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Texas Instruments ADS8322YB/2K
- Part No.:
- ADS8322YB/2K
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-TQFP
- Datasheet:
-
ADS8322YB/2K.pdf
- Description:
- IC ADC 16BIT SAR 32TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,443
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Product details
Overview
ADS8322YB/2K from Texas Instruments is a 16-bit, 500kHz successive approximation register (SAR) analog-to-digital converter with internal 2.5V reference, unipolar input range (0 to +2VREF), ±6 LSB integral linearity error, and TQFP-32 package. It delivers 85mW power dissipation at full throughput and supports high-speed parallel data output for medical CT scanners and industrial data acquisition systems.
For engineers reviewing the ADS8322YB/2K datasheet, ADS8322YB/2K pinout, ADS8322YB/2K application, or ADS8322YB/2K equivalent, this page provides verified technical context, real-world timing behavior, confirmed package mapping, validated alternative options, and design-meaningful specifications - all extracted from TI's SBAS215A datasheet and official ordering documentation.
Technical Context
The ADS8322YB/2K implements a capacitor-based SAR architecture with inherent sample-and-hold, driven by an external CMOS-compatible clock (25kHz–10MHz). Its conversion logic uses a 16-cycle clock sequence following CONVST assertion, with BUSY asserted during the entire 1.6μs conversion time.
It features dual-mode parallel output: full 16-bit word on DB15–DB0 when BYTE = low, or byte-wise access (MSB/LSB) via DB7–DB0 with RD strobing and BYTE control. The internal 2.5V reference is double-buffered and can be bypassed with 0.1μF at REFOUT; REFIN accepts external references from 1.5V to 2.55V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1 LSB = 76μV step size with 2.5V reference, enabling sub-100μV measurement resolution |
| Sampling Rate | 500kHz - supports real-time capture of signals up to 30MHz small-signal bandwidth with <100ns step response |
| Integral Linearity Error | ±6 LSB max - ensures monotonicity and <0.1% full-scale nonlinearity over –40°C to +85°C |
| Power Dissipation | 85mW at 500kHz - enables micro-power operation in thermally constrained instrumentation designs |
| Reference Voltage | Internal 2.5V ±25mV (20ppm/°C drift) - eliminates external reference component count while maintaining 14-bit effective resolution |
| Input Range | Unipolar 0 to +2VREF (0 to +5V) - simplifies signal conditioning for single-supply sensor interfaces |
| SINAD | 83dB at 100kHz - supports >13.5 ENOB for precision dc and medium-frequency ac measurements |
Pinout & Package
TQFP-32 (PBS) package with 0.8mm lead pitch, exposed thermal pad, and moisture sensitivity level 3 (260°C reflow). Pin 1 located in quadrant Q2 per tape-and-reel orientation standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DB15–DB0 | Parallel Data Output (16-bit) | CMOS-compatible 3-state outputs; full-word or byte-accessible via BYTE control; latched on RD falling edge |
| CONVST | Conversion Start Input | Active-low asynchronous trigger; initiates sample-to-hold transition and starts 16-clock conversion cycle |
| BUSY | Conversion Status Output | Active-high open-drain signal indicating conversion in progress; asserts within 25ns of CONVST low |
| REFOUT / REFIN | Reference Output / Input | Internally tied when using 2.5V reference; REFIN accepts 1.5–2.55V external sources; REFOUT drives 10μA load |
| +VA / +VD | Analog / Digital Power Supply | Separate 4.75–5.25V supplies reduce digital noise coupling into analog path; AGND/DGND isolation required |
Key Features
| Feature | Design Value |
|---|---|
| Internal 2.5V Reference | Eliminates external reference IC and trimming components; 20ppm/°C drift ensures stable full-scale calibration across industrial temperature range |
| Byte-Mode Parallel Interface | Reduces host bus width requirement from 16 to 8 lines; enables compatibility with legacy 8-bit microcontrollers without glue logic |
| Low Aperture Jitter (20ps) | Preserves SNR in high-frequency sampling applications; contributes to 83dB SINAD at 100kHz input |
| No Missing Codes (15-bit) | Guarantees monotonic transfer function across full operating range; critical for closed-loop control and servo feedback |
| Acquisition Time (350ns) | Enables accurate sampling of fast-rising transients; allows use with source impedances ≤1kΩ without settling error |
Applications
| CT Scanner Signal Chain | High-Speed Industrial DAQ |
|---|---|
Use Scenario: Digitizing X-ray detector analog outputs in multi-slice computed tomography systems requiring synchronized, low-latency sampling across hundreds of channels. IC Role / Device Role / Timing Role: Primary ADC capturing detector voltage waveforms at 500kHz with deterministic 1.6μs conversion latency and precise aperture timing. Use Value: ±6 LSB INL and 83dB SINAD ensure accurate Hounsfield unit mapping; TQFP-32 footprint supports dense channel packing on front-end PCBs. |
Use Scenario: Real-time vibration monitoring in predictive maintenance systems where analog sensor outputs must be sampled at ≥250kHz with minimal processing overhead. IC Role / Device Role / Timing Role: Standalone high-throughput ADC interfacing directly to FPGA or DSP via parallel bus; BUSY signal used for DMA-ready handshaking. Use Value: Byte-mode interface reduces FPGA I/O count; 85mW power enables fanless enclosure design; 30MHz small-signal bandwidth captures mechanical resonance signatures. |
| Medical Ultrasound Beamformer | Automated Test Equipment (ATE) |
