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Texas Instruments ADS8330IRSAR
- Part No.:
- ADS8330IRSAR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ADS8330IRSAR.pdf
- Description:
- IC ADC 16BIT SAR 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,211
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Product details
Overview
ADS8330IRSAR 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 ADS8330IRSAR datasheet, ADS8330IRSAR pinout, ADS8330IRSAR application, or ADS8330IRSAR equivalent, key selection considerations include its dual single-ended input architecture, auto/manual channel select mode, daisy-chain capability, and low-power deep power-down (4 nA) for battery-sensitive embedded measurement nodes.
Technical Context
The ADS8330IRSAR implements a capacitor-based successive-approximation register (SAR) ADC core with inherent sample-and-hold, supporting both manual and auto-triggered conversion modes. Its dual-input MUX enables time-multiplexed sampling of +IN0 and +IN1 against a shared COM reference, with programmable channel selection logic and TAG bit insertion per conversion result.
It features a built-in 22.9 MHz internal conversion clock (CCLK), supports external SCLK up to 42 MHz in I/O-only or I/O+conversion roles, and provides three power-down states-Deep (4 nA), Nap (0.25 mA), and Auto-Nap-with global CONVST independent of CS for synchronized multi-device triggering.
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 = 3–5.5 V; 900 kSPS at +VA = 2.7–3 V - enables high-speed acquisition without external clock tuning. |
| INL / DNL | ±1.75 LSB max INL, ±1 LSB max DNL (I-grade) - ensures <0.003% full-scale linearity error for calibrated sensor interfaces. |
| SNR / THD | 93 dB SNR, –102 dB THD at fIN = 10 kHz - supports high-fidelity digitization of low-noise transducer signals. |
| Power Dissipation | 15.5 mW at 1 MSPS, +VA = 3 V, +VBD = 1.8 V - suitable for thermally constrained portable instrumentation. |
| Input Range | 0 V to VREF (unipolar) - simplifies signal conditioning for grounded-referenced sensors like RTDs or strain gauges. |
| Channel Isolation | 101 dB at 50 kHz - prevents crosstalk between +IN0 and +IN1 during multiplexed acquisition. |
Pinout & Package
ADS8330IRSAR is housed in a 4 × 4 mm, 16-pin QFN package (RSA) with exposed thermal pad internally connected to substrate. Pin 1 is REF+, and the package supports solder reflow per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, REF+ | External reference input | Accepts 0.3–3 V or 2.475–2.525 V (for 2.5 V ref) or 0.3–5.5 V (for 5 V ref); defines full-scale range. |
| 2, NC | No internal connection | Must be left floating or tied to AGND; no electrical function. |
| 3, CONVST | Conversion start trigger | Edge-sensitive input that freezes sample-and-hold and initiates conversion on next internal clock edge. |
| 4, EOC/INT/CDI | Status/output/control | Configurable 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; also serves as frame sync for TMS320 DSP interface. |
| 6, SDI | Serial data input | Accepts configuration commands (e.g., channel select, TAG enable) and software reset instruction. |
| 7, SDO | Serial data output | 3-state output delivering 16-bit straight-binary result plus optional TAG bit; driven only when CS is low. |
| 8, BDGND | Digital interface ground | Separate ground return for +VBD-supplied digital I/O; must be isolated from AGND to minimize noise coupling. |
| 9, SCLK | Serial clock input | Supports up to 42 MHz; used for both data transfer and internal conversion timing when configured accordingly. |
| 10, +VBD | Digital I/O supply | 1.65–5.5 V CMOS-compatible supply; sets logic thresholds for SDI/SDO/FS/CS/CONVST/EOC pins. |
| 11, +VA | Analog supply | 2.7–5.5 V supply for SAR core, reference buffer, and analog front-end; directly impacts power consumption and noise floor. |
| 12, +IN1 | Second analog input | Noninverting input for second channel; sampled when channel select = 1 or in auto-sequencing mode. |
| 13, +IN0 | First analog input | Noninverting input for primary channel; default input selected on power-up or reset. |
| 14, COM | Common inverting input | Shared reference node for both +IN0 and +IN1; typically tied to AGND or system common-mode voltage. |
