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Texas Instruments ADS8326IDGKR
- Part No.:
- ADS8326IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS8326IDGKR.pdf
- Description:
- IC ADC 16BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,801
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Product details
Overview
ADS8326IDGKR 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/100kSPS). It delivers ±1.5LSB max INL, 14.35-bit ENOB at 10kHz, and operates from 2.7V to 5.5V supply - enabling high-precision data acquisition in battery-powered remote sensors and isolated industrial monitoring systems.
For engineers reviewing the ADS8326IDGKR datasheet, ADS8326IDGKR pinout, ADS8326IDGKR application, or ADS8326IDGKR equivalent, key selection considerations include its MSOP-8 package, 200kSPS throughput at 2.7V, differential input range up to VREF, programmable reference (0.1V to VDD), and power-down mode consuming only 0.3μW.
Technical Context
The ADS8326IDGKR implements a capacitive redistribution SAR architecture with integrated sample-and-hold, supporting true differential analog inputs (+IN/–IN) referenced to an externally supplied voltage (0.1V to VDD). Its conversion is clocked by an external DCLOCK signal (24kHz–4.8MHz), requiring exactly 22 cycles for full 16-bit output.
It features CMOS/LVCMOS-compatible digital I/O, CS/SHDN dual-function pin for chip select or shutdown control, and DOUT with tri-state capability synchronized to DCLOCK falling edge. The device maintains 16-bit no-missing-codes performance across –40°C to +85°C and full supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonic transfer function and no missing codes over full temperature and supply range. |
| Throughput Rate | 200 kSPS at 2.7V - enables real-time sampling of vibration, motor current, or sensor signals without oversampling penalty. |
| INL / DNL | ±1.5 LSB max / ±1 LSB max - ensures accurate representation of linear transducer outputs and control loop feedback. |
| Power Dissipation | 2 mW at 2.7V/100kSPS - supports multi-year battery life in wireless sensor nodes and portable instrumentation. |
| Reference Range | 0.1 V to VDD - allows flexible scaling: e.g., 2.5V ref for 0–2.5V sensor output or 5V ref for 0–5V industrial signal. |
| Interface | SPI/SSI-compatible serial - simplifies host MCU integration using standard peripheral libraries without custom logic. |
| Supply Range | 2.7 V to 5.5 V - interoperates with both 3.3V and 5V system rails, eliminating level-shifting in mixed-voltage designs. |
Pinout & Package
ADS8326IDGKR is housed in an MSOP-8 package (DGK), 3.0 mm × 3.0 mm × 1.0 mm, with exposed thermal pad internally connected to substrate (recommended to connect to analog ground).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF | Reference input | Accepts external voltage (0.1V–VDD); sets full-scale range; high impedance (5 GΩ) minimizes loading on precision reference ICs. |
| +IN | Analog input (noninverting) | Differential input node; sampled via internal capacitor array; supports common-mode range from –0.3V to 0.5V. |
| –IN | Analog input (inverting) | Differential input node; complements +IN; enables rejection of noise coupled equally to both traces. |
| GND | Ground | Analog ground reference; must be separated from digital ground to preserve 91.5 dB SNR performance. |
| CS/SHDN | Digital input | Active-low chip select; driven high to enter 0.3 μW power-down mode - critical for duty-cycled sensing. |
| DOUT | Digital output | MSB-first serial data; tri-states when CS high; timing aligned to DCLOCK falling edge (tEN = 20–50 ns). |
| DCLOCK | Digital input | Asynchronous master clock; controls conversion speed and data rate; min pulse width 200 ns. |
| VDD | Power supply | Single supply (2.7–5.5V); powers analog core and digital interface; decoupling required per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit no missing codes | Guaranteed over –40°C to +85°C and full supply range (2.7V–5.5V), ensuring reliable code coverage in safety-critical measurements. |
| MicroPower at low throughput | 0.2 mW average at 10 kHz sampling - achieved by deep power-down between conversions, ideal for energy-constrained IoT endpoints. |
| Differential input architecture | Rejects common-mode noise (e.g., EMI, ground bounce) and enables direct connection to bridge sensors or isolated amplifiers. |
| Flexible reference input | Supports 0.1V–VDD range, allowing use of low-dropout references (e.g., REF3025) or rail-to-rail buffered DAC outputs as VREF. |
| Pin compatibility | Direct replacement for ADS7816, ADS7822, ADS7826, ADS7827, ADS7829, ADS8320, and ADS8325 - simplifies upgrade paths in legacy designs. |
Applications
| Battery-Powered Remote Sensor Node | Isolated Industrial Current Monitoring |
|---|---|
|
Use Scenario: Wireless temperature/humidity node powered by CR2032 battery, transmitting data every 5 seconds via BLE. IC Role / Device Role / Timing Role: ADC digitizes conditioned sensor output; low 2mW active power and 0.3μW shutdown enable >5-year battery life. Use Value: Eliminates need for external power management ICs; differential input rejects PCB-level noise in compact enclosure. |
Use Scenario: DIN-rail mounted power meter measuring motor phase currents using isolated shunt amplifiers. IC Role / Device Role / Timing Role: Digitizes amplified shunt voltage with 16-bit resolution; SPI interface connects to isolated MCU via digital isolator. Use Value: ±1.5 LSB INL ensures <0.1% measurement error across 40–70°C ambient; 200kSPS captures transient overcurrent events. |
| Multi-Channel Simultaneous Sampling System | Portable Vibration Analysis Instrument |
|
