My Inquiry
My Account
Texas Instruments ADS8330IBRSAR
- Part No.:
- ADS8330IBRSAR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ADS8330IBRSAR.pdf
- Description:
- IC ADC 16BIT SAR 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,035
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS8330IBRSAR 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 ADS8330IBRSAR datasheet, ADS8330IBRSAR pinout, ADS8330IBRSAR application, or ADS8330IBRSAR equivalent, key selection criteria include dual-channel auto/manual channel select mode, 101 dB input channel isolation at 50 kHz, deep power-down current of 2 nA (2.7–3 V), and compatibility with daisy-chain multi-ADC systems using CDI/SDO propagation.
Technical Context
The ADS8330IBRSAR implements a capacitor-based successive approximation register (SAR) architecture with built-in sample-and-hold and programmable conversion trigger (CONVST or auto mode). It supports both internal CCLK (21–24.5 MHz) and external SCLK up to 42 MHz for I/O or combined I/O+conversion clocking.
Its dual-input MUX enables sequential sampling of +IN0 and +IN1 against COM, with configurable TAG bit output indicating active channel. The device features three power-down modes-Deep (2 nA), Nap (0.25 mA), and Auto-Nap-and supports global CONVST independent of CS for synchronized multi-device acquisition.
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 transient capture without external clock dependency. |
| INL / DNL | ±1.75 LSB max INL, ±1 LSB max DNL (IB grade) - ensures <0.003% full-scale linearity error for calibrated measurement systems. |
| SNR / THD | 93 dB SNR, –102 dB THD at 10 kHz - supports >15-bit effective resolution in narrowband signal conditioning. |
| Input Channel Isolation | 101 dB at 50 kHz - prevents crosstalk-induced error when multiplexing between high-impedance sensors. |
| Power Dissipation | 13.2 mW at 900 kSPS, +VA = 2.7 V, +VBD = 1.8 V - suitable for battery-powered portable instrumentation. |
| Operating Temperature | –40°C to +85°C - qualified for industrial process control and embedded test equipment environments. |
Pinout & Package
ADS8330IBRSAR 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 |
|---|---|---|
| REF+ | External reference input positive | Accepts 0.3–3 V (2.7–3.6 V supply) or 0.3–5.5 V (4.5–5.5 V supply); sets full-scale range for unipolar conversion. |
| REF– | External reference input negative | Must be tied to AGND via low-inductance path; defines reference common for ADC core and input MUX. |
| +IN0 / +IN1 | Dual analog input channels | Single-ended inputs referenced to COM; selectable via auto/manual channel mode; support 0 V to VREF range. |
| COM | Common inverting input | Typically grounded; serves as reference point for both +IN0 and +IN1 differential measurements. |
| CONVST | Conversion start trigger | Edge-sensitive input that freezes S/H and initiates conversion; global across all chained devices. |
| EOC/INT/CDI | Status/output/control terminal | Configurable as end-of-conversion flag, interrupt, or chain-data input in daisy-chain topology. |
| FS/CS | Frame sync / chip select | Active-low SPI slave select; also functions as TMS320 DSP frame sync signal. |
| SCLK | Serial clock input | Supports up to 42 MHz; used for data transfer and optionally as conversion clock source. |
| SDI / SDO | Serial data in/out | SDI accepts configuration commands (e.g., channel select, TAG enable); SDO outputs 16-bit straight-binary result + optional TAG bit. |
| +VA / +VBD | Analog / buffer supply | +VA powers ADC core (2.7–5.5 V); +VBD powers digital I/O (1.65–5.5 V), enabling voltage-level translation. |
| AGND / BDGND | Analog / digital ground | Separate ground pins minimize noise coupling; BDGND must not be shorted to AGND on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable TAG bit output | Appends 1-bit channel identifier to each 16-bit conversion result, enabling unambiguous source tracking in dual-channel readouts. |
| Auto/Manual channel select mode | Automatically alternates between +IN0 and +IN1 per conversion, or allows software-controlled single-channel sampling via SDI command. |
| Multi-chip daisy chain capability | CDI input accepts SDO from upstream device; eliminates parallel bus routing and reduces host GPIO count in multi-ADC systems. |
| Comprehensive power-down control | Deep power-down (2 nA) extends battery life; Nap mode retains register state while cutting current to 0.25 mA for rapid wake-up. |
| Global CONVST with CS independence | Allows synchronous sampling across multiple ADS8330IBRSAR devices without requiring simultaneous CS assertion. |
Applications
| Industrial Sensor Interface | Portable Data Logger |
|---|---|
Use Scenario: Simultaneous monitoring of pressure and temperature transducers in PLC I/O modules. IC Role / Device Role / Timing Role: Dual-channel SAR ADC with auto-channel sequencing and 101 dB inter-channel isolation ensures accurate, crosstalk-free digitization of two independent analog signals. Use Value: Eliminates need for two separate ADCs or external MUX, reducing BOM cost and board area by ~40% versus discrete solutions. | Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and CO₂ over 72-hour deployments. IC Role / Device Role / Timing Role: Low-power 16-bit ADC with 2 nA deep power-down and 13.2 mW active operation enables >1-year battery life at 100 Hz sampling. Use Value: Maintains 16-bit resolution while consuming less than 15 µW average power in sleep-active duty cycle. |
| Medical Instrument Front-End | Test & Measurement Equipment |
Use Scenario: Signal conditioning stage in handheld ECG analyzer capturing lead I and II waveforms. IC Role / Device Role / Timing Role: High-SNR (93 dB), low-THD (–102 dB) ADC with programmable EOC polarity synchronizes acquisition to microcontroller DMA triggers. Use Value: Delivers clinical-grade waveform fidelity without external op-amp buffering or calibration circuitry. | Use Scenario: Modular DAQ card for automated test systems requiring synchronized multi-channel voltage measurement. IC Role / Device Role / Timing Role: Daisy-chain-capable ADC supporting global CONVST and CDI/SDO chaining for deterministic timing across 8+ channels. Use Value: Enables precise time-aligned sampling across distributed modules without FPGA-based timing controllers. |
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 |
|---|---|---|---|
| ADS8329IBRSAR | Single-channel variant; identical INL/DNL, power, and timing specs; lacks MUX, TAG bit, and COM pin. | No dual-input capability; requires external MUX for multi-sensor systems; simpler configuration interface. | Select when only one analog input is needed and board space permits external signal routing. |
| AD7682BCPZ | 16-bit, 250 kSPS, pseudo-differential input; SPI-only interface; no internal MUX or TAG bit; higher 0.75 LSB max DNL. | Lower throughput limits use in dynamic signal analysis; requires external level-shifting for bipolar inputs; no daisy-chain support. | Choose for cost-sensitive, lower-speed applications where 250 kSPS suffices and system-level MUX is already present. |
Compared with ADS8329IBRSAR and AD7682BCPZ, the ADS8330IBRSAR uniquely combines dual-channel MUX, TAG bit identification, and 1-MSPS throughput in a 4×4 QFN, making it optimal for space-constrained, multi-sensor industrial DAQ where channel provenance and timing determinism are critical.