| 15, AGND | Analog ground | Primary ground reference for analog circuitry, REF–, and COM; requires low-impedance connection to system AGND plane. |
| 16, REF– | Reference negative input | Must be connected to AGND via dedicated via; establishes 0 V reference for external voltage reference. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable TAG bit output | Appends 1-bit identifier to each 16-bit conversion result, enabling unambiguous channel attribution in auto-sequenced dual-channel reads. |
| Auto/manual channel select mode | Hardware-selectable operation: auto-sequencing cycles between +IN0 and +IN1, while manual mode allows deterministic per-conversion channel choice via SDI command. |
| Daisy-chain capability | Supports multi-ADC configurations using CDI/SDO cascading without additional glue logic or FPGA resources. |
| Built-in conversion clock (CCLK) | Eliminates need for external clock source; 22.9 MHz typical frequency enables consistent 1 MSPS throughput regardless of SCLK stability. |
| Three-tier power-down hierarchy | Deep (4 nA), Nap (0.25 mA), and Auto-Nap (dynamic entry/exit) modes allow fine-grained energy management in intermittent-sampling applications. |
Applications
| Industrial Process Monitoring | Medical Sensor Interface |
|---|---|
Use Scenario: Continuous monitoring of temperature (RTD), pressure (bridge), and flow (magnetic) sensors in PLC-based control cabinets. IC Role / Device Role / Timing Role: Dual-channel ADC digitizes two independent analog inputs per cycle, with programmable channel sequencing and 16-bit resolution preserving sensor fidelity. Use Value: 101 dB channel isolation prevents cross-coupling between critical process variables, while 93 dB SNR ensures accurate detection of sub-millivolt-level transducer outputs. | Use Scenario: Portable patient monitors acquiring ECG lead signals and SpO₂ photodiode outputs simultaneously. IC Role / Device Role / Timing Role: Simultaneous sampling of differential ECG (+IN0/COM) and single-ended optical sensor (+IN1/COM) with shared reference and precise timing alignment. Use Value: ±1.75 LSB INL maintains clinical-grade accuracy over –40°C to +85°C, and 15.5 mW power enables >8-hour battery life in handheld units. |
| Magnetometer Data Acquisition | Automated Test Equipment (ATE) |
Use Scenario: High-resolution magnetic field mapping using triaxial fluxgate or AMR sensors requiring synchronized multi-axis sampling. IC Role / Device Role / Timing Role: Dual-input MUX captures X/Y axis signals with identical aperture delay (5 ns) and jitter (10 ps), ensuring phase-coherent vector reconstruction. Use Value: 101 dB input channel isolation eliminates mutual interference between orthogonal sensor axes, and 1 MSPS rate supports real-time FFT-based spectral analysis. | Use Scenario: Modular ATE slot cards performing parallel parametric testing of analog ICs with multiple voltage/current measurements. IC Role / Device Role / Timing Role: Daisy-chained ADS8330IRSAR devices synchronize conversions via shared CONVST and CS, enabling simultaneous sampling across 4–8 channels. Use Value: Global CONVST support and EOC/INT programmability simplify timing coordination in multi-board test fixtures without FPGA-based sequencers. |
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 |
|---|---|---|---|
| ADS8329IRSAR | Single-input (no MUX), identical core performance, same package and pinout except +IN1/COM replaced by –IN. | Lacks dual-channel capability; suited for single-ended or pseudo-differential inputs only. | Select when only one analog channel is required and board layout re-use with ADS8330IRSAR is prioritized. |
| AD7689BCPZ-RL7 | 16-bit, 250 kSPS, 4-channel MUX, SPI interface, but no TAG bit or daisy-chain mode; higher 2.5 mW typical power at 250 kSPS. | Lower speed and channel count; optimized for lower-cost, lower-power multichannel systems rather than high-speed dual acquisition. | Choose for cost-sensitive, lower-throughput applications where 4:1 MUX flexibility outweighs 1 MSPS requirement. |
Compared with ADS8329IRSAR, ADS8330IRSAR adds dual-input multiplexing and TAG bit functionality at identical speed and accuracy; versus AD7689BCPZ-RL7, it offers 4× higher throughput and integrated daisy-chain support but with fixed 2-channel topology.
