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Texas Instruments ADS8326IBDRBR
- Part No.:
- ADS8326IBDRBR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
ADS8326IBDRBR.pdf
- Description:
- IC ADC 16BIT SAR 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:2,275
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Product details
Overview
ADS8326IBDRBR 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 ±1.5 LSB max INL, 14.35-bit ENOB at 10kHz, and supports 0.1V–VDD reference voltage - used in isolated data acquisition, battery-powered vibration analysis, and multichannel industrial control systems.
For engineers reviewing the ADS8326IBDRBR datasheet, ADS8326IBDRBR pinout, ADS8326IBDRBR application, or ADS8326IBDRBR equivalent, key selection considerations include its SON-8 package, 200kSPS throughput at 2.7V, power-down current of 0.6μW, differential input range up to VREF, and guaranteed no missing codes across full supply range.
Technical Context
The ADS8326IBDRBR implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling single-cycle acquisition and conversion without external components. Its internal clock synchronization via DCLOCK pin allows precise timing control over sampling dynamics and serial output alignment.
It operates with true differential analog inputs (+IN/–IN), supports unipolar or pseudo-differential configurations, and features CMOS/LVCMOS-compatible digital I/O with programmable shutdown (CS/SHDN) for dynamic power management - critical for portable and remote sensing nodes requiring low quiescent current and high DC accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16 bits with no missing codes across full supply range - ensures monotonicity and integrity in precision measurement applications. |
| INL (max) | ±1.5 LSB at 5V supply - enables accurate absolute voltage measurement without calibration in industrial sensor interfaces. |
| Throughput Rate | 200 kSPS at 2.7V, 250 kSPS at 5V - supports real-time signal capture in multichannel data loggers and motor control feedback loops. |
| Power Dissipation | 2 mW at 2.7V/100kHz; 0.6 μW in power-down - extends battery life in handheld test equipment and wireless sensor nodes. |
| Reference Range | 0.1 V to VDD - allows flexible scaling from low-voltage sensors (e.g., 250mV bridge outputs) to full-rail inputs without external amplification. |
| ENOB | 14.35 bits at 10kHz (5VPP sinewave) - provides >85 dB SNR for high-fidelity acquisition in vibration monitoring and audio-grade instrumentation. |
| Digital Interface | SPI/SSI-compatible, LSB-first, 22–24 clock cycles per conversion - simplifies integration with ARM Cortex-M and FPGA-based controllers using standard peripheral drivers. |
Pinout & Package
ADS8326IBDRBR is housed in an 8-pin SON (Small Outline No-lead) package, 3 mm × 3 mm × 0.9 mm, with exposed thermal pad internally connected to substrate - recommended for connection to analog ground to optimize thermal performance and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF | Reference input | Accepts 0.1V–VDD reference voltage; high-impedance (5 GΩ) input enables direct connection to precision voltage references or resistor dividers. |
| +IN | Analog noninverting input | Differential input node; sampled during tSMPL (4.5–5 DCLOCK cycles); supports common-mode range from –0.3V to 0.5V relative to GND. |
| –IN | Analog inverting input | Differential input node; tied to GND for unipolar operation; input resistance 100–150 Ω when active, 5 GΩ when off. |
| GND | Analog ground | Primary return path for analog circuitry; must be separated from digital ground to minimize noise coupling into ADC core. |
| CS/SHDN | Digital control input | Active-low chip select; high level forces device into shutdown mode (0.6 μW dissipation), reducing system standby power. |
| DOUT | Digital serial output | CMOS/LVCMOS-compatible, tri-state capable; outputs 16-bit straight binary LSB-first after conversion completion. |
| DCLOCK | Digital clock input | Asynchronous master clock (24 kHz–4.8 MHz); rising edge triggers sampling and falling edge aligns DOUT valid window. |
