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Texas Instruments ADS8330IRSAT
- Part No.:
- ADS8330IRSAT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ADS8330IRSAT.pdf
- Description:
- IC ADC 16BIT SAR 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:316
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Product details
Overview
ADS8330IRSAT 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 is used in high-precision industrial data acquisition systems requiring channel-selectable, low-power digitization.
For engineers reviewing the ADS8330IRSAT datasheet, ADS8330IRSAT pinout, ADS8330IRSAT application, or ADS8330IRSAT equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative options, and supply-chain support tailored for embedded instrumentation and sensor interface design.
Technical Context
The ADS8330IRSAT implements a capacitor-based SAR architecture with built-in sample-and-hold and an internal 22.3–24.5 MHz conversion clock (CCLK), enabling 1-MHz throughput at +VA ≥ 3 V. Its dual single-ended input structure (+IN0/+IN1 with shared COM) supports auto/manual channel selection and outputs a 16-bit straight-binary code with optional TAG bit for daisy-chain identification.
It features three power-down modes-Deep (50 nA), Nap (0.5 µA), and Auto-Nap-with global CONVST control independent of CS, and supports both SPI master-slave and TMS320 DSP frame-sync (FS/CS) protocols via configurable EOC/INT/CDI pin polarity and timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonic output with no missing codes across full temperature range. |
| Sampling Rate | 1 MSPS at +VA = 3–5.5 V - enables real-time capture of signals up to ~400 kHz Nyquist bandwidth. |
| INL | ±1.75 LSB max - ensures <0.003% full-scale linearity error for precision transducer digitization. |
| SNR | 93 dB at fIN = 10 kHz - supports >15-bit effective resolution in low-noise sensor front-ends. |
| Supply Range | +VA: 2.7–5.5 V; +VBD: 1.65–5.5 V - allows flexible dual-rail operation with 1.8-V I/O interfacing. |
| Power Dissipation | 15.5 mW at 1 MSPS, +VA = 3 V, +VBD = 1.8 V - suitable for battery-powered portable instrumentation. |
| Channel Isolation | 109 dB at 50 kHz - prevents crosstalk between +IN0 and +IN1 inputs during multiplexed sampling. |
Pinout & Package
ADS8330IRSAT is housed in a 4 × 4 mm, 16-pin QFN package (RSA) with exposed thermal pad internally connected to substrate. Pin 1 is REF+, top-left corner; pin 16 is REF−. The thermal pad may be connected to AGND or left floating but must remain isolated from BDGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF+ | External reference positive input | Accepts 0.3–3 V (low-V) or 0.3–5.5 V (high-V) reference; sets full-scale range as +INx – COM. |
| REF− | External reference negative input | Must connect to AGND via dedicated via; defines reference common for unipolar 0–VREF input range. |
| +IN0 / +IN1 | Dual analog input channels | Single-ended noninverting inputs; selected automatically or manually; share COM terminal. |
| COM | Common inverting input | Typically tied to AGND; serves as return for both +IN0 and +IN1 in unipolar mode. |
| CONVST | Conversion start trigger | Edge-sensitive input that freezes S/H and initiates conversion on next CCLK rising edge; global, CS-independent. |
| EOC/INT/CDI | Status/data chain control | Configurable as end-of-conversion flag, interrupt pulse, or daisy-chain data input in multi-device systems. |
| FS/CS | Frame sync / chip select | Active-low slave select for SPI; also serves as FS signal for TI DSP interfaces. |
| SCLK | Serial clock input | Supports up to 50 MHz externally; doubles as I/O clock and internal CCLK source when enabled. |
| SDI | Serial data input | Accepts configuration bits (e.g., channel select, TAG enable) and software reset command. |
| SDO | Serial data output | 3-state output delivering 16-bit result MSB-first; includes optional TAG bit in auto-channel mode. |
| +VA | Analog supply | Powers core ADC, reference buffer, and S/H; range 2.7–5.5 V determines max sampling rate and noise floor. |
| +VBD | Digital I/O supply | Independent rail for logic interface; 1.65–5.5 V allows level-shifting to FPGA/microcontroller I/O. |
