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Texas Instruments ADS8326IDRBR
- Part No.:
- ADS8326IDRBR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
ADS8326IDRBR.pdf
- Description:
- IC ADC 16BIT SAR 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:1,678
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Product details
Overview
ADS8326IDRBR from Texas Instruments is a 16-bit, SAR analog-to-digital converter with differential input, SPI/SSI-compatible serial interface, and microPower operation (2mW at 2.7V/100kHz). It delivers ±1.5LSB max INL, 14.35-bit ENOB at 10kHz, and supports 0.1V–VDD reference voltage - used in battery-powered data acquisition and isolated sensor interfaces.
For engineers reviewing the ADS8326IDRBR datasheet, ADS8326IDRBR pinout, ADS8326IDRBR application, or ADS8326IDRBR equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance across full supply range, low 30μVRMS noise, power-down current of 0.6μW, and SON-8 package compatibility with space-constrained portable systems.
Technical Context
The ADS8326IDRBR implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling single-cycle 16-bit conversion in 22 DCLOCK cycles. Its differential input stage accepts common-mode signals from –0.3V to 0.5V and supports programmable reference from 0.1V to VDD.
Timing is controlled by an external DCLOCK (24kHz–6MHz), with CS/SHDN managing chip select and shutdown modes. The device outputs straight binary via DOUT on falling DCLOCK edges, supporting LSB-first transfer without frame synchronization overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16 bits - guarantees full-scale monotonicity and no missing codes over –40°C to +85°C. |
| INL (max) | ±1.5 LSB - ensures end-point linearity error ≤ ±0.0023% of FSR for precision measurement calibration. |
| Throughput rate | 200 kSPS at 2.7V - enables real-time sampling of vibration or motor control feedback signals. |
| Power dissipation | 3.73 mW at 2.7V/200kHz - allows continuous operation in thermally constrained handheld instruments. |
| Reference range | 0.1V to VDD - permits direct interfacing with low-voltage sensors or internal bandgap references. |
| Input noise | 30 μVRMS - supports <14.35-bit effective resolution for DC and low-frequency signal digitization. |
| Shutdown current | 0.6 μW at 5V - reduces standby power to negligible levels in wake-on-event sensor nodes. |
Pinout & Package
ADS8326IDRBR is housed in an 8-pin SON (Small Outline No-Lead) package, 3mm × 3mm × 0.9mm, with exposed thermal pad internally connected to substrate. The pad may be tied to analog ground or left floating - must be isolated from digital ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF | Analog reference input | Accepts 0.1V–VDD reference voltage; input resistance ≥5 GΩ enables high-impedance reference source coupling. |
| +IN | Differential analog input (noninverting) | Sampled with 48pF input capacitance; supports common-mode range –0.3V to 0.5V relative to GND. |
| –IN | Differential analog input (inverting) | Completes differential pair; matched to +IN for CMRR >70dB up to 10kHz. |
| GND | Analog ground reference | Primary return path for analog inputs and reference; separate from digital ground per layout guidance. |
| CS/SHDN | Digital control input | Active-low chip select; driven high to enter 0.6μW shutdown mode with fast wake-up (<1μs). |
| DOUT | Digital serial output | CMOS/LVCMOS-compatible; outputs 16-bit straight binary LSB-first on falling DCLOCK edge. |
| DCLOCK | Digital clock input | Asynchronous master clock (24kHz–6MHz); defines conversion speed and data timing without duty cycle constraints. |
| VDD | Power supply | 2.7V–5.5V operation; supplies analog core, reference buffer, and digital I/O; decoupling required per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit no-missing-codes performance | Guaranteed over full temperature and supply range - eliminates code ambiguity in closed-loop control. |
| MicroPower scalability | 0.2mW average at 10kHz sampling - enables multi-year battery life in remote monitoring nodes. |
| Differential input with wide common-mode range | –0.3V to 0.5V common-mode tolerance - accommodates industrial transducer outputs without level-shifting. |
| SPI/SSI-compatible serial interface | No frame sync or configuration registers needed - simplifies host MCU firmware and reduces GPIO count. |
| Pin-compatible upgrade path | Direct replacement for ADS7816/ADS7822/ADS8325 - allows resolution upgrade without PCB redesign. |
Applications
| Battery-Powered Data Loggers | Isolated Sensor Interfaces |
|---|---|
|
Use Scenario: Continuous 16-bit sampling of temperature, pressure, and humidity sensors in field-deployed environmental monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Primary ADC capturing conditioned analog outputs; operates at 10–100kHz with automatic power-down between samples. Use Value: 0.2mW average power at 10kHz extends battery life beyond 5 years; 30μVRMS noise preserves sub-0.1% measurement accuracy. |
Use Scenario: Digitizing current-sense or voltage-sense signals across galvanic isolation barriers in motor drives and power supplies. IC Role / Device Role / Timing Role: High-linearity ADC placed on isolated side; referenced to local low-noise LDO, communicating via optocoupler-isolated SPI. Use Value: ±1.5LSB INL ensures calibrated current feedback remains within safety thresholds; differential input rejects common-mode noise induced across isolators. |
| Industrial Control I/O Modules | Vibration Analysis Front-Ends |
|
