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Texas Instruments ADS8330IPW
- Part No.:
- ADS8330IPW
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS8330IPW.pdf
- Description:
- IC ADC 16BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:167
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Product details
Overview
ADS8330IPW from Texas Instruments is a 16-bit, 1-MSPS dual-channel unipolar SAR analog-to-digital converter with integrated 2:1 input MUX, programmable TAG bit output, and SPI/DSP-compatible serial interface. It operates from 2.7 V to 5.5 V analog supply, delivers ±1.75 LSB max INL and 93 dB SNR at 10 kHz, and targets precision data acquisition in industrial process control and transducer interface systems.
For engineers reviewing the ADS8330IPW datasheet, ADS8330IPW pinout, ADS8330IPW application, or ADS8330IPW equivalent, key selection considerations include its dual single-ended input architecture, auto/manual channel select mode, EOC/INT/CDI multifunction pin behavior, and TSSOP-16 package compatibility with daisy-chain operation across multiple converters.
Technical Context
The ADS8330IPW implements a capacitor-based SAR ADC core with inherent sample-and-hold, supporting both manual (CONVST-triggered) and auto-triggered conversion modes. Its internal 22.3–24.5 MHz conversion clock enables 1-MHz throughput at +VA ≥ 3 V, with acquisition time fixed at 3 CCLK cycles and conversion time at 18 CCLK cycles.
It features dual analog inputs (+IN0 and +IN1) referenced to COM, programmable status polarity on EOC/INT/CDI, and configurable TAG bit output for channel identification in chain mode. The device supports SPI and TMS320 DSP serial protocols via FS/CS and SCLK, with SDO output synchronized to SCLK falling edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonic transfer function for precision measurement applications. |
| Sampling Rate | 1 MSPS at +VA = 3–5.5 V; 900 kSPS at +VA = 2.7–3 V - enables high-speed acquisition while maintaining low power at reduced supply. |
| INL | ±1.75 LSB max (ADS8330IB grade) - ensures <0.003% full-scale linearity error over temperature for calibrated sensor interfaces. |
| SNR | 93 dB at fIN = 10 kHz, VREF = 5 V - supports >15-bit effective resolution in narrowband signal conditioning. |
| Power Dissipation | 15.5 mW at 1 MSPS, +VA = 3 V, +VBD = 1.8 V - enables battery-powered or thermally constrained embedded DAQ designs. |
| Input Range | 0 V to VREF (unipolar) - simplifies signal conditioning for grounded-referenced sensors like RTDs and strain gauges. |
| Channel Isolation | 101 dB at 50 kHz - prevents crosstalk between +IN0 and +IN1 inputs during simultaneous sampling or multiplexed operation. |
Pinout & Package
TSSOP-16 package with exposed thermal pad internally connected to substrate; pad may be tied to AGND or left floating but must remain isolated from digital ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+VA) | Analog supply input | Accepts 2.7–5.5 V; powers SAR core, reference buffer, and analog front-end; requires local 1-µF decoupling. |
| 2 (+IN1) | Second analog input | Single-ended noninverting input for channel 1; referenced to COM; supports 0–VREF unipolar range. |
| 3 (+IN0) | First analog input | Single-ended noninverting input for channel 0; identical electrical specs to +IN1; used with auto/manual channel select. |
| 4 (EOC/INT/CDI) | Configurable status output | Programmable as end-of-conversion flag (EOC), interrupt (INT), or chain data input (CDI) in daisy-chain mode. |
| 5 (FS/CS) | Frame sync / chip select | Active-low SPI slave select or TMS320 frame sync; initiates serial readout and controls EOS timing window. |
| 6 (SDI) | Serial data input | Accepts configuration commands (e.g., reset, channel select, TAG enable); also supports software reset assertion. |
| 7 (SDO) | Serial data output | 3-state output delivering 16-bit straight-binary result MSB-first; timing aligned to SCLK falling edge. |
| 8 (BDGND) | Digital interface ground | Return path for +VBD supply; must be separated from AGND to minimize digital noise coupling into analog section. |
| 9 (CONVST) | Conversion start trigger | Edge-sensitive input freezing sample-and-hold and launching conversion on next internal clock rising edge. |
| 10 (+VBD) | Digital I/O supply | 1.65–5.5 V supply for SPI interface; independent of +VA to support mixed-voltage system interfacing. |
| 11 (AGND) | Analog ground | Primary return for analog circuitry; must be star-connected to minimize ground bounce in precision ADC layouts. |
