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Texas Instruments ADS8329IBPW
- Part No.:
- ADS8329IBPW
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS8329IBPW.pdf
- Description:
- IC ADC 16BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,713
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Product details
Overview
ADS8329IBPW from Texas Instruments is a low-power, 16-bit, 1-MSPS unipolar-input SAR analog-to-digital converter with built-in conversion clock, SPI/DSP-compatible serial interface, and ±1.75 LSB max INL over temperature. It operates from 2.7 V to 5.5 V analog supply and supports daisy-chain mode for multi-converter systems in industrial data acquisition.
For engineers reviewing the ADS8329IBPW datasheet, ADS8329IBPW pinout, ADS8329IBPW application, or ADS8329IBPW equivalent, key selection criteria include its guaranteed 16-bit no-missing-codes performance, ±0.5 mV max offset error at 3 V, 93 dB SNR at 10 kHz, programmable EOC/INT polarity, and TSSOP-16 package compatibility with space-constrained embedded signal chains.
Technical Context
The ADS8329IBPW implements a capacitor-based SAR architecture with inherent sample-and-hold, enabling single-shot or auto-triggered conversions. Its internal 22.3–24.5 MHz conversion clock eliminates external timing components while supporting up to 50 MHz SCLK for high-speed serial readout.
It features dual power domains (+VA for analog, +VBD for I/O), programmable status output (EOC/INT/CDI), global CONVST independent of CS, and comprehensive power-down modes - including deep power-down (4 nA) and nap mode (0.25 mA) - optimized for battery-powered instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with guaranteed no missing codes - ensures full dynamic range utilization without code gaps in precision measurement. |
| Sampling Rate | 1 MSPS at +VA ≥ 3 V; 900 kSPS at +VA = 2.7 V - enables real-time capture of fast transients in sensor interfaces. |
| INL (Max) | ±1.75 LSB over –40°C to +85°C - supports high-accuracy DC measurements in industrial process control. |
| SNR | 93 dB at fIN = 10 kHz - delivers clean digitization for low-noise analog front-ends in medical instruments. |
| Offset Error | ±0.5 mV max at +VA = 3 V - reduces calibration burden in portable magnetometer and transducer applications. |
| Power Dissipation | 15.5 mW at 1 MSPS, +VA = 3 V, +VBD = 1.8 V - extends battery life in handheld test equipment. |
| Interface | SPI/DSP-compatible serial with 16-bit straight-binary output - simplifies integration with TI C2000 and ARM Cortex-M microcontrollers. |
Pinout & Package
TSSOP-16 package with exposed thermal pad (internally connected to substrate); pin 1 marked by dot; NC pins must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VA (Pin 1) | Analog supply input | Accepts 2.7–5.5 V; powers SAR core and reference buffer - decoupling to AGND critical for noise performance. |
| +IN (Pin 3) | Noninverting analog input | Unipolar input referenced to –IN or COM; full-scale range = 0 V to VREF - used for single-ended sensor outputs. |
| –IN (Pin 4) | Inverting analog input | Typically tied to AGND; defines differential input pair with +IN - enables pseudo-differential operation. |
| REF+ (Pin 7) | External reference positive input | Accepts 0.3 V to +VA; sets ADC full-scale; requires low-impedance source - enables flexible scaling for varying sensor ranges. |
| REF– (Pin 6) | External reference negative input | Must connect to AGND via dedicated via - prevents ground bounce from corrupting reference accuracy. |
| CONVST (Pin 9) | Conversion start trigger | Edge-sensitive; freezes sample-and-hold and initiates conversion - allows precise timing control independent of CS. |
| FS/CS (Pin 11) | Frame sync / chip select | Active-low SPI slave select; also serves as DSP frame sync - enables interoperability with TI C5000/C6000 processors. |
| SCLK (Pin 15) | Serial clock input | Supports up to 50 MHz; drives both interface and internal conversion clock when configured - eliminates need for separate timing IC. |
| SDO (Pin 13) | Serial data output | 3-state, MSB-first, straight-binary - allows daisy-chaining multiple ADS8329IBPW devices on shared SDO line. |
| EOC/INT/CDI (Pin 10) | Status/chain data I/O | Configurable as end-of-conversion flag, interrupt, or daisy-chain input - provides flexible system-level synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in conversion clock (CCLK) | 22.3–24.5 MHz internal oscillator eliminates external crystal or clock generator - reduces BOM count and layout complexity. |
| Programmable EOC/INT polarity | Configurable active-high/low assertion via SPI register - simplifies interrupt handling across diverse MCU platforms. |
| Daisy-chain mode support | Enables synchronous sampling of up to 16 converters using single SCLK/CS - ideal for multi-channel data loggers. |
| Auto/nap/deep power-down modes | Deep power-down draws only 4 nA - extends operational time in energy-harvesting sensor nodes. |
| Global CONVST independent of CS | Allows simultaneous sampling across multiple devices regardless of individual CS states - ensures temporal coherence in distributed systems. |
Applications
| Industrial Process Control | Medical Instrumentation |
|---|---|
Use Scenario: Monitoring pressure, flow, and temperature in PLC-based control cabinets with 4–20 mA loop receivers. IC Role / Device Role / Timing Role: Precision digitization of conditioned analog sensor outputs with 16-bit resolution and low drift. Use Value: ±1.75 LSB INL and ±0.5 mV offset error ensure <0.01% FSR accuracy over –40°C to +85°C without recalibration. | Use Scenario: Digitizing ECG, EEG, and bioimpedance signals in portable diagnostic devices. IC Role / Device Role / Timing Role: High-SNR front-end ADC with 93 dB SNR at 10 kHz and low 33 µV RMS noise floor. Use Value: Enables detection of sub-microvolt physiological waveforms while maintaining battery life via 15.5 mW active power. |
