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Texas Instruments ADS8329IBRSAT
- Part No.:
- ADS8329IBRSAT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ADS8329IBRSAT.pdf
- Description:
- IC ADC 16BIT SAR 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:551
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Product details
Overview
ADS8329IBRSAT 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 daisy-chain capability. It delivers ±1.75 LSB max INL, 93 dB SNR at 10 kHz, and operates from 2.7 V to 5.5 V analog supply. It is used in high-precision industrial data acquisition systems requiring stable DC performance and low power.
For engineers reviewing the ADS8329IBRSAT datasheet, ADS8329IBRSAT pinout, ADS8329IBRSAT application, or ADS8329IBRSAT equivalent, this page provides verified technical context, package mapping, real-world use scenarios, and validated alternative options for precision analog signal digitization in embedded industrial and medical instrumentation.
Technical Context
The ADS8329IBRSAT implements a capacitor-based SAR architecture with inherent sample-and-hold, supporting both manual (CONVST-triggered) and auto-triggered conversion modes. Its internal 22.3–24.5 MHz conversion clock eliminates external timing components while enabling precise aperture control (5 ns delay, 10 ps jitter).
It features programmable EOC/INT polarity, global CONVST independent of CS, and multi-chip daisy-chain operation via CDI/SDO routing. The device uses straight-binary output format and supports 50 MHz SCLK when used as I/O clock only - critical for high-throughput serial interfacing in resource-constrained microcontroller systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonicity and 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 / DNL | ±1.75 LSB max / ±1 LSB max - ensures <0.003% full-scale linearity error for calibrated sensor interfaces. |
| SNR / THD | 93 dB / –102 dB at 10 kHz - supports high-fidelity digitization 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 designs. |
| Reference Input | 0.3 V to +VA, 40 kΩ input resistance - allows direct connection to precision external references (e.g., REF5025). |
| Operating Temp | –40°C to +85°C - fully specified for industrial-grade reliability without derating. |
Pinout & Package
ADS8329IBRSAT is housed in a 4 × 4 mm, 16-pin QFN package (RSA) with exposed thermal pad internally connected to substrate. The pad may be tied to AGND or left floating but must remain isolated from digital ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF+) | External reference input | Accepts 0.3 V to +VA; connects to precision voltage reference for full-scale scaling. |
| 2 (NC) | No internal connection | Must be left unconnected; no routing or grounding required. |
| 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 output / chain data input | Configurable as end-of-conversion flag, interrupt, 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 TMS320 DSP interface. |
| 6 (SDI) | Serial data input | Accepts configuration commands (e.g., reset, polarity setup) and supports software reset. |
| 7 (SDO) | Serial data output | 3-state output delivering 16-bit straight-binary result; supports daisy-chain readout. |
| 8 (BDGND) | Digital interface ground | Separate ground return for +VBD-supplied logic; must be isolated from AGND except at single point. |
| 9 (SCLK) | Serial clock input | Accepts up to 50 MHz; controls data transfer timing and optionally drives internal conversion clock. |
| 10 (+VBD) | Digital I/O supply | 1.65 V to 5.5 V - decouples logic voltage from analog rail for flexible MCU interfacing. |
| 11 (+VA) | Analog supply | 2.7 V to 5.5 V - powers SAR core, reference buffer, and analog front-end; defines dynamic range. |
| 12 (RESERVED) | Internal function | Connect to AGND or +VA per layout guidelines; not user-accessible for signal routing. |
| 13 (+IN) | Noninverting analog input | Single-ended unipolar input (0 V to VREF); accepts up to +VA + 0.2 V absolute max. |
| 14 (–IN) | Inverting analog input | Typically grounded; defines differential input range when used with +IN (0 V to VREF). |
| 15 (AGND) | Analog ground | Primary ground reference for analog circuitry; requires low-impedance connection to system AGND plane. |
| 16 (REF–) | Reference return | Must connect to AGND through dedicated via; avoids noise coupling into reference path. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in conversion clock (CCLK) | Eliminates need for external oscillator; reduces BOM count and layout complexity in space-constrained designs. |
| Programmable EOC/INT polarity | Enables direct compatibility with either active-high or active-low interrupt controllers without external logic. |
| Multi-chip daisy-chain mode | Allows synchronous sampling across multiple ADS8329IBRSAT devices using single SCLK/CS, reducing GPIO usage. |
| Deep/Nap power-down modes | Reduces current to 4–50 nA (deep) or 0.25–0.4 mA (nap), extending battery life in intermittent-sampling applications. |
| Global CONVST independent of CS | Permits simultaneous sampling across multiple converters even when individual CS lines are asserted separately. |
| Unipolar input range (0 V to VREF) | Simplifies sensor interface design for grounded-output transducers (e.g., RTDs, strain gauges, pressure sensors). |
Applications
| Industrial Process Monitoring | Medical Instrumentation |
|---|---|
|
Use Scenario: Continuous digitization of 4–20 mA loop outputs and thermocouple signals in PLC analog input modules. IC Role / Device Role / Timing Role: Primary ADC capturing sensor data at 1 MSPS with <±2 LSB INL for closed-loop control feedback. Use Value: Enables sub-0.01% measurement accuracy over –40°C to +85°C without calibration drift compensation. |
Use Scenario: High-resolution ECG and EEG front-end digitization in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-noise, low-power ADC acquiring bio-potential signals with 93 dB SNR and <33 µV RMS noise floor. Use Value: Supports clinical-grade signal fidelity while maintaining <16 mW power draw at 3 V supply for extended battery runtime. |
