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Texas Instruments ADS8329IPWR
- Part No.:
- ADS8329IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS8329IPWR.pdf
- Description:
- IC ADC 16BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,831
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Product details
Overview
ADS8329IPWR 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 industrial-grade operation (–40°C to +85°C). It delivers ±1.75 LSB max INL, 93 dB SNR at 10 kHz, 15.5 mW power at 3 V supply, and supports daisy-chain mode for multi-ADC systems in precision data acquisition.
For engineers reviewing the ADS8329IPWR datasheet, ADS8329IPWR pinout, ADS8329IPWR application, or ADS8329IPWR equivalent, key selection considerations include unipolar input range (0 V to VREF), dual-supply flexibility (+VA = 2.7–5.5 V, +VBD = 1.65–5.5 V), programmable EOC/INT polarity, deep power-down mode (4 nA), and TSSOP-16 package compatibility with space-constrained industrial sensor interfaces.
Technical Context
The ADS8329IPWR implements a capacitor-based SAR architecture with inherent sample-and-hold, using an internal 22.9 MHz conversion clock (CCLK) derived from SCLK. It operates in manual or auto trigger modes, with 18-cycle conversion time and 3-cycle acquisition window - enabling deterministic timing control for synchronized sampling across multiple devices in chain mode.
Its digital interface supports both SPI and TMS320 DSP protocols via FS/CS and SCLK, with configurable status output (EOC/INT/CDI) and TAG bit capability. The device features separate analog (AGND) and interface (BDGND) grounds, isolated reference inputs (REF+, REF−), and CMOS-level I/O compatible with 1.65–5.5 V buffer supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit SAR with no missing codes - guarantees monotonicity and full code coverage over temperature. |
| Sampling Rate | 1 MSPS at +VA ≥ 3 V; 900 kSPS at +VA = 2.7 V - enables high-speed acquisition without external clock dependency. |
| INL / DNL | ±1.75 LSB max INL, ±1 LSB max DNL (ADS8329I grade) - ensures accurate linearity for precision transducer signal conditioning. |
| SNR / THD | 93 dB SNR, –102 dB THD at 10 kHz - supports high-fidelity measurement of low-distortion analog waveforms. |
| Power Dissipation | 15.5 mW at 1 MSPS, +VA = 3 V, +VBD = 1.8 V - suitable for battery-powered or thermally constrained industrial nodes. |
| Supply Ranges | +VA = 2.7–5.5 V; +VBD = 1.65–5.5 V - allows independent optimization of analog and digital domain power efficiency. |
| Operating Temp | –40°C to +85°C - fully specified for industrial process control and embedded instrumentation environments. |
Pinout & Package
TSSOP-16 package (PW designator), 5.0 mm × 4.4 mm body, 0.65 mm pitch, exposed thermal pad internally connected to substrate (recommended to connect to AGND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+VA) | Analog supply input | Primary analog rail (2.7–5.5 V); powers SAR core, reference buffer, and input stage. |
| 3 (CONVST) | Conversion start input | Edge-triggered command to freeze sample-and-hold and initiate conversion - independent of CS. |
| 4 (EOC/INT/CDI) | Status/data chain input/output | Programmable active-low EOC or INT; serves as CDI in daisy-chain mode for cascaded readout. |
| 5 (FS/CS) | Frame sync / chip select | Slave-select for SPI; also functions as frame sync for TI DSP interfaces. |
| 6 (SDI) | Serial data input | Accepts configuration commands (e.g., reset, polarity setup) and channel select bits in ADS8330 mode. |
| 7 (SDO) | Serial data output | 16-bit straight-binary result MSB-first; tri-state controlled by CS/FS edge timing. |
| 9 (SCLK) | Serial clock input | Up to 50 MHz clock for I/O; doubles as conversion clock when configured for internal CCLK derivation. |
| 13 (+IN) | Noninverting analog input | Single-ended unipolar input referenced to AGND; full-scale range = 0 V to VREF. |
| 14 (–IN) | Inverting analog input | Typically tied to AGND; defines differential input common-mode point for pseudo-differential use. |
| 15 (AGND) | Analog ground | Reference return for analog circuitry; must be separated from BDGND to minimize noise coupling. |
| 16 (REF+) | External reference positive | Accepts 0.3–5.5 V external reference; internal 40 kΩ input resistance enables direct connection to precision refs. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in conversion clock (CCLK) | Eliminates need for external clock source; internal 22.9 MHz oscillator simplifies system timing and reduces BOM count. |
| Multi-chip daisy chain mode | Enables synchronous sampling and serial readout of up to N devices using single SCLK/SDO/SDI lines - reduces PCB routing complexity. |
| Three power-down states | Deep power-down (4 nA), Nap (0.5 mA), and Auto-Nap modes allow dynamic power scaling based on acquisition duty cycle. |
| Programmable EOC/INT polarity | Configurable active-high/low status output supports flexible interrupt handling in microcontroller-based data loggers. |
| Global CONVST with CS independence | Allows simultaneous sampling across multiple ADS8329IPWR devices even when CS is asserted individually - critical for phase-aligned measurements. |
Applications
| Industrial Process Monitoring | Medical Sensor Signal Conditioning |
|---|---|
Use Scenario: Continuous monitoring of pressure, temperature, and flow sensors in PLC-based control cabinets with 4–20 mA loop integration. IC Role / Device Role / Timing Role: Primary ADC capturing slow-varying analog signals at 10–100 Hz with high DC accuracy and low drift. Use Value: ±0.5 mV max offset error at 3 V and ±1.75 LSB INL ensure <0.01% FSR measurement fidelity over –40°C to +85°C. |
Use Scenario: Front-end digitization of ECG, EEG, or pulse oximetry analog outputs in portable diagnostic equipment. IC Role / Device Role / Timing Role: High-SNR, low-noise ADC interfacing with low-output-impedance instrumentation amplifiers. Use Value: 93 dB SNR and –102 dB THD at 10 kHz preserve waveform integrity for clinical-grade signal analysis. |