| AGND / BDGND | Analog/digital ground | Separate ground pins minimize digital switching noise coupling into analog path; require star-point connection. |
| NC | No internal connection | Pin 2 is unconnected; must not be soldered or biased. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable TAG bit output | Appends channel ID (0/1) to 16-bit data stream in auto-select mode, eliminating external demux logic in dual-sensor systems. |
| Multi-chip daisy chain mode | Enables synchronous sampling and serial readout of multiple ADS8330IRSAT devices using single SCLK/SDI/SDO lines and CDI cascading. |
| Global CONVST with CS independence | Allows simultaneous sampling across multiple converters even when CS is asserted individually per device. |
| Three-tier power-down hierarchy | Deep (50 nA), Nap (0.5 µA), and Auto-Nap (dynamic entry/exit) modes optimize energy use in intermittent-sampling applications. |
| Auto/manual channel select mode | Hardware (CONVST edge count) or software (SDI command) control over +IN0/+IN1 selection, simplifying firmware integration. |
Applications
| Industrial Process Monitoring | High-Accuracy Sensor Interface |
|---|---|
Use Scenario: Continuous monitoring of pressure, temperature, and flow sensors in PLC-based control cabinets with limited board space and thermal budget. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing two 4–20 mA loop sensors simultaneously; uses auto-channel mode and TAG bit for unambiguous data attribution. Use Value: 16-bit resolution and ±1.75 LSB INL ensure <0.01% measurement uncertainty over –40°C to +85°C, meeting SIL-2 functional safety requirements. | Use Scenario: Digitizing outputs from precision strain gauges and RTDs in portable handheld test equipment powered by Li-ion batteries. IC Role / Device Role / Timing Role: Low-power SAR ADC with Nap mode activated between readings; internal CCLK eliminates need for external clock generator. Use Value: 15.5 mW at 1 MSPS and 50 nA deep power-down extend battery life to >12 months in sleep-wake duty cycles. |
| Magnetometer Array Digitization | Medical Transducer Signal Chain |
Use Scenario: Synchronized acquisition from triaxial magnetometer modules in navigation-grade IMUs where inter-channel skew must be minimized. IC Role / Device Role / Timing Role: Dual-input ADC operating in manual channel mode with global CONVST; daisy-chained with identical units for time-aligned sampling. Use Value: 109 dB channel isolation and <10 ps aperture jitter preserve phase coherence across axes for accurate field vector reconstruction. | Use Scenario: Front-end digitization of ECG and bioimpedance signals in Class II medical devices requiring low noise and high CMRR. IC Role / Device Role / Timing Role: ADC with COM pin referenced to right-leg drive circuit; leverages 70 dB CMRR and 33 µV RMS noise for clean biopotential capture. Use Value: Unipolar 0–VREF input range simplifies biasing of AC-coupled sensor signals while maintaining DC-coupled accuracy for baseline drift correction. |
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 |
|---|---|---|---|
| ADS8329IRSAT | Single-channel version; identical core, timing, and power specs; lacks +IN1, COM, and TAG functionality. | Requires external MUX for dual-sensor systems; increases PCB area, BOM count, and channel skew. | Select when only one analog input is needed and cost-per-channel is prioritized over integration. |
| AD7682BCPZ | 16-bit, 250 kSPS, pseudo-differential dual input; SPI-only interface; no internal CCLK or TAG bit. | Lower throughput limits dynamic response; requires external clock; no daisy-chain support. | Select when lower sampling rate suffices and ADI ecosystem compatibility is required. |
Compared with ADS8329IRSAT and AD7682BCPZ, the ADS8330IRSAT uniquely integrates dual-channel selection, TAG bit encoding, and internal clock generation-reducing system-level component count and synchronization complexity without sacrificing resolution or speed.
Availability
ADS8330IRSAT is available at Aetrix Electronics and suitable for industrial process control, portable instrumentation, magnetometer arrays, and medical transducer interfaces requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADS8330IRSAT 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 signal chains.
