Overview
The ADS7038-Q1, produced by Texas Instruments, is an 8-channel, 12-bit, successive approximation register (SAR) analog-to-digital converter (ADC) designed for various applications, particularly in the automotive sector. This device is AEC-Q100 qualified, ensuring it meets stringent automotive standards. It features an internal oscillator for ADC conversion and supports both autonomous and single-shot conversion modes. The ADS7038-Q1 communicates via an SPI-compatible interface and includes built-in cyclic redundancy check (CRC) for data integrity during read/write operations and power-up configuration.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Number of Channels | 8 | - | - | - |
| Resolution | 12-bit | - | - | - |
| Sampling Rate | - | 1 MSPS | - | samples per second |
| Analog Supply Voltage (AVDD) | 2.35 V | 3.3 V | 5.5 V | V |
| Digital Supply Voltage (DVDD) | 1.65 V | 3.3 V | 5.5 V | V |
| Operating Temperature Range | -40°C | - | 125°C | °C |
| Package Size | - | - | 3 mm × 3 mm (WQFN) | mm |
| SPI Interface Speed | - | - | 60 MHz | Hz |
Key Features
- Configurable Channels: Up to 8 channels can be independently configured as analog inputs, digital inputs, or digital outputs.
- GPIOs: General Purpose Input/Output pins for I/O expansion, including open-drain and push-pull digital outputs.
- Analog Watchdog: Programmable thresholds per channel, event counter for transient rejection, and hysteresis.
- CRC Check: Built-in cyclic redundancy check for data read/write operations and power-up configuration.
- Programmable Averaging Filters: Programmable sample size for averaging and averaging with internal conversions.
- High-Speed SPI Interface: Supports up to 60 MHz interface speed.
- Internal Oscillator: For ADC conversion process.
- Turbo Comparator Mode: Speeds up to 3.2 MSPS.
Applications
- Battery Management Systems (BMS): For monitoring and controlling battery health.
- Automotive Cluster Displays: For various display and control functions in automotive dashboards.
- Inverter and Motor Controls: For precise control and monitoring in motor and inverter systems.
- Onboard (OBC) and Wireless Chargers: For charging systems in electric vehicles.
Q & A
- What is the resolution of the ADS7038-Q1 ADC?
The ADS7038-Q1 has a 12-bit resolution.
- How many channels does the ADS7038-Q1 support?
The device supports up to 8 channels.
- What is the sampling rate of the ADS7038-Q1?
The sampling rate is up to 1 MSPS.
- What are the operating voltage ranges for AVDD and DVDD?
AVDD: 2.35 V to 5.5 V, DVDD: 1.65 V to 5.5 V.
- What is the operating temperature range of the ADS7038-Q1?
The operating temperature range is from -40°C to +125°C.
- Does the ADS7038-Q1 have built-in data integrity checks?
Yes, it includes a built-in cyclic redundancy check (CRC) for data read/write operations and power-up configuration.
- What types of GPIOs are available on the ADS7038-Q1?
The device includes open-drain and push-pull digital outputs.
- Can the channels be configured independently?
Yes, the channels can be independently configured as analog inputs, digital inputs, or digital outputs.
- What is the purpose of the analog watchdog function?
The analog watchdog function uses event-triggered interrupts per channel with programmable high and low thresholds, hysteresis, and an event counter for transient rejection.
- What is the maximum speed of the SPI interface?
The SPI interface supports up to 60 MHz.
