Overview
The ADS8505IBDB, 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 ADS8505IBDB features a full parallel data output interface, making it suitable for various applications requiring high-speed and accurate analog-to-digital conversion. The device includes internal precision resistors that provide a standard ±10-V input range and an internal 2.5-V reference, although it can also use an external reference if needed.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Resolution | Bits | 16 | 16 | 16 |
| Sampling Rate | ksps | 250 | 250 | 250 |
| Analog Input Voltage Range | V | ±10 | ±10 | ±10 |
| Analog Input Impedance | kΩ | 11.5 | 11.5 | 11.5 |
| Integral Nonlinearity (INL) | LSB | -1.5 | -1.5 | 1.5 |
| Differential Nonlinearity (DNL) | LSB | -1 | -1 | 1 |
| Full-Scale Error (FSR) | % | -0.25 | -0.25 | 0.25 |
| Bipolar Zero Error | mV | -2 | -2 | 2 |
| Supply Voltage | V | 4.75 | 5 | 5.25 |
| Power Dissipation | mW | 70 | 70 | 100 |
| Operating Temperature Range | °C | -40 | -40 | 85 |
Key Features
- 16-bit SAR ADC with a sampling rate of 250 kSPS
- Standard ±10-V input range with internal precision resistors
- Internal 2.5-V reference, with the option to use an external reference
- Single +5-V supply operation with low power dissipation (typically 70 mW at 250 kSPS)
- Full parallel data output interface in binary 2's complement format
- High accuracy: ±1.5 LSB max INL, ±1 LSB max DNL, and no missing codes
- Low bipolar zero error and drift: ±2 mV max bipolar zero error with ±0.4 PPM/°C drift
- Pin-compatible with ADS7805 (low speed) and 12-bit ADS8504/7804
- 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 ADS8505IBDB ADC?
The ADS8505IBDB has a resolution of 16 bits.
- What is the sampling rate of the ADS8505IBDB?
The sampling rate is 250 kSPS.
- What is the input voltage range of the ADS8505IBDB?
The input voltage range is ±10 V.
- What type of supply voltage does the ADS8505IBDB require?
The device operates on a single +5-V supply.
- What is the typical power dissipation of the ADS8505IBDB at 250 kSPS?
The typical power dissipation is 70 mW.
- What is the operating temperature range of the ADS8505IBDB?
The operating temperature range is –40°C to 85°C.
- Does the ADS8505IBDB have an internal reference?
Yes, it has an internal 2.5-V reference, but it can also use an external reference.
- What is the data output format of the ADS8505IBDB?
The data output is in binary 2's complement format with a full parallel interface.
- What are the key accuracy specifications of the ADS8505IBDB?
The device has ±1.5 LSB max INL, ±1 LSB max DNL, and no missing codes.
- Is the ADS8505IBDB pin-compatible with other models?
Yes, it is pin-compatible with ADS7805 (low speed) and 12-bit ADS8504/7804.
