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Texas Instruments ADS8332IBPW
- Part No.:
- ADS8332IBPW
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS8332IBPW.pdf
- Description:
- IC ADC 16BIT SAR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,526
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Product details
Overview
ADS8332IBPW from Texas Instruments is a 16-bit, 500-kSPS, 8-channel unipolar-input successive approximation register (SAR) analog-to-digital converter with integrated 8:1 multiplexer, SPI/DSP-compatible serial interface, and daisy-chain capability. It operates from 2.7 V to 5.5 V analog supply and supports 1.65 V to VA digital I/O supply. Key confirmed specs include ±1.2 LSB typical INL (2.7 V), 91.5 dB SNR at 1 kHz (5 V), and 24-pin TSSOP package. It serves in high-precision industrial data acquisition systems requiring channel flexibility and low power.
For engineers reviewing the ADS8332IBPW datasheet, ADS8332IBPW pinout, ADS8332IBPW application, or ADS8332IBPW equivalent, this page delivers verified technical context, real-world design meaning for each specification, validated pin functions per TSSOP package, application-specific implementation insights, and two rigorously confirmed alternative parts - all grounded in TI's SBAS363E production datasheet (Rev E, Aug 2016).
Technical Context
The ADS8332IBPW implements a capacitor-based SAR architecture with inherent sample-and-hold, supporting both manual and auto-triggered conversion modes via CONVST or global CONVST. Its on-chip 8:1 mux allows selectable input routing to ADCIN, with MUXOUT enabling breakout for external signal conditioning.
It features three programmable power-down modes (Deep, Nap, Auto-NAP), configurable EOC/INT/CDI status pin polarity, and dual-clock operation: internal CCLK (10.9–12.6 MHz at 5 V) or external SCLK used for both interface and conversion timing. The device supports straight-binary output format and operates across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonicity and no missing codes over full temperature range, enabling precise measurement of small analog changes. |
| Sampling Rate | 500 kSPS - supports real-time capture of signals up to ~200 kHz Nyquist bandwidth in high-throughput industrial monitoring. |
| INL (Typ) | ±1.2 LSB at VA = 2.7 V - corresponds to <±19.1 µV error with 2.5 V reference, critical for calibrated sensor interfaces. |
| SNR | 91.5 dB at fIN = 1 kHz, VA = 5 V - enables >15-bit effective resolution for clean signal digitization in noise-sensitive applications. |
| Power Dissipation | 14.2 mW at 500 kSPS, VA = 2.7 V - allows battery-powered or thermally constrained designs without active cooling. |
| Reference Range | 1.2 V to 4.2 V - accommodates standard references (e.g., REF3240 at 4.096 V) while maintaining full 16-bit performance. |
| Digital Supply | VBD = 1.65 V to VA - supports interfacing with 1.8 V, 2.5 V, or 3.3 V microcontrollers without level shifters. |
Pinout & Package
ADS8332IBPW is packaged in a 24-pin TSSOP (PW) with 7.80 mm × 4.40 mm body size and exposed thermal pad connection to AGND. Pin functions are fully defined for ADS8332 (8-channel variant); IN[0:7] occupy pins 1–7 and 24, distinguishing it from ADS8331 (4-channel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN[0:7] | Multiplexer analog inputs | Eight unipolar input channels; selected via internal register control or hardware address lines in manual mode. |
| ADCIN | Converter analog input | Single-ended input node fed by mux output; requires low-impedance drive (<1 kΩ) for full AC performance. |
| COM | Common-mode reference | Typically tied to AGND; sets common-mode voltage for all IN[x] inputs and defines zero-scale point. |
| REF+, REF– | External reference terminals | Accept 1.2–4.2 V reference; REF– must connect to AGND through dedicated via to minimize ground bounce. |
| CONVST | Conversion start trigger | Edge-sensitive input freezing sample-and-hold; supports global triggering across multiple devices. |
| FS/CS | Frame sync / chip select | Active-low SPI frame delimiter; enables daisy-chain readout when multiple ADS8332 devices share SCLK/SDI. |
| SCLK, SDI, SDO | SPI serial interface | Supports up to 40 MHz SCLK (5 V); SDO is 3-state with CS-controlled enable for bus sharing. |
| EOC/INT/CDI | Status/data input | Configurable as end-of-conversion flag, interrupt, or daisy-chain data input - reduces GPIO count in multi-ADC systems. |
| VA, VBD | Analog/digital supplies | Separate rails allow independent optimization: VA powers core ADC, VBD powers digital interface (1.65–5.5 V). |
| AGND, DGND | Analog/digital grounds | Must be connected at single point near REF–; split-plane layout prevents digital noise coupling into ADC front-end. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 8:1 multiplexer with breakout | Enables single-ADC monitoring of eight sensors without external analog switches, reducing BOM and board area. |
| Auto-NAP powerdown mode | Reduces current to 3.2 mA at 250 kSPS (VA = 2.7 V), extending battery life in portable instrumentation. |
| Daisy-chain serial interface | Allows cascading of multiple ADS8332IBPW devices on one SPI bus, simplifying synchronization and firmware overhead. |
| Programmable EOC/INT polarity | Eliminates need for external inverters when matching host controller interrupt logic (active-high vs. active-low). |
| Global CONVST support | Permits simultaneous sampling across multiple converters - essential for phase-coherent multi-channel acquisition. |
Applications
| Industrial Process Control | Medical Instrumentation |
|---|---|
Use Scenario: Monitoring temperature, pressure, and flow sensors across distributed PLC I/O modules. IC Role / Device Role / Timing Role: 16-bit SAR ADC with 8-channel mux digitizes analog sensor outputs; CONVST synchronizes sampling across modules. Use Value: ±1.2 LSB INL ensures calibration stability over temperature, reducing field recalibration frequency in harsh environments. |
Use Scenario: High-fidelity acquisition of ECG, EEG, or bioimpedance signals in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-noise 16-bit ADC captures microvolt-level physiological waveforms; Auto-NAP extends battery runtime between charges. Use Value: 91.5 dB SNR at 1 kHz preserves signal integrity for accurate arrhythmia detection and spectral analysis. |
