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Texas Instruments ADS1278IPAPR
- Part No.:
- ADS1278IPAPR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-PowerTQFP
- Datasheet:
-
ADS1278IPAPR.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 64HTQFP
- Quantity:
- Payment:
- Shipping:
Inventory:534
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Product details
Overview
ADS1278IPAPR from Texas Instruments is an octal, simultaneous-sampling, 24-bit delta-sigma analog-to-digital converter (ADC) with up to 144kSPS data rate, 111dB SNR in High-Resolution mode, ±0.0012% FSR INL, and 0.8μV/°C offset drift. It operates across –40°C to +105°C and supports vibration analysis, multi-channel data acquisition, acoustics, and pressure sensing systems requiring precise synchronized sampling of eight analog inputs.
For engineers reviewing the ADS1278IPAPR datasheet, ADS1278IPAPR pinout, ADS1278IPAPR application, or ADS1278IPAPR equivalent, this page delivers verified electrical specifications, HTQFP-64 package layout, SPI/frame-sync interface behavior, operating mode trade-offs (speed vs. resolution vs. power), and validated alternative parts for industrial signal conditioning designs.
Technical Context
The ADS1278IPAPR integrates a high-order chopper-stabilized modulator and four independent digital filters-enabling simultaneous sampling of eight channels with <78/fDATA settling latency and linear-phase response. Its modulator output bypass option allows direct access to raw bitstream for custom filtering.
Control is fully pin-driven: MODE[1:0] selects High-Speed (144kSPS), High-Resolution (52kSPS, 111dB SNR), Low-Power (52kSPS, 31mW/ch), or Low-Speed (10kSPS, 7mW/ch); FORMAT[2:0] configures SPI vs. frame-sync protocol and TDM/discrete output format; CLKDIV sets master clock division ratios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit no-missing-codes-guarantees monotonicity and full dynamic range utilization in precision measurement. |
| Data Rate | Up to 144kSPS (High-Speed mode)-supports real-time modal analysis of mechanical structures up to ~70kHz bandwidth. |
| SNR | 111dB (High-Resolution mode, 52kSPS)-enables 18.5 effective bits for low-noise sensor interfaces like strain gauges. |
| Offset Drift | 0.8μV/°C-minimizes calibration burden in unattended industrial monitoring over wide temperature ranges. |
| Gain Drift | 1.3ppm/°C-ensures stable full-scale accuracy without frequent gain recalibration in field-deployed DAQ systems. |
| Input Impedance | 14kΩ (High-Speed/High-Resolution modes)-compatible with standard instrumentation amplifiers and passive RC anti-aliasing networks. |
| Reference Input Range | 0.5V to 3.1V differential-supports flexible external reference selection including 2.5V and 3.0V precision references. |
Pinout & Package
ADS1278IPAPR is housed in a 64-pin HTQFP PowerPAD™ package (PAP) with exposed thermal pad. Pin assignments are defined per TI SBAS367F Rev F, supporting octal differential analog input pairs, dual power domains (AVDD/DVDD/IOVDD), and configurable digital interface signals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP[8:1], AINN[8:1] | Differential analog inputs | Eight fully independent channel pairs; each pair accepts ±VREF full-scale differential input with common-mode at AVDD/2. |
| VREFP / VREFN | Reference voltage inputs | Differential reference input (0.5V–3.1V range); determines ADC full-scale range and directly impacts gain accuracy. |
| DRDY/FSYNC | Multi-function digital I/O | In SPI mode: open-drain data-ready flag; in frame-sync mode: frame clock input-enables deterministic timing synchronization across multiple devices. |
| DOUT[8:1] | Parallel digital outputs | Eight dedicated serial data outputs (TDM or discrete format); eliminates time-division multiplexing bottlenecks in high-channel-count systems. |
| PWDN[8:1] | Per-channel power-down control | Independent enable/disable of each ADC channel-reduces system power by >90% when only subset of channels is active. |
| MODE[1:0], FORMAT[2:0] | Mode configuration inputs | No-register operation: all functional modes and interface protocols selected directly via hardwired logic levels-simplifies firmware and improves boot reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous 8-channel sampling | Eliminates inter-channel skew (<1ps typical sampling match error), critical for phase-coherent vibration and acoustic beamforming. |
| Selectably optimized operating modes | Four pin-configurable modes trade off speed (144kSPS), resolution (111dB SNR), and power (7mW/ch), enabling one hardware design across multiple performance tiers. |
| Linear-phase digital filter | Preserves time-domain waveform integrity-essential for transient capture in impact testing and fault detection algorithms. |
| Modulator output bypass | Direct access to raw bitstream enables implementation of custom decimation filters or real-time spectral analysis without onboard filter latency. |
| Low sampling aperture error | Minimizes time-jitter-induced noise floor degradation-maintains specified SNR even with imperfect clock edge quality. |
Applications
| Vibration/Modal Analysis | Multi-Channel Data Acquisition |
|---|---|
|
Use Scenario: Real-time structural health monitoring of rotating machinery using eight accelerometers mounted on gearbox housing. IC Role / Device Role / Timing Role: Simultaneous sampling ADC capturing phase-aligned time-series data from all eight sensors at 52kSPS for FFT-based resonance tracking. Use Value: Sub-picosecond inter-channel sampling match ensures accurate phase difference calculation between vibration modes across spatially distributed sensors. |
Use Scenario: Industrial process control system acquiring pressure, temperature, flow, and strain signals from eight transducers in a single PLC rack. IC Role / Device Role / Timing Role: Centralized octal ADC providing synchronized, high-resolution digitization with programmable gain and offset compensation per channel. Use Value: 0.8μV/°C offset drift and 1.3ppm/°C gain drift eliminate need for periodic recalibration in harsh factory environments. |
| Acoustics/Dynamic Strain Gauges | Pressure Sensors |
|