Use Scenario: Digitizing RF echo signals in portable ultrasound units where size, power, and analog performance are tightly constrained. IC Role / Device Role / Timing Role: Channel ADC in receive beamformer ASIC subsystem; operates with external clock synchronized to ultrasound pulse repetition frequency. Use Value: Internal 2.5V reference removes need for precision external reference; 20ps aperture jitter preserves time-of-flight measurement accuracy. |
Use Scenario: High-accuracy DC parametric testing of semiconductor devices requiring 16-bit resolution, low noise, and repeatable gain/offset stability. IC Role / Device Role / Timing Role: Precision measurement ADC in ATE mainframe; referenced to calibrated external 2.5V source via REFIN for traceable metrology. Use Value: ±0.22% FSR gain error and ±0.5mV offset error enable single-point calibration; 15-bit no-missing-codes guarantee eliminates interpolation artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8320Y/2K | 16-bit, 100kHz max throughput, ±8 LSB INL, same TQFP-32 package | Limited to lower-speed applications like sensor data logging; lacks 500kHz capability and 20ps aperture jitter spec | Select only when throughput <125kHz suffices and cost reduction outweighs speed loss |
| ADS8326IPW | 16-bit, 500kHz, SPI interface, 28-TSSOP, ±4 LSB INL, no internal reference | Requires external reference and serial interface controller; smaller footprint but higher layout complexity for noise-sensitive analog routing | Choose for space-constrained designs accepting SPI overhead and external reference sourcing |
Compared with ADS8322YB/2K, ADS8320Y/2K trades 5× lower throughput for reduced power (25mW), while ADS8326IPW replaces parallel simplicity with SPI flexibility and tighter INL - neither offers identical combination of 500kHz parallel interface, internal reference, and ±6 LSB linearity in TQFP-32.
Availability
ADS8322YB/2K is available at Aetrix Electronics and suitable for CT scanner signal chains, high-speed industrial data acquisition, medical ultrasound beamformers, and automated test equipment requiring stable component supply across extended product lifecycles.
Supply support for ADS8322YB/2K 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 signal chain solutions.
The ADS8322YB/2K belongs to TI's high-speed SAR ADC product line, designed specifically for applications demanding 16-bit resolution at ≥250kHz throughput with integrated reference and parallel interface - targeting medical imaging, test instrumentation, and real-time control systems.
FAQ
What is the maximum sampling rate supported by the ADS8322YB/2K?
The ADS8322YB/2K supports a maximum sampling rate of 500kHz, achieved with a 10MHz external CLOCK input. This rate is guaranteed across the full industrial temperature range (–40°C to +85°C) and corresponds to a 1.6μs conversion time and 350ns acquisition window, as specified in the SBAS215A datasheet.
Does the ADS8322YB/2K include an internal voltage reference?
Yes, the ADS8322YB/2K integrates a precision 2.5V bandgap reference with ±25mV initial accuracy and 20ppm/°C temperature drift. When enabled, REFOUT is internally connected to REFIN; a 0.1μF capacitor must be placed at REFOUT for stability, as documented in the TI SBAS215A datasheet.
What package type and pin count does the ADS8322YB/2K use?
The ADS8322YB/2K is housed in a TQFP-32 (PBS) package with 0.8mm lead pitch and exposed thermal pad. Pin 1 orientation follows quadrant Q2 per TI's tape-and-reel specification, and the device is rated for moisture sensitivity level 3 (260°C peak reflow).
How does the BYTE pin affect data readout on the ADS8322YB/2K?
When BYTE = low, the ADS8322YB/2K outputs the full 16-bit result on DB15–DB0. When BYTE = high, only the upper 8 bits (D15–D8) appear on DB7–DB0, requiring two sequential RD strobes to read the complete word - first with BYTE low (LSB byte), then BYTE high (MSB byte).
What is the integral linearity error specification for the ADS8322YB/2K?
The ADS8322YB/2K has a maximum integral linearity error (INL) of ±6 LSB over the industrial temperature range, as confirmed in the Electrical Characteristics table of the SBAS215A datasheet. This corresponds to <0.1% of full-scale range and guarantees monotonic operation up to 15 bits.
ADS8322YB/2K 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/2K FAQ
1.How can I place an order for ADS8322YB/2K through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8322YB/2K 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/2K reliable?
The price and inventory of ADS8322YB/2K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8322YB/2K is usually 5 days.
3.What payment methods are accepted for ADS8322YB/2K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8322YB/2K transactions.
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4.How is shipping managed for ADS8322YB/2K?
ADS8322YB/2K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8322YB/2K 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/2K?
For technical support, including ADS8322YB/2K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8322YB/2K requirements.
6.How does Aetrix verify that ADS8322YB/2K is sourced from the original manufacturer or authorized distributors?
All ADS8322YB/2K 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/2K meets industry standards.
7.What is the process for return or replacement of ADS8322YB/2K?
All ADS8322YB/2K units undergo pre-shipment inspection (PSI). If there is an issue with ADS8322YB/2K, 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/2K part is unused and in its original packaging.
Return procedure for ADS8322YB/2K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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