ADS127L11 - 24-Bit 400-kSPS Delta-Sigma ADC | Texas Instruments
MPN: ADS127L11 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $9.8 | $980.00 |
| 500 | $8.9 | $4,450.00 |
| 1,000 | $8.1 | $8,100.00 |
Drop-in alternatives for ADS127L11 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ADS127L21
β Drop-Inπ Reference alternative (not in catalog)
ADS127L14
β‘ Same Packageπ Reference alternative (not in catalog)
ADS127L18
β‘ Same Packageπ Reference alternative (not in catalog)
ADS127L11IRUKR
β Drop-Inπ Reference alternative (not in catalog)
ADS127L11IPWR
β Drop-Inπ Reference alternative (not in catalog)
ADS127L11 Maximum Ratings & Electrical Characteristics
| Resolution | 24 bit |
| Number of Channels | 1 |
| Sampling Rate (Max) | 400 kSPS (wideband), 1067 kSPS (low-latency) |
| Architecture | Delta-Sigma |
| Input Type | Differential |
| Interface | SPI, Frame-Sync |
| Power Consumption | 18.6 mW (high-speed mode) |
| Supply Voltage (Analog) | 3.3 V or 5 V |
| Supply Voltage (Digital I/O) | 1.8 V to 3.6 V |
| Package | 20-TSSOP (IPWR), 20-VQFN (IRUKR) |
| Operating Temperature Range | -40C to +125C |
| Input Buffer | Yes |
| Reference Buffer | Yes |
| Digital Filter | Wideband and Low-Latency |
| RoHS Status | Compliant |
ADS127L11 Pin Configuration
| Pin 1 | AVDD β Analog power supply |
| Pin 2 | AINP β Positive analog input |
| Pin 3 | AINN β Negative analog input |
| Pin 4 | REFN β Negative reference input |
| Pin 5 | REFP β Positive reference input |
| Pin 6 | AVSS β Analog ground |
| Pin 7 | DVDD β Digital power supply |
| Pin 8 | DGND β Digital ground |
| Pin 9 | SCLK β Serial clock input |
| Pin 10 | DOUT β Serial data output |
| Pin 11 | DIN β Serial data input |
| Pin 12 | CS β Chip select (active low) |
| Pin 13 | SYNC β Synchronization input |
| Pin 14 | MODE β Interface mode select |
| Pin 15 | RESET β Reset input (active low) |
| Pin 16 | PWDN β Power-down input |
| Pin 17 | CLK β Master clock input |
| Pin 18 | NC β No connect |
| Pin 19 | NC β No connect |
| Pin 20 | AVDD β Analog power supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADS127L11 is suitable for 6 applications: Vibration Monitoring, Medical Instrumentation, Industrial Process Control, Test and Measurement, Audio Test Equipment, Energy Monitoring.
Vibration Monitoring
The ADS127L11's high data rate (up to 400 kSPS) and 24-bit resolution enable precise vibration analysis in industrial machinery. Its low power consumption (18.6 mW) allows deployment in battery-powered wireless sensors. The integrated input buffer simplifies interfacing with piezoelectric accelerometers, reducing external components and improving signal integrity.
Recommended
Medical Instrumentation
For EEG and ECG applications, the ADS127L11 provides high resolution and low noise, essential for capturing small biopotential signals. The low-latency filter enables real-time monitoring, and the integrated reference buffer allows precise reference voltage. Its low power is ideal for portable medical devices, and the SPI interface simplifies data transfer to microcontrollers.
Recommended
Industrial Process Control
The ADS127L11's wide bandwidth and high accuracy make it suitable for industrial process control loops. It can digitize sensor signals from temperature, pressure, and flow transmitters with high precision. The device's low power and small package (20-TSSOP) allow integration into compact control modules, and the frame-sync interface supports synchronized multi-channel systems.
Recommended
Test and Measurement
In data acquisition systems, the ADS127L11 offers high resolution and fast sampling, enabling accurate capture of transient signals. The low-latency filter is beneficial for triggered measurements, and the input buffer reduces loading on the signal source. Its wide supply range and SPI interface make it versatile for benchtop instruments and modular DAQ systems.
Recommended
Audio Test Equipment
The ADS127L11's high SNR and low distortion are critical for audio analysis. It can digitize audio signals with high fidelity, and its low power consumption is beneficial for portable audio testers. The wideband filter supports full audio bandwidth, and the SPI interface allows easy integration with DSPs for real-time analysis.
Recommended
Energy Monitoring
The ADS127L11 can be used in energy metering and power quality analysis. Its high resolution and sampling rate enable accurate measurement of voltage and current waveforms. The integrated buffers simplify connection to current transformers and voltage dividers, and the low power is suitable for smart meters. The SPI interface allows communication with metering SoCs.
Recommended
Recommended Products Summary
Engineering reference data for ADS127L11 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS127L21 | ADS127L14 | ADS127L18 |
|---|---|---|---|---|
| Package | 20-TSSOP (IPWR) | 20-TSSOP | 20-TSSOP | 20-TSSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Channels | 1 | 2 | 4 | 8 |
| Max Data Rate (Wideband) | 400 kSPS | 400 kSPS | 400 kSPS | 400 kSPS |
| Max Data Rate (Low-Latency) | 1067 kSPS | 1067 kSPS | 1067 kSPS | 1067 kSPS |
| Power Consumption | 18.6 mW | 18.6 mW | 18.6 mW | 18.6 mW |
| Input Buffer | Yes | Yes | Yes | Yes |
| Reference Buffer | Yes | Yes | Yes | Yes |
Key Differentiators
- Higher maximum data rate than many competing 24-bit delta-sigma ADCs (vs ADS127L21)
- Integrated input and reference buffers reduce external component count (vs ADS127L14)
- Low power consumption of 18.6 mW (vs ADS127L18)
Design Notes
Decouple AVDD and DVDD with 10uF and 0.1uF capacitors placed close to the pins. Use separate analog and digital grounds to minimize noise coupling. The device operates from 3.3V or 5V analog supply; ensure the digital I/O supply (DVDD) is within 1.8V to 3.6V to match the host interface.
For optimal performance, use a low-noise reference and bypass the REFP and REFN pins with 10uF and 0.1uF capacitors. The input buffer requires a bias voltage; connect a 0.1uF capacitor from AINP and AINN to ground. Keep analog input traces short and shielded from digital signals.
Avoid exceeding the absolute maximum ratings on the analog inputs. Ensure the master clock (CLK) is stable and within the specified frequency range. The SYNC pin can be used to synchronize multiple ADCs; tie it high if not used. Always reset the device after power-up to ensure proper initialization.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified.
