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Texas Instruments ADS8323YB/250G4
- Part No.:
- ADS8323YB/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-TQFP
- Datasheet:
-
ADS8323YB/250G4.pdf
- Description:
- IC ADC 16BIT SAR 32TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,603
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Product details
Overview
ADS8323YB/250G4 from Texas Instruments is a 16-bit, 500kSPS successive approximation register (SAR) analog-to-digital converter with internal 2.5V reference, bipolar differential input range (±2.5V), parallel byte-mode interface, and TQFP-32 package. It delivers 83dB SINAD, 96dB SFDR, and ±6 LSB integral linearity error for high-fidelity data acquisition in motor control and optical monitoring systems.
For engineers reviewing the ADS8323YB/250G4 datasheet, ADS8323YB/250G4 pinout, ADS8323YB/250G4 application, or ADS8323YB/250G4 equivalent, key selection factors include its 500kSPS throughput with 1.6μs conversion time, CMOS-compatible parallel interface supporting 8-/16-bit read modes, and industrial temperature range (–40°C to +85°C) operation with dual 5V analog/digital supplies.
Technical Context
The ADS8323YB/250G4 implements a capacitor-based SAR architecture with integrated sample-and-hold amplifier and internal 2.5V bandgap reference. Its differential input stage supports true bipolar operation (±VREF) with 70dB common-mode rejection at DC and 50dB at 1MHz, enabling accurate measurement of centered signals without external level-shifting circuitry.
Conversion is externally clocked (25kHz–10MHz), initiated by CONVST low pulse, and signaled via BUSY output. Data latching uses asynchronous RD/CS control with BYTE-selectable 8-bit or full 16-bit parallel output in binary two's complement format - eliminating need for external FIFO or timing-critical microcontroller synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - provides 65,536 discrete output codes for sub-100μV voltage resolution with 2.5V reference. |
| Sampling Rate | 500kSPS - enables real-time capture of signals up to 200kHz bandwidth (Nyquist-limited) in closed-loop motor control. |
| INL Error | ±6 LSB - ensures monotonicity and <0.1% full-scale accuracy over temperature without calibration. |
| SINAD | 83 dB at 100kHz - supports >13.5 effective number of bits (ENOB) for precision optical power monitoring. |
| Reference | Internal 2.5V ±0.5% - eliminates external reference component count and reduces board space in ATE systems. |
| Power Dissipation | 125 mW at 500kSPS - enables thermally constrained embedded designs using single 5V supply. |
| Aperture Jitter | 30 ps - limits sampling uncertainty to <0.05 LSB at 100kHz input, critical for spectral purity in FFT-based analysis. |
Pinout & Package
TQFP-32 package (PBS marking), 7mm × 7mm body, 0.5mm lead pitch, exposed thermal pad. Pin 1 marked by dot; pins numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DB0–DB15 | Digital Output (Data Bits) | 16-bit parallel output bus; BYTE pin selects MSB/LSB byte mode for 8-bit host interfaces. |
| CONVST | Digital Input (Control) | Edge-triggered conversion start; falling edge initiates sample-and-hold and conversion sequence. |
| BUSY | Digital Output (Status) | Active-high signal indicates ongoing conversion; synchronizes host read timing without polling overhead. |
| +IN / –IN | Analog Input (Differential) | True bipolar inputs accepting ±2.5V differential range centered on common-mode voltage; rejects noise common to both lines. |
| REFOUT / REFIN | Analog Output/Input (Reference) | Internal 2.5V reference output; shorted to REFIN when using internal reference - no external components required. |
| +AVDD / +DVDD | Power Supply | Separate 4.75–5.25V analog and digital supplies minimize coupling; max 0.3V difference required for spec compliance. |
Key Features
| Feature | Design Value |
|---|---|
| Byte-mode parallel interface | Reduces host MCU I/O count by 50% in 8-bit systems while maintaining full 16-bit resolution via dual-read sequencing. |
| Integrated 2.5V reference | Eliminates external reference IC and associated decoupling, reducing BOM cost and layout complexity in portable ATE equipment. |
| Low aperture jitter (30ps) | Preserves dynamic performance at high input frequencies - enables accurate harmonic analysis in motor current sensing. |
| Bipolar differential input | Accepts ±2.5V signals directly without op-amp level shifters, simplifying front-end design for optical detector biasing circuits. |
| Industrial temperature range | Guarantees 500kSPS operation and ±6 LSB INL across –40°C to +85°C - suitable for under-hood automotive sensors and factory-floor PLC modules. |
Applications
| Motor Control Feedback | Optical Power Monitoring |
|---|---|
Use Scenario: Real-time sampling of phase currents in three-phase BLDC motor drives for field-oriented control (FOC). IC Role / Device Role / Timing Role: High-speed ADC capturing current waveforms at 500kSPS with precise timing alignment via CONVST/BUSY handshake. Use Value: Enables <1μs current loop update rates and <0.1° torque ripple reduction through accurate 16-bit current reconstruction. | Use Scenario: Measuring photodiode output in fiber-optic transceivers to maintain constant optical power output. IC Role / Device Role / Timing Role: Bipolar-input ADC digitizing transimpedance amplifier output with ±2.5V range matching detector swing. Use Value: Delivers 83dB SINAD to resolve <0.01dB power changes - critical for meeting ITU-T G.694.1 wavelength stability specs. |
| Automated Test Equipment | Industrial Data Acquisition |
Use Scenario: Multi-channel voltage/current measurement in PXI-based semiconductor test systems requiring synchronized sampling. IC Role / Device Role / Timing Role: Parallel-output ADC interfaced to FPGA logic for deterministic data capture without USB/FPGA timing bottlenecks. Use Value: 1.6μs conversion time and BYTE-selectable read mode enable 2MSPS aggregate throughput across 4-channel configurations. | Use Scenario: Condition monitoring of vibration sensors in predictive maintenance gateways deployed in harsh factory environments. IC Role / Device Role / Timing Role: Low-power SAR ADC operating from single 5V rail with internal reference, minimizing external components. Use Value: 125mW power dissipation allows continuous 500kSPS operation in sealed enclosures without active cooling. |
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 |
|---|---|---|---|
| ADS8322YB/250 | Same pinout, identical architecture, but lacks internal reference - requires external 2.5V REF. | Used where reference flexibility or higher accuracy external reference is needed; adds BOM and layout complexity. | Select ADS8322YB/250 only if external reference sourcing, drift, or noise requirements exceed internal 2.5V spec. |
| AD7682BCPZ-RL7 | 16-bit, 250kSPS, SPI interface, no internal reference; 10ms power-down recovery vs ADS8323YB's instant wake-up. | Preferred in space-constrained designs needing serial interface; unsuitable for high-throughput parallel-bus systems. | Choose AD7682BCPZ-RL7 when PCB area is critical and system can tolerate lower speed and serial protocol overhead. |
Compared with ADS8323YB/250G4, ADS8322YB/250 trades integrated reference for reference flexibility, while AD7682BCPZ-RL7 sacrifices speed and parallel interface for compactness and SPI compatibility - making ADS8323YB/250G4 optimal for cost-sensitive, high-throughput industrial DAQ where internal reference suffices.
