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Texas Instruments ADS8332IBPWR
- Part No.:
- ADS8332IBPWR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS8332IBPWR.pdf
- Description:
- IC ADC 16BIT SAR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,707
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Product details
Overview
ADS8332IBPWR 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-compatible serial interface, and daisy-chain capability. It operates from 2.7 V to 5.5 V analog supply, delivers ±1.2 LSB typical INL and 91.5 dB SNR at 1 kHz, and targets precision data acquisition in industrial sensor interfaces.
For engineers reviewing the ADS8332IBPWR datasheet, ADS8332IBPWR pinout, ADS8332IBPWR application, or ADS8332IBPWR equivalent, key selection criteria include its 8-channel mux architecture, 24-pin VQFN package, unipolar input range up to 4.096 V, deep power-down mode (80 nA), and support for global CONVST triggering across multiple devices.
Technical Context
The ADS8332IBPWR implements a capacitor-based SAR ADC core with inherent sample-and-hold, on-chip conversion clock (CCLK), and flexible trigger modes (manual/auto/global CONVST). Its 8:1 analog mux supports breakout routing to ADCIN and MUXOUT pins, enabling simultaneous channel monitoring and signal conditioning paths.
It features programmable EOC/INT polarity, three powerdown states (Nap, Deep, Auto-NAP), and dual-supply operation: VA (2.7–5.5 V) for analog circuitry and VBD (1.65–VA+0.2 V) for digital I/O. The SPI/DSP-compatible interface supports up to 40 MHz SCLK when VA = VBD = 5 V and enables daisy-chain configuration without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonic output and no missing codes over full industrial temperature range (–40°C to +85°C). |
| Sampling Rate | 500 kSPS - supports real-time capture of signals up to ~200 kHz Nyquist bandwidth with adequate oversampling headroom. |
| INL (Typical) | ±1.2 LSB at VA = 2.7 V - ensures <0.002% full-scale linearity error for high-accuracy transducer digitization. |
| SNR | 91.5 dB at fIN = 1 kHz, VA = 5 V - enables >15-bit effective resolution for low-noise sensor signal chains. |
| Power Consumption | 14.2 mW at 500 kSPS, VA = 2.7 V - allows battery-powered portable instrumentation with extended runtime. |
| Package | 24-pin VQFN (4 mm × 4 mm) - provides compact footprint and thermal pad for analog ground connection to minimize noise coupling. |
| Reference Input | 1.2 V to 4.096 V external reference - supports precision metrology-grade references like REF3240 (4.096 V, 4 ppm/°C). |
Pinout & Package
ADS8332IBPWR is housed in a 24-pin VQFN package (RGE) with 4.00 mm × 4.00 mm body size and exposed thermal pad connected to AGND. Pin numbering follows top-view orientation with pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN[0:7] | Analog multiplexer inputs | Eight unipolar analog inputs selectable via internal mux; IN0–IN7 mapped to pins 1–4 and 21–24 (VQFN). |
| ADCIN | Main ADC analog input | Primary conversion node accepting mux output or direct signal; requires low-impedance drive due to 45 pF input capacitance. |
| MUXOUT | Multiplexer output | Provides buffered access to selected channel before ADC sampling-enables inline filtering or signal conditioning. |
| CONVST | Conversion start trigger | Edge-sensitive input freezing sample-and-hold; supports global synchronization across multiple ADS8332 devices. |
| EOC/INT/CDI | Status/data control pin | Configurable as end-of-conversion flag, interrupt output, or daisy-chain data input-reduces inter-device wiring count. |
| SCLK, SDI, SDO, FS/CS | SPI-compatible serial interface | Full-duplex 4-wire interface supporting 40 MHz clock (at 5 V); FS/CS doubles as DSP frame sync for TMS320 compatibility. |
| REF+, REF− | External reference terminals | Differential reference input with 20 kΩ impedance; REF− must connect to AGND via dedicated via to avoid ground bounce. |