| 12 (NC) | No internal connection | Unbonded pin; must be left unconnected or tied to AGND per layout best practices for thermal pad isolation. |
| 13 (REF+) | External reference positive | Accepts 0.3–5.5 V external reference voltage; determines full-scale range; requires low-impedance source ≤40 kΩ. |
| 14 (COM) | Common inverting input | Reference node for both +IN0 and +IN1; typically connected to AGND; defines unipolar input common-mode point. |
| 15 (REF−) | External reference negative | Must be connected to AGND via dedicated via; establishes reference ground reference separate from analog signal ground. |
| 16 (SCLK) | Serial clock input | Supports up to 50 MHz externally; drives both I/O and internal conversion clock when configured as master clock source. |
Key Features
| Feature | Design Value |
|---|---|
| Dual single-ended input MUX | Enables sequential sampling of two independent sensors without external multiplexer, reducing BOM count and PCB area. |
| Programmable TAG bit output | Appends channel identifier (0/1) to each 16-bit conversion result, eliminating software tracking overhead in dual-channel systems. |
| Auto/Manual channel select mode | Allows hardware-driven round-robin scanning (auto) or firmware-controlled channel selection (manual) via SDI command. |
| Built-in deep power-down mode | Reduces supply current to 4–50 nA, enabling ultra-low-power sleep states in portable or energy-harvesting DAQ nodes. |
| Multi-chip daisy chain capability | Permits cascading of multiple ADS8330IPW devices on shared SCLK/SDI/FS lines, minimizing GPIO usage in dense sensor arrays. |
Applications
| Industrial Process Control | Transducer Interface |
|---|---|
Use Scenario: Monitoring pressure, flow, and temperature signals from 4–20 mA loop transmitters in PLC analog input modules. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing two independent transducer outputs simultaneously with 16-bit resolution and <100 ns aperture jitter. Use Value: Enables direct replacement of legacy 12-bit converters while preserving existing signal conditioning and isolation stages. | Use Scenario: Digitizing outputs from load cells, strain gauges, and RTDs in test equipment requiring ratiometric measurement against stable reference. IC Role / Device Role / Timing Role: Unipolar SAR ADC accepting 0–2.5 V or 0–5 V inputs referenced to COM, with built-in sample-and-hold and programmable gain error compensation. Use Value: Eliminates need for external instrumentation amplifiers in medium-precision bridge sensor applications. |
| Medical Instrumentation | Data Acquisition Systems |
Use Scenario: Capturing biopotential signals (ECG, EMG) in portable diagnostic devices where low power and small footprint are critical. IC Role / Device Role / Timing Role: Low-noise 16-bit ADC operating from 3-V supply with 15.5 mW dissipation and 33 µV RMS noise floor. Use Value: Supports >8-hour battery life in handheld ECG recorders while maintaining clinical-grade signal fidelity. | Use Scenario: High-channel-count modular DAQ systems requiring synchronized sampling across multiple ADCs in rack-mounted chassis. IC Role / Device Role / Timing Role: Daisy-chainable ADC with global CONVST support and programmable EOC timing, enabling deterministic multi-device triggering. Use Value: Reduces FPGA resource usage by replacing individual CS lines with single-chain control and status propagation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8329IPW | Single-input variant; lacks +IN1, COM, and TAG functionality; otherwise identical core, timing, and power specs. | Suitable only for single-sensor systems; cannot replace ADS8330IPW in dual-channel configurations without redesign. | Select ADS8329IPW when only one analog input is required and board space or cost optimization is prioritized. |
| AD7682BCPZ | 16-bit, 250 kSPS, pseudo-differential input; uses SPI with busy indicator instead of EOC/INT; no built-in MUX or TAG bit. | Lower throughput and different input structure limit use in high-speed dual-sensor monitoring; requires external MUX for two inputs. | Choose AD7682BCPZ for lower-power, lower-cost applications where 250 kSPS suffices and differential input rejection is needed. |
Compared with ADS8329IPW and AD7682BCPZ, the ADS8330IPW uniquely combines dual single-ended inputs, hardware channel tagging, and 1-MSPS throughput in a TSSOP-16 package-making it optimal for compact, high-channel-density industrial DAQ where firmware overhead and PCB real estate are constrained.
