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Texas Instruments ADS8330IPWR
- Part No.:
- ADS8330IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS8330IPWR.pdf
- Description:
- IC ADC 16BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,137
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Product details
Overview
ADS8330IPWR from Texas Instruments is a 16-bit, 1-MSPS dual-channel unipolar SAR analog-to-digital converter with integrated 2:1 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 systems.
For engineers reviewing the ADS8330IPWR datasheet, ADS8330IPWR pinout, ADS8330IPWR application, or ADS8330IPWR equivalent, key selection criteria include dual-channel auto/manual channel select mode, 16-bit NMC over temperature, built-in conversion clock (22.3 MHz typical), deep power-down capability (2 nA), and TSSOP-16 package compatibility with daisy-chain operation.
Technical Context
The ADS8330IPWR implements a capacitor-based SAR architecture with inherent sample-and-hold, supporting both manual and auto-triggered conversion modes. Its dual-input MUX (+IN0/+IN1) and COM terminal enable true differential or pseudo-differential input configurations with 101 dB channel isolation at 50 kHz.
It features a programmable EOC/INT/CDI output with polarity control, FS/CS for SPI frame sync or chip select, and supports chain-mode operation via CDI/SDO routing. The internal CCLK runs at 22.3 MHz (typ) when +VA = 3 V, enabling 1 MSPS throughput with 18-cycle conversion time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage across full temperature range. |
| Sampling Rate | 1 MSPS at +VA ≥ 3 V; 900 kSPS at +VA = 2.7 V - enables high-speed acquisition without external clock dependency. |
| INL | ±1.75 LSB max (IB grade) - ensures <0.003% full-scale linearity error for precision sensor interfacing. |
| SNR | 93 dB at fIN = 10 kHz - supports >15.2 ENOB for clean signal digitization in low-noise applications. |
| Power Dissipation | 15.5 mW at 1 MSPS, +VA = 3 V, +VBD = 1.8 V - enables battery-powered or thermally constrained designs. |
| Channel Isolation | 101 dB at 50 kHz - prevents crosstalk between +IN0 and +IN1 inputs during multiplexed sampling. |
| Aperture Jitter | 10 ps - limits sampling uncertainty to <0.02% of period at 1 MHz, preserving AC performance. |
Pinout & Package
TSSOP-16 package with exposed thermal pad (not electrically connected); pin 1 marked by dot; NC pins must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +VA | Analog supply input (2.7–5.5 V); powers SAR core and reference buffer - requires local 10 µF + 0.1 µF decoupling. |
| 2 | +IN1 | Second noninverting analog input; used with COM for dual-channel unipolar measurement. |
| 3 | +IN0 | First noninverting analog input; primary channel for auto/manual MUX selection. |
| 4 | COM | Common inverting input; typically tied to AGND for single-ended operation or used as reference for pseudo-differential mode. |
| 5 | AGND | Analog ground return; must be isolated from BDGND to minimize digital noise coupling into ADC core. |
| 6 | REF– | Negative reference input; connect directly to AGND via dedicated via to avoid ground bounce. |
| 7 | REF+ | Positive reference input; accepts 0.3–3 V (2.7 V ≤ +VA < 3 V) or 0.3–5.5 V (3 V ≤ +VA ≤ 5.5 V). |
| 8 | BDGND | Digital interface ground; separates I/O logic domain from analog domain to reduce switching noise. |
| 9 | CONVST | Conversion start trigger; edge-sensitive input that freezes S/H and initiates conversion on next internal clock edge. |
| 10 | EOC/INT/CDI | Multi-function output: end-of-conversion flag (active-low default), programmable interrupt, or chain-data input in daisy-chain mode. |
| 11 | FS/CS | Frame sync / chip select; active-low input controlling SPI transaction timing and device enable. |
| 12 | SDI | Serial data input; accepts configuration commands (e.g., channel select, TAG enable) and reset signals. |
| 13 | SDO | Serial data output; transmits 16-bit straight-binary result MSB-first with optional TAG bit prefix in dual-channel mode. |
| 14 | SCLK | Serial clock input; supports up to 42 MHz for I/O-only mode or 23.8 MHz when also driving internal CCLK. |
| 15 | +VBD | Buffer/digital I/O supply (1.65–5.5 V); sets logic thresholds for SDI/SDO/FS/CS and isolates digital noise from analog section. |
| 16 | NC | No internal connection - must be left floating or tied to AGND per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable TAG bit output | Appends channel identifier (0/1) to each 16-bit conversion result - eliminates external MUX control logic in dual-sensor systems. |
| Auto/Manual channel select mode | Hardware-selectable input sequencing - enables deterministic sampling order without host processor intervention. |
| Built-in conversion clock (CCLK) | 22.3 MHz typical internal oscillator - removes need for external clock source while maintaining 1 MSPS throughput. |
| Deep power-down mode | 2 nA quiescent current - extends battery life in intermittent-sampling applications such as portable instrumentation. |
| Daisy-chain capability | CDI input and SDO output support multi-device cascading - reduces SPI bus loading and simplifies synchronization in multi-channel systems. |
Applications
| Industrial Process Control | Medical Instrumentation |
|---|---|
Use Scenario: Monitoring pressure and temperature sensors in PLC-based control cabinets with 4–20 mA loop interfaces. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing two independent analog sensor outputs with simultaneous sampling capability and 16-bit resolution. Use Value: 101 dB channel isolation prevents cross-talk between pressure and temperature readings, ensuring independent calibration and fault detection. | Use Scenario: High-fidelity acquisition of ECG and respiration waveforms in portable patient monitors. IC Role / Device Role / Timing Role: Low-power, high-SNR ADC capturing biopotential signals at 1 MSPS with minimal thermal drift over operating temperature. Use Value: 93 dB SNR and ±1.75 LSB INL preserve diagnostic waveform fidelity, supporting accurate QRS complex detection and arrhythmia analysis. |
| Data Acquisition Systems | Transducer Interface |
