Overview
The ADS8505IBDWR, 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 built-in sample-and-hold circuit, internal or external reference options, and a full parallel 16-bit data output in binary 2's complement format.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Resolution | Bits | 16 | 16 | 16 |
| Analog Input Voltage Range | V | ±10 | ±10 | ±10 |
| Sampling Rate | kHz | 250 | 250 | 250 |
| Integral Linearity Error (INL) | LSB | -1.5 | - | 1.5 |
| Differential Linearity Error (DNL) | LSB | -1 | - | 1 |
| Spurious Free Dynamic Range (SFDR) | dB | 92 | 98 | 105 |
| Total Harmonic Distortion (THD) | dB | -98 | -92 | -103.9 |
| Signal-to-Noise Ratio (SNR) | dB | 83 | 88 | 88 |
| Power Dissipation | mW | 70 | - | 100 |
| Operating Temperature Range | °C | -40 | - | 85 |
Key Features
- 16-bit SAR ADC with a sampling rate of 250 kHz.
- Standard ±10-V input range with precision resistors.
- Single +5-V supply operation with low power dissipation (typically 70 mW at 250 kSPS).
- Internal or external reference options with an internal reference voltage of 2.5 V.
- Full parallel 16-bit data output in binary 2's complement format.
- High accuracy with ±1.5 LSB max INL and ±1 LSB max DNL.
- Low bipolar zero error and drift (±2 mV max, ±0.4 ppm/°C).
- Pin-compatible with ADS7805 (low speed) and ADS8504/7804 (12-bit).
- Available in 28-pin SSOP and SOIC packages.
Applications
- Industrial Process Control
- Data Acquisition Systems
- Digital Signal Processing
- Medical Equipment
- Instrumentation
Q & A
- What is the resolution of the ADS8505IBDWR?
The ADS8505IBDWR has a resolution of 16 bits.
- What is the sampling rate of the ADS8505IBDWR?
The sampling rate is 250 kHz.
- What is the input voltage range of the ADS8505IBDWR?
The input voltage range is ±10 V.
- Can the ADS8505IBDWR use an external reference?
- What is the power dissipation of the ADS8505IBDWR at 250 kSPS?
The typical power dissipation is 70 mW at 250 kSPS.
- What are the package options for the ADS8505IBDWR?
The device is available in 28-pin SSOP and SOIC packages.
- What is the operating temperature range of the ADS8505IBDWR?
The operating temperature range is –40°C to 85°C.
- What is the SFDR of the ADS8505IBDWR at a 20 kHz input frequency?
The SFDR is typically 105 dB at a 20 kHz input frequency.
- How does the ADC reset function work on the ADS8505IBDWR?
The ADC reset function can be initiated by bringing R/C low for at least 40 ns while BUSY is low, which terminates the current conversion cycle.
- What is the format of the digital output of the ADS8505IBDWR?
The digital output is in binary 2's complement format.