| Magnetometer Signal Conditioning | Automated Test Equipment (ATE) |
|
Use Scenario: Digitizing low-level magnetic field outputs from fluxgate or AMR sensors in navigation systems. IC Role / Device Role / Timing Role: Precision unipolar ADC with 16-bit resolution and ±0.5 mV offset error at 3 V for DC-coupled sensing. Use Value: Delivers stable zero-point accuracy essential for heading calculation without periodic nulling routines. |
Use Scenario: High-speed waveform capture in benchtop multimeters and parametric test systems. IC Role / Device Role / Timing Role: Fast 1-MSPS SAR ADC with 105 dB SFDR used for spectral analysis of stimulus-response signals. Use Value: Provides >100 dB spurious-free dynamic range needed to resolve harmonics in precision calibration verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8329IRSAT | Higher grade: ±2.5 LSB max INL vs. ±1.75 LSB; same package, speed, and interface. | Targeted at cost-sensitive industrial systems where ±0.004% linearity is acceptable. | Select ADS8329IRSAT if full-temperature INL spec can be relaxed and lower unit cost is prioritized. |
| ADS8330IBRSAT | Dual-channel 2:1 MUX with TAG bit output; identical DC/AC specs and pinout except COM/+IN0/+IN1 pins. | Required when multiplexing two independent analog inputs (e.g., dual-sensor monitoring) without external mux. | Choose ADS8330IBRSAT only if channel multiplexing is needed - otherwise ADS8329IBRSAT offers simpler layout and lower software overhead. |
Compared with ADS8329IRSAT, the ADS8329IBRSAT provides tighter INL for calibrated measurement systems; compared with ADS8330IBRSAT, it eliminates MUX-related timing skew and simplifies firmware by removing channel selection logic - making it optimal for single-input, high-accuracy applications.
Availability
ADS8329IBRSAT is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, and magnetometer signal conditioning requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADS8329IBRSAT 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 ADS8329IBRSAT belongs to TI's low-power, high-speed SAR ADC family designed for precision industrial, medical, and test equipment where DC accuracy, AC performance, and power efficiency are jointly critical.
FAQ
What is the maximum sampling rate of the ADS8329IBRSAT under 3-V analog supply conditions?
The ADS8329IBRSAT achieves 1 MSPS sampling rate when +VA is between 3 V and 3.6 V. At 2.7 V ≤ +VA < 3 V, the maximum throughput drops to 900 kSPS due to internal clock limitations. This behavior is explicitly specified in the Electrical Characteristics table for the IB-grade device and confirmed across both 5-V and 3-V test conditions in the datasheet.
Does the ADS8329IBRSAT require an external reference voltage source?
Yes, the ADS8329IBRSAT requires an external reference applied between REF+ and REF– pins. It does not include an internal reference. The reference voltage sets the full-scale input range (0 V to VREF), and the device supports VREF from 0.3 V up to +VA, with typical use cases employing 2.5 V or 5 V references such as the REF5025 or REF5050.
Can the ADS8329IBRSAT operate in daisy-chain mode with other ADCs?
Yes, the ADS8329IBRSAT supports multi-chip daisy-chain operation using its EOC/INT/CDI pin as chain data input and SDO as chain data output. In this mode, multiple ADS8329IBRSAT devices share one SCLK and FS/CS line, enabling synchronized conversions and serial readout of all results with minimal interface overhead.
What is the purpose of the RESERVED pin (Pin 12) on the ADS8329IBRSAT?
Pin 12 on the ADS8329IBRSAT is labeled RESERVED in the terminal functions table and must be connected to either AGND or +VA per TI's layout recommendations. It is not user-accessible for signal routing and serves an internal function related to die biasing or ESD protection - leaving it floating is not recommended.
How does the power dissipation of the ADS8329IBRSAT compare between 3-V and 5-V analog supply operation?
At 1 MSPS, the ADS8329IBRSAT dissipates 15.5 mW with +VA = 3 V and +VBD = 1.8 V, versus 44–48 mW with +VA = +VBD = 5 V. This near-3× reduction makes the 3-V operating point strongly preferred for portable or thermally sensitive applications, with no degradation in resolution or linearity performance.
ADS8329IBRSAT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- 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-QFN (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8329IBRSAT FAQ
1.How can I place an order for ADS8329IBRSAT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8329IBRSAT 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 ADS8329IBRSAT reliable?
The price and inventory of ADS8329IBRSAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8329IBRSAT is usually 5 days.
3.What payment methods are accepted for ADS8329IBRSAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8329IBRSAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8329IBRSAT?
ADS8329IBRSAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8329IBRSAT 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 ADS8329IBRSAT?
For technical support, including ADS8329IBRSAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8329IBRSAT requirements.
6.How does Aetrix verify that ADS8329IBRSAT is sourced from the original manufacturer or authorized distributors?
All ADS8329IBRSAT 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 ADS8329IBRSAT meets industry standards.
7.What is the process for return or replacement of ADS8329IBRSAT?
All ADS8329IBRSAT units undergo pre-shipment inspection (PSI). If there is an issue with ADS8329IBRSAT, 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 ADS8329IBRSAT part is unused and in its original packaging.
Return procedure for ADS8329IBRSAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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