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Texas Instruments ADS8322YB/2KG4
- Part No.:
- ADS8322YB/2KG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-TQFP
- Datasheet:
-
ADS8322YB/2KG4.pdf
- Description:
- IC ADC 16BIT SAR 32TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,057
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Product details
Overview
ADS8322YB/2KG4 from Texas Instruments is a 16-bit, 500kHz successive approximation register (SAR) analog-to-digital converter with integrated 2.5V reference, unipolar input range (0 to +2VREF), ±6 LSB integral linearity error, and TQFP-32 package. It delivers 81 dB SINAD and 94 dB SFDR at 100 kHz input, targeting high-speed data acquisition in medical CT scanners and precision test instrumentation.
For engineers reviewing the ADS8322YB/2KG4 datasheet, ADS8322YB/2KG4 pinout, ADS8322YB/2KG4 application, or ADS8322YB/2KG4 equivalent, this page provides verified technical context, validated pin functions, confirmed timing behavior (1.6 μs conversion time, 350 ns acquisition), and real-world application constraints including ±0.1 V to +0.5 V –IN voltage limit and 25 pF analog input capacitance.
Technical Context
The ADS8322YB/2KG4 implements a capacitor-based SAR architecture with inherent sample-and-hold, driven by an external CMOS-compatible clock (10 MHz max). Its internal 2.5V bandgap reference is double-buffered and supports external reference operation from 1.5 V to 2.6 V via REFIN.
Conversion is initiated by CONVST low pulse (≥20 ns), with BUSY high during the 16-clock-cycle process. Data output uses either full 16-bit parallel (DB15–DB0) or byte-mode (BYTE-controlled DB7–DB0 for LSBs/MSBs), both requiring active-low CS and RD for bus enable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1 LSB = 76 µV step size with 2.5 V reference |
| Sampling Rate | 500 kHz - enables 2 µs maximum throughput cycle for real-time acquisition |
| Integral Linearity | ±6 LSB - ensures monotonicity and <0.1% full-scale error across temperature |
| SINAD | 83 dB typical at 100 kHz - supports >13.5 ENOB for precision signal capture |
| Power Dissipation | 85 mW at 500 kHz - enables micro-power operation in thermally constrained systems |
| Analog Input Range | 0 to +2VREF (0 to +5 V) - unipolar span compatible with buffered sensor outputs |
| Reference Voltage | Internal 2.5 V ±0.5% - eliminates external reference component count and layout complexity |
Pinout & Package
TQFP-32 (PBS) package with 0.8 mm pitch, exposed thermal pad, and industrial –40°C to +85°C operating range. Pin 1 marked by corner notch; pin 1 quadrant Q2 per tape reel specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DB15–DB0 | Parallel digital output bus | 16-bit straight-binary data; 3-state enabled only when CS and RD are low |
| CONVST | Conversion start trigger | Falling-edge initiated; must be low ≥20 ns to begin sample-to-hold transition |
| BUSY | Conversion status indicator | Active-high open-drain output signaling ongoing conversion (1.6 µs duration) |
| BYTE | Output byte select control | Low = DB15–DB0 valid; High = DB7–DB0 carry MSBs (D15–D8) for 8-bit interface mode |
| REFOUT / REFIN | Reference buffer I/O | REFOUT supplies internal 2.5 V; tie directly to REFIN when using internal reference |
| +IN / –IN | Differential analog input | +IN range: –0.1 V to VA+0.1 V; –IN range: –0.1 V to +0.5 V - defines unipolar input compliance |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2.5 V reference | Eliminates external reference IC and reduces BOM count while maintaining ±20 ppm/°C drift |
| Byte-mode parallel interface | Enables 8-bit microcontroller interfacing without data multiplexing or glue logic |
| Low aperture jitter (20 ps) | Preserves SNR in high-frequency sampling applications such as ultrasound front-ends |
| On-chip sample-and-hold | Removes need for external S/H amplifier; supports full 500 kHz throughput with 350 ns acquisition |
| CMOS-compatible timing | Accepts standard 5 V logic levels (VIH ≥3.0 V, VIL ≤0.8 V) and drives TTL loads directly |
Applications
| CT Scanner Signal Chain | High-Speed Test Instrumentation |
|---|---|
Use Scenario: Digitizing X-ray detector analog outputs in multi-slice computed tomography systems requiring sub-µs timing alignment and low harmonic distortion. IC Role / Device Role / Timing Role: Primary ADC capturing 16-bit projection data at 500 kHz with synchronized CONVST/CLOCK triggering and BUSY-driven DMA handshaking. Use Value: 94 dB SFDR prevents spectral leakage from adjacent detector channels; ±6 LSB INL ensures accurate Hounsfield unit calibration across temperature. |
Use Scenario: Embedded digitization in automated test equipment (ATE) for semiconductor parametric testing where fast settling and repeatable code transitions are critical. IC Role / Device Role / Timing Role: Standalone acquisition node interfaced to FPGA logic via parallel DBx bus, using BYTE mode for resource-constrained control paths. Use Value: 1.6 µs conversion time enables tight loop closure; 25 pF input capacitance allows direct connection to low-Z op-amp buffers without external RC filtering. |
| Medical Ultrasound Beamformer | Precision Industrial DAQ |
Use Scenario: Channel-level digitization in portable ultrasound systems requiring low power, high dynamic range, and minimal board space. IC Role / Device Role / Timing Role: Analog front-end ADC converting echo return signals with 83 dB SINAD to preserve tissue contrast resolution. Use Value: 20 ps aperture jitter maintains time-of-flight accuracy; internal 2.5 V reference removes calibration dependency on external components. |
Use Scenario: Modular data acquisition modules for factory-floor vibration monitoring, where long-term gain stability and noise floor consistency are mandatory. IC Role / Device Role / Timing Role: Core ADC in isolated analog input stage, referenced to internal 2.5 V and powered from split 5 V analog/digital rails. Use Value: ±0.22% FSR gain error and ±0.5 mV offset error ensure <0.01% measurement repeatability over –40°C to +85°C without recalibration. |
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 |
|---|---|---|---|
| ADS8325IPWR | 16-bit, 1 MSPS, no internal reference, requires external 2.5 V reference | Higher throughput but adds reference IC, bypassing, and layout complexity | Select when >500 kHz sampling is required and reference design flexibility is prioritized |
| AD7682BCPZ-RL7 | 16-bit, 250 kSPS, internal reference, SPI interface, smaller LFCSP-20 package | Lower speed, serial interface, reduced pin count - trades parallel bandwidth for space savings | Select for space-constrained embedded systems where 250 kSPS suffices and PCB area is premium |
Compared with ADS8322YB/2KG4, ADS8325IPWR offers higher speed but increases system component count and layout sensitivity, while AD7682BCPZ-RL7 reduces footprint and simplifies routing at the cost of halved throughput and loss of parallel bus determinism.
