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ADS7138 8-ch ADC
ADS7138
Texas Instrumentsic data converter
The ADS7138 is an 8-channel, 12-bit ADC with I2C interface and GPIOs for analog inputs, digital inputs/outputs, and CRC functionality.
In stock
Specifications
8- Operating Voltage
- AVDD: 2.35 V to 5.5 V, DVDD: 1.65 V to 5.5 V
- Supply Current
- IAVDD = 150 µA (I2C high-speed mode), IAVDD = 45 µA (I2C fast mode plus)
- Interface
- I2C
- Resolution
- 12 bits
- Range
- 0 to AVDD - 0.3 V for AINx, 0 to DVDD + 0.1 V for VIN
- Accuracy
- ±0.75 LSB DNL, ±1.5 LSB INL
- Temperature Range
- -40°C to +125°C
- Package
- WQFN (16) 3.00 mm × 3.00 mm
Pinout
16| Pin | Name | Functions | Notes |
|---|---|---|---|
| AIN0 | Channel 0 | GPIOADC | Configurable as either an analog input (default) or a GPIO |
| AIN1 | Channel 1 | GPIOADC | Configurable as either an analog input (default) or a GPIO |
| AIN2 | Channel 2 | GPIOADC | Configurable as either an analog input (default) or a GPIO |
| AIN3 | Channel 3 | GPIOADC | Configurable as either an analog input (default) or a GPIO |
| AIN4 | Channel 4 | GPIOADC | Configurable as either an analog input (default) or a GPIO |
| AIN5 | Channel 5 | GPIOADC | Configurable as either an analog input (default) or a GPIO |
| AIN6 | Channel 6 | GPIOADC | Configurable as either an analog input (default) or a GPIO |
| AIN7 | Channel 7 | GPIOADC | Configurable as either an analog input (default) or a GPIO |
| ADDR | Address | GPIO | Input for selecting the device I2C address. |
| ALERT | Alert | GPIO | Open-drain (default) or push-pull output for the digital comparator |
| AVDD | Analog Supply Voltage | POWER | Connect a 1-µF decoupling capacitor to GND. |
| DECAP | Decap | — | Connect a 1-µF decoupling capacitor between the DECAP and GND pins for the internal power supply |
| DVDD | Digital Supply Voltage | POWER | Connect a 1-µF decoupling capacitor to GND. |
| GND | Ground | GND | Ground for the power supply; all analog and digital signals are referred to this pin voltage |
| SDA | Serial Data Input/Output | I2C | Serial data input or output for the I2C interface |
| SCL | Serial Clock | I2C | Serial clock for the I2C interface |
Interactive pinout
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ADS7138
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