Use Scenario: 8-channel data logger acquiring accelerometer, strain gauge, and thermocouple signals synchronously. IC Role / Device Role / Timing Role: One ADS8326IDGKR per channel; shared DCLOCK and CS lines enable deterministic inter-channel timing alignment. Use Value: Identical conversion latency (2.667 μs at 5V) eliminates skew; MSOP-8 footprint minimizes board area vs. larger alternatives. |
Use Scenario: Handheld analyzer capturing bearing vibration spectra (0–10 kHz) using piezoelectric accelerometers. IC Role / Device Role / Timing Role: ADC samples conditioned analog signal at 200kSPS; 14.35-bit ENOB preserves dynamic range for FFT-based fault detection. Use Value: 91.5 dB SNR and –91 dB THD at 10 kHz enable detection of sub-millig acceleration harmonics in noisy factory environments. |
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 |
|---|---|---|---|
| ADS8325IDGKR | Same 16-bit SAR architecture and MSOP-8 package, but fixed 5V-only supply (4.5–5.5V) and no 2.7V operation. | Not suitable for battery-powered systems below 4.5V; lacks low-voltage flexibility of ADS8326IDGKR. | Select ADS8325IDGKR only if system uses stable 5V rail and requires identical performance at higher supply. |
| ADS8860IDRCT | 16-bit SAR in 3mm × 3mm WSON-10; supports 2.7–3.6V only; 1MSPS throughput; SPI interface; no power-down mode. | Higher speed but no ultra-low-power shutdown; different pinout and package prevent drop-in replacement. | Choose ADS8860IDRCT when sampling rate >200kSPS is mandatory and power budget allows ~3.5mW continuous draw. |
Compared with ADS8325IDGKR and ADS8860IDRCT, the ADS8326IDGKR uniquely balances wide supply range (2.7–5.5V), sub-microwatt shutdown, and pin compatibility with legacy TI 12/16-bit converters - making it optimal for cost-sensitive, battery-aware industrial upgrades.
Availability
ADS8326IDGKR is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition modules, and isolated industrial monitoring requiring stable component supply and long-term manufacturability.
Supply support for ADS8326IDGKR 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 ADS8326IDGKR belongs to TI's precision SAR ADC product line, designed specifically for high-resolution, low-power data acquisition in portable, remote, and isolated measurement systems where accuracy, size, and energy efficiency are critical.
FAQ
What is the maximum sampling rate of the ADS8326IDGKR at 2.7V supply?
The ADS8326IDGKR 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 "Throughput rate" is specified as 200 kSPS. At this rate, power dissipation remains at 3.73–5.4 mW, supporting efficient high-speed acquisition in low-voltage systems.
Does the ADS8326IDGKR support true differential input operation?
Yes, the ADS8326IDGKR supports true differential input operation between the +IN and –IN pins. Its analog input stage accepts a differential signal with full-scale range of 0 to VREF and common-mode range of –0.3V to +0.5V. This architecture provides inherent common-mode noise rejection, essential for accurate measurements in electrically noisy industrial environments - a capability explicitly verified in the "Analog Input" section of the datasheet.
Can the ADS8326IDGKR operate with a 2.5V reference voltage?
Yes, the ADS8326IDGKR fully supports a 2.5V reference voltage. The datasheet specifies that the reference input voltage range is 0.1V to VDD, and all AC/DC performance metrics (including ENOB, SNR, and INL) are characterized at VREF = 2.5V under 2.7V supply conditions. This makes it compatible with standard 2.5V precision references like REF3025 or buffered DAC outputs.
What is the power consumption of the ADS8326IDGKR in shutdown mode?
The ADS8326IDGKR consumes only 0.3 μW in shutdown mode when VDD = 2.7V and CS/SHDN is driven high. This ultra-low quiescent power is measured as power dissipation in power-down (0.3 μW at 2.7V, CS = VDD), enabling multi-year operation in wake-on-event sensor systems. The value is explicitly listed in the "ELECTRICAL CHARACTERISTICS" table under VDD = +2.7V conditions.
Is the ADS8326IDGKR pin-compatible with the ADS7822?
Yes, the ADS8326IDGKR is pin-compatible with the ADS7822, as confirmed in the "FEATURES" section of the datasheet: "Pin-Compatible with the ADS7816, ADS7822, ADS7826, ADS7827, ADS7829, ADS8320, and ADS8325". Both devices use the same MSOP-8 (DGK) package and identical pin assignments (REF, +IN, –IN, GND, CS/SHDN, DOUT, DCLOCK, VDD), enabling direct hardware replacement without PCB modification.
ADS8326IDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8326IDGKR FAQ
1.How can I place an order for ADS8326IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8326IDGKR 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 ADS8326IDGKR reliable?
The price and inventory of ADS8326IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8326IDGKR is usually 5 days.
3.What payment methods are accepted for ADS8326IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8326IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8326IDGKR?
ADS8326IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8326IDGKR 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 ADS8326IDGKR?
For technical support, including ADS8326IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8326IDGKR requirements.
6.How does Aetrix verify that ADS8326IDGKR is sourced from the original manufacturer or authorized distributors?
All ADS8326IDGKR 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 ADS8326IDGKR meets industry standards.
7.What is the process for return or replacement of ADS8326IDGKR?
All ADS8326IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8326IDGKR, 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 ADS8326IDGKR part is unused and in its original packaging.
Return procedure for ADS8326IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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