Overview
The ADS8505IDWG4, produced by Texas Instruments, is a 16-bit successive approximation register (SAR) analog-to-digital converter (ADC) designed for high-performance applications. This CMOS-based ADC operates at a sampling rate of 250 kHz and is fully specified for the industrial temperature range of –40°C to 85°C. It features a standard ±10-V input range, making it suitable for a variety of industrial and medical applications. The device includes a complete 16-bit ADC with sample-and-hold, reference, clock, and interface logic for microprocessor use, along with three-state output drivers.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Resolution | 16 | 16 | 16 | Bits |
| Analog Input Voltage Range | ±10 | ±10 | ±10 | V |
| Analog Input Impedance | 11.5 | 11.5 | 11.5 | kΩ |
| Throughput Rate | 250 | 250 | 250 | kHz |
| Integral Linearity Error (INL) | -1.5 | -1.5 | 1.5 | LSB |
| Differential Linearity Error (DNL) | -1 | -1 | 1 | LSB |
| Full-Scale Error (FSE) with Internal Reference | -0.5 | -0.5 | 0.5 | %FSR |
| Power Dissipation at 250 KSPS | 70 | 70 | 100 | mW |
| Operating Temperature Range | -40 | -40 | 85 | °C |
| Package Type | 28-pin SOIC |
Key Features
- 16-bit SAR ADC with a sampling rate of 250 kHz
- Standard ±10-V input range
- Single 5-V supply operation with power dissipation under 100 mW
- Internal or external reference options
- Full parallel data output in binary 2's complement format
- Three-state output drivers
- Pin-compatible with ADS7805 (low speed) and 12-bit ADS8504/7804
- 105 dB SFDR at 250 kHz sample rate
- ±1.5 LSB max INL and ±1 LSB max DNL, with no missing codes
- ±2 mV max bipolar zero error with ±0.4 ppm/°C drift
Applications
- Industrial Process Control
- Data Acquisition Systems
- Digital Signal Processing
- Medical Equipment
- Instrumentation
Q & A
- What is the resolution of the ADS8505IDWG4?
The ADS8505IDWG4 has a resolution of 16 bits.
- What is the sampling rate of the ADS8505IDWG4?
The sampling rate is 250 kHz.
- What is the input voltage range of the ADS8505IDWG4?
The input voltage range is ±10 V.
- Can the ADS8505IDWG4 operate with an external reference?
- What is the power dissipation of the ADS8505IDWG4 at 250 KSPS?
The power dissipation is typically 70 mW.
- What is the operating temperature range of the ADS8505IDWG4?
The operating temperature range is –40°C to 85°C.
- What type of output does the ADS8505IDWG4 provide?
The output is in full parallel data format in binary 2's complement.
- Is the ADS8505IDWG4 pin-compatible with other models?
- What is the typical full-scale error of the ADS8505IDWG4 with an internal reference?
The typical full-scale error is ±0.5% FSR.
- What is the bipolar zero error of the ADS8505IDWG4?
The bipolar zero error is ±2 mV max.
