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Texas Instruments ADS8329IPW
- Part No.:
- ADS8329IPW
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS8329IPW.pdf
- Description:
- IC ADC 16BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,191
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Product details
Overview
ADS8329IPW from Texas Instruments is a low-power, 16-bit, 1-MSPS unipolar-input SAR analog-to-digital converter with integrated sample-and-hold, serial SPI/DSP interface, and built-in conversion clock. It operates from 2.7 V to 5.5 V analog supply, delivers ±1.75 LSB max INL and 93 dB SNR at 10 kHz, and targets precision data acquisition in industrial process control systems.
For engineers reviewing the ADS8329IPW datasheet, ADS8329IPW pinout, ADS8329IPW application, or ADS8329IPW equivalent, this page provides verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options for high-accuracy, low-power 16-bit ADC selection in embedded measurement systems.
Technical Context
The ADS8329IPW implements a capacitor-based successive approximation register (SAR) architecture with inherent sample-and-hold, supporting both manual and auto-triggered conversion modes via CONVST and FS/CS. It uses an internal 22.9 MHz conversion clock (CCLK) derived from SCLK, enabling deterministic 18-cycle conversion time (18 CCLKs) and 1-MHz throughput at +VA ≥ 3 V.
Its unipolar input range spans 0 V to VREF (up to 5.5 V), with differential input structure (+IN/–IN) referenced to AGND; –IN is typically grounded. The device supports daisy-chain operation via EOC/INT/CDI and SDO/SDI, and offers programmable polarity/status output on EOC/INT with configurable TAG bit for multi-device synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonic output with no missing codes over full temperature range. |
| Sampling Rate | 1 MSPS at +VA ≥ 3 V - enables real-time capture of signals up to 500 kHz Nyquist bandwidth. |
| INL | ±1.75 LSB max - ensures end-point linearity error ≤ ±0.027% FSR for calibrated sensor interfacing. |
| SNR | 93 dB at fI = 10 kHz - supports >15-bit effective resolution in narrowband measurement applications. |
| Power Dissipation | 15.5 mW at 1 MSPS, +VA = 3 V, +VBD = 1.8 V - enables battery-operated or thermally constrained designs. |
| Reference Input | 0.3 V to +VA - accepts external reference from 2.5 V to 5 V, enabling flexible full-scale scaling. |
| Operating Temp | –40°C to +85°C - fully specified for industrial ambient conditions without derating. |
Pinout & Package
TSSOP-16 package (PW designation) with exposed thermal pad internally connected to substrate; pad may be tied to AGND or left floating but must remain isolated from digital ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 3) | Analog input, noninverting | Primary single-ended analog input node; accepts 0 V to VREF unipolar signal relative to –IN. |
| –IN (Pin 4) | Analog input, inverting | Common-mode reference point; typically grounded to enable true single-ended operation. |
| REF+ (Pin 7) | Reference voltage input | Positive terminal of external voltage reference; sets full-scale range for conversion. |
| REF– (Pin 6) | Reference voltage return | Must connect to AGND via dedicated via to minimize noise coupling into reference path. |
| CONVST (Pin 9) | Conversion start trigger | Edge-sensitive input that freezes sample-and-hold and initiates conversion on next internal clock edge. |
| EOC/INT/CDI (Pin 10) | Status/data chain input | Configurable as end-of-conversion flag, interrupt output, or daisy-chain data input in multi-ADC systems. |
| FS/CS (Pin 11) | Frame sync / chip select | Active-low SPI slave select; also serves as frame sync for TMS320 DSP interface mode. |
| SCLK (Pin 15) | Serial clock input | Drives SPI timing; supports up to 50 MHz for I/O-only mode or 42 MHz when also used as conversion clock. |
| SDI (Pin 12) | Serial data input | Accepts configuration commands (e.g., reset, polarity setup) and channel select bits in dual-mode variants. |
| SDO (Pin 13) | Serial data output | Outputs 16-bit straight-binary result MSB-first; tri-state controlled by CS/FS deassertion. |
| +VA (Pin 1) | Analog supply | 2.7 V to 5.5 V power for analog core and reference buffer; separate from digital I/O supply. |
