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Texas Instruments ADS8361IDBQG4
- Part No.:
- ADS8361IDBQG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADS8361IDBQG4.pdf
- Description:
- IC ADC 16BIT SAR 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,681
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Product details
Overview
ADS8361IDBQG4 from Texas Instruments is a dual, 16-bit, 500kSPS successive-approximation analog-to-digital converter with four fully differential input channels (A0/A1/B0/B1), simultaneous sampling per channel pair, internal 2.5V reference, and operation over –40°C to +125°C. It delivers 80dB CMRR at 50kHz and supports motor control and multi-axis positioning systems requiring precise phase-coherent acquisition.
For engineers reviewing the ADS8361IDBQG4 datasheet, ADS8361IDBQG4 pinout, ADS8361IDBQG4 application, or ADS8361IDBQG4 equivalent, key selection factors include simultaneous dual-channel 16-bit conversion, 2μs per-channel throughput, SSOP-24 package compatibility with ADS7861, and bipolar differential input support with ±2.5V full-scale range using internal reference.
Technical Context
The ADS8361IDBQG4 implements two independent SAR ADC cores with shared clock and control logic, each paired with a fully differential sample-and-hold amplifier preserving phase alignment between A/B channel pairs. Its architecture enables true simultaneous sampling across CHA0/CHA1 and CHB0/CHB1, with aperture jitter of 50ps and aperture delay matching of 100ps.
It features a flexible dual serial interface (Serial Data A/B) configurable via M0/M1/A0 pins for two-channel (A0/B0 or A1/B1) or four-channel sequential operation, with BUSY output indicating conversion status and RD synchronizing data readout. Internal 2.5V reference provides ±1% initial accuracy and ±20ppm/°C drift, usable directly via REFIN–REFOUT loop or replaced by external 1.2V–2.6V source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 76μV LSB step size with 2.5V reference, enabling sub-millivolt precision in industrial sensing. |
| Throughput Rate | 500kSPS total - achieves 2μs per channel (4μs for all four), supporting real-time closed-loop control at ≤200kHz signal bandwidth. |
| Input Configuration | 4 fully differential channels (A0+/A0−, A1+/A1−, B0+/B0−, B1+/B1−) - maintains 80dB CMRR at 50kHz for noise-immune acquisition in motor drive environments. |
| Reference | Internal 2.5V ±1% - eliminates external reference component count; buffered output supplies ≤10μA while maintaining <12μVrms noise (10Hz–10kHz). |
| Power Dissipation | 150mW at BVDD = 3V - enables thermally constrained designs in compact motor control modules without active cooling. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive motor control and industrial inverters with extended thermal cycling requirements. |
| INL Error | ±8 LSB max - ensures monotonicity and <0.012% full-scale linearity error across temperature, critical for position feedback accuracy. |
Pinout & Package
ADS8361IDBQG4 is packaged in SSOP-24 (DBQ), a 24-pin shrink small-outline package with 0.65mm pitch, optimized for high-density PCB layouts and compatible with ADS7861 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH A0+, CH A0− | Differential Input Channel A0 | Accepts ±2.5V bipolar signal centered at 2.5V common-mode; matched impedance critical for <1mV gain/offset drift. |
| CH A1+, CH A1− | Differential Input Channel A1 | Second A-pair input; sampled simultaneously with A0 for multi-phase current sensing in 3-phase systems. |
| CH B0+, CH B0− | Differential Input Channel B0 | Independent B-pair input; used with A0 for dual-axis position feedback or torque/speed cross-validation. |
| CH B1+, CH B1− | Differential Input Channel B1 | Second B-pair input; enables four-sensor acquisition (e.g., dual encoder + dual current) without multiplexing latency. |
| CONVST | Conversion Start Trigger | Edge-sensitive control initiating simultaneous hold on all four inputs; minimum 15ns pulse width required for deterministic timing. |
| SERIAL DATA A / B | CMOS Serial Output | 16-bit two's complement data streams; M1 pin selects dual-output (A/B) or single-output (A-only) mode for host interface flexibility. |
