My Inquiry
My Account
Texas Instruments ADS8329IBRSAR
- Part No.:
- ADS8329IBRSAR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ADS8329IBRSAR.pdf
- Description:
- IC ADC 16BIT SAR 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,290
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS8329IBRSAR from Texas Instruments is a low-power, 16-bit, 1-MSPS unipolar-input SAR analog-to-digital converter with built-in conversion clock, serial SPI/DSP 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, and supports daisy-chain mode for multi-ADC systems in precision data acquisition.
For engineers reviewing the ADS8329IBRSAR datasheet, ADS8329IBRSAR pinout, ADS8329IBRSAR application, or ADS8329IBRSAR equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases in transducer and medical instrumentation, and validated alternative options for system-level design continuity.
Technical Context
The ADS8329IBRSAR implements a capacitor-based SAR architecture with inherent sample-and-hold, enabling single-ended unipolar input (0 V to VREF) without external front-end buffering. Its internal 22.3–23.5 MHz conversion clock eliminates need for external timing sources while supporting up to 42 MHz SCLK for high-speed serial readout.
It features programmable EOC/INT polarity, global CONVST independent of CS, auto/manual nap power-down modes (down to 2 nA), and full compatibility with TMS320 DSP and SPI protocols - all within a 4 × 4 mm QFN-16 package with thermally isolated substrate pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full-scale fidelity in high-precision measurement. |
| Sampling Rate | 1 MSPS at +VA = 3–5.5 V - enables real-time capture of fast transients in industrial control loops. |
| INL | ±1.75 LSB max (ADS8329IB grade) - ensures ≤0.0027% full-scale linearity error over temperature. |
| SNR | 93 dB at fIN = 10 kHz - supports >15-bit effective resolution for low-noise sensor digitization. |
| Power Dissipation | 15.5 mW at 1 MSPS, +VA = 3 V, +VBD = 1.8 V - suitable for battery-powered portable instrumentation. |
| Supply Range | +VA: 2.7–5.5 V; +VBD: 1.65–5.5 V - allows flexible dual-rail I/O interfacing with 1.8 V or 3.3 V microcontrollers. |
| Operating Temp | –40°C to +85°C - qualified for deployment in harsh industrial and automotive under-hood environments. |
Pinout & Package
ADS8329IBRSAR 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 planes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF+) | Reference input | Accepts external voltage reference (0.3–5.5 V); determines full-scale range (0 V to VREF) for unipolar conversion. |
| 2 (NC) | No connection | Internally unconnected; must be left floating or tied to AGND per layout guidelines. |
| 3 (CONVST) | Conversion start | Edge-triggered input that freezes sample-and-hold and initiates conversion on next internal clock edge. |
| 4 (EOC/INT/CDI) | Status/data chain | Configurable as end-of-conversion flag, interrupt output, or daisy-chain data input in multi-device configurations. |
| 5 (FS/CS) | Frame sync / chip select | Active-low SPI slave select or TMS320 frame sync; controls serial interface enable and timing alignment. |
| 6 (SDI) | Serial data input | Accepts configuration commands (e.g., reset, polarity setup) and supports software-initiated conversion triggers. |
| 7 (SDO) | Serial data output | 3-state output delivering 16-bit straight-binary result MSB-first; supports daisy-chain readout. |
| 8 (BDGND) | Digital interface ground | Separate ground return for +VBD supply; isolation from AGND minimizes digital noise coupling into analog path. |
| 9 (SCLK) | Serial clock | Accepts up to 42 MHz clock for SPI/DSP interface; doubles as conversion clock when configured externally. |
| 10 (+VBD) | Digital I/O supply | Independent 1.65–5.5 V rail powers digital interface; enables level-shifting between analog and controller domains. |
| 11 (+VA) | Analog supply | 2.7–5.5 V analog core supply; directly impacts sampling rate, noise, and power consumption. |
| 12 (RESERVED) | Internal function | Must be connected to AGND or +VA per datasheet; not user-accessible for signal routing. |
| 13 (+IN) | Analog input | Noninverting input for single-ended unipolar signals; full-scale range defined by REF+ and REF–. |