Availability
ADS8322YB/2KG4 is available at Aetrix Electronics and suitable for CT scanner signal chains, high-speed test instrumentation, medical ultrasound beamformers, and precision industrial DAQ systems requiring stable component supply across extended product lifecycles.
Supply support for ADS8322YB/2KG4 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 high-performance data converters with over 50 years of precision ADC innovation.
The ADS8322YB/2KG4 belongs to TI's precision SAR ADC portfolio, designed specifically for high-throughput, low-noise industrial and medical data acquisition where internal reference integration, deterministic parallel timing, and guaranteed industrial temperature operation are essential.
FAQ
What is the maximum clock frequency supported by the ADS8322YB/2KG4?
The ADS8322YB/2KG4 supports an external CLOCK input up to 10 MHz, which corresponds to its maximum 500 kHz sampling rate. The minimum clock period is 100 ns, with HIGH and LOW times each ≥40 ns. Operation below 25 kHz (1.25 kHz throughput) is permitted for ultra-low-power modes, but the device requires 16 clock edges per conversion regardless of frequency.
Does the ADS8322YB/2KG4 require an external reference voltage?
No - the ADS8322YB/2KG4 includes an internal 2.5 V bandgap reference. When used, REFIN must be tied directly to REFOUT with a 0.1 µF ceramic capacitor on REFOUT. An external reference between 1.5 V and 2.6 V may be applied to REFIN if higher accuracy or different full-scale range is needed, but the internal reference remains disabled in that configuration.
How does the BYTE pin affect data readout on the ADS8322YB/2KG4?
When BYTE is low, the full 16-bit result appears on DB15–DB0 simultaneously. When BYTE is high, DB7–DB0 output the most significant 8 bits (D15–D8); the least significant 8 bits (D7–D0) were previously available on the same pins when BYTE was low. Two consecutive RD pulses (with BYTE toggled) are required to read the complete word in byte mode.
What are the absolute voltage limits on the –IN pin of the ADS8322YB/2KG4?
The –IN pin of the ADS8322YB/2KG4 must remain within –0.1 V to +0.5 V relative to GND under all operating conditions. Exceeding this range - especially going below GND or above +0.5 V - degrades linearity and may cause non-monotonic behavior. This constraint defines the unipolar input architecture and must be enforced by front-end signal conditioning.
Is the ADS8322YB/2KG4 pin-compatible with the ADS8322Y variant?
Yes - ADS8322YB/2KG4 and ADS8322Y share identical TQFP-32 (PBS) packaging, pinout, and electrical interface. The primary difference is performance grade: ADS8322YB specifies ±6 LSB integral linearity and ±3 LSB offset error, while ADS8322Y specifies ±8 LSB INL and ±2 mV offset. Both operate identically in circuit and require no PCB changes for substitution.
ADS8322YB/2KG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 32-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential, Single Ended
- 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:
- -
ADS8322YB/2KG4 FAQ
1.How can I place an order for ADS8322YB/2KG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8322YB/2KG4 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 ADS8322YB/2KG4 reliable?
The price and inventory of ADS8322YB/2KG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8322YB/2KG4 is usually 5 days.
3.What payment methods are accepted for ADS8322YB/2KG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8322YB/2KG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8322YB/2KG4?
ADS8322YB/2KG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8322YB/2KG4 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 ADS8322YB/2KG4?
For technical support, including ADS8322YB/2KG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8322YB/2KG4 requirements.
6.How does Aetrix verify that ADS8322YB/2KG4 is sourced from the original manufacturer or authorized distributors?
All ADS8322YB/2KG4 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 ADS8322YB/2KG4 meets industry standards.
7.What is the process for return or replacement of ADS8322YB/2KG4?
All ADS8322YB/2KG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS8322YB/2KG4, 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 ADS8322YB/2KG4 part is unused and in its original packaging.
Return procedure for ADS8322YB/2KG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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