Availability
ADS8323YB/250G4 is available at Aetrix Electronics and suitable for motor control feedback, optical power monitoring, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS8323YB/250G4 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 over 50 years of precision data converter innovation.
The ADS8323YB/250G4 belongs to TI's high-speed precision SAR ADC product line, engineered for industrial and instrumentation applications demanding robust performance, integrated references, and parallel interface simplicity.
FAQ
What is the maximum sampling rate supported by the ADS8323YB/250G4?
The ADS8323YB/250G4 supports a maximum sampling rate of 500kSPS, achieved with a 10MHz external CLOCK input. This rate is guaranteed across the full industrial temperature range (–40°C to +85°C) and requires proper timing adherence to tC1 ≥100ns, tW1/tW2 ≥40ns per the datasheet. At this rate, the ADS8323YB/250G4 achieves 1.6μs conversion time and maintains specified SINAD and SFDR performance.
Does the ADS8323YB/250G4 require an external reference voltage?
No, the ADS8323YB/250G4 includes an internal 2.5V bandgap reference. When using it, connect REFOUT (pin 32) directly to REFIN (pin 31) with a 0.1μF ceramic capacitor to AGND. External references between 1.5V and 2.55V are supported but optional - the internal reference delivers ±0.5% initial accuracy and 25ppm/°C drift, sufficient for most industrial DAQ applications without added component cost.
How does the BYTE pin function on the ADS8323YB/250G4?
The BYTE pin on the ADS8323YB/250G4 configures the 16-bit parallel output bus for 8-bit host systems. When BYTE = LOW, DB15–DB0 present the full 16-bit word. When BYTE = HIGH, DB7–DB0 output the upper byte (DB15–DB8), enabling two sequential reads to reconstruct the full code. This eliminates need for external multiplexing or data-width adaptation logic in legacy 8-bit microcontroller designs interfacing with the ADS8323YB/250G4.
What is the input voltage range specification for the ADS8323YB/250G4?
The ADS8323YB/250G4 accepts a differential analog input range of ±VREF, i.e., ±2.5V when using the internal reference. The common-mode voltage can range from AGND to AVDD, supporting both single-ended (–IN tied to CM) and fully differential configurations. Absolute input limits are AGND – 0.3V to AVDD + 0.3V per pin, with maximum differential voltage capped at VREF (2.5V) - verified in the Electrical Characteristics table under "Full-scale input span" and "Absolute input range".
Is the ADS8323YB/250G4 compatible with 3.3V digital logic levels?
No, the ADS8323YB/250G4 is specified for 5V CMOS logic levels only: VIH = 3.0V min, VIL = 0.8V max, VOH = 4.0V min, VOL = 0.4V max, with DVDD = 4.75–5.25V. Driving its digital inputs (CONVST, RD, CS, BYTE, CLOCK) with 3.3V logic violates the minimum VIH requirement and risks unreliable operation. A level-shifter or 5V-tolerant MCU GPIO is required for interoperability with 3.3V systems - confirmed in the "Digital Input/Output" section of the Electrical Characteristics table.
ADS8323YB/250G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 32-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-TQFP (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8323YB/250G4 FAQ
1.How can I place an order for ADS8323YB/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8323YB/250G4 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 ADS8323YB/250G4 reliable?
The price and inventory of ADS8323YB/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8323YB/250G4 is usually 5 days.
3.What payment methods are accepted for ADS8323YB/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8323YB/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8323YB/250G4?
ADS8323YB/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8323YB/250G4 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 ADS8323YB/250G4?
For technical support, including ADS8323YB/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8323YB/250G4 requirements.
6.How does Aetrix verify that ADS8323YB/250G4 is sourced from the original manufacturer or authorized distributors?
All ADS8323YB/250G4 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 ADS8323YB/250G4 meets industry standards.
7.What is the process for return or replacement of ADS8323YB/250G4?
All ADS8323YB/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS8323YB/250G4, 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 ADS8323YB/250G4 part is unused and in its original packaging.
Return procedure for ADS8323YB/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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