| Magnetometer Systems | Data Acquisition Systems |
Use Scenario: Reading Hall-effect or fluxgate magnetometer outputs in navigation and geophysical survey tools. IC Role / Device Role / Timing Role: Low-noise, low-drift ADC capturing DC-stable magnetic field measurements. Use Value: ±0.5 mV max offset error at 3 V and +0.4 ppm/°C offset drift minimize thermal zero-shift in field-deployed units. | Use Scenario: Modular rack-mounted DAQ modules requiring synchronized multi-channel sampling. IC Role / Device Role / Timing Role: Daisy-chainable 16-bit ADC with global CONVST and 1 MSPS throughput. Use Value: Supports up to 16-channel coherent sampling with single SCLK/CS bus - reduces inter-channel skew to <5 ns aperture jitter. |
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 |
|---|---|---|---|
| ADS8327IPW | 500 kSPS max sampling rate; identical TSSOP-16 package and pinout; same INL/DNL specs but lower throughput. | Suitable for cost-sensitive, lower-bandwidth systems where 1 MSPS is unnecessary. | Select ADS8327IPW when system bandwidth ≤500 kSPS and power budget allows higher active current (22 mW at 500 kSPS). |
| ADS8860IPWR | 16-bit, 1 MSPS, SPI interface, but uses external clock only; no built-in CCLK; lower power (6.5 mW at 1 MSPS). | Requires external clock source; lacks EOC/INT programmability and daisy-chain capability. | Choose ADS8860IPWR for ultra-low-power designs where external clock is already available and multi-device synchronization is not required. |
Compared with ADS8327IPW and ADS8860IPWR, the ADS8329IBPW uniquely combines 1 MSPS throughput, integrated conversion clock, programmable status output, and daisy-chain support - making it optimal for compact, self-contained, multi-node precision acquisition systems.
Availability
ADS8329IBPW is available at Aetrix Electronics and suitable for industrial process control, portable medical instrumentation, magnetometer systems, and modular data acquisition systems requiring stable component supply and long-term manufacturability.
Supply support for ADS8329IBPW 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-grade signal chain solutions.
The ADS8329IBPW belongs to TI's low-power, high-speed SAR ADC family designed specifically for precision measurement in space- and power-constrained industrial, medical, and test equipment applications.
FAQ
What is the maximum sampling rate supported by the ADS8329IBPW?
The ADS8329IBPW 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. This behavior is specified in the Electrical Characteristics table under "Throughput rate" and confirmed across both 3 V and 2.7 V operating conditions in the TI SLAS516C datasheet.
Does the ADS8329IBPW require an external clock source for conversion?
No, the ADS8329IBPW does not require an external clock for conversion. It integrates an internal conversion clock (CCLK) operating at 22.3–24.5 MHz, which drives the SAR logic autonomously. The external SCLK is used solely for serial interface timing unless explicitly configured to also serve as the conversion clock - a feature documented in the Timing Characteristics section of the ADS8329IBPW datasheet.
What is the meaning of the 'IB' suffix in ADS8329IBPW?
The 'IB' suffix in ADS8329IBPW denotes the enhanced performance grade: ±1.75 LSB max INL, ±1 LSB max DNL, and ±0.5 mV max offset error at +VA = 3 V. This grade is distinct from the standard 'I' grade (±2.5 LSB INL, ±2 LSB DNL, ±0.8 mV offset), as defined in the Ordering Information table of the ADS8329IBPW datasheet.
Can the ADS8329IBPW operate with a 2.5 V external reference voltage?
Yes, the ADS8329IBPW supports a 2.5 V external reference voltage when +VA is between 2.7 V and 3.6 V. The REF+ input accepts 0.3 V to +VA, and the datasheet specifies VREF = 2.5 V as a valid condition for both 1 MSPS (at +VA ≥ 3 V) and 900 kSPS (at +VA = 2.7 V) operation - confirmed in the Electrical Characteristics tables under "EXTERNAL VOLTAGE REFERENCE INPUT".
Is the ADS8329IBPW pin-compatible with the ADS8330IBPW?
No, the ADS8329IBPW is not pin-compatible with the ADS8330IBPW. While both use the TSSOP-16 package, their pin functions differ: ADS8329IBPW has +IN/–IN inputs (Pins 3/4), whereas ADS8330IBPW uses +IN0/+IN1/COM (Pins 3/2/4). The Terminal Functions table in the ADS8329IBPW datasheet explicitly lists these as distinct mappings - confirming incompatible pin assignments despite shared package outline.
ADS8329IBPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- -
ADS8329IBPW FAQ
1.How can I place an order for ADS8329IBPW through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8329IBPW 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 ADS8329IBPW reliable?
The price and inventory of ADS8329IBPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8329IBPW is usually 5 days.
3.What payment methods are accepted for ADS8329IBPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8329IBPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8329IBPW?
ADS8329IBPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8329IBPW 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 ADS8329IBPW?
For technical support, including ADS8329IBPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8329IBPW requirements.
6.How does Aetrix verify that ADS8329IBPW is sourced from the original manufacturer or authorized distributors?
All ADS8329IBPW 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 ADS8329IBPW meets industry standards.
7.What is the process for return or replacement of ADS8329IBPW?
All ADS8329IBPW units undergo pre-shipment inspection (PSI). If there is an issue with ADS8329IBPW, 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 ADS8329IBPW part is unused and in its original packaging.
Return procedure for ADS8329IBPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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