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Texas Instruments ADS1178IPAPT
- Part No.:
- ADS1178IPAPT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-PowerTQFP
- Datasheet:
-
ADS1178IPAPT.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 64HTQFP
- Quantity:
- Payment:
- Shipping:
Inventory:336
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Product details
Overview
ADS1178IPAPT from Texas Instruments is an octal, simultaneous-sampling, 16-bit delta-sigma analog-to-digital converter with 52kSPS high-speed mode and 10.5kSPS low-power mode, ±0.3 LSB INL, 97dB SNR, and 100dB stop-band attenuation - used in precision multi-channel acquisition systems such as 3-phase power monitors and vibration analysis equipment.
For engineers reviewing the ADS1178IPAPT datasheet, ADS1178IPAPT pinout, ADS1178IPAPT application, or ADS1178IPAPT equivalent, this page delivers verified technical context, HTQFP-64 package mapping, real-world timing behavior, channel synchronization capability, and validated alternative options for industrial signal chain design.
Technical Context
The ADS1178IPAPT integrates eight independent 6th-order chopper-stabilized delta-sigma modulators synchronized to a single master clock (up to 27MHz), each feeding a linear-phase FIR digital filter with ±0.005dB passband ripple and 0.453×fDATA –3dB bandwidth. All channels share identical sampling aperture timing, enabling <±0.1° phase matching across full bandwidth.
It supports dual serial interface modes: SPI (with DRDY-driven data ready) and Frame-Sync (with FSYNC frame clock), both configurable via FORMAT[2:0] pins; channel power-down is individually controlled via PWDN[8:1], and operating mode (High-Speed/Low-Power) is selected by MODE pin with corresponding AVDD current of 44–64mA or 9–14mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonic transfer function for closed-loop control and metrology. |
| Data Rate | 52,734 SPS (High-Speed) or 10,547 SPS (Low-Power) - sets maximum real-time sampling throughput per channel. |
| SNR / THD | 97 dB SNR, –105 dB THD - enables high-fidelity spectral analysis of low-amplitude signals up to 25kHz. |
| Offset Drift | 2 µV/°C - ensures stable DC accuracy over industrial temperature range (–40°C to +105°C). |
| Gain Drift | 2 ppm/°C - maintains amplitude consistency across thermal cycling without recalibration. |
| Digital Filter Stop Band | 100 dB attenuation beyond 0.547×fDATA - suppresses out-of-band noise and aliasing without external filtering. |
| Input Impedance | 2.6 kΩ (High-Speed) / 1.3 kΩ (Low-Power) at VREF inputs - defines required reference driver strength. |
Pinout & Package
ADS1178IPAPT is housed in a thermally enhanced HTQFP-64 PowerPAD™ package (10mm × 10mm, 0.5mm pitch) with exposed thermal pad on underside for PCB heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP1–AINP8 / AINN1–AINN8 | Differential analog inputs | Eight fully independent, simultaneously sampled input pairs - each pair measures VIN = (AINP – AINN) against VREF. |
| VREFP / VREFN | Differential reference inputs | Defines full-scale range (±VREF); supports 0.5V–3.1V reference span with dedicated impedance specs per mode. |
| DRDY/FSYNC | Configurable I/O | In SPI mode: open-drain data-ready flag; in Frame-Sync mode: frame clock input - enables deterministic system-level sync. |
| DOUT1–DOUT8 | Channel-specific serial outputs | Eight separate TDM-capable outputs - allows daisy-chaining or parallel readout without multiplexing latency. |
| PWDN1–PWDN8 | Per-channel power-down control | Individual CMOS inputs disable modulator/filter for unused channels - reduces total system power by >50% when partial channel use is needed. |
| MODE | Operating mode select | Static CMOS input: logic 0 = High-Speed (52kSPS, 31mW/ch), logic 1 = Low-Power (10.5kSPS, 7mW/ch). |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous 8-channel sampling | Sub-0.1° inter-channel phase match enables coherent multi-sensor measurements in motor control and power quality analyzers. |
| Linear-phase FIR filter | Constant group delay (38/fDATA) eliminates frequency-dependent phase distortion - critical for time-of-flight and modal analysis. |
| Pin-driven configuration | No internal registers or firmware required - all modes, interfaces, and power states set via hardwired logic pins (FORMAT, MODE, PWDN). |
| SYNC input for global start | Single edge-triggered input synchronizes conversion start across all eight channels - essential for transient capture in protection relays. |
| Drop-in compatibility with ADS1278 | Same HTQFP-64 footprint and pinout - allows field-upgrade path to 24-bit resolution without PCB redesign. |
Applications
| 3-Phase Power Monitoring | Vibration/Modal Analysis |
|---|---|
|
Use Scenario: Real-time measurement of voltage/current waveforms across three AC phases plus neutral, including harmonic content up to 50th order. IC Role / Device Role / Timing Role: Simultaneous 8-channel ADC captures all phase voltages and currents with sub-sample inter-channel alignment for true vector calculations. Use Value: Enables IEEE 1459-compliant power metrics (active/reactive/apparent power, THD, unbalance) without interpolation error. |
Use Scenario: Multi-point acceleration sensing on rotating machinery to detect bearing faults, misalignment, or resonance modes. IC Role / Device Role / Timing Role: Eight synchronized analog inputs digitize geophone or piezoelectric sensor outputs with matched group delay for accurate cross-channel coherence analysis. Use Value: Preserves phase relationships between sensors - enabling FFT-based modal identification and time-domain waveform reconstruction. |
| Coriolis Flow Meters | ECG/Defibrillator Signal Chain |
|
Use Scenario: Precision detection of tube oscillation phase shift induced by mass flow, requiring ultra-low drift and high SNR at low frequencies. IC Role / Device Role / Timing Role: Dual differential inputs (for drive and sense signals) operate in Low-Power mode with 2µV/°C offset drift and 97dB SNR. Use Value: Delivers <0.1% mass flow accuracy over –40°C to +105°C ambient without periodic zero calibration. |
