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Part Number: ADS1258
Description: The ADS1258 is a 16-channel (multiplexed), low-noise, 24-bit, delta-sigma (DS) anal...
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ADS1258
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DataSheet
General Description
ADS1258 General Description
The ADS1258 is a 16-channel (multiplexed), low-noise, 24-bit, delta-sigma (DS) analog-to-digital converter (ADC) that provides single-cycle settleddata at channel scan rates from 1.8k to 23.7k samples per second (SPS). A flexible input multiplexer accepts combinations of eight differential or 16 single-ended inputs with a full-scale differential range of 5V or true bipolar range of ±2.5V when operating with a 5V reference. The fourth-order delta-sigma modulator is followed by a fifth-order sinc digital filter optimized for low-noise performance.
The differential output of the multiplexer is accessible to allow signal conditioning prior to the input of the ADC. Internal system monitor registers provide supply voltage, temperature, reference voltage, gain, and offset data.
An onboard PLL generates the system clock from a 32.768kHz crystal, or can be overridden by an external clock source. A buffered system clock output(15.7MHz) is provided to drive a microcontroller or additional converters.
ADS1258 Maximum Ratings
| ADS1271 | UNIT | |
| AVDD to AGND | −0.3 to +6.0 | V |
| DVDD to DGND | −0.3 to +3.6 | V |
| AGND to DGND | −0.3 to +0.3 | V |
| Input Current | 100, momentary | mA |
| Input Current | 10, continuous | mA |
| Analog input voltage to GND | AVSS 0.3 to AVDD + 0.3 | V |
| Digital input voltage to GND | 0.3 to DVDD + 0.3 | V |
| Maximum Junction Temperature | +150 | °C |
| Operating Temperature Range | -40 to +85 | °C |
| Storage Temperature Range | -65 to +150 | °C |
| Lead Temperature (soldering, 10s) | +300 | °C |
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
ADS1258 Features
` 24 Bits, No Missing Codes
` Fixed-Channel or Automatic Channel Scan
` Fixed-Channel Data Rate: 125kSPS
` Auto-Scan Data Rate: 23.7kSPS
` Single-Conversion Settled Data
` 16 Single-Ended or 8 Differential Inputs
` Unipolar (+5V) or Bipolar (±2.5V) Operation
` Low Noise: 2.8VRMS at 1.8kSPS
` 0.0003% Integral Nonlinearity
` DC Stability (typical):0.02V/°C Offset Drift, 0.4ppm/°C Gain Drift
` Open-Sensor Detection
` Conversion Control (Pin and Commands)
` Multiplexer Output for External Signal Conditioning
` On-Chip Temperature, Reference, Offset,
` 32.768kHz Crystal Oscillator or External Clock
` Fixed-Channel or Automatic Channel Scan
` Fixed-Channel Data Rate: 125kSPS
` Auto-Scan Data Rate: 23.7kSPS
` Single-Conversion Settled Data
` 16 Single-Ended or 8 Differential Inputs
` Unipolar (+5V) or Bipolar (±2.5V) Operation
` Low Noise: 2.8VRMS at 1.8kSPS
` 0.0003% Integral Nonlinearity
` DC Stability (typical):0.02V/°C Offset Drift, 0.4ppm/°C Gain Drift
` Open-Sensor Detection
` Conversion Control (Pin and Commands)
` Multiplexer Output for External Signal Conditioning
` On-Chip Temperature, Reference, Offset,
` 32.768kHz Crystal Oscillator or External Clock
ADS1258 Typical Application
· Medical, Avionics, and Process Control
· Machine and System Monitoring
· Fast Scan Multi-Channel Instrumentation
· Industrial Process Controls 5.25V.
· Test and Measurement Systems
· Machine and System Monitoring
· Fast Scan Multi-Channel Instrumentation
· Industrial Process Controls 5.25V.
· Test and Measurement Systems
ADS1258 Connection Diagram
ADS1258
PDF/DataSheet Download
- Datasheet: ADS1258
- File Size: 809860 KB
- Manufacturer: TI [Texas Instruments]
- Click here to Download
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