| Magnetometer Data Acquisition | Automated Test Equipment (ATE) |
Use Scenario: Digitizing low-amplitude magnetic field outputs from fluxgate or Hall-effect sensors in navigation systems. IC Role / Device Role / Timing Role: Precision unipolar ADC with 16-bit resolution and excellent CMRR (70 dB) rejecting supply-induced interference. Use Value: 33 µV RMS noise floor and 70 dB CMRR enable sub-microtesla resolution in noisy vehicular or industrial EM environments. |
Use Scenario: Embedded digitizer module in benchtop ATE for component parametric testing requiring repeatable 16-bit accuracy. IC Role / Device Role / Timing Role: High-throughput ADC with deterministic 18-CCLK conversion and programmable trigger timing. Use Value: 1 MSPS throughput with manual/auto trigger modes and global CONVST support synchronized multi-channel test sequencing. |
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 |
|---|---|---|---|
| ADS8327IPWR | 500 kSPS max, same TSSOP-16 package and pinout; lower power (7.8 mW at 500 kSPS) but half the speed. | Suitable for cost-sensitive, lower-bandwidth systems where 1 MSPS is unnecessary. | Select ADS8327IPWR only if throughput ≤500 kSPS suffices and power budget is tighter than performance requirements. |
| ADS8329IRSAR | Same electrical specs and functionality, but in 4×4 mm QFN-16 (RSA) package with exposed thermal pad. | Better thermal performance and smaller footprint; requires different PCB layout and reflow profile. | Choose ADS8329IRSAR for space-constrained or thermally demanding designs where TSSOP-16 layout is impractical. |
Compared with ADS8327IPWR, the ADS8329IPWR provides double the sampling rate at modest power increase; compared with ADS8329IRSAR, it trades thermal efficiency and size for through-hole assembly compatibility and simplified layout in legacy industrial PCBs.
Availability
ADS8329IPWR is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, magnetometer interfaces, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for ADS8329IPWR 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 ADS8329IPWR belongs to TI's low-power, high-speed SAR ADC family targeting precision measurement in harsh environments; it was engineered for applications demanding 16-bit accuracy, robust noise immunity, and flexible digital interfacing without external clocks.
FAQ
What is the maximum sampling rate of the ADS8329IPWR under 3-V analog supply conditions?
The ADS8329IPWR achieves 1 MSPS maximum sampling rate when +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 - verified per TI SLAS516C Rev J electrical characteristics tables for both voltage ranges.
Does the ADS8329IPWR require an external reference voltage, or does it include an internal reference?
The ADS8329IPWR requires an external reference voltage applied to REF+ and REF− pins; it has no internal reference. The device accepts 0.3 V to +VA at REF+, with typical use cases employing 2.5 V or 5 V precision references - confirmed by absolute maximum ratings and reference input range specifications in the datasheet.
Can the ADS8329IPWR operate in daisy-chain mode with other identical devices, and what pins are involved?
Yes, the ADS8329IPWR supports multi-chip daisy chain mode using EOC/INT/CDI as chain data input and SDO as chain data output. This enables serial readout of N devices with shared SCLK and FS/CS - explicitly documented in the "Multi-Chip Daisy Chain Mode" feature list and timing diagrams of the ADS8329IPWR datasheet.
What are the power-down current levels for the ADS8329IPWR, and how are they activated?
The ADS8329IPWR offers three power-down states: Deep power-down draws 4 nA, Nap mode draws 0.5 mA, and Auto-Nap activates automatically between conversions. These are controlled via SPI register writes - detailed in the "Comprehensive Power-Down Modes" section and confirmed by electrical characteristics tables showing current vs. mode.
Is the ADS8329IPWR pin-compatible with the ADS8330IPWR, and what are the functional differences?
No, the ADS8329IPWR is not pin-compatible with ADS8330IPWR: ADS8329 has single-ended +IN/–IN inputs (pins 13/14), while ADS8330 uses +IN0/+IN1/COM (pins 13/12/14). Both share TSSOP-16 packaging but differ in terminal mapping - confirmed by separate pin function tables and package drawings in the ADS8329/ADS8330 datasheet.
ADS8329IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -
ADS8329IPWR FAQ
1.How can I place an order for ADS8329IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8329IPWR 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 ADS8329IPWR reliable?
The price and inventory of ADS8329IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8329IPWR is usually 5 days.
3.What payment methods are accepted for ADS8329IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8329IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8329IPWR?
ADS8329IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8329IPWR 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 ADS8329IPWR?
For technical support, including ADS8329IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8329IPWR requirements.
6.How does Aetrix verify that ADS8329IPWR is sourced from the original manufacturer or authorized distributors?
All ADS8329IPWR 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 ADS8329IPWR meets industry standards.
7.What is the process for return or replacement of ADS8329IPWR?
All ADS8329IPWR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8329IPWR, 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 ADS8329IPWR part is unused and in its original packaging.
Return procedure for ADS8329IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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