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Texas Instruments VSP1221PFB
- Part No.:
- VSP1221PFB
- Manufacturer:
- Texas Instruments
- Category:
- Video Processing
- Package:
- 48-TQFP
- Datasheet:
-
VSP1221PFB.pdf
- Description:
- IC VIDEO CCD SIGNAL PROC 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,921
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Product details
Overview
VSP1221PFB from Texas Instruments is a 12-bit, 21-MSPS ultralow-power CCD signal processor featuring correlated double sampling (CDS), analog and digital programmable-gain amplifiers (PGA), and optical-black calibration. It operates from a single 3-V supply, delivers 75-dB SNR at 0-dB gain, and supports 0–36 dB analog gain in 0.05-dB steps. Used in digital still and video cameras for CCD output conditioning and digitization.
For engineers reviewing the VSP1221PFB datasheet, VSP1221PFB pinout, VSP1221PFB application, or VSP1221PFB equivalent, key selection criteria include its 48-pin TQFP package, 70-mW active power consumption, 4-mW power-down mode, 12-bit pipelined ADC architecture, and integrated OB calibration loop for precision CCD offset correction.
Technical Context
The VSP1221PFB integrates a correlated double sampler (CDS) followed by an analog PGA and a 12-bit, 21-MSPS pipelined ADC. Its digital PGA stage provides post-conversion gain adjustment, while the optical-black calibration loop enables user-programmable reference level correction.
It uses a serial interface (SCLK/SDIN/SLOAD) for register configuration and includes two 8-bit DACs (DACO1/DACO2) for external analog bias control. The device supports single-supply operation with separate AVDD/AVSS and DVDD/DVSS domains, and features STBY and SHD pins for low-power state management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution & Speed | 12-bit, 21-MSPS pipelined ADC - enables high-fidelity digitization of fast-scan CCD outputs without pipeline latency bottlenecks. |
| Analog Gain Range | 0 dB to 36 dB in 0.05-dB steps - allows fine-grained exposure control and dynamic range optimization per pixel line. |
| Input-Referred Noise | 75-dB SNR typical at 0-dB gain - ensures minimal noise contribution during low-light CCD signal amplification. |
| Power Consumption | 70 mW active, 4 mW power-down - supports battery-powered imaging systems requiring ultralow standby leakage. |
| Supply Voltage | Single 3-V supply with split analog/digital rails (AVDD/DVDD, AVSS/DVSS) - simplifies power design while maintaining signal integrity. |
| Optical-Black Calibration | User-programmable OB reference loop - enables real-time dark-current compensation without external circuitry. |
Pinout & Package
48-pin TQFP (PFB package), 7.0 mm × 7.0 mm body, 0.5-mm pitch, JEDEC MS-026 compliant, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIN, SCLK, SLOAD | Serial configuration interface | Three-wire SPI-compatible port for programming internal registers including gain, OB level, and power modes. |
| D0–D11 | Parallel digital output bus | 12-bit LSB-first parallel data path delivering digitized CCD samples at up to 21 MSPS. |
| REFP, REFM | ADC reference inputs | Differential reference pair defining full-scale range; supports external or internal reference selection. |
| CLPDM, CLPOB, SHP, TP1, TP2 | CCD timing and test signals | Support CDS clocking (CLPDM/CLPOB), sample-hold pulse (SHP), and test points for CCD waveform alignment. |
| OE, STBY, SHD | Output and power control | Output enable (OE), standby (STBY), and shutdown (SHD) pins allow precise sequencing of data output and power states