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Texas Instruments ADS8329IPWG4
- Part No.:
- ADS8329IPWG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS8329IPWG4.pdf
- Description:
- IC ADC 16BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,430
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Product details
Overview
ADS8329IPWG4 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 ADS8329IPWG4 datasheet, ADS8329IPWG4 pinout, ADS8329IPWG4 application, or ADS8329IPWG4 equivalent, key selection criteria include its unipolar 0–VREF input range, programmable EOC/INT polarity, daisy-chain capability, deep power-down mode (4 nA), and TSSOP-16 package compatibility with space-constrained PCB layouts.
Technical Context
The ADS8329IPWG4 implements a capacitor-based SAR architecture with inherent sample-and-hold, supporting both manual (CONVST-triggered) and auto-triggered conversion modes. Its internal 22.9 MHz conversion clock (CCLK) enables 1-MHz throughput at +VA ≥ 3 V, with acquisition time fixed at 3 CCLK cycles and conversion time at 18 CCLK cycles.
It features dual-supply operation: +VA (2.7–5.5 V) powers the analog core and reference inputs (REF+, REF−), while +VBD (1.65–5.5 V) supplies digital I/O. The device supports SPI-compatible serial communication up to 50 MHz SCLK and includes configurable status output (EOC/INT/CDI) and frame sync (FS/CS) for DSP interfacing.
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 ~400 kHz Nyquist bandwidth. |
| INL | ±1.75 LSB max (ADS8329IB grade) - ensures <0.003% full-scale linearity error for high-fidelity measurements. |
| SNR | 93 dB at fIN = 10 kHz - supports >15-bit effective resolution in low-noise signal chains. |
| Power Dissipation | 15.5 mW at 1 MSPS, +VA = 3 V, +VBD = 1.8 V - suitable for battery-powered or thermally constrained designs. |
| Supply Ranges | +VA: 2.7–5.5 V; +VBD: 1.65–5.5 V - allows flexible partitioning of analog/digital rails and mixed-voltage system integration. |
| Operating Temp | –40°C to +85°C - fully specified for industrial environments without derating. |
Pinout & Package
TSSOP-16 package (PW designator) 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 |
|---|---|---|
| 1 (+VA) | Analog supply input | Primary analog rail (2.7–5.5 V); powers ADC core, reference buffer, and internal clock generator. |
| 3 (CONVST) | Conversion start trigger | Edge-sensitive input that freezes sample-and-hold and initiates conversion on next internal clock edge. |
| 4 (EOC/INT/CDI) | Status/data chain I/O | Configurable as end-of-conversion flag, interrupt output, or daisy-chain data input in multi-device systems. |
| 5 (FS/CS) | Frame sync / chip select | Active-low SPI slave select; also serves as frame sync for TI TMS320 DSP interface protocols. |
| 6 (SDI) | Serial data input | Accepts configuration commands (e.g., reset, polarity setup) and supports software-initiated conversion start. |
| 7 (SDO) | Serial data output | 3-state output delivering 16-bit straight-binary result MSB-first; supports daisy-chain readout. |
| 9 (SCLK) | Serial interface clock | Accepts external clock up to 50 MHz; doubles as internal conversion clock when configured for I/O+conversion mode. |
| 13 (+IN) | Noninverting analog input | Single-ended unipolar input referenced to AGND; full-scale range = 0 V to VREF. |
| 14 (–IN) | Inverting analog input | Internally tied to AGND by default; used for differential input configurations only in ADS8330 variant. |
| 15 (AGND) | Analog ground | Reference node for analog circuitry; must be routed separately from BDGND to minimize noise coupling. |
| 16 (REF+) | External reference positive | Accepts 0.3 V to +VA; supports external references up to 5.5 V (e.g., 2.5 V or 5 V precision sources). |
Key Features
| Feature | Design Value |
|---|---|
| Built-in conversion clock (CCLK) | Eliminates need for external timing source; enables deterministic 1-MSPS operation with minimal BOM count. |
| Programmable EOC/INT polarity | Allows synchronization with host processor interrupt logic regardless of active-high/active-low requirements. |
| Daisy-chain mode support | Enables cascaded readout of multiple ADS8329IPWG4 devices using single SCLK/SDO/SDI lines - reduces GPIO usage. |
| Deep power-down mode (4 nA) | Reduces system standby current by >99.9% versus active mode - critical for energy harvesting or battery longevity. |
| Auto/nap power-down entry | Hardware-automated transition to low-power state after conversion completes - no firmware overhead required. |
Applications
| Industrial Process Control | Medical Instrumentation |
|---|---|
|
Use Scenario: High-accuracy voltage/current monitoring in PLC analog input modules with 4–20 mA loop interfaces. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned sensor outputs; provides 16-bit resolution and <1 LSB INL for calibration traceability. Use Value: Enables sub-0.01% measurement accuracy across –40°C to +85°C without recalibration, meeting IEC 61000-6-2 immunity requirements. |
Use Scenario: Front-end digitization of ECG/EEG biopotential signals in portable patient monitors. IC Role / Device Role / Timing Role: Low-noise, low-power ADC capturing 10-kHz bandwidth bio-signals with 93 dB SNR and 105 dB SFDR. Use Value: Delivers clinical-grade signal fidelity while consuming only 15.5 mW - extends battery life beyond 8 hours per charge. |
| Data Acquisition Systems | Transducer Interface |
|
Use Scenario: Modular DAQ cards for lab equipment requiring synchronized multi-channel sampling. IC Role / Device Role / Timing Role: Standalone 16-bit ADC with global CONVST and daisy-chain capability for precise inter-device timing alignment. Use Value: Supports deterministic 1-MSPS sampling across up to 8 cascaded units using shared SCLK and CS - eliminates FPGA-based timing logic. |