| VA, VBD | Separate analog/digital supplies | VA powers SAR core and mux (2.7–5.5 V); VBD powers digital I/O (1.65–VA+0.2 V)-enables mixed-voltage system integration. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 8:1 analog multiplexer | Reduces external signal routing complexity and PCB layer count for multi-sensor systems; supports breakout to MUXOUT for inline filtering. |
| Global CONVST synchronization | Enables simultaneous sampling across multiple ADS8332IBPWR devices without timing skew-critical for phase-coherent multi-channel acquisition. |
| Daisy-chain serial interface | Allows cascading of multiple converters using single SCLK/SDI/FS-CS lines-cuts host GPIO usage and simplifies firmware driver design. |
| Three powerdown modes | Auto-NAP (8.7 mW), Nap (390 µA), and Deep PD (80 nA) enable dynamic power scaling based on acquisition duty cycle and sleep requirements. |
| Programmable EOC/INT polarity | Permits hardware-level interrupt handling compatible with both active-high and active-low microcontroller input configurations-no external inverters needed. |
Applications
| Industrial Process Monitoring | Medical Sensor Interface |
|---|---|
|
Use Scenario: Continuous monitoring of 8 pressure, temperature, and flow sensors in PLC-based factory automation. IC Role / Device Role / Timing Role: 16-bit SAR ADC with integrated 8:1 mux performs synchronized sampling and serial streaming to ARM Cortex-M7 controller. Use Value: Eliminates external analog switches and reduces BOM cost by 30%; 91.5 dB SNR ensures accurate detection of sub-millivolt sensor drifts. |
Use Scenario: Digitizing outputs from ECG, EEG, and pulse oximetry front-ends in portable diagnostic equipment. IC Role / Device Role / Timing Role: Precision ADC capturing low-amplitude bio-signals with programmable gain stages and anti-aliasing filtering via MUXOUT path. Use Value: ±1.2 LSB INL and 2.5 V reference support meet IEC 60601-2-27 linearity requirements for Class II medical devices. |
| Automated Test Equipment | Magnetometer Data Acquisition |
|
Use Scenario: High-speed functional testing of mixed-signal ICs using multi-point voltage/current measurements across DUT pins. IC Role / Device Role / Timing Role: 500-kSPS sampling engine with global CONVST triggers coordinated across multiple ADS8332IBPWR units for parallel pin testing. Use Value: Daisy-chain mode reduces test head cabling by 60%; 40 MHz SCLK enables fast result readout and short test cycle times. |
Use Scenario: Reading fluxgate or AMR magnetometer arrays in geophysical survey tools requiring ultra-low noise and stable DC response. IC Role / Device Role / Timing Role: Low-drift 16-bit converter digitizing nano-volt-level magnetic field changes with 1 ppm/°C offset drift and 78 dB PSRR. Use Value: 80 nA deep powerdown extends battery life in field-deployed instruments; 125 dB crosstalk prevents inter-channel interference in dense sensor grids. |
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 |
|---|---|---|---|
| ADS8688IPWR | 16-bit, 500-kSPS, 8-channel, but includes integrated PGA (1–128×) and internal 4.096-V reference; larger 32-pin TQFP package. | Better suited for low-level sensor signals requiring programmable gain; eliminates external op-amp and reference components. | Select ADS8688IPWR when signal conditioning is required on-board; ADS8332IBPWR remains optimal for systems with external gain/reference or space-constrained layouts. |
| AD7606C-16BSTZ | 16-bit, 1-MSPS, 8-channel, bipolar input (±10 V), simultaneous sampling, but requires external reference and higher supply current (43 mW at 1 MSPS). | Supports true differential/bipolar inputs and real-time oversampling for anti-aliasing-ideal for motor control and power quality analyzers. | Choose AD7606C-16BSTZ for bipolar measurement or >500 kSPS throughput; ADS8332IBPWR offers lower power and simpler unipolar interface for portable instrumentation. |
Compared with ADS8688IPWR and AD7606C-16BSTZ, the ADS8332IBPWR provides the lowest power consumption in unipolar 8-channel applications, smallest VQFN footprint, and native daisy-chain capability-making it ideal for space- and energy-constrained embedded data loggers.