Use Scenario: Analog input channel in DIN-rail PLC modules acquiring 4–20mA loop signals and thermocouple outputs with cold-junction compensation. IC Role / Device Role / Timing Role: Precision ADC with programmable reference; interfaces to op-amp signal conditioning and microcontroller via minimal SPI lines. Use Value: 0.1V–VDD reference flexibility allows direct use of 2.5V internal reference or external 4.096V for 16-bit resolution over 0–10V range. |
Use Scenario: High-fidelity acquisition of accelerometer outputs in predictive maintenance systems sampling at 20–100kHz for FFT-based fault detection. IC Role / Device Role / Timing Role: Low-noise ADC front-end; captures broadband mechanical signals with 14.35-bit ENOB at 10kHz and SFDR >94dB. Use Value: 94dB spurious-free dynamic range resolves harmonic sidebands critical for bearing defect identification; 200kSPS throughput supports Nyquist sampling up to 100kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution, low-power SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8325IDRBR | 16-bit, 100kSPS, ±2LSB INL, same SON-8 package, no power-down mode | Lacks shutdown capability; higher static current (1.86mW at 100kHz vs. 0.18mW) | Select when lowest cost and moderate throughput suffice, and continuous operation is acceptable. |
| ADS8860IDRCT | 16-bit, 1MSPS, ±1.5LSB INL, 12-pin WSON, SPI interface, 2.7–3.6V only | Higher speed but narrower supply range; requires external reference; no integrated reference buffer | Select for high-speed portable test equipment where 1MSPS and ultra-low noise (17μVRMS) outweigh supply flexibility. |
Compared with ADS8325IDRBR and ADS8860IDRCT, ADS8326IDRBR uniquely balances 200kSPS throughput, 0.6μW shutdown, and 2.7–5.5V operation - making it optimal for dual-supply industrial sensors and long-life battery systems requiring guaranteed 16-bit linearity without layout changes.
Availability
ADS8326IDRBR is available at Aetrix Electronics and suitable for battery-operated systems, isolated data acquisition modules, and industrial control I/O requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for ADS8326IDRBR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The ADS8326 belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-power data acquisition in portable instrumentation, process control, and condition monitoring systems.
FAQ
What is the maximum sampling rate of the ADS8326IDRBR?
The ADS8326IDRBR achieves a maximum throughput rate of 200 kSPS when operated at VDD = 2.7V and fDCLOCK = 4.8MHz. At VDD = 5V and fDCLOCK = 6MHz, the rate increases to 250 kSPS. Both rates require exactly 22 DCLOCK cycles per conversion, with timing validated across –40°C to +85°C.
Does the ADS8326IDRBR require an external reference voltage?
No - the ADS8326IDRBR accepts an externally applied reference voltage at the REF pin, but does not include an internal reference. It supports any stable reference from 0.1V to VDD, enabling flexible system-level reference selection (e.g., 2.5V bandgap, 4.096V precision, or ratiometric sensor excitation).
What is the power consumption of the ADS8326IDRBR in shutdown mode?
In shutdown mode (CS/SHDN = high), the ADS8326IDRBR draws just 0.6 μW at VDD = 5V and 0.3 μW at VDD = 2.7V. This ultra-low state is fully specified across temperature and enables rapid wake-up (<1μs) for event-triggered sampling in energy-harvesting or battery-critical applications.
Is the ADS8326IDRBR pin-compatible with other TI SAR ADCs?
Yes - the ADS8326IDRBR shares identical pinout and footprint with ADS7816, ADS7822, ADS7826, ADS7827, ADS7829, ADS8320, and ADS8325 in both MSOP-8 and SON-8 packages. This allows direct resolution upgrades without PCB revision, provided timing and reference configurations are updated per datasheet requirements.
What digital interface protocol does the ADS8326IDRBR support?
The ADS8326IDRBR implements an SPI/SSI-compatible synchronous serial interface using three dedicated pins: DCLOCK (input), DOUT (output), and CS/SHDN (chip select/shutdown). It transmits 16-bit straight binary LSB-first on each falling DCLOCK edge, with no command framing or register addressing required.
ADS8326IDRBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-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:
- 2.7V ~ 3.6V, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V, 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SON (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8326IDRBR FAQ
1.How can I place an order for ADS8326IDRBR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8326IDRBR 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 ADS8326IDRBR reliable?
The price and inventory of ADS8326IDRBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8326IDRBR is usually 5 days.
3.What payment methods are accepted for ADS8326IDRBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8326IDRBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8326IDRBR?
ADS8326IDRBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8326IDRBR 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 ADS8326IDRBR?
For technical support, including ADS8326IDRBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8326IDRBR requirements.
6.How does Aetrix verify that ADS8326IDRBR is sourced from the original manufacturer or authorized distributors?
All ADS8326IDRBR 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 ADS8326IDRBR meets industry standards.
7.What is the process for return or replacement of ADS8326IDRBR?
All ADS8326IDRBR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8326IDRBR, 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 ADS8326IDRBR part is unused and in its original packaging.
Return procedure for ADS8326IDRBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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