My Inquiry
My Account
Texas Instruments ADS1278SHFQ
- Part No.:
- ADS1278SHFQ
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 84-CBFQFP Exposed Pad and Tie Bar
- Datasheet:
-
ADS1278SHFQ.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 84CFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,794
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS1278SHFQ from Texas Instruments is an octal simultaneous-sampling 24-bit delta-sigma analog-to-digital converter optimized for extreme-temperature industrial data acquisition. It delivers 111-dB SNR in High-Resolution mode at 52 kSPS, supports –55°C to 210°C operation, features linear-phase digital filtering with ±0.005 dB passband ripple, and interfaces via SPI or Frame-Sync protocol - enabling high-precision vibration analysis and down-hole drilling sensor systems.
For engineers reviewing the ADS1278SHFQ datasheet, ADS1278SHFQ pinout, ADS1278SHFQ application, or ADS1278SHFQ equivalent, this page provides verified technical context, exact pin functions for the 84-pin HFQ package, confirmed operating modes (High-Speed/High-Resolution/Low-Power/Low-Speed), real-world acoustics and pressure-sensing use cases, and two validated alternative part numbers with documented functional trade-offs.
Technical Context
The ADS1278SHFQ integrates a high-order chopper-stabilized modulator achieving 0.8-μV/°C offset drift and 1.3-ppm/°C gain drift across –55°C to 210°C. Its onboard decimation filter enables up to 62-kHz usable bandwidth (90% of Nyquist) with <0.005 dB passband ripple and >100 dB stopband attenuation.
All four operating modes - High-Speed (128 kSPS, 106 dB SNR), High-Resolution (52 kSPS, 111 dB SNR), Low-Power (52 kSPS, 31 mW/ch), and Low-Speed (10 kSPS, 7 mW/ch) - are controlled directly by MODE[1:0] pins; no register programming is required. The device supports both TDM and discrete-channel output formats via FORMAT[2:0].
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit with no missing codes - guarantees monotonicity and full-scale linearity for precision sensor digitization. |
| Data Rate | Up to 128 kSPS (High-Speed mode) with simultaneous sampling across all eight channels - eliminates inter-channel timing skew. |
| SNR | 111 dB (High-Resolution mode, 52 kSPS) - enables detection of sub-microvolt signals in dynamic strain gauge applications. |
| THD | –108 dB (1 kHz input, –0.5 dBFS) - preserves signal fidelity in acoustic measurement and modal analysis. |
| Operating Temp | –55°C to +210°C (fully specified) - supports deployment in down-hole drilling tools and jet engine monitoring without derating. |
| Input Impedance | 14 kΩ differential (High-Speed/High-Resolution modes) - simplifies anti-aliasing filter design for high-bandwidth transducers. |
| Power Dissipation | 985 mW max (High-Speed mode) - requires thermal management in sealed HFQ-package environments above 175°C. |
Pinout & Package
ADS1278SHFQ is housed in an 84-pin HFQ package with exposed thermal pad, rated for –55°C to +210°C operation. Pin assignments follow TI's standardized layout for octal delta-sigma ADCs, with dedicated analog/digital ground separation and independent I/O supply (IOVDD = 1.65 V to 3.6 V).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP[8:1], AINN[8:1] | Differential analog inputs | Eight fully isolated differential input pairs; each pair accepts ±VREF full-scale range with common-mode voltage fixed at AVDD/2. |
| VREFP / VREFN | Reference voltage inputs | Accept 0.5 V to 2.6 V reference span (dependent on fCLK); define absolute measurement accuracy and scale factor stability. |
| MODE[1:0] | Operating mode select | Hardware-configured selection of High-Speed/High-Resolution/Low-Power/Low-Speed - eliminates firmware dependency for mode switching. |
| FORMAT[2:0] | Interface and output format control | Configures SPI vs Frame-Sync protocol, TDM vs discrete outputs, and modulator bypass - enables flexible system-level integration. |
| PWDN[8:1] | Per-channel power-down | Independent enable/disable of individual ADC channels - reduces total system power when fewer than eight channels are active. |
| DRDY/FSYNC | Multi-function timing signal | In SPI mode: open-drain data-ready flag; in Frame-Sync mode: frame clock input - supports both master and slave synchronization schemes. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous 8-channel sampling | Eliminates phase mismatch between channels - critical for coherent multi-axis vibration analysis and beamforming. |
| Linear-phase digital filter | Ensures zero group delay distortion across 62-kHz bandwidth - preserves transient integrity in acoustic pulse capture. |
| Modulator output option | Bypasses decimation filter to expose raw bitstream - enables custom digital filtering or oversampled processing in FPGA-based systems. |
| Low sampling aperture error | Minimizes time-skew-induced harmonic distortion - improves THD performance in high-frequency signal acquisition. |
| Chopper-stabilized modulator | Reduces 1/f noise and drift - achieves 0.8-μV/°C offset drift over full temperature range without calibration. |
Applications
| Down-Hole Drilling Monitoring | Vibration/Modal Analysis |
|---|---|
Use Scenario: Real-time acquisition of triaxial accelerometer and pressure sensor outputs inside oil/gas wellbores at 175°C+ ambient. IC Role / Device Role / Timing Role: Simultaneous 8-channel ADC capturing synchronized strain, temperature, and directional data with <100 ns inter-channel skew. Use Value: Enables closed-loop drill-bit control using undistorted frequency-domain analysis up to 62 kHz under extreme thermal stress. |
Use Scenario: Multi-point structural vibration measurement on turbine blades or aircraft fuselages during qualification testing. IC Role / Device Role / Timing Role: High-resolution digitizer for piezoelectric sensors, delivering 111 dB SNR at 52 kSPS with linear-phase response. Use Value: Resolves closely spaced resonant modes (<0.5 Hz separation) without phase-induced smearing in FFT post-processing. |
| Acoustics/Dynamic Strain Gauges | Pressure Sensors in Harsh Environments |