The ADS8330IRSAT belongs to TI's low-power, high-speed SAR ADC family designed specifically for high-fidelity sensor digitization in space-, power-, and noise-constrained embedded systems.
FAQ
What is the maximum sampling rate of the ADS8330IRSAT under 3-V analog supply conditions?
The ADS8330IRSAT achieves a maximum sampling rate of 1 MSPS when +VA is maintained between 3 V and 5.5 V. At +VA = 2.7 V, the rated throughput drops to 900 kSPS due to internal clock frequency limitations. This behavior is specified in the Electrical Characteristics table under TA = –40°C to +85°C and is verified across production lots. The ADS8330IRSAT maintains full 16-bit performance and linearity specifications at both rates.
Does the ADS8330IRSAT require an external reference voltage, or can it operate with an internal reference?
The ADS8330IRSAT requires an external reference voltage applied between REF+ and REF− pins; it does not include an internal reference. The reference input accepts 0.3 V to +VA, supporting standard 2.5-V or 5-V references. Reference rejection ratio is 78 dB, and input resistance is 40 kΩ. For the ADS8330IRSAT to meet its specified offset and gain error, the external reference must be stable, low-noise, and properly decoupled per TI layout guidelines.
How does the TAG bit function in the ADS8330IRSAT, and which pin carries it?
The TAG bit is a programmable 1-bit identifier appended to the 16-bit conversion result in auto-channel select mode, indicating whether the sample came from +IN0 (TAG = 0) or +IN1 (TAG = 1). It is transmitted on the SDO pin as the 17th bit (MSB+1) immediately following the 16-bit data word. Enabling TAG requires configuration via SDI during initialization; it is inactive in manual channel mode. This feature eliminates external logic for channel demultiplexing in the ADS8330IRSAT.
Can the ADS8330IRSAT be operated in daisy-chain configuration, and what pins are involved?
Yes, the ADS8330IRSAT supports daisy-chain operation using the EOC/INT/CDI pin as a chain data input and SDO as the chain data output. In this mode, multiple ADS8330IRSAT devices share SCLK and FS/CS lines, with the SDO of one device connected to the CDI (EOC/INT/CDI) of the next. All devices sample synchronously on a global CONVST edge, and results are shifted out sequentially. This configuration reduces SPI bus loading and simplifies firmware for multi-ADC systems.
What are the recommended power supply sequencing requirements for the ADS8330IRSAT?
TI specifies that +VA (analog supply) must be established before or simultaneously with +VBD (I/O supply); reverse sequencing is not allowed. Both supplies must remain within absolute maximum ratings (–0.3 V to +7 V) and should ramp monotonically without undershoot or overshoot exceeding ±0.3 V. Decoupling requires 100 nF ceramic capacitors placed within 2 mm of each supply pin to AGND/BDGND, respectively. Violating sequencing may cause latch-up or invalid conversion results in the ADS8330IRSAT.
ADS8330IRSAT 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:
- 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-QFN (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8330IRSAT FAQ
1.How can I place an order for ADS8330IRSAT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8330IRSAT 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 ADS8330IRSAT reliable?
The price and inventory of ADS8330IRSAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8330IRSAT is usually 5 days.
3.What payment methods are accepted for ADS8330IRSAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8330IRSAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8330IRSAT?
ADS8330IRSAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8330IRSAT 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 ADS8330IRSAT?
For technical support, including ADS8330IRSAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8330IRSAT requirements.
6.How does Aetrix verify that ADS8330IRSAT is sourced from the original manufacturer or authorized distributors?
All ADS8330IRSAT 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 ADS8330IRSAT meets industry standards.
7.What is the process for return or replacement of ADS8330IRSAT?
All ADS8330IRSAT units undergo pre-shipment inspection (PSI). If there is an issue with ADS8330IRSAT, 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 ADS8330IRSAT part is unused and in its original packaging.
Return procedure for ADS8330IRSAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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