| VDD | Power supply | 2.7V–5.5V operation; powers analog and digital sections; decoupling capacitor required near pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit no-missing-codes performance | Guaranteed over full temperature range (–40°C to +85°C) and supply range - eliminates code gaps in closed-loop control and calibration systems. |
| MicroPower operation at low data rates | Average power < 0.2 mW at 10 kHz sampling - enables multi-year battery life in remote environmental monitors and IoT edge nodes. |
| Differential input with wide common-mode range | Supports ±0.3V to 0.5V common-mode input while maintaining linearity - accommodates noisy industrial sensor outputs without front-end attenuation. |
| Pin-compatible upgrade path | Direct replacement for ADS7816, ADS7822, ADS7826, ADS7827, ADS7829, ADS8320, and ADS8325 - reduces redesign effort in legacy 12-/16-bit systems. |
| Low-noise architecture (3 LSBPP) | Peak-to-peak noise floor optimized for DC and low-frequency signals - improves resolution in strain gauge, thermocouple, and RTD measurement circuits. |
Applications
| Battery-Powered Data Logger | Isolated Industrial Sensor Interface |
|---|---|
Use Scenario: Portable environmental monitor logging temperature, humidity, and air quality over weeks on coin-cell battery. IC Role / Device Role / Timing Role: Primary ADC capturing conditioned sensor outputs at 10–100 Hz with automatic power-down between samples. Use Value: 0.2 mW average power at 10 kHz sampling enables >2-year battery life; 16-bit resolution captures subtle drift in calibrated sensors. |
Use Scenario: DIN-rail mounted PLC module acquiring 4–20 mA current loop signals across galvanically isolated barrier. IC Role / Device Role / Timing Role: High-accuracy front-end ADC interfacing with isolated sigma-delta modulator or optocoupled analog channel. Use Value: ±1.5 LSB INL and 14.35-bit ENOB ensure compliance with IEC 61000-4-5 surge immunity and SIL-2 functional safety requirements. |
| Simultaneous Multichannel Vibration Analyzer | Robotics Joint Torque Feedback System |
Use Scenario: Compact handheld analyzer synchronously sampling 4+ accelerometer channels for FFT-based bearing fault detection. IC Role / Device Role / Timing Role: One ADS8326IBDRBR per channel, driven by shared DCLOCK for deterministic inter-channel phase alignment. Use Value: 200 kSPS throughput at 2.7V supports 5 kHz Nyquist bandwidth; differential input rejects common-mode noise from motor EMI. |
Use Scenario: Servo drive board measuring torque via strain-gauge bridge in each robotic joint, requiring compact size and low self-heating. IC Role / Device Role / Timing Role: Precision ADC digitizing ratiometric bridge output with internal reference tracking supply variations. Use Value: 0.1V–VDD reference flexibility allows direct use of 2.5V bridge excitation; SON-8 footprint saves PCB area in space-constrained motor modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8325IBDRBR | Same 16-bit SAR architecture, but 1 MSPS throughput and higher power (15 mW at 5V); requires faster DCLOCK (up to 24 MHz). | Targeted at high-speed transient capture (e.g., power quality analyzers), not ultra-low-power logging. | Select ADS8325IBDRBR only if >200 kSPS is required and system can accommodate higher supply current and clock speed. |
| AD7682BCPZ-RL7 | 16-bit SAR ADC with 250 kSPS, SPI interface, and internal reference; consumes 4.5 mW at 5V/250 kSPS; no shutdown mode. | Lacks CS/SHDN pin and flexible reference input - less suitable for battery-operated devices needing deep sleep states. | Choose AD7682BCPZ-RL7 when internal 2.5V reference suffices and board layout favors fixed-reference simplicity over design flexibility. |
Compared with ADS8325IBDRBR and AD7682BCPZ-RL7, ADS8326IBDRBR uniquely balances sub-2mW operation at 100kSPS, pin-selectable shutdown, and 0.1V–VDD reference support - making it optimal for energy-constrained, multi-voltage-sensing applications where power budget and analog interface flexibility are primary constraints.
Availability
ADS8326IBDRBR is available at Aetrix Electronics and suitable for battery-operated systems, isolated data acquisition modules, and simultaneous multichannel industrial controls requiring stable component supply and long-term manufacturability.