Use Scenario: Acquisition of biopotential signals (ECG leads I–III, V1–V6) with simultaneous respiration and defibrillation pulse monitoring. IC Role / Device Role / Timing Role: Eight-channel simultaneous sampling captures all ECG leads plus auxiliary signals while rejecting common-mode interference via matched input paths. Use Value: Supports 12-lead ECG generation and arrhythmia detection algorithms with deterministic timing and <1µV RMS noise floor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal, simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1278IPAPT | 24-bit resolution, same HTQFP-64 pinout and interface, higher power (65mW/ch), lower max data rate (65kSPS → 32kSPS) | Required for <1ppm measurement precision (e.g., calibration standards, metrology labs) | Select ADS1278IPAPT only when 16-bit resolution is insufficient; retains identical layout and firmware interface. |
| AD7608BSTZ | SAR architecture, 18-bit, 200kSPS aggregate (25kSPS/channel), no inherent simultaneous sampling - uses sequencer with ~100ns inter-channel skew | Suitable for mixed-signal systems needing faster per-channel throughput but tolerant of minor timing mismatch | Choose AD7608BSTZ when higher speed per channel outweighs need for perfect phase coherence; requires different timing control logic. |
Compared with ADS1178IPAPT, ADS1278IPAPT offers 8 additional bits at the cost of 2× power and halved data rate, while AD7608BSTZ trades simultaneous sampling for higher per-channel speed and simpler anti-aliasing - making ADS1178IPAPT optimal for phase-critical, thermally stable, medium-speed multi-channel acquisition.
Availability
ADS1178IPAPT is available at Aetrix Electronics and suitable for 3-phase power monitors, vibration analysis systems, Coriolis flow meters, and medical ECG/defibrillator designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADS1178IPAPT 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 converters and industrial signal chain solutions.
The ADS1178IPAPT belongs to TI's high-performance delta-sigma ADC family designed specifically for simultaneous multi-channel acquisition in demanding industrial, energy, and medical instrumentation applications.
FAQ
What is the maximum master clock frequency supported by ADS1178IPAPT?
The ADS1178IPAPT supports a maximum master clock (CLK) frequency of 27 MHz, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This clock drives both the modulator sampling and digital filter operation. At 27 MHz with CLKDIV = 0, the modulator frequency is 6.75 MHz in High-Speed mode, yielding a 52.734 kSPS output data rate. Exceeding 27 MHz may cause timing violations or permanent damage.
Does ADS1178IPAPT require external configuration registers or firmware initialization?
No, ADS1178IPAPT uses pin-driven configuration - all operational parameters (SPI vs. Frame-Sync interface, High-Speed vs. Low-Power mode, TDM format, and per-channel power-down) are set by static logic levels on FORMAT[2:0], MODE, and PWDN[8:1] pins. There are no internal registers to program, eliminating boot-time configuration overhead and improving system reliability.
How does ADS1178IPAPT achieve simultaneous sampling across all eight channels?
The ADS1178IPAPT achieves true simultaneous sampling by deriving all eight modulator sampling clocks from a single master CLK input, with matched internal propagation delays and synchronized FIR filter convolution start cycles. This architecture ensures inter-channel sampling skew <100 ps and phase match <±0.1° across 0–25 kHz, verified in the Functional Description and Timing sections of the datasheet.
Can ADS1178IPAPT interface directly with a 1.8V microcontroller SPI port?
Yes, ADS1178IPAPT supports IOVDD from 1.65 V to 3.6 V, and its digital I/Os (DIN, DOUT, SCLK, DRDY/FSYNC) are fully compliant with 1.8 V logic levels: VIH = 0.7×IOVDD (≥1.26 V), VIL = 0.3×IOVDD (≤0.54 V), VOH ≥0.8×IOVDD, VOL ≤0.2×IOVDD. No level-shifting circuitry is required when interfacing with 1.8 V MCUs.
What is the guaranteed temperature range for full specification compliance of ADS1178IPAPT?
The ADS1178IPAPT is fully specified over the extended industrial temperature range of –40°C to +105°C, with all key parameters - including INL (±1 LSB), offset drift (2 µV/°C), gain drift (2 ppm/°C), SNR (92 dB min), and power consumption - guaranteed across this range per the Electrical Characteristics table and Operating Temperature Range specification.
ADS1178IPAPT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-PowerTQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 52k
- Number of Inputs:
- 8
- Input Type:
- Differential, Single Ended
- 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:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 64-HTQFP (10x10)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1178IPAPT FAQ
1.How can I place an order for ADS1178IPAPT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1178IPAPT 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 ADS1178IPAPT reliable?
The price and inventory of ADS1178IPAPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1178IPAPT is usually 5 days.
3.What payment methods are accepted for ADS1178IPAPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1178IPAPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1178IPAPT?
ADS1178IPAPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1178IPAPT 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 ADS1178IPAPT?
For technical support, including ADS1178IPAPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1178IPAPT requirements.
6.How does Aetrix verify that ADS1178IPAPT is sourced from the original manufacturer or authorized distributors?
All ADS1178IPAPT 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 ADS1178IPAPT meets industry standards.
7.What is the process for return or replacement of ADS1178IPAPT?
All ADS1178IPAPT units undergo pre-shipment inspection (PSI). If there is an issue with ADS1178IPAPT, 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 ADS1178IPAPT part is unused and in its original packaging.
Return procedure for ADS1178IPAPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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