Availability
ADS8330IRSAR is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, magnetometer data acquisition, and automated test equipment requiring stable component supply and long-term production continuity.
Supply support for ADS8330IRSAR 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 company specializing in analog and embedded processing technologies, with leadership in precision data converters and industrial interface solutions.
The ADS8330IRSAR belongs to TI's low-power, high-speed SAR ADC family designed for precision measurement in space- and power-constrained systems, emphasizing DC accuracy, AC performance, and flexible digital interfacing.
FAQ
What is the maximum sampling rate of the ADS8330IRSAR under 3-V analog supply conditions?
The ADS8330IRSAR achieves a maximum sampling rate of 900 kSPS when operated with +VA = 2.7 V to 3 V and an external clock. At +VA = 3 V to 3.6 V, it sustains 1 MSPS using either internal or external clocking. This dual-rate capability allows designers to optimize power versus speed without changing hardware.
Does the ADS8330IRSAR require an external reference voltage, or does it include an internal reference?
The ADS8330IRSAR does not include an internal voltage reference and requires an external reference applied between REF+ and REF– pins. Supported reference ranges are 0.3–3 V (for 2.5 V nominal) or 0.3–5.5 V (for 5 V nominal), with tight tolerance requirements (±25 mV at 2.5 V) to maintain specified INL and gain error performance.
How does the programmable TAG bit function in the ADS8330IRSAR, and how is it enabled?
The TAG bit in ADS8330IRSAR is a user-configurable 1-bit identifier appended to each 16-bit conversion result to distinguish between +IN0 and +IN1 channels. It is enabled via a configuration command written to the SDI pin during initialization; once set, the TAG bit appears as the MSB+1 position in the 17-bit serial output stream.
Can the ADS8330IRSAR operate in daisy-chain mode with other ADCs, and what pins are involved?
Yes, the ADS8330IRSAR supports daisy-chain mode using the EOC/INT/CDI pin as chain data input and SDO as chain data output. In this configuration, multiple ADS8330IRSAR devices share a common SCLK and FS/CS, with each device's SDO connected to the next device's CDI, enabling synchronized multi-ADC readout with minimal interface lines.
What are the power-down current specifications for the ADS8330IRSAR, and how are the modes selected?
The ADS8330IRSAR offers three power-down modes: Deep (4 nA), Nap (0.25 mA), and Auto-Nap (dynamic entry/exit). Mode selection is controlled via SPI commands sent to the SDI pin; Deep mode disables all circuitry except wake-up logic, while Nap retains register state and enables fast wake-up (<1 µs) for burst-mode acquisition.
ADS8330IRSAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
ADS8330IRSAR FAQ
1.How can I place an order for ADS8330IRSAR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8330IRSAR 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 ADS8330IRSAR reliable?
The price and inventory of ADS8330IRSAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8330IRSAR is usually 5 days.
3.What payment methods are accepted for ADS8330IRSAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8330IRSAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8330IRSAR?
ADS8330IRSAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8330IRSAR 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 ADS8330IRSAR?
For technical support, including ADS8330IRSAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8330IRSAR requirements.
6.How does Aetrix verify that ADS8330IRSAR is sourced from the original manufacturer or authorized distributors?
All ADS8330IRSAR 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 ADS8330IRSAR meets industry standards.
7.What is the process for return or replacement of ADS8330IRSAR?
All ADS8330IRSAR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8330IRSAR, 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 ADS8330IRSAR part is unused and in its original packaging.
Return procedure for ADS8330IRSAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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