Availability
ADS8332IBPWR is available at Aetrix Electronics and suitable for industrial process controls, medical instrumentation, and automated test equipment requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for ADS8332IBPWR 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 signal chain solutions.
The ADS833x family was designed specifically for high-resolution, low-power, multi-channel data acquisition in harsh industrial environments-emphasizing robust ESD tolerance (±2000 V HBM), wide supply flexibility, and seamless integration with TI's C2000™ and Sitara™ processors.
FAQ
What is the maximum SCLK frequency supported by ADS8332IBPWR?
The ADS8332IBPWR supports up to 40 MHz SCLK when VA = VBD = 5 V and SCLK is used only for I/O operations. When SCLK also serves as the conversion clock, the maximum frequency drops to 21 MHz. At 2.7 V supply, the I/O-only limit is 25 MHz. These values are specified in the Electrical Characteristics tables and validated across the full –40°C to +85°C operating range.
Does ADS8332IBPWR require an external reference voltage?
Yes, the ADS8332IBPWR requires an external reference applied between REF+ and REF− pins. It accepts reference voltages from 1.2 V to 4.096 V (or up to VA), with optimal performance achieved using precision references such as the REF3240 (4.096 V, 4 ppm/°C). No internal reference is provided-the device relies entirely on this external source for full-scale accuracy.
How does the daisy-chain mode work on ADS8332IBPWR?
In daisy-chain mode, the SDO pin of one ADS8332IBPWR connects to the SDI pin of the next device, while all share common SCLK and FS/CS lines. The EOC/INT/CDI pin of downstream devices is configured as CDI to accept command bits. This configuration allows reading conversion results from multiple devices in sequence using a single SPI transaction-reducing host interface overhead and PCB routing complexity.
What power-saving modes are available on ADS8332IBPWR?
The ADS8332IBPWR offers three configurable powerdown modes: Auto-NAP (8.7 mW at 250 kSPS), Nap (390 µA), and Deep PD (80 nA). Entry into Nap and Deep modes is controlled via SPI command or hardware RESET assertion. All modes retain register settings and allow fast wake-up (<1 µs for Nap, <10 µs for Deep), making them suitable for burst-mode sensing applications.
Can ADS8332IBPWR perform simultaneous sampling across all 8 channels?
No, the ADS8332IBPWR performs sequential sampling across its 8 input channels using an internal multiplexer-it does not support true simultaneous sampling. However, it enables tightly synchronized conversions via global CONVST triggering, where all devices in a system begin sampling at the exact same instant. For true simultaneous sampling, consider the AD7606C-16BSTZ or similar simultaneous-sampling ADCs.
ADS8332IBPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -
ADS8332IBPWR FAQ
1.How can I place an order for ADS8332IBPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8332IBPWR 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 ADS8332IBPWR reliable?
The price and inventory of ADS8332IBPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8332IBPWR is usually 5 days.
3.What payment methods are accepted for ADS8332IBPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8332IBPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8332IBPWR?
ADS8332IBPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8332IBPWR 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 ADS8332IBPWR?
For technical support, including ADS8332IBPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8332IBPWR requirements.
6.How does Aetrix verify that ADS8332IBPWR is sourced from the original manufacturer or authorized distributors?
All ADS8332IBPWR 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 ADS8332IBPWR meets industry standards.
7.What is the process for return or replacement of ADS8332IBPWR?
All ADS8332IBPWR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8332IBPWR, 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 ADS8332IBPWR part is unused and in its original packaging.
Return procedure for ADS8332IBPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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