Overview
The ADS7946SRTET, produced by Texas Instruments, is a 14-bit, 2 MSPS (Mega Samples Per Second) analog-to-digital converter (ADC) designed for high-performance data acquisition applications. This device features both differential and single-ended input capabilities, making it versatile for various signal processing needs. The ADS7946 is part of the ADS7945/6 family and is pin-compatible with the 8/10/12-bit ADS7947/8/9 devices, ensuring ease of integration and design flexibility. It operates over an extended temperature range of –40°C to +125°C, making it suitable for a wide range of environments.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Units |
|---|---|---|---|---|
| Resolution | - | 14 Bits | - | - |
| Sample Rate | - | 2 MSPS | - | - |
| Integral Linearity (INL) | -2.5 | ±1.25 | 2.5 | LSB |
| Differential Linearity (DNL) | -1 | ±0.8 | 2.0 | LSB |
| Offset Error | -4 | ±1.5 | 4 | LSB |
| Gain Error | -4 | ±1.5 | 4 | LSB |
| Signal-to-Noise Ratio (SNR) | - | 84 dB | - | - |
| Analog Supply Voltage (AVDD) | 2.7 V | - | 5.25 V | V |
| Digital Supply Voltage (DVDD) | 1.65 V | - | AVDD | V |
| Power Consumption at 2 MSPS | - | 11.6 mW | - | mW |
| Power Consumption at 500 kSPS | - | 7.2 mW | - | mW |
| Power Consumption at 100 kSPS | - | 1.4 mW | - | mW |
| Package Type | - | 16-WQFN Exposed Pad | - | - |
| Operating Temperature Range | -40°C | - | +125°C | °C |
Key Features
- High Performance: The ADS7946 offers outstanding DC precision and excellent dynamic performance, with a signal-to-noise ratio (SNR) of 84 dB and no missing codes.
- Low Power Consumption: The device operates at low power levels, with consumption as low as 11.6 mW at 2 MSPS, 7.2 mW at 500 kSPS, and 1.4 mW at 100 kSPS. It also features auto power-down at lower speeds.
- Wide Supply Range: The analog supply voltage range is from 2.7 V to 5.25 V, and the digital supply voltage can be as low as 1.65 V up to AVDD.
- Simple Serial Interface (SPI): The device uses a standard 16-clock data frame for easy interfacing with a variety of digital systems.
- Compact Package: The ADS7946 is offered in a tiny 3 mm × 3 mm QFN package, making it suitable for space-constrained applications.
- Dual-Channel Input Multiplexer: The device includes a two-channel input multiplexer and a low-power successive approximation register (SAR) ADC with an inherent sample-and-hold (S/H) input stage).
Applications
The ADS7946SRTET is suitable for a wide variety of data acquisition applications where high performance, low power, and small package size are critical. These applications include:
- Industrial Automation: For precise measurement and control in industrial environments.
- Medical Devices: For high-accuracy data acquisition in medical equipment.
- Aerospace and Defense: For applications requiring robust performance over a wide temperature range.
- Automotive Systems: For reliable and precise data acquisition in automotive electronics.
- Test and Measurement Equipment: For high-performance measurement instruments.
Q & A
- What is the resolution of the ADS7946SRTET?
The ADS7946SRTET has a resolution of 14 bits.
- What is the maximum sample rate of the ADS7946SRTET?
The maximum sample rate is 2 MSPS (Mega Samples Per Second).
- What is the signal-to-noise ratio (SNR) of the ADS7946SRTET?
The SNR is 84 dB.
- What is the power consumption of the ADS7946SRTET at 2 MSPS?
The power consumption is 11.6 mW at 2 MSPS.
- What is the operating temperature range of the ADS7946SRTET?
The operating temperature range is from –40°C to +125°C.
- What type of package does the ADS7946SRTET come in?
The device is offered in a 16-WQFN Exposed Pad package.
- Does the ADS7946SRTET support differential and single-ended inputs?
- Is the ADS7946SRTET pin-compatible with other ADCs?
- What is the analog supply voltage range for the ADS7946SRTET?
- Does the ADS7946SRTET have an auto power-down feature?
