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Texas Instruments ADS1282IPW-1
- Part No.:
- ADS1282IPW-1
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS1282IPW-1.pdf
- Description:
- ANALOG DATA CONVERTR
- Quantity:
- Payment:
- Shipping:
Inventory:957
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Product details
Overview
ADS1282IPW-1 from Texas Instruments is an ultra-high-precision, 32-bit delta-sigma analog-to-digital converter with integrated 1–64× programmable gain amplifier (PGA), two-channel analog multiplexer, and fourth-order modulator. It delivers 130-dB SNR at 250 SPS, ±0.5 ppm INL, and –122 dB THD, targeting seismic monitoring and energy exploration instrumentation where low-noise geophone/hydrophone interfacing and high DC accuracy are critical.
For engineers reviewing the ADS1282IPW-1 datasheet, ADS1282IPW-1 pinout, ADS1282IPW-1 application, or ADS1282IPW-1 equivalent, key selection considerations include its TSSOP-28 package, 25 mW normal-power operation, selectable FIR filter data rates (250–4 kSPS), on-chip offset/gain calibration engine, and support for bipolar (±2.5 V) or unipolar (+5 V) analog supplies.
Technical Context
The ADS1282IPW-1 implements a fourth-order, inherently stable ΔΣ modulator with pipelined 2+2 architecture, enabling predictable over-range recovery without self-resetting behavior. Its digital filter chain includes a fifth-order sinc stage, decimate-by-32 FIR (linear or minimum-phase), and programmable high-pass IIR filter with corner adjustable from 0.1 Hz to 10 Hz.
Input signal conditioning uses a continuous-time, differential-in/differential-out PGA with 5 nV/√Hz input-referred noise (chop-on), 100 GΩ input impedance (chop-off), and internal 400 Ω test resistors for self-calibration modes. The two-channel MUX supports five configurations including dual-input shorting and common-mode testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 32-bit output word with no missing codes; enables sub-microvolt DC measurement resolution in seismic sensor front-ends. |
| SNR | 130 dB at 250 SPS (PGA = 1); corresponds to ~1.7 μVRMS input-referred noise for ±2.5 V reference. |
| INL | ±0.5 ppm FSR; ensures <±1 LSB error across full scale at 32-bit depth for precision metrology. |
| THD | –122 dB at 31.25 Hz (PGA = 1); supports high-fidelity spectral analysis of low-frequency earth signals. |
| Data Rate | 250–4000 SPS in FIR mode; matches industry-standard seismic sampling intervals (e.g., 1 ms to 4 ms per sample). |
| PGA Gain | 1× to 64× programmable via register bits; allows direct interface to geophones (low-Z) and hydrophones (high-Z) without external amplification. |
| Power Dissipation | 25 mW normal operation; enables dense channel count in multi-sensor arrays while maintaining thermal stability. |
Pinout & Package
TSSOP-28 package with 0.65 mm pitch, 9.7 mm × 4.4 mm body, and exposed thermal pad (not electrically connected). Designed for industrial temperature range (–40°C to +85°C) with extended operation up to +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Master clock input | Accepts 1–4.096 MHz crystal or oscillator; determines modulator clock and timing base for all internal operations. |
| SCLK, DIN, DOUT, DRDY | Serial interface signals | 4-wire SPI-compatible interface; DRDY falling edge triggers valid DOUT read; supports daisy-chaining multiple devices. |
| AINP1/AINN1, AINP2/AINN2 | Differential analog inputs | Two independent 24-bit input channels; MUX selects between them or configures self-test modes (shorted, 400 Ω, common-mode). |
| VREFP/VREFN | Reference voltage inputs | Accept 0.5–5 V differential reference; sets full-scale range as ±VREF/(2 × PGA); supports ratiometric sensor measurements. |
| CAPP/CAPN | PGA differential outputs | Require 10 nF C0G capacitor between pins to suppress modulator sampling glitches and serve as anti-alias filter. |
| PWDN, RESET, SYNC | Control inputs | PWDN (active-low) enters 10 μW shutdown; RESET clears registers and restarts conversion; SYNC synchronizes multiple ADS1282IPW-1 devices to external event or frame clock. |
| MFLAG | Modulator over-range flag | Open-drain output; logic high indicates modulator saturation-critical for real-time overload detection in field-deployed sensors. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip calibration engine | Registers for offset and gain scaling enable system-level calibration without external DACs or precision references. |