| +VBD (Pin 16) | Digital I/O supply | 1.65 V to 5.5 V logic supply; enables level-shifting between host controller and ADC interface. |
| AGND (Pin 5) | Analog ground | Return for analog circuitry and reference; must be star-connected and isolated from BDGND. |
| BDGND (Pin 14) | Digital interface ground | Return for SCLK, SDI, SDO, FS/CS; separates digital switching noise from analog section. |
| NC (Pin 8) | No connection | Internally unconnected; must remain unpopulated or floated on PCB. |
| RESERVED (Pin 2) | Factory-reserved | Connect to AGND or +VA per layout guidelines; not user-accessible for functional use. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in conversion clock (CCLK) | Eliminates need for external clock source; internal 22.9 MHz oscillator ensures consistent timing across temperature and voltage. |
| Programmable EOC/INT polarity | Allows active-high or active-low status signaling to match host processor GPIO requirements without external inverters. |
| Multi-chip daisy chain mode | Enables synchronized sampling across multiple ADS8329IPW devices using single SCLK/SDI and cascaded SDO→CDI paths. |
| Comprehensive power-down modes | Deep power-down (50 nA) and Nap/Auto-Nap (0.5 µA) extend battery life in intermittent-sampling applications. |
| Global CONVST independent of CS | Supports simultaneous sampling across multiple converters even when individual CS lines are managed separately. |
Applications
| Industrial Process Monitoring | Medical Instrumentation |
|---|---|
Use Scenario: Continuous monitoring of pressure, flow, and temperature transducers in PLC-based control cabinets with 4–20 mA loop integration. IC Role / Device Role / Timing Role: Primary 16-bit ADC digitizing conditioned analog outputs from precision instrumentation amplifiers. Use Value: ±1.75 LSB INL and 93 dB SNR ensure <0.03% full-scale error in closed-loop feedback control under industrial EMI conditions. | Use Scenario: High-fidelity acquisition of biopotential signals (ECG, EEG) in portable diagnostic equipment with low-noise front-end. IC Role / Device Role / Timing Role: Final-stage ADC after programmable gain amplifier and anti-alias filter, operating at 1 MSPS for oversampling. Use Value: 15.5 mW power at 3 V enables 8+ hour battery runtime while maintaining >15-bit ENOB for clinical-grade waveform fidelity. |
| Magnetometer Signal Conditioning | Data Acquisition Systems |
Use Scenario: Digitizing low-level magnetic field outputs from fluxgate or AMR sensors in navigation and geophysical survey tools. IC Role / Device Role / Timing Role: Precision ADC capturing DC-coupled, microvolt-level differential signals with high CMRR and low offset drift. Use Value: ±0.5 mV max offset error at 3 V and 70 dB CMRR suppress baseline shifts caused by thermal gradients in handheld enclosures. | Use Scenario: Modular rack-mounted DAQ modules requiring synchronized multi-channel sampling with minimal board space. IC Role / Device Role / Timing Role: Single-ended ADC in compact 16-pin TSSOP footprint supporting daisy-chained readout for 8+ channel expansion. Use Value: TSSOP-16 package and chain-mode capability reduce PCB area and interconnect complexity versus QFN alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8329IRSAR | Same silicon die in 4×4 mm QFN-16 (RSA); thermal pad requires PCB land pattern and solder paste stencil. | Preferred for high-density layouts or improved thermal performance in convection-cooled enclosures. | Select IRSAR when board space is constrained or junction temperature must stay below 105°C under continuous 1-MSPS operation. |
| ADS8327IPW | 500 kSPS variant with identical pinout, package, and interface; lower power (7.8 mW at 500 kSPS) and relaxed AC specs (89 dB SNR). | Suitable for cost-sensitive or lower-bandwidth applications where 1-MSPS is unnecessary. | Choose ADS8327IPW if system sampling requirement is ≤500 kSPS and SNR >88 dB suffices for accuracy budget. |
Compared with ADS8329IRSAR, the ADS8329IPW trades thermal performance for simplified assembly and rework; compared with ADS8327IPW, it delivers double the throughput and +4 dB SNR at the cost of +100% power consumption at full rate.