Use Scenario: Modular DAQ modules acquiring vibration, strain, and acceleration data from MEMS sensors in predictive maintenance gateways. IC Role / Device Role / Timing Role: Precision SAR ADC with programmable EOC/INT output triggering DMA transfers to microcontroller memory. Use Value: Auto-NAP power-down mode reduces average current to <500 nA between samples, extending field-deployed unit battery life beyond 2 years. | Use Scenario: Interfacing load cells and RTDs in weigh scales and HVAC airflow sensors requiring ratiometric measurement. IC Role / Device Role / Timing Role: Unipolar ADC using external reference derived from excitation voltage to eliminate gain error sensitivity to supply variation. Use Value: ±0.5 mV max offset error at 3 V allows sub-10 ppm measurement accuracy without factory calibration in production units. |
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 |
|---|---|---|---|
| ADS8329IPWR | Single-channel version; identical core, timing, and power specs but lacks +IN1/COM MUX and TAG bit functionality. | Requires external MUX for dual-sensor systems; increases BOM count and PCB area. | Select when only one analog input is needed and cost-per-channel optimization is critical. |
| AD7682BCPZ-RL7 | 16-bit, 250 kSPS PulSAR ADC; SPI interface, no internal clock; higher INL (±2.5 LSB max) and lower SNR (92.5 dB). | Lower throughput and reduced AC performance limit use in dynamic signal capture. | Choose for ultra-low-power (<10 µA deep sleep) or space-constrained designs where 250 kSPS suffices. |
Compared with ADS8329IPWR, ADS8330IPWR adds dual-channel flexibility without sacrificing speed or power; versus AD7682BCPZ-RL7, it delivers 4× higher throughput and superior linearity at marginally higher quiescent current.
Availability
ADS8330IPWR is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, data acquisition systems, and transducer interface applications requiring stable component supply and long-term manufacturability.
Supply support for ADS8330IPWR 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, embedded processing, and connectivity technologies with over 50 years of innovation in precision data converters.
The ADS8330IPWR belongs to TI's low-power, high-speed SAR ADC family designed for precision measurement in resource-constrained industrial and medical systems where resolution, speed, and power efficiency are co-optimized.
FAQ
What is the maximum sampling rate achievable with ADS8330IPWR under 3-V analog supply?
The ADS8330IPWR achieves 1 MSPS maximum sampling rate when +VA is between 3 V and 3.6 V. At +VA = 2.7 V, the maximum rate drops to 900 kSPS due to internal clock frequency scaling. This behavior is specified in the Electrical Characteristics table for TA = –40°C to +85°C and is guaranteed across the industrial temperature range. The ADS8330IPWR maintains full 16-bit performance at both rates.
Does ADS8330IPWR support true differential input mode?
The ADS8330IPWR does not support true differential input mode. Its analog inputs (+IN0, +IN1, COM) are unipolar and intended for single-ended or pseudo-differential operation relative to COM. For true differential measurements, an external instrumentation amplifier must condition the signal before applying it to +IN0 or +IN1 with COM grounded. The ADS8330IPWR datasheet explicitly defines the input range as 0 V to VREF, confirming unipolar architecture.
How is channel selection implemented in ADS8330IPWR for dual-input operation?
Channel selection in ADS8330IPWR is implemented via programmable auto/manual mode controlled through the SDI interface. In auto mode, the device alternates between +IN0 and +IN1 on successive conversions; in manual mode, the selected channel is latched via SDI command. The TAG bit output indicates active channel (0 = +IN0, 1 = +IN1), enabling unambiguous identification without host polling. This logic is internal to the ADS8330IPWR and requires no external glue logic.
What is the purpose of the BDGND pin on ADS8330IPWR, and how should it be connected?
The BDGND pin on ADS8330IPWR serves as the reference ground for the digital I/O interface (+VBD domain), physically separating it from AGND to prevent digital switching noise from modulating the analog conversion. It must be connected to a clean, low-impedance ground plane distinct from AGND, with minimal shared trace length. TI recommends using separate ground pours joined only at a single point near the ADC's ground pins. Improper BDGND routing degrades PSRR and increases DNL errors in the ADS8330IPWR.
Can ADS8330IPWR operate without an external voltage reference?
No, the ADS8330IPWR requires an external voltage reference applied between REF+ and REF– pins. It has no internal reference. The reference voltage sets the full-scale input range (0 V to VREF), and VREF must be stable and low-noise to preserve 16-bit accuracy. Typical configurations use precision references like REF5025 or REF6025. Operating the ADS8330IPWR without a valid reference violates absolute maximum ratings and results in undefined conversion output.
ADS8330IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -
ADS8330IPWR FAQ
1.How can I place an order for ADS8330IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8330IPWR 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 ADS8330IPWR reliable?
The price and inventory of ADS8330IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8330IPWR is usually 5 days.
3.What payment methods are accepted for ADS8330IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8330IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8330IPWR?
ADS8330IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8330IPWR 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 ADS8330IPWR?
For technical support, including ADS8330IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8330IPWR requirements.
6.How does Aetrix verify that ADS8330IPWR is sourced from the original manufacturer or authorized distributors?
All ADS8330IPWR 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 ADS8330IPWR meets industry standards.
7.What is the process for return or replacement of ADS8330IPWR?
All ADS8330IPWR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8330IPWR, 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 ADS8330IPWR part is unused and in its original packaging.
Return procedure for ADS8330IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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