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Texas Instruments ADS8330IBRSAT
- Part No.:
- ADS8330IBRSAT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ADS8330IBRSAT.pdf
- Description:
- IC ADC 16BIT SAR 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:528
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Product details
Overview
ADS8330IBRSAT 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 sensor interfaces.
For engineers reviewing the ADS8330IBRSAT datasheet, ADS8330IBRSAT pinout, ADS8330IBRSAT application, or ADS8330IBRSAT equivalent, this page provides verified technical context, validated pin functions, confirmed dual-input timing behavior, real-world application cards, and two manufacturer-validated alternative parts for system-level design continuity.
Technical Context
The ADS8330IBRSAT implements a capacitor-based SAR architecture with built-in sample-and-hold and internal conversion clock (22.3 MHz typical). Its dual single-ended input channels (+IN0/+IN1) share one ADC core, with COM as common inverting reference and programmable auto/manual channel selection logic.
It supports three power-down modes-Deep (50 nA), Nap (0.4 µA), and Auto-Nap-with global CONVST independent of CS, daisy-chain capability via CDI/SDO, and EOC/INT/CDI pin configurable for end-of-conversion signaling or interrupt generation with polarity control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonic transfer function across full temperature range. |
| Sampling Rate | 1 MSPS at +VA ≥ 3 V; 900 kSPS at +VA = 2.7 V - enables high-speed sensor sampling without external clock dependency. |
| INL | ±1.75 LSB max - ensures <0.003% full-scale linearity error for calibrated measurement systems. |
| SNR | 93 dB at fIN = 10 kHz - supports >15-bit effective resolution in low-noise signal chains. |
| Power Dissipation | 15.5 mW at 1 MSPS, +VA = 3 V, +VBD = 1.8 V - enables battery-powered portable instrumentation. |
| Input Range | 0 V to VREF (unipolar) - simplifies front-end design by eliminating level-shifting for ground-referenced sensors. |
| Channel Isolation | 109 dB at 50 kHz - prevents crosstalk between +IN0 and +IN1 during multiplexed acquisition. |
Pinout & Package
ADS8330IBRSAT is housed in a 4 × 4 mm, 16-pin QFN package (RSA) with exposed thermal pad internally connected to substrate. Pin 1 is REF+, pin 16 is REF–, and the thermal pad may be connected to AGND or left floating - but must remain isolated from BDGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN0 (Pin 13) | Noninverting analog input, Channel 0 | Primary single-ended input node; referenced to COM; supports 0–VREF unipolar range. |
| +IN1 (Pin 12) | Noninverting analog input, Channel 1 | Secondary input for multiplexed acquisition; shares same ADC core and reference path as +IN0. |
| COM (Pin 14) | Common inverting input | Shared reference point for both channels; typically tied to AGND for unipolar operation. |
| CONVST (Pin 3) | Conversion start trigger | Edge-sensitive input that freezes S/H and initiates conversion on next internal clock edge - independent of CS state. |
| EOC/INT/CDI (Pin 4) | Status/output/control terminal | Configurable as end-of-conversion flag, programmable-duration interrupt, or daisy-chain data input in multi-device systems. |
| FS/CS (Pin 5) | Frame sync / chip select | Active-low SPI slave select; also serves as frame sync for TMS320 DSP interface mode. |
| SCLK (Pin 9) | Serial clock input | Supports up to 50 MHz externally; doubles as I/O clock and internal conversion clock when used in master mode. |
| SDI (Pin 6) | Serial data input | Accepts configuration bits (e.g., channel select, TAG enable) and software reset command during first 4 SCLK cycles. |
| SDO (Pin 7) | Serial data output | Outputs 16-bit straight-binary result MSB-first; includes optional TAG bit in dual-channel mode. |
| REF+ (Pin 1) | External reference positive | Accepts 0.3 V to +VA; sets full-scale range; requires low-impedance source due to 40 kΩ input resistance. |
| REF– (Pin 16) | External reference negative | Must be connected to AGND via dedicated via; defines reference return path for optimal PSRR and CMRR. |
| +VA (Pin 11) | Analog supply | 2.7–5.5 V rail powering SAR core, S/H, and reference buffer; separate from digital I/O supply. |
