Overview
The ADS7040IDCUR, produced by Texas Instruments, is an ultra-low power, ultra-small size, 8-bit analog-to-digital converter (ADC) with a successive-approximation register (SAR) architecture. This device is notable for its industry-leading low power consumption and compact size, making it ideal for space-constrained, battery-powered applications. The ADS7040 supports a wide analog input voltage range from 1.65 V to 3.6 V and operates over a temperature range of –40°C to 125°C. It features a SPI-compatible serial interface and is available in miniature packages such as the X2QFN-8 and VSSOP-8, which are smaller than a standard 0805 SMD component.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| AVDD (Analog Supply Voltage) | 1.65 | 3.6 | V | |
| DVDD (Digital Supply Voltage) | 1.65 | 3.6 | V | |
| Operating Temperature Range | –40 | 125 | °C | |
| Resolution | 8 | Bits | ||
| Sampling Rate | 1 | MSPS | ||
| Integral Nonlinearity (INL) | –0.5 | 0.5 | LSB | |
| Differential Nonlinearity (DNL) | –0.4 | 0.4 | LSB | |
| Signal-to-Noise Ratio (SNR) | 48.5 | 49 | dB | |
| Total Harmonic Distortion (THD) | –68.69 | dB | ||
| Power Consumption at 1 MSPS | 171 | 555 | µW |
Key Features
- Ultra-low power consumption: 171 µW at 1 MSPS with 1.8-V AVDD and less than 1 µW at 1 kSPS with 3-V AVDD.
- Ultra-small size: Available in X2QFN-8 and VSSOP-8 packages, smaller than a standard 0805 SMD component.
- Wide operating range: AVDD from 1.65 V to 3.6 V and DVDD from 1.65 V to 3.6 V.
- High performance: 8-bit resolution with no missing codes, ±0.5-LSB INL, and ±0.4-LSB DNL.
- SPI-compatible serial interface with a maximum SCLK frequency of 12 MHz.
- Integrated offset calibration and unipolar input range from 0 V to AVDD.
- JESD8-7A compliant digital I/O.
Applications
- Low-power data acquisition systems.
- Battery-powered handheld equipment.
- Level sensors and ultrasonic flow meters.
- Motor control systems.
- Wearable fitness and portable medical equipment.
- Hard drives and glucose meters.
Q & A
- What is the resolution of the ADS7040 ADC?
The ADS7040 has an 8-bit resolution.
- What is the maximum sampling rate of the ADS7040?
The maximum sampling rate is 1 MSPS.
- What is the power consumption of the ADS7040 at 1 MSPS with 1.8-V AVDD?
The power consumption is 171 µW.
- What are the package options for the ADS7040?
The device is available in X2QFN-8 and VSSOP-8 packages.
- What is the operating temperature range of the ADS7040?
The operating temperature range is from –40°C to 125°C.
- Is the ADS7040 compatible with SPI interfaces?
- What is the maximum SCLK frequency for the ADS7040?
The maximum SCLK frequency is 12 MHz.
- Does the ADS7040 support unipolar input ranges?
- Is the ADS7040 compliant with any specific digital I/O standards?
- What are some typical applications of the ADS7040?
Typical applications include low-power data acquisition, battery-powered handheld equipment, level sensors, and wearable fitness devices.