Use Scenario: Underwater acoustic array with eight hydrophones measuring transient cavitation events in marine propulsion systems. IC Role / Device Role / Timing Role: High-speed (144kSPS) delta-sigma ADC capturing broadband acoustic waveforms with 70kHz usable bandwidth and 106dB SNR. Use Value: Linear-phase filter preserves sharp transient edges in impulsive signals, enabling precise time-of-arrival estimation for beamforming. |
Use Scenario: Aerospace-grade engine manifold pressure monitoring using eight piezoresistive bridge sensors under extreme thermal cycling. IC Role / Device Role / Timing Role: Precision octal ADC with integrated reference buffer and matched input impedance (14kΩ) driving ratiometric bridge measurements. Use Value: Differential input architecture rejects common-mode noise from high-voltage ignition systems while maintaining 24-bit resolution over –40°C to +105°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal, high-precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1274IPAPR | Quad-channel version in identical HTQFP-64 package; shares same pinout, timing, and registerless control-but only four DOUT pins and four PWDN inputs. | Used where channel count is fixed at four and board layout must support future octal upgrade via component swap only. | Select ADS1274IPAPR when system requires exactly four synchronized channels and PCB footprint compatibility with ADS1278IPAPR is mandatory. |
| AD7768-1BCPZ | Single-channel 24-bit ΣΔ ADC with 256kSPS max, 112dB SNR, and integrated PGA; uses SPI-only interface with register-based configuration-not pin-controlled. | Suitable for modular DAQ where per-channel flexibility (gain, filter, ODR) outweighs need for hardware-synchronized multi-channel capture. | Choose AD7768-1BCPZ when channel isolation, programmable gain, or higher single-channel throughput is prioritized over simultaneous octal sampling. |
Compared with ADS1274IPAPR, ADS1278IPAPR doubles channel count without changing package or interface logic-enabling scalable sensor density; versus AD7768-1BCPZ, it trades configurability and per-channel optimization for deterministic hardware-level synchronization across all eight channels.
Availability
ADS1278IPAPR is available at Aetrix Electronics and suitable for vibration analysis, multi-channel data acquisition, and acoustics systems requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.
Supply support for ADS1278IPAPR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision data conversion and industrial signal chain solutions.
The ADS127x family was designed specifically for high-fidelity, multi-channel industrial measurement-bridging the gap between audio-grade bandwidth and industrial-grade drift performance in a single device.
FAQ
What is the maximum sample rate achievable with the ADS1278IPAPR?
The ADS1278IPAPR achieves up to 144kSPS in High-Speed mode when configured with fCLK = 37MHz and MODE[1:0] = 11. This rate is sustained across all eight channels simultaneously, delivering a usable signal bandwidth of ~70kHz while maintaining 106dB SNR-verified per SBAS367F Electrical Characteristics table.
Does the ADS1278IPAPR require external configuration registers to operate?
No. The ADS1278IPAPR uses exclusively pin-driven configuration: MODE[1:0], FORMAT[2:0], and CLKDIV determine operating mode, interface protocol, and clock division without any SPI writes or internal register access. This eliminates firmware dependencies and ensures deterministic startup behavior-critical for safety-critical industrial DAQ systems using ADS1278IPAPR.
How does the ADS1278IPAPR handle channel synchronization across all eight inputs?
The ADS1278IPAPR performs true simultaneous sampling using a shared modulator clock and unified digital filter architecture. All eight channels share identical conversion timing, with measured inter-channel sampling match error ≤1ps (typical), ensuring phase coherence for applications like acoustic beamforming and structural modal analysis where ADS1278IPAPR is deployed.
What power supply voltages does the ADS1278IPAPR require?
The ADS1278IPAPR requires three independent supplies: AVDD = 4.75V–5.25V (analog core), DVDD = 1.65V–2.2V (digital core, dependent on fCLK), and IOVDD = 1.65V–3.6V (I/O interface). These are specified in the Absolute Maximum Ratings and Electrical Characteristics sections of the ADS1278IPAPR datasheet SBAS367F.
Can the ADS1278IPAPR interface directly with an FPGA using SPI protocol?
Yes. The ADS1278IPAPR supports standard SPI communication with configurable SCLK timing (tSCLK ≥ 1×tCLK), MSB-first 24-bit frame format, and DRDY as data-ready indicator. Its DOUT[8:1] outputs allow parallel readout, and DIN supports daisy-chaining-making ADS1278IPAPR well-suited for FPGA-based high-throughput data capture systems.
ADS1278IPAPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-PowerTQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 144k
- Number of Inputs:
- 8
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 1.65V ~ 1.95V
- Features:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 64-HTQFP (10x10)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1278IPAPR FAQ
1.How can I place an order for ADS1278IPAPR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1278IPAPR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADS1278IPAPR reliable?
The price and inventory of ADS1278IPAPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1278IPAPR is usually 5 days.
3.What payment methods are accepted for ADS1278IPAPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1278IPAPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1278IPAPR?
ADS1278IPAPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1278IPAPR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADS1278IPAPR?
For technical support, including ADS1278IPAPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1278IPAPR requirements.
6.How does Aetrix verify that ADS1278IPAPR is sourced from the original manufacturer or authorized distributors?
All ADS1278IPAPR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS1278IPAPR meets industry standards.
7.What is the process for return or replacement of ADS1278IPAPR?
All ADS1278IPAPR units undergo pre-shipment inspection (PSI). If there is an issue with ADS1278IPAPR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADS1278IPAPR part is unused and in its original packaging.
Return procedure for ADS1278IPAPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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