| +VBD (Pin 10) | Buffer/digital I/O supply | 1.65–5.5 V rail powering SPI interface, logic, and output drivers; enables voltage-level translation with host processor. |
| AGND (Pin 15) | Analog ground | Reference for analog circuitry; must be star-connected to REF– and COM to minimize noise coupling. |
| BDGND (Pin 8) | Digital interface ground | Return path for +VBD-supplied logic; physically separated from AGND to prevent digital switching noise injection. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable TAG bit output | Appends channel-identifying bit to 16-bit data stream in dual-channel mode - eliminates need for external demux logic or timestamping. |
| Auto/Manual channel select mode | Hardware-selectable acquisition sequencing - auto mode cycles +IN0→+IN1 continuously; manual mode allows per-conversion channel choice via SDI. |
| Built-in conversion clock (CCLK) | 22.3 MHz internal oscillator eliminates external crystal or clock generator - reduces BOM count and layout complexity. |
| Multi-chip daisy chain support | CDI input accepts SDO from upstream device - enables synchronized sampling across multiple ADS8330 units using single SCLK/CONVST. |
| Global CONVST independent of CS | Starts conversion regardless of FS/CS state - supports simultaneous triggering in multi-converter systems without inter-device coordination delays. |
Applications
| Industrial Process Monitoring | Medical Sensor Interface |
|---|---|
Use Scenario: Continuous monitoring of pressure and temperature transducers in PLC-based control cabinets with 4–20 mA loop integration. IC Role / Device Role / Timing Role: Dual-channel ADC digitizes two analog sensor outputs per cycle; TAG bit identifies source channel in real time. Use Value: 16-bit resolution and ±1.75 LSB INL ensure <0.01% measurement accuracy over –40°C to +85°C, meeting IEC 61000-6-2 immunity requirements. | Use Scenario: Portable ECG front-end acquiring lead-I and lead-II signals with simultaneous sampling and low-power operation. IC Role / Device Role / Timing Role: Simultaneous capture of two biopotential channels using auto-channel mode; deep power-down extends battery life between readings. Use Value: 93 dB SNR at 10 kHz and 109 dB channel isolation suppress common-mode interference and electrode motion artifacts. |
| Magnetometer Data Acquisition | Automated Test Equipment (ATE) |
Use Scenario: High-precision magnetic field mapping using triaxial fluxgate sensors requiring synchronized X/Y/Z sampling. IC Role / Device Role / Timing Role: Daisy-chained ADS8330IBRSAT units triggered by shared CONVST for deterministic inter-device skew <5 ns. Use Value: Aperture jitter of 10 ps and 100 ns overvoltage recovery enable accurate capture of fast transient field changes. | Use Scenario: Modular ATE slot card digitizing multiple DUT analog outputs with minimal latency and deterministic timing. IC Role / Device Role / Timing Role: SPI interface with 50 MHz SCLK supports 16-bit readout in <320 ns; EOC/INT pin provides hardware handshake to FPGA controller. Use Value: 1 MSPS throughput and 18-cycle conversion time allow sub-microsecond per-sample latency in closed-loop test sequences. |
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 |
|---|---|---|---|
| ADS8329IBRSAT | Single-channel variant; identical INL (±1.75 LSB), SNR (93 dB), and power (15.5 mW); lacks +IN1, COM, and TAG functionality. | Requires external multiplexer for dual-sensor systems; increases board area, propagation delay, and calibration complexity. | Select when only one analog input is needed and cost-per-channel optimization is critical. |
| AD7682BCPZ-RL7 | 16-bit, 250 kSPS, pseudo-differential input; ±1.5 LSB INL; 87 dB SNR; SPI-compatible but no daisy chain or TAG bit. | Lower throughput limits dynamic signal capture; pseudo-differential architecture requires matched input impedances and increases front-end design effort. | Select for lower-power, lower-cost applications where 250 kSPS suffices and channel identification is handled in firmware. |
Compared with ADS8329IBRSAT and AD7682BCPZ-RL7, the ADS8330IBRSAT uniquely combines dual-channel hardware multiplexing, TAG-bit channel identification, and 1-MSPS throughput in a single 4×4 mm QFN - reducing system latency, PCB footprint, and calibration overhead in time-critical multi-sensor systems.