| 14 (–IN) | Analog reference | Inverting input, typically tied to AGND; establishes common-mode baseline for differential input rejection. |
| 15 (AGND) | Analog ground | Primary analog reference plane; requires low-impedance connection to REF– and thermal pad if grounded. |
| 16 (REF–) | Reference return | Low-impedance connection point for REF–; must be routed to AGND via dedicated via to minimize noise. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in conversion clock (CCLK) | Eliminates external oscillator requirement; internal 22.3–23.5 MHz clock enables deterministic 1-MSPS throughput without timing jitter from external sources. |
| Programmable EOC/INT polarity | Allows synchronization with host processor interrupt logic regardless of active-high/low signaling convention - reduces firmware adaptation effort. |
| Multi-chip daisy chain mode | Enables cascaded readout of multiple ADS8329 devices using single SCLK/SDI/SDO lines - cuts PCB routing complexity and GPIO usage in multi-channel systems. |
| Deep power-down mode (2 nA) | Reduces standby current by >6 orders of magnitude versus active mode - extends battery life in portable data loggers between measurement cycles. |
| Global CONVST independent of CS | Allows simultaneous sampling across multiple converters even when individual CS lines are asserted at different times - critical for phase-coherent multi-sensor acquisition. |
Applications
| Transducer Interface | Medical Instrumentation |
|---|---|
Use Scenario: Digitizing low-level outputs from strain gauges, RTDs, and piezoelectric sensors in industrial weighing and pressure monitoring systems. IC Role / Device Role / Timing Role: Precision ADC with 16-bit resolution and 93 dB SNR performs direct sensor signal digitization without gain amplification. Use Value: ±1.75 LSB INL and 33 µV RMS noise ensure sub-0.01% measurement accuracy over full industrial temperature range. | Use Scenario: High-fidelity acquisition of ECG, EEG, and bioimpedance waveforms in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-power SAR ADC captures physiological signals at ≥1 kSPS with minimal thermal load and battery drain. Use Value: 15.5 mW at 1 MSPS and deep power-down mode (2 nA) enable >24-hour continuous operation on coin-cell batteries. |
| Magnetometer Systems | Industrial Process Control |
Use Scenario: Reading Hall-effect or fluxgate magnetometer outputs for position sensing and current monitoring in motor drives. IC Role / Device Role / Timing Role: Unipolar-input ADC interfaces directly to conditioned magnetometer voltage outputs referenced to AGND. Use Value: 100 ns overvoltage recovery and 70 dB CMRR suppress switching noise from nearby power electronics. | Use Scenario: Closed-loop feedback acquisition in PLC analog I/O modules measuring 4–20 mA transmitter outputs via precision shunt resistors. IC Role / Device Role / Timing Role: High-speed, low-drift ADC digitizes shunt voltage with minimal offset drift (<0.8 ppm/°C) across ambient temperature swings. Use Value: ±0.5 mV max offset error at 3 V and <0.5 LSB DNL ensure repeatability in safety-critical control decisions. |
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 core, higher-grade INL (±2.5 LSB max) and offset error (±0.8 mV), rated for same temperature range. | Suitable where tighter absolute accuracy is required, e.g., calibration equipment or metrology-grade instruments. | Select ADS8329IRSAR when system-level INL budget demands <±2 LSB; ADS8329IBRSAR remains optimal for cost-sensitive industrial DAQ. |
| ADS8330IBRSAR | Dual-channel variant with 2:1 MUX and programmable TAG bit; identical performance specs and pinout except for +IN0/+IN1/COM instead of +IN/–IN. | Required for time-multiplexed dual-sensor acquisition (e.g., temperature + pressure) without external analog switches. | Choose ADS8330IBRSAR only when dual-input capability is mandatory; ADS8329IBRSAR offers lower channel count cost and simpler layout. |
Compared with ADS8329IRSAR, the ADS8329IBRSAR trades 0.75 LSB INL tolerance for lower unit cost and reduced calibration overhead; compared with ADS8330IBRSAR, it avoids MUX-related crosstalk and timing complexity while delivering identical single-channel performance in space-constrained designs.
