Overview
The ADS8505IBDBR, produced by Texas Instruments, is a 16-bit successive approximation register (SAR) analog-to-digital converter (ADC). This device is designed for high-precision data acquisition and is available in 28-pin SSOP and SOIC packages. It operates over an industrial temperature range of –40°C to 85°C and is powered by a single 5-V supply, with a typical power dissipation of 70 mW at a 250-kHz sampling rate.
The ADS8505 features a capacitor-based SAR architecture, including a sample-and-hold circuit, internal or external reference options, and a full parallel data output interface. It is well-suited for applications requiring high accuracy and reliability, such as industrial process control, medical equipment, and digital signal processing.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Resolution | Bits | 16 | 16 | 16 |
| Analog Input Voltage Range | V | ±10 | ±10 | ±10 |
| Analog Input Impedance | kΩ | 11.5 | 11.5 | 11.5 |
| Sampling Rate | kHz | 250 | 250 | 250 |
| Integral Linearity Error (INL) | LSB | -1.5 | -1.5 | 1.5 |
| Differential Linearity Error (DNL) | LSB | -1 | -1 | 1 |
| Full-Scale Error (FSE) | %FSR | -0.5 | -0.25 | 0.5 |
| Spurious Free Dynamic Range (SFDR) | dB | 92 | 98 | 105 |
| Total Harmonic Distortion (THD) | dB | -98 | -92 | -103 |
| Signal-to-Noise Ratio (SNR) | dB | 83 | 88 | 88 |
| Power Dissipation | mW | 70 | 100 | 100 |
| Operating Temperature Range | °C | -40 | - | 85 |
Key Features
- High Resolution and Accuracy: 16-bit resolution with ±1.5 LSB max INL and ±1 LSB max DNL, ensuring high precision in data conversion.
- Single Supply Operation: Operates from a single 5-V supply, simplifying system design.
- Internal or External Reference: Can use either the internal 2.5-V reference or an external reference, providing flexibility in system design.
- Full Parallel Data Output: Outputs data in full parallel 16-bit word or two 8-bit bytes, facilitating easy integration with microprocessors.
- Low Power Consumption: Typical power dissipation of 70 mW at 250-kHz sampling rate, making it suitable for power-sensitive applications.
- Industrial Temperature Range: Fully specified for operation over –40°C to 85°C, ensuring reliability in harsh environments.
- High SFDR and SNR: Offers a spurious free dynamic range of up to 105 dB and a signal-to-noise ratio of up to 88 dB, ensuring high signal integrity.
Applications
- Industrial Process Control: Suitable for monitoring and controlling industrial processes due to its high accuracy and reliability.
- Data Acquisition Systems: Ideal for data acquisition systems requiring high-resolution and high-speed conversions.
- Medical Equipment: Used in medical devices where precise and reliable data conversion is critical.
- Digital Signal Processing: Applicable in various digital signal processing applications requiring high signal integrity.
- Instrumentation: Suitable for use in instrumentation equipment such as multimeters, oscilloscopes, and other measurement devices.
Q & A
- What is the resolution of the ADS8505IBDBR?
The ADS8505IBDBR has a 16-bit resolution.
- What is the sampling rate of the ADS8505IBDBR?
The sampling rate is 250 kHz.
- What is the input voltage range of the ADS8505IBDBR?
The input voltage range is ±10 V.
- Can the ADS8505IBDBR use an external reference?
Yes, it can use either an internal 2.5-V reference or an external reference.
- What is the typical power dissipation of the ADS8505IBDBR at 250 kHz sampling rate?
The typical power dissipation is 70 mW.
- What is the operating temperature range of the ADS8505IBDBR?
The operating temperature range is –40°C to 85°C.
- What is the SFDR of the ADS8505IBDBR?
The spurious free dynamic range (SFDR) is up to 105 dB.
- How does the ADS8505IBDBR output data?
The data is output in full parallel 16-bit word or two 8-bit bytes.
- Is the ADS8505IBDBR suitable for industrial applications?
Yes, it is fully specified for operation over the industrial temperature range and is suitable for industrial process control and other industrial applications.
- What are the package options for the ADS8505IBDBR?
The device is available in 28-pin SSOP and SOIC packages.