Availability
ADS8330IBRSAR is available at Aetrix Electronics and suitable for industrial process control, portable instrumentation, and medical front-end designs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADS8330IBRSAR 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-grade signal chain solutions.
The ADS8330IBRSAR belongs to TI's low-power, high-speed SAR ADC family designed specifically for precision data acquisition in resource-constrained industrial, medical, and test equipment where resolution, speed, and power efficiency must coexist.
FAQ
What is the maximum sampling rate supported by the ADS8330IBRSAR under 3-V supply conditions?
The ADS8330IBRSAR achieves 900 kSPS when operated with +VA = 2.7 V to 3 V and uses an external clock. At +VA = 3 V to 3.6 V, it reaches its full 1-MSPS rating. This stepped performance reflects optimized internal clock generation and power scaling - confirmed in TI's SLAS516C datasheet Section 6.5.
Does the ADS8330IBRSAR require an external reference voltage, or can it operate with an internal reference?
The ADS8330IBRSAR requires an external reference voltage applied between REF+ and REF– pins; it does not include an internal reference. Supported VREF ranges are 0.3–3 V (at +VA = 2.7–3.6 V) or 0.3–5.5 V (at +VA = 4.5–5.5 V), with typical values of 2.5 V or 5 V. This design enables system-level reference selection for optimal noise and accuracy trade-offs.
How does the TAG bit functionality work in the ADS8330IBRSAR, and how is it enabled?
The TAG bit in ADS8330IBRSAR is a programmable 1-bit identifier appended to the 16-bit conversion result, indicating whether the sample came from +IN0 (TAG = 0) or +IN1 (TAG = 1). It is enabled via SPI command written to the configuration register using SDI; once set, the SDO output shifts out 17 bits per frame (16 data + 1 TAG). This feature is exclusive to the ADS8330IBRSAR and not available on the single-channel ADS8329IBRSAR.
What are the recommended layout practices for the thermal pad on the ADS8330IBRSAR QFN package?
The thermal pad on the ADS8330IBRSAR RSA package is internally connected to the silicon substrate and should either be soldered to a dedicated AGND copper pour or left electrically floating - but never connected to BDGND. TI recommends using 4–9 thermal vias (0.25 mm diameter) filled with solder to a solid inner-layer AGND plane, with the pad isolated from digital ground planes to prevent noise coupling into the analog section.
Can the ADS8330IBRSAR be used in daisy-chain configuration, and what pins are involved?
Yes, the ADS8330IBRSAR supports daisy-chain operation using the EOC/INT/CDI pin as chain-data input and SDO as chain-data output. In chain mode, the SDO of one device connects to the CDI pin of the next, allowing serial readout of multiple ADCs with a single SCLK and CS. Configuration requires setting the CHAIN bit in the control register via SDI, and timing must respect td(SDO-CDI) = 23 ns (max) at 2.7 V supply.
ADS8330IBRSAR 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:
- -
ADS8330IBRSAR FAQ
1.How can I place an order for ADS8330IBRSAR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8330IBRSAR 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 ADS8330IBRSAR reliable?
The price and inventory of ADS8330IBRSAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8330IBRSAR is usually 5 days.
3.What payment methods are accepted for ADS8330IBRSAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8330IBRSAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8330IBRSAR?
ADS8330IBRSAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8330IBRSAR 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 ADS8330IBRSAR?
For technical support, including ADS8330IBRSAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8330IBRSAR requirements.
6.How does Aetrix verify that ADS8330IBRSAR is sourced from the original manufacturer or authorized distributors?
All ADS8330IBRSAR 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 ADS8330IBRSAR meets industry standards.
7.What is the process for return or replacement of ADS8330IBRSAR?
All ADS8330IBRSAR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8330IBRSAR, 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 ADS8330IBRSAR part is unused and in its original packaging.
Return procedure for ADS8330IBRSAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS8330IBRSAR Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