Availability
ADS8329IBRSAR is available at Aetrix Electronics and suitable for industrial process control, portable medical instrumentation, and transducer interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS8329IBRSAR 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 ADS8329IBRSAR belongs to TI's low-power, high-speed SAR ADC family engineered for precision measurement in resource-constrained environments - emphasizing accuracy, power efficiency, and robust serial interfacing for industrial and medical systems.
FAQ
What is the maximum sampling rate of the ADS8329IBRSAR and under what supply conditions?
The ADS8329IBRSAR achieves a maximum sampling rate of 1 MSPS when the analog supply +VA is between 3 V and 5.5 V. At +VA = 2.7–3 V, the maximum rate drops to 900 kSPS due to internal clock limitations. This behavior is specified in the Electrical Characteristics table and confirmed across both 5 V and 3 V test conditions in the datasheet.
Does the ADS8329IBRSAR require an external reference voltage, and what are its valid input ranges?
Yes, the ADS8329IBRSAR requires an external reference applied between REF+ and REF– pins. Valid reference range is 0.3 V to +VA, with typical values of 2.5 V (at +VA = 3 V) or 5 V (at +VA = 5 V). REF– must be connected to AGND through a dedicated via to maintain PSRR and noise immunity, as explicitly stated in the Terminal Functions table.
How does the power-down functionality work on the ADS8329IBRSAR, and what are the current draw levels?
The ADS8329IBRSAR supports three power-down states: Nap (0.25–0.4 mA), Auto-Nap (same), and Deep Power-Down (2–50 nA). These modes are controlled via serial command or hardware pin configuration. Deep power-down reduces current by six orders of magnitude versus active operation, enabling ultra-low-quiescent energy use in intermittent-sampling applications like wireless sensor nodes.
Can the ADS8329IBRSAR be used in daisy-chain configurations, and what pins enable this?
Yes, the ADS8329IBRSAR supports multi-device daisy chaining using the EOC/INT/CDI pin as chain data input and SDO as chain data output. In chain mode, SCLK and SDI are shared across all devices, while each SDO connects to the next device's CDI. This configuration is fully documented in Figures 5–6 and the Terminal Functions table, requiring no additional glue logic.
What is the meaning of the 'IB' suffix in ADS8329IBRSAR, and how does it affect performance specifications?
The 'IB' suffix denotes the improved baseline grade of the ADS8329, specifying tighter performance limits: ±1.75 LSB max INL, ±1 LSB max DNL, and ±0.5 mV max offset error at 3 V. This grade is distinct from the standard 'I' grade (±2.5 LSB INL, ±0.8 mV offset) and is validated across the full –40°C to +85°C operating range per the Ordering Information table.
ADS8329IBRSAR 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:
- -
ADS8329IBRSAR FAQ
1.How can I place an order for ADS8329IBRSAR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8329IBRSAR 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 ADS8329IBRSAR reliable?
The price and inventory of ADS8329IBRSAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8329IBRSAR is usually 5 days.
3.What payment methods are accepted for ADS8329IBRSAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8329IBRSAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8329IBRSAR?
ADS8329IBRSAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8329IBRSAR 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 ADS8329IBRSAR?
For technical support, including ADS8329IBRSAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8329IBRSAR requirements.
6.How does Aetrix verify that ADS8329IBRSAR is sourced from the original manufacturer or authorized distributors?
All ADS8329IBRSAR 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 ADS8329IBRSAR meets industry standards.
7.What is the process for return or replacement of ADS8329IBRSAR?
All ADS8329IBRSAR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8329IBRSAR, 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 ADS8329IBRSAR part is unused and in its original packaging.
Return procedure for ADS8329IBRSAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS8329IBRSAR Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