Availability
ADS8330IBRSAT is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, magnetometer interfacing, and automated test equipment requiring stable component supply and guaranteed long-term manufacturability.
Supply support for ADS8330IBRSAT 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 and embedded processing technologies, with leadership in precision data converters and industrial-grade ICs.
The ADS8330IBRSAT belongs to TI's low-power, high-speed SAR ADC family designed for precision sensor signal chains in harsh environments - emphasizing DC accuracy, AC performance, and flexible digital interfacing for industrial and medical applications.
FAQ
What is the maximum sampling rate supported by the ADS8330IBRSAT under 3-V analog supply conditions?
The ADS8330IBRSAT 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 limitations. Both rates are achievable without external clocking, as the device uses its built-in 22.3 MHz conversion clock. This behavior is specified in the Electrical Characteristics table for TA = –40°C to +85°C and VREF = 2.5 V.
Does the ADS8330IBRSAT require an external reference voltage, and what are the valid input ranges?
Yes, the ADS8330IBRSAT requires an external reference applied between REF+ and REF– pins. Valid REF+ voltage is 0.3 V to +VA, with REF– tied to AGND. For +VA = 3 V, VREF must be 2.475 V to 2.525 V at fSAMPLE > 500 kSPS; for +VA = 5 V, VREF ranges from 4.95 V to 5.05 V. The reference input resistance is 40 kΩ, necessitating a low-output-impedance source to maintain INL and gain error specs.
How does the TAG bit function in dual-channel mode on the ADS8330IBRSAT?
In dual-channel mode, the ADS8330IBRSAT appends a 1-bit TAG to the standard 16-bit straight-binary output, producing an 17-bit serial word. The TAG bit equals '0' for +IN0 conversions and '1' for +IN1 conversions. This occurs automatically in auto-channel mode or based on SDI-configured channel selection in manual mode. The TAG bit eliminates firmware-based channel tracking and enables direct hardware demultiplexing in FPGA-based receivers.
Can the ADS8330IBRSAT operate with different analog and I/O supply voltages, and what are the allowable ranges?
Yes, the ADS8330IBRSAT supports independent analog and digital supplies. +VA (analog supply) operates from 2.7 V to 5.5 V, while +VBD (buffer/I/O supply) ranges from 1.65 V to 1.5×(+VA) - e.g., 1.65–4.5 V when +VA = 3 V, or 1.65–5.5 V when +VA = 5 V. This separation allows interfacing with 1.8-V or 3.3-V microcontrollers while maintaining full analog performance, with VIH/VIL thresholds scaling accordingly.
What power-down modes are available on the ADS8330IBRSAT, and how do they affect current consumption?
The ADS8330IBRSAT offers three power-down modes: Deep (4–50 nA), Nap (0.25–0.4 µA), and Auto-Nap (0.25–0.4 µA). Deep mode disables all circuitry except wake-up logic; Nap retains register state and reference buffer bias; Auto-Nap automatically enters Nap after conversion completion. All modes retain configuration registers and require no reinitialization on wake-up, enabling rapid resumption of sampling with sub-microsecond exit time.
ADS8330IBRSAT 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:
- -
ADS8330IBRSAT FAQ
1.How can I place an order for ADS8330IBRSAT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8330IBRSAT 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 ADS8330IBRSAT reliable?
The price and inventory of ADS8330IBRSAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8330IBRSAT is usually 5 days.
3.What payment methods are accepted for ADS8330IBRSAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8330IBRSAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8330IBRSAT?
ADS8330IBRSAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8330IBRSAT 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 ADS8330IBRSAT?
For technical support, including ADS8330IBRSAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8330IBRSAT requirements.
6.How does Aetrix verify that ADS8330IBRSAT is sourced from the original manufacturer or authorized distributors?
All ADS8330IBRSAT 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 ADS8330IBRSAT meets industry standards.
7.What is the process for return or replacement of ADS8330IBRSAT?
All ADS8330IBRSAT units undergo pre-shipment inspection (PSI). If there is an issue with ADS8330IBRSAT, 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 ADS8330IBRSAT part is unused and in its original packaging.
Return procedure for ADS8330IBRSAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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