Supply support for ADS8326IBDRBR 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, embedded processing, and connectivity technologies, with decades of expertise in precision data converters and industrial-grade ICs.
The ADS8326IBDRBR belongs to TI's precision SAR ADC product line, designed specifically for high-resolution, low-power, and space-constrained measurement applications in portable instrumentation, industrial automation, and condition monitoring systems.
FAQ
What is the maximum sampling rate of the ADS8326IBDRBR at 2.7V supply?
The ADS8326IBDRBR achieves a maximum throughput rate of 200 kSPS when operated at 2.7V supply voltage and 4.8 MHz DCLOCK frequency. This is confirmed in the Electrical Characteristics table under VDD = +2.7V conditions, where conversion time is specified as 3.333 μs (16 DCLOCK cycles) and complete cycle time as 22 DCLOCK cycles - yielding 200 kSPS. The ADS8326IBDRBR maintains full 16-bit performance and no missing codes at this rate.
Does the ADS8326IBDRBR support true differential input operation?
Yes, the ADS8326IBDRBR supports true differential input operation using the +IN and –IN pins. The device accepts differential input voltages from 0 V to VREF, with common-mode range specified from –0.3 V to +0.5 V relative to GND. When –IN is tied to GND, it functions as a unipolar single-ended input. The internal capacitive SAR architecture inherently handles differential sampling without external op-amps or level-shifting circuitry.
What is the power consumption of ADS8326IBDRBR in shutdown mode?
In shutdown mode (CS/SHDN pin held high), the ADS8326IBDRBR draws only 0.6 μW at 5V supply and 0.3 μW at 2.7V supply, as specified in the Electrical Characteristics section. This ultra-low power-down current enables rapid wake-up (<1 μs) and makes the ADS8326IBDRBR ideal for duty-cycled sensor nodes where the ADC remains idle >99% of the time - significantly extending battery life in remote telemetry applications.
Can the ADS8326IBDRBR operate with a 2.5V reference voltage?
Yes, the ADS8326IBDRBR fully supports 2.5V reference voltage, as validated in the VDD = +2.7V electrical characteristics tables where VREF = +2.5V is explicitly used. The reference input accepts any voltage from 0.1V to VDD, and the device maintains ±1.5 LSB INL, 12.2-bit ENOB at 10kHz, and 200 kSPS throughput under these conditions - enabling direct compatibility with standard 2.5V precision references like REF5025.
Is the ADS8326IBDRBR pin-compatible with earlier TI 12-bit ADCs?
Yes, the ADS8326IBDRBR is pin-compatible with ADS7816, ADS7822, ADS7826, ADS7827, ADS7829, ADS8320, and ADS8325 in both MSOP-8 and SON-8 packages. Pin assignments for REF, +IN, –IN, GND, CS/SHDN, DOUT, DCLOCK, and VDD match exactly - allowing drop-in replacement in existing layouts without PCB revision, while upgrading resolution from 12-bit to guaranteed 16-bit no-missing-codes performance.
ADS8326IBDRBR 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:
- -
ADS8326IBDRBR FAQ
1.How can I place an order for ADS8326IBDRBR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8326IBDRBR 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 ADS8326IBDRBR reliable?
The price and inventory of ADS8326IBDRBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8326IBDRBR is usually 5 days.
3.What payment methods are accepted for ADS8326IBDRBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8326IBDRBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8326IBDRBR?
ADS8326IBDRBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8326IBDRBR 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 ADS8326IBDRBR?
For technical support, including ADS8326IBDRBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8326IBDRBR requirements.
6.How does Aetrix verify that ADS8326IBDRBR is sourced from the original manufacturer or authorized distributors?
All ADS8326IBDRBR 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 ADS8326IBDRBR meets industry standards.
7.What is the process for return or replacement of ADS8326IBDRBR?
All ADS8326IBDRBR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8326IBDRBR, 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 ADS8326IBDRBR part is unused and in its original packaging.
Return procedure for ADS8326IBDRBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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