Use Scenario: Capturing transient acoustic emissions from composite material fatigue in wind turbine gearboxes at 150°C. IC Role / Device Role / Timing Role: Low-noise ADC with –108 dB THD and 111 dB SNR, sampling eight MEMS microphones simultaneously. Use Value: Detects sub-microsecond crack-propagation signatures buried 110 dB below full-scale without harmonic contamination. |
Use Scenario: High-accuracy differential pressure sensing in jet engine combustion chambers with ambient temperatures up to 210°C. IC Role / Device Role / Timing Role: Ratiometric ADC interfacing with bridge-based pressure transducers, rejecting common-mode thermal drift. Use Value: Maintains 0.1% FSR total unadjusted error over full temperature range without per-unit calibration. |
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 |
|---|---|---|---|
| ADS1278HPAP | Same core architecture and specs, but in HTQFP-64 PowerPAD package rated for –55°C to +175°C (not 210°C). | Limited to lower-temperature down-hole or industrial control applications where 210°C rating is unnecessary. | Select when thermal budget allows standard QFP packaging and PCB assembly compatibility is prioritized over extreme-temperature capability. |
| ADS131M08IPBS | 8-channel, 24-bit, 64 kSPS delta-sigma ADC; lower SNR (102 dB), wider supply range (2.7–5.25 V), no 210°C rating. | Targeted at battery-powered portable instrumentation and general-purpose industrial DAQ, not extreme-temperature deployment. | Choose for cost-sensitive, non-extreme-temperature designs requiring integrated PGA and lower power (12 mW/ch in low-power mode). |
Compared with ADS1278HPAP, ADS1278SHFQ extends operational life in 210°C environments via die and package enhancements; compared with ADS131M08IPBS, it trades off integrated signal conditioning for superior dc/ac accuracy and guaranteed high-temperature performance - making it irreplaceable for down-hole and aerospace-grade sensing.
Availability
ADS1278SHFQ is available at Aetrix Electronics and suitable for down-hole drilling monitoring, vibration/modal analysis, acoustic emission detection, and high-temperature pressure sensing requiring stable component supply across extended product lifecycles.
Supply support for ADS1278SHFQ 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 high-reliability, high-precision data converters.
The ADS1278 family was engineered specifically for extreme-temperature industrial data acquisition - combining chopper-stabilized modulator technology with robust packaging to meet the demands of down-hole, aerospace, and energy infrastructure applications.
FAQ
What is the maximum operating temperature specification for the ADS1278SHFQ?
The ADS1278SHFQ is fully specified over –55°C to +210°C junction temperature, validated for continuous operation in down-hole drilling tools and jet engine monitoring systems. This exceeds the –55°C to +175°C rating of the ADS1278HPAP variant and is enabled by TI's high-temperature silicon process and HFQ package construction.
Does the ADS1278SHFQ support hardware-only configuration without register writes?
Yes, the ADS1278SHFQ uses pin-strapped configuration: MODE[1:0] selects among High-Speed, High-Resolution, Low-Power, and Low-Speed modes; FORMAT[2:0] configures interface protocol and output format; and PWDN[8:1] enables per-channel power-down - all without SPI register access or firmware initialization.
What is the usable signal bandwidth of the ADS1278SHFQ in High-Resolution mode?
In High-Resolution mode (52 kSPS), the ADS1278SHFQ delivers a 62-kHz usable bandwidth - 90% of the Nyquist frequency - with less than ±0.005 dB passband ripple and >95 dB stopband attenuation, enabling accurate capture of wideband acoustic and vibration signals without phase distortion.
How does the ADS1278SHFQ handle reference voltage limitations at higher clock frequencies?
When operating at fCLK = 32.768 MHz (High-Speed mode only), the ADS1278SHFQ requires VREF ≤ 2.6 V. At fCLK = 27 MHz (all modes), VREF may range from 0.5 V to 3.1 V. This constraint ensures stable modulator operation and prevents reference-related gain errors at maximum throughput.
Can the ADS1278SHFQ interface directly with an FPGA using LVDS signaling?
No, the ADS1278SHFQ provides CMOS-level digital I/O (VIH = 0.7×IOVDD, VOL = 0.2×IOVDD) with IOVDD configurable from 1.65 V to 3.6 V. LVDS interfacing requires external level-shifting circuitry; however, its SPI and Frame-Sync protocols are FPGA-compatible with standard GPIO or dedicated serial logic resources.
ADS1278SHFQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 84-CBFQFP Exposed Pad and Tie Bar
- Packaging:
- Bulk
- 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:
- -55°C ~ 210°C
- Supplier Device Package:
- 84-CFP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1278SHFQ FAQ
1.How can I place an order for ADS1278SHFQ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1278SHFQ 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 ADS1278SHFQ reliable?
The price and inventory of ADS1278SHFQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1278SHFQ is usually 5 days.
3.What payment methods are accepted for ADS1278SHFQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1278SHFQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1278SHFQ?
ADS1278SHFQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1278SHFQ 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 ADS1278SHFQ?
For technical support, including ADS1278SHFQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1278SHFQ requirements.
6.How does Aetrix verify that ADS1278SHFQ is sourced from the original manufacturer or authorized distributors?
All ADS1278SHFQ 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 ADS1278SHFQ meets industry standards.
7.What is the process for return or replacement of ADS1278SHFQ?
All ADS1278SHFQ units undergo pre-shipment inspection (PSI). If there is an issue with ADS1278SHFQ, 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 ADS1278SHFQ part is unused and in its original packaging.
Return procedure for ADS1278SHFQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS1278SHFQ Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
