is shown in the following figure.
The humidity sensitivity of the chip is MSL3. Please store it according to MSL3 conditions before use. If the storage time after unpacking exceeds the requirements of MSL3, please bake before SMT welding.