| REFIN / REFOUT | Reference Interface | Direct connection forms internal 2.5V reference loop; open-circuit allows external reference injection with 100MΩ input resistance. |
| M0, M1, A0 | Mode Configuration Inputs | Set operation mode: two-channel (A0/B0 or A1/B1) or four-channel sequential; no external programming required. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous Sampling | True concurrent acquisition on A0/A1 and B0/B1 pairs preserves phase coherence for vector control algorithms in servo drives. |
| Internal Reference Buffer | 2.5V output stable to ±20ppm/°C with <12μVrms noise enables high-SNR measurements without external op-amp buffering. |
| Flexible Serial Interface | Dual-output mode (M1 = LOW) delivers A- and B-channel data in parallel, halving host processor read latency versus time-multiplexed alternatives. |
| Pin Compatibility | SSOP-24 footprint matches ADS7861, allowing 16-bit upgrade path without PCB redesign or layout changes. |
| Bipolar Input Support | ±2.5V differential range referenced to internal 2.5V allows direct interface to isolated current sensors and resolver outputs without level-shifting circuitry. |
Applications
| Motor Control | Multi-Axis Positioning Systems |
|---|---|
Use Scenario: Real-time current sensing in three-phase BLDC motor inverters with field-oriented control. IC Role / Device Role / Timing Role: Simultaneously samples phase A and B currents (A0/A1) and DC bus voltage (B0/B1) at 500kSPS to compute torque vector and detect overcurrent faults within 2μs. Use Value: Aperture jitter <50ps and channel-to-channel isolation >96dB prevent cross-talk-induced torque ripple, improving efficiency by ≥1.2% at full load. | Use Scenario: Coordinated motion control of X-Y-Z linear stages in semiconductor lithography equipment. IC Role / Device Role / Timing Role: Acquires encoder quadrature signals and load-cell feedback from four axes concurrently to synchronize stage movement with <100ps timing skew. Use Value: Simultaneous sampling eliminates phase misalignment errors, reducing positional error from ±1.8μm to ±0.3μm across 100mm travel range. |
| 3-Phase Power Control | Industrial Servo Drives |
Use Scenario: Grid-tied solar inverter monitoring AC line voltage, current, and DC link voltage for MPPT and anti-islanding protection. IC Role / Device Role / Timing Role: Samples all three parameters (A0/A1/B0) in two-channel mode with 2μs per acquisition to capture transient grid events at 50/60Hz fundamental. Use Value: 80dB CMRR at 50kHz rejects EMI from IGBT switching, ensuring accurate RMS calculation even during 10kV/μs dv/dt transients. | Use Scenario: High-bandwidth torque loop closure in robotic joint actuators using dual current feedback and back-EMF estimation. IC Role / Device Role / Timing Role: Converts motor phase currents (A0/B0) and rotor position (A1/B1) simultaneously to compute instantaneous torque angle with zero phase lag. Use Value: Integral linearity match ≤4 LSB between A0/B0 channels ensures torque command fidelity to ±0.05% full scale, meeting ISO 10218-1 safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8361IRHBT | Same core specs but in QFN-32 (5×5mm) package with thermal pad; RθJA = 36.7°C/W vs 88°C/W for SSOP-24. | Better thermal performance for high-density power electronics; requires different PCB footprint and reflow profile. | Select when board space is constrained and junction temperature must stay <105°C at 150mW dissipation. |
| ADS8327IPW | Single 16-bit 500kSPS SAR ADC in TSSOP-28; no simultaneous sampling, no internal reference, requires external 2.5V ref. | Lacks dual-channel synchronization and integrated reference; suitable only for non-phase-critical single-sensor applications. | Choose only if cost reduction outweighs loss of simultaneous acquisition and reference integration. |
Compared with ADS8361IRHBT, ADS8361IDBQG4 offers identical electrical performance in a legacy-compatible SSOP-24 package ideal for drop-in upgrades from ADS7861, while ADS8327IPW sacrifices synchronization and reference integration for lower unit cost in simpler measurement tasks.