Use Scenario: Signal conditioning for strain gauges, RTDs, and pressure transducers in HVAC and factory automation. IC Role / Device Role / Timing Role: Precision ADC accepting ratiometric or buffered reference inputs; handles 0–5 V unipolar outputs directly. Use Value: ±0.5 mV max offset error at 3 V supply ensures <0.01% FSR error contribution - simplifies system-level calibration. |
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 |
|---|---|---|---|
| ADS8327IPWG4 | 500 kSPS max sampling rate; identical TSSOP-16 package and pinout; same INL/SNR specs at reduced speed. | Targeted at cost-sensitive, lower-bandwidth systems where 1-MSPS is unnecessary. | Select when system bandwidth ≤200 kHz and power budget allows 7.8 mA active current (vs. 6.1 mA for ADS8329IPWG4 at 1 MSPS). |
| ADS8329IRSAT | Same electrical specs and functionality; differs only in 4×4 mm QFN-16 (RSA) package with thermal pad. | Preferred for high-density PCBs requiring smaller footprint and improved thermal performance. | Choose for space-constrained designs needing better thermal dissipation (θJA = 47°C/W vs. 86°C/W for TSSOP). |
Compared with ADS8327IPWG4, the ADS8329IPWG4 delivers double the throughput with identical precision and power efficiency per sample; compared with ADS8329IRSAT, it trades thermal performance and size for easier hand-soldering and legacy board compatibility via TSSOP-16.
Availability
ADS8329IPWG4 is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, and data acquisition systems requiring stable component supply, long-term manufacturability, and guaranteed industrial-temperature operation.
Supply support for ADS8329IPWG4 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 IC design.
The ADS8329IPWG4 belongs to TI's low-power, high-speed SAR ADC family engineered for demanding industrial and medical applications where resolution, linearity, and power efficiency must coexist without compromise.
FAQ
What is the maximum sampling rate of the ADS8329IPWG4 under industrial temperature conditions?
The ADS8329IPWG4 achieves a guaranteed 1-MSPS sampling rate across its full operating temperature range of –40°C to +85°C when +VA is between 3 V and 5.5 V. At 2.7 V ≤ +VA < 3 V, the maximum rate drops to 900 kSPS due to internal clock limitations - both values are fully tested and specified in the SLAS516C datasheet revision July 2009.
Does the ADS8329IPWG4 require an external reference voltage, or can it operate with an internal reference?
The ADS8329IPWG4 requires an external reference voltage applied between REF+ and REF– pins; it does not include an internal reference. The device accepts VREF from 0.3 V up to +VA, supporting common standards such as 2.5 V or 5 V precision references. Reference input resistance is 40 kΩ, and PSRR exceeds 78 dB to ensure stability against supply noise.
Can the ADS8329IPWG4 be used in daisy-chain configurations with other ADCs, and what pins are involved?
Yes, the ADS8329IPWG4 supports hardware daisy-chaining via its EOC/INT/CDI pin (Pin 4) and SDO output (Pin 7). In chain mode, the CDI function accepts serial data from the previous device's SDO, enabling synchronous readout of multiple ADS8329IPWG4 units using a single SCLK and CS line - eliminating the need for individual chip selects.
What power-down modes does the ADS8329IPWG4 support, and how do they differ in current consumption?
The ADS8329IPWG4 offers three power-down modes: Deep Power-Down (4–50 nA), Nap Power-Down (0.25–0.5 mA), and Auto Nap Power-Down (same current as Nap, but entered automatically post-conversion). These modes are controlled via SPI commands or hardware pins, allowing dynamic power scaling based on system activity - critical for battery-operated DAQ systems.
Is the ADS8329IPWG4 pin-compatible with the ADS8330IPWG4, and what are the functional differences?
No, the ADS8329IPWG4 is not pin-compatible with the ADS8330IPWG4. While both share the same TSSOP-16 package and many signal pins, ADS8330 replaces –IN (Pin 14) with COM and adds +IN0/+IN1 (Pins 13/12) to support dual-channel multiplexed input. ADS8329IPWG4 is single-ended only; substituting it for ADS8330IPWG4 would require PCB redesign and firmware changes to handle channel selection.
ADS8329IPWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
ADS8329IPWG4 FAQ
1.How can I place an order for ADS8329IPWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8329IPWG4 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 ADS8329IPWG4 reliable?
The price and inventory of ADS8329IPWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8329IPWG4 is usually 5 days.
3.What payment methods are accepted for ADS8329IPWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8329IPWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8329IPWG4?
ADS8329IPWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8329IPWG4 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 ADS8329IPWG4?
For technical support, including ADS8329IPWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8329IPWG4 requirements.
6.How does Aetrix verify that ADS8329IPWG4 is sourced from the original manufacturer or authorized distributors?
All ADS8329IPWG4 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 ADS8329IPWG4 meets industry standards.
7.What is the process for return or replacement of ADS8329IPWG4?
All ADS8329IPWG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS8329IPWG4, 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 ADS8329IPWG4 part is unused and in its original packaging.
Return procedure for ADS8329IPWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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