Availability
ADS8330IPW is available at Aetrix Electronics and suitable for industrial process control, transducer interface, and medical instrumentation applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADS8330IPW 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 U.S.-based semiconductor company specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.
The ADS8330IPW belongs to TI's precision SAR ADC product line, designed specifically for high-resolution, low-power data acquisition in space- and power-constrained embedded systems with demanding linearity and noise requirements.
FAQ
What is the maximum sampling rate supported by the ADS8330IPW under 3-V analog supply conditions?
The ADS8330IPW achieves 1 MSPS 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. This behavior is specified in the Electrical Characteristics table for TA = –40°C to +85°C and is validated across production lots. The ADS8330IPW maintains full 16-bit performance and linearity specifications across both speed grades.
Does the ADS8330IPW require an external reference voltage, or does it include an internal reference?
The ADS8330IPW requires an external reference voltage applied between REF+ and REF– pins; it does not contain an internal reference. The device accepts VREF from 0.3 V to +VA, with recommended values of 2.5 V (at +VA = 3 V) or 5 V (at +VA = 5 V). Reference input impedance is 40 kΩ, and REF– must be connected directly to AGND via a dedicated via to ensure accurate ratiometric conversion. The ADS8330IPW does not support internal reference activation.
How does the programmable TAG bit function in the ADS8330IPW, and how is it enabled?
The TAG bit in the ADS8330IPW is a configurable output appended to each 16-bit conversion result, indicating which input channel (+IN0 or +IN1) was sampled. It is enabled via SDI command during configuration mode and appears as bit 16 (MSB+1) in the serial output stream. When TAG is active, the SDO format becomes 17 bits: TAG + 16-bit data. This eliminates software-based channel tracking and reduces host processor overhead in dual-sensor systems using the ADS8330IPW.
Can the ADS8330IPW operate in daisy-chain mode with other ADCs, and what pins are involved?
Yes, the ADS8330IPW supports daisy-chain mode using the EOC/INT/CDI pin as chain data input and SDO as chain data output. In this configuration, multiple ADS8330IPW devices share FS/CS, SCLK, and SDI lines, with SDO of one device connected to CDI of the next. The global CONVST signal ensures synchronized sampling across all chained devices. Daisy chaining reduces microcontroller GPIO usage and simplifies timing alignment in multi-channel ADS8330IPW systems.
What are the power-supply requirements for the ADS8330IPW, and how do they differ between analog and digital domains?
The ADS8330IPW requires two independent supplies: +VA (2.7–5.5 V) for the analog section and +VBD (1.65–5.5 V) for the digital I/O interface. +VA powers the SAR core, reference buffer, and input stage; +VBD powers the SPI logic and drivers. BDGND and AGND must be kept separate and joined at a single point to prevent digital switching noise from degrading analog performance. Power dissipation ranges from 15.5 mW at 1 MSPS (+VA = 3 V, +VBD = 1.8 V) to 48 mW at full 5-V operation.
ADS8330IPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 2
- 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:
- -
ADS8330IPW FAQ
1.How can I place an order for ADS8330IPW through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8330IPW 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 ADS8330IPW reliable?
The price and inventory of ADS8330IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8330IPW is usually 5 days.
3.What payment methods are accepted for ADS8330IPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8330IPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8330IPW?
ADS8330IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8330IPW 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 ADS8330IPW?
For technical support, including ADS8330IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8330IPW requirements.
6.How does Aetrix verify that ADS8330IPW is sourced from the original manufacturer or authorized distributors?
All ADS8330IPW 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 ADS8330IPW meets industry standards.
7.What is the process for return or replacement of ADS8330IPW?
All ADS8330IPW units undergo pre-shipment inspection (PSI). If there is an issue with ADS8330IPW, 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 ADS8330IPW part is unused and in its original packaging.
Return procedure for ADS8330IPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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