Availability
ADS8329IPW is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, magnetometer signal conditioning, and modular data acquisition systems requiring stable component supply across extended production lifecycles.
Supply support for ADS8329IPW 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 company specializing in analog, embedded processing, and connectivity technologies with over 50 years of innovation in precision data converters.
The ADS8329IPW belongs to TI's low-power, high-speed SAR ADC family designed for precision measurement in space- and power-constrained industrial and medical systems where 16-bit resolution and sub-2 LSB linearity are critical.
FAQ
What is the maximum sampling rate supported by the ADS8329IPW?
The ADS8329IPW supports a maximum sampling rate of 1 MSPS when the analog supply voltage (+VA) is between 3 V and 5.5 V. At +VA = 2.7 V, the maximum rate drops to 900 kSPS due to internal clock limitations. This rate is sustained across the full industrial temperature range (–40°C to +85°C) with guaranteed timing margins per the datasheet's timing characteristics table.
Does the ADS8329IPW require an external reference voltage?
Yes, the ADS8329IPW requires an external reference voltage applied between REF+ and REF– pins. It accepts references from 0.3 V up to +VA, with typical configurations using 2.5 V or 5 V. The device does not include an internal reference; reference accuracy and stability directly determine overall ADC absolute accuracy, including gain error and full-scale drift.
Can the ADS8329IPW operate with different analog and I/O supply voltages?
Yes, the ADS8329IPW supports independent analog (+VA: 2.7 V to 5.5 V) and digital I/O (+VBD: 1.65 V to 5.5 V) supplies. This allows interfacing with 1.8 V, 3.3 V, or 5 V controllers while maintaining optimal analog performance. Level translation is handled internally, eliminating external level shifters for SCLK, SDI, and SDO signals.
How does the daisy-chain mode work on the ADS8329IPW?
In daisy-chain mode, multiple ADS8329IPW devices share one SCLK and SDI line, with SDO of each device connected to CDI (EOC/INT/CDI pin) of the next. A single CS/FS signal triggers all devices simultaneously, and results are shifted out sequentially on the shared SDO line. This enables synchronized sampling and reduced SPI bus loading in multi-channel systems.
What are the power-down modes available on the ADS8329IPW and their current draw?
The ADS8329IPW offers three power-down modes: Deep Power-Down (4–50 nA), Nap Mode (0.3–0.5 µA), and Auto-Nap Mode (same current as Nap). Deep Power-Down halts all internal clocks and resets registers; Nap retains configuration and exits in <1 µs. These modes are controlled via SPI command and are essential for battery-powered applications requiring microamp-level quiescent current between conversions.
ADS8329IPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 1.65V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8329IPW FAQ
1.How can I place an order for ADS8329IPW through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8329IPW 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 ADS8329IPW reliable?
The price and inventory of ADS8329IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8329IPW is usually 5 days.
3.What payment methods are accepted for ADS8329IPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8329IPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8329IPW?
ADS8329IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8329IPW 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 ADS8329IPW?
For technical support, including ADS8329IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8329IPW requirements.
6.How does Aetrix verify that ADS8329IPW is sourced from the original manufacturer or authorized distributors?
All ADS8329IPW 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 ADS8329IPW meets industry standards.
7.What is the process for return or replacement of ADS8329IPW?
All ADS8329IPW units undergo pre-shipment inspection (PSI). If there is an issue with ADS8329IPW, 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 ADS8329IPW part is unused and in its original packaging.
Return procedure for ADS8329IPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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