| Programmable high-pass filter | Adjustable corner (0.1–10 Hz) removes DC drift and thermal offsets while preserving low-frequency seismic content. |
| Inherently stable modulator | No self-resetting or metastability during overdrive; guarantees deterministic recovery and clean data stream after transient overload. |
| Chopper-stabilized PGA | 5 nV/√Hz noise density with flat spectrum up to 1 kHz; eliminates 1/f noise and drift for ultra-stable DC measurements. |
| Flexible power supply | Separate AVDD/AVSS (±2.5 V or +5 V) and DVDD (1.8–3.3 V) rails isolate analog and digital domains, reducing supply coupling in noisy environments. |
Applications
| Seismic Data Acquisition | Energy Exploration Survey Systems |
|---|---|
Use Scenario: Deployed in borehole or surface arrays to digitize weak ground-motion signals from geophones over extended periods. IC Role / Device Role / Timing Role: Primary ADC front-end with integrated PGA and MUX, performing low-noise, high-resolution digitization at 250–1000 SPS. Use Value: 130-dB SNR and ±0.5 ppm INL ensure detection of sub-nanometer displacement events; SYNC input enables precise time alignment across hundreds of distributed nodes. | Use Scenario: Integrated into portable seismic recording units used in oil/gas exploration to capture reflected waveforms from subsurface layers. IC Role / Device Role / Timing Role: High-accuracy ADC with on-chip calibration and programmable HPF, operating from battery-supplied ±2.5 V analog rails. Use Value: 25 mW power dissipation extends field battery life; 100 GΩ input impedance (chop-off) minimizes loading on high-impedance hydrophone sensors. |
| High-Accuracy Instrumentation | Geophysical Signal Processing |
Use Scenario: Used in laboratory-grade vibration analyzers and structural health monitoring systems requiring traceable DC accuracy. IC Role / Device Role / Timing Role: Precision ADC with built-in offset/gain correction registers, supporting NIST-traceable calibration workflows. Use Value: Offset error reduced to 1 μV post-calibration and gain error to 0.0002% enable <1 ppm measurement uncertainty over temperature. | Use Scenario: Embedded in real-time seismic processing modules that perform on-the-fly spectral analysis and noise suppression. IC Role / Device Role / Timing Role: ADC with configurable FIR/IIR filtering and 32-bit output, feeding FPGA-based FFT engines. Use Value: Use Value: Selectable linear/minimum-phase FIR response preserves phase coherence for time-domain waveform analysis; 4 kSPS maximum rate supports high-resolution shallow-earth imaging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1283IPW | Higher SNR (132 dB @ 250 SPS), improved THD (–125 dB), but fixed 32× PGA only; no MUX; TSSOP-28 pinout identical. | Optimized for single-channel, ultra-low-noise applications where MUX and variable PGA are unnecessary. | Select ADS1283IPW when absolute best noise performance is required and system design uses only one sensor channel. |
| AD7768-1BCPZ | 8-channel, 24-bit, 256 kSPS max; lower SNR (112 dB @ 128 kSPS); requires external PGA; LFCSP-32 package. | Targets high-channel-count, medium-speed data loggers rather than ultra-low-noise single-channel seismic acquisition. | Choose AD7768-1BCPZ for multi-sensor systems needing parallel sampling and higher throughput, accepting trade-offs in DC accuracy and noise floor. |
Compared with ADS1282IPW-1, ADS1283IPW offers superior noise and linearity but sacrifices input flexibility and programmability, while AD7768-1BCPZ provides channel density and speed at the cost of resolution and low-frequency fidelity-making ADS1282IPW-1 the optimal balance for demanding single-channel geophysical sensing.
Availability
ADS1282IPW-1 is available at Aetrix Electronics and suitable for seismic monitoring, energy exploration survey systems, and high-accuracy instrumentation requiring stable component supply across long product lifecycles and harsh environmental conditions.
Supply support for ADS1282IPW-1 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 deep expertise in precision data acquisition and industrial signal chain solutions.