| Data Acquisition Systems | Automatic Test Equipment |
Use Scenario: Modular DAQ units acquiring multi-sensor data from vibration, strain, and environmental sensors. IC Role / Device Role / Timing Role: Daisy-chain capable ADC enables scalable channel expansion without additional SPI peripherals on host MCU. Use Value: 500 kSPS throughput supports oversampling for noise reduction and anti-aliasing filter relaxation. |
Use Scenario: Precision DC parametric testing of semiconductor devices using multi-point voltage/current measurements. IC Role / Device Role / Timing Role: Reference-grade ADC with 2.5 V or 4.096 V external reference provides traceable metrology-grade digitization. Use Value: 16-bit NMC over temperature eliminates gain/offset drift correction in production test firmware. |
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 |
|---|---|---|---|
| ADS8344IPW | 4-channel, 16-bit, 100 kSPS; no internal mux; lower power (3.5 mW), smaller 16-pin TSSOP. | Lower channel count and speed limit suitability to simpler sensor arrays or low-update-rate systems. | Select when fewer than 8 channels are needed and system throughput ≤100 kSPS; saves PCB space and cost. |
| ADS8688IPWR | 8-channel, 16-bit, 500 kSPS; integrated reference (4.096 V); higher supply range (up to 5.5 V); 32-pin TQFP. | Includes precision reference and higher drive capability but lacks daisy-chain and global CONVST features. | Choose when reference sourcing complexity must be minimized and board space allows larger package; not drop-in compatible. |
Compared with ADS8332IBPW, ADS8344IPW trades channel count and speed for compactness and ultra-low power, while ADS8688IPWR adds integrated reference at the expense of interface flexibility and pin compatibility - making ADS8332IBPW optimal for scalable, synchronized, reference-flexible 8-channel systems.
Availability
ADS8332IBPW is available at Aetrix Electronics and suitable for industrial process controls, medical instrumentation, and data acquisition systems requiring stable component supply, long-term manufacturability, and guaranteed industrial-temperature operation.
Supply support for ADS8332IBPW 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 ADS833x family was engineered for high-resolution, low-power, multi-channel data acquisition in space- and energy-constrained industrial and medical systems - emphasizing flexible supply operation, robust serial interfacing, and guaranteed 16-bit performance over temperature.
FAQ
What is the maximum SCLK frequency supported by ADS8332IBPW?
The ADS8332IBPW supports up to 40 MHz SCLK when VA = VBD = 5 V and SCLK is used only for I/O timing. When SCLK also serves as the conversion clock, the maximum is 21 MHz. These limits ensure reliable setup/hold timing for SDI and valid SDO output, as specified in Section 8.8 of the SBAS363E datasheet.
Does ADS8332IBPW require an external reference voltage?
Yes, ADS8332IBPW requires an external reference applied between REF+ and REF–. It accepts 1.2 V to 4.2 V, with optimal performance at 2.5 V (2.7 V supply) or 4.096 V (5 V supply). No internal reference is present - the device relies entirely on external precision sources like REF3240 for accuracy-critical applications.
How does the daisy-chain mode work on ADS8332IBPW?
In daisy-chain mode, multiple ADS8332IBPW devices connect SDO of one to SDI of the next, with shared SCLK and FS/CS. The EOC/INT/CDI pin of upstream devices acts as CDI for downstream ones. A single 32-bit SPI frame reads all devices' conversions sequentially, eliminating need for individual CS lines and simplifying firmware.
What is the purpose of the COM pin on ADS8332IBPW?
The COM pin on ADS8332IBPW establishes the common-mode reference for all eight analog inputs (IN[0:7]) and ADCIN. It is typically connected to AGND but may be biased to other voltages for pseudo-differential or offset-adjusted configurations. Proper decoupling and low-impedance routing are essential to maintain INL and crosstalk performance.
Can ADS8332IBPW operate with different analog and digital supply voltages?
Yes, ADS8332IBPW supports independent analog (VA = 2.7–5.5 V) and digital I/O (VBD = 1.65 V to VA) supplies. This allows direct interfacing with 1.8 V FPGAs or 3.3 V microcontrollers without level shifters, while optimizing ADC core performance via higher VA - a key advantage in mixed-voltage system designs.
ADS8332IBPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 8
- Input Type:
- Pseudo-Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V, 5V
- Voltage - Supply, Digital:
- 1.65V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8332IBPW FAQ
1.How can I place an order for ADS8332IBPW through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8332IBPW 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 ADS8332IBPW reliable?
The price and inventory of ADS8332IBPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8332IBPW is usually 5 days.
3.What payment methods are accepted for ADS8332IBPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8332IBPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8332IBPW?
ADS8332IBPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8332IBPW 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 ADS8332IBPW?
For technical support, including ADS8332IBPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8332IBPW requirements.
6.How does Aetrix verify that ADS8332IBPW is sourced from the original manufacturer or authorized distributors?
All ADS8332IBPW 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 ADS8332IBPW meets industry standards.
7.What is the process for return or replacement of ADS8332IBPW?
All ADS8332IBPW units undergo pre-shipment inspection (PSI). If there is an issue with ADS8332IBPW, 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 ADS8332IBPW part is unused and in its original packaging.
Return procedure for ADS8332IBPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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