ADS7138-Q1

The ADS7138-Q1 is a high-precision, 12-bit, low-power analog-to-digital converter (ADC) designed for automotive and industrial applications requiring robust performance in harsh environments. It features a successive approximation register (SAR) architecture that delivers accurate conversion results with a throughput rate of up to 500 kSPS, ensuring fast and reliable data acquisition from multiple analog inputs. This device supports four differential or eight single-ended input channels, allowing flexible signal conditioning for sensors such as temperature, pressure, current, and voltage. Its integrated self-calibration circuitry minimizes offset and gain errors over time and temperature, maintaining high linearity and accuracy across the full operating range. The internal reference voltage of 2.5 V provides stable conversion results without the need for external precision references, simplifying system design. Designed for reliability in demanding conditions, the ADS7138-Q1 meets AEC-Q100 Grade 1 qualification standards, making it suitable for use in automotive systems like battery management, powertrain control, and telematics. It operates from a single 3.3 V supply and consumes only 60 µA in active mode and 0.4 µA in shutdown mode, offering excellent power efficiency critical for battery-powered and energy-sensitive applications. The ADC includes a programmable digital filter to reduce noise and improve resolution when needed, and its I²C-compatible serial interface enables easy integration with microcontrollers or processors. The device also supports configurable channel sequencing, enabling automatic scanning of multiple inputs without CPU intervention. Additional features include built-in diagnostics, watchdog timer functionality, and fault detection mechanisms to enhance system safety and reliability. With an operating temperature range from –40°C to +125°C, the ADS7138-Q1 performs consistently under extreme thermal conditions typical in automotive and industrial environments. Its compact 16-pin WQFN package ensures minimal footprint on PCBs while maintaining thermal and electrical performance. These attributes make it ideal for applications such as electric vehicle battery monitoring, motor control, and industrial sensor interfaces where precision, durability, and low power are essential.