The ADS1282IPW-1 belongs to TI's high-resolution delta-sigma ADC product line, engineered specifically for geophysical sensing applications demanding extreme DC accuracy, ultra-low noise, and robust operation in field-deployed instrumentation.
FAQ
What is the maximum data rate supported by ADS1282IPW-1 in FIR filter mode?
The ADS1282IPW-1 supports a maximum data rate of 4000 samples per second (SPS) in FIR filter mode. This rate is confirmed in the Electrical Characteristics table under "Data rate" with fDATA = 4000 SPS for FIR mode. At this rate, SNR drops to 118 dB (PGA = 1), maintaining sufficient dynamic range for high-speed seismic profiling while retaining 32-bit output resolution. The device also supports up to 128 kSPS in sinc-only mode, but FIR mode is recommended for final system output due to superior stopband attenuation.
Does ADS1282IPW-1 support both unipolar and bipolar analog input configurations?
Yes, ADS1282IPW-1 supports both configurations via its AVDD and AVSS supply pins. For unipolar operation, AVDD = +5 V and AVSS = 0 V yields a 0 V to +5 V analog supply range. For true bipolar operation, AVDD = +2.5 V and AVSS = –2.5 V establishes a ±2.5 V range, enabling ground-referenced differential inputs. The full-scale input voltage is always ±VREF/(2 × PGA), and VREFP/VREFN must be set accordingly-e.g., VREFP = +2.5 V and VREFN = –2.5 V for bipolar use.
How does the SYNC input function in ADS1282IPW-1 for multi-device synchronization?
The SYNC input in ADS1282IPW-1 resets both the digital filter and modulator simultaneously, ensuring deterministic phase alignment across multiple devices. When asserted, it forces all ADS1282IPW-1 units to begin new conversion cycles at the same clock edge. It also accepts a continuously toggled external frame clock locked to the desired data rate, enabling continuous alignment without manual triggering. This capability is essential for coherent beamforming in multi-node seismic arrays and is validated in the Timing Diagram section of the datasheet.
What is the purpose of the BYPAS pin on ADS1282IPW-1, and how must it be configured?
The BYPAS pin (Pin 28) is the output of an internal LDO sub-regulator that powers the digital core from DVDD. It must be decoupled with a 1 μF ceramic capacitor to DGND to ensure stable low-noise operation. BYPAS must not drive external circuitry-its sole function is internal DVDD regulation. Failure to install the capacitor causes increased digital supply noise, degrading SNR by up to 6 dB and introducing spurious tones, as documented in the "Power Supply" section of the datasheet.
Can ADS1282IPW-1 operate with hydrophone sensors, and what configuration is recommended?
ADS1282IPW-1 can interface with hydrophones, but TI recommends the ADS1282H variant for optimal performance with high-impedance sensors. The base ADS1282IPW-1 is specified for geophone use (<50 kΩ source impedance). For hydrophones, configure the PGA in chop-off mode to achieve 100 GΩ input impedance and disable the internal 400 Ω test resistors via MUX register settings. External guarding and low-leakage PCB layout are mandatory to preserve input bias current specs (1 nA max).
ADS1282IPW-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 31
- Sampling Rate (Per Second):
- 4k
- Number of Inputs:
- 2
- 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 ~ 3.6V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1282IPW-1 FAQ
1.How can I place an order for ADS1282IPW-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1282IPW-1 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 ADS1282IPW-1 reliable?
The price and inventory of ADS1282IPW-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1282IPW-1 is usually 5 days.
3.What payment methods are accepted for ADS1282IPW-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1282IPW-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1282IPW-1?
ADS1282IPW-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1282IPW-1 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 ADS1282IPW-1?
For technical support, including ADS1282IPW-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1282IPW-1 requirements.
6.How does Aetrix verify that ADS1282IPW-1 is sourced from the original manufacturer or authorized distributors?
All ADS1282IPW-1 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 ADS1282IPW-1 meets industry standards.
7.What is the process for return or replacement of ADS1282IPW-1?
All ADS1282IPW-1 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1282IPW-1, 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 ADS1282IPW-1 part is unused and in its original packaging.
Return procedure for ADS1282IPW-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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