Availability
ADS8361IDBQG4 is available at Aetrix Electronics and suitable for motor control, multi-axis positioning systems, and 3-phase power control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS8361IDBQG4 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 IC design.
The ADS8361 product line targets high-fidelity, phase-coherent acquisition in real-time control systems-designed specifically for motor drives, robotics, and energy infrastructure where simultaneous sampling and thermal robustness are mandatory.
FAQ
What is the maximum sampling rate supported by the ADS8361IDBQG4?
The ADS8361IDBQG4 supports a maximum throughput rate of 500kSPS across all four channels, achieved with a 10MHz external clock (fCLK/20). Each individual channel completes conversion in 2μs, and the full four-channel sequence takes 4μs. This rate is guaranteed over the full –40°C to +125°C operating range with AVDD = 5V and BVDD = 3V or 5V, as verified in the SBAS230E datasheet timing tables.
Does the ADS8361IDBQG4 require an external reference voltage?
No, the ADS8361IDBQG4 includes an internal 2.5V reference with ±1% initial accuracy and ±20ppm/°C temperature drift, accessible via REFOUT and usable directly by connecting REFOUT to REFIN. An external reference (1.2V–2.6V) may be applied to REFIN if higher precision or different full-scale range is needed, but it is not required for standard operation. The internal reference supports ≤10μA load current.
How does the ADS8361IDBQG4 achieve simultaneous sampling across multiple channels?
The ADS8361IDBQG4 uses two independent sample-and-hold amplifiers-one for Channel A (A0/A1) and one for Channel B (B0/B1)-each capturing its pair of differential inputs at the exact moment CONVST transitions HIGH. This hardware-level synchronization ensures phase coherence between A- and B-pair acquisitions, with aperture delay matching specified at 100ps. No software coordination or timing calibration is needed to maintain this simultaneity.
Is the ADS8361IDBQG4 pin-compatible with the ADS7861?
Yes, the ADS8361IDBQG4 in SSOP-24 (DBQ) package is explicitly designed as a pin-compatible 16-bit upgrade to the 12-bit ADS7861. All signal, power, and ground pins align identically, allowing direct replacement on existing PCBs without layout modification. Functional enhancements-including higher resolution, simultaneous sampling, and internal reference-require only firmware updates to leverage the improved performance.
What digital interface options does the ADS8361IDBQG4 support?
The ADS8361IDBQG4 supports a flexible CMOS serial interface with two independent data outputs (Serial Data A and Serial Data B), configurable via M1 pin. When M1 = LOW, both outputs deliver 16-bit two's complement data for their respective channels in parallel. When M1 = HIGH, Serial Data A carries interleaved A/B channel data while Serial Data B enters high-impedance state-reducing host interface complexity in resource-constrained controllers.
ADS8361IDBQG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 4
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V, 5V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 24-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8361IDBQG4 FAQ
1.How can I place an order for ADS8361IDBQG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8361IDBQG4 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 ADS8361IDBQG4 reliable?
The price and inventory of ADS8361IDBQG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8361IDBQG4 is usually 5 days.
3.What payment methods are accepted for ADS8361IDBQG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8361IDBQG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8361IDBQG4?
ADS8361IDBQG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8361IDBQG4 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 ADS8361IDBQG4?
For technical support, including ADS8361IDBQG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8361IDBQG4 requirements.
6.How does Aetrix verify that ADS8361IDBQG4 is sourced from the original manufacturer or authorized distributors?
All ADS8361IDBQG4 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 ADS8361IDBQG4 meets industry standards.
7.What is the process for return or replacement of ADS8361IDBQG4?
All ADS8361IDBQG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS8361IDBQG4, 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 ADS8361IDBQG4 part is unused and in its original packaging.
Return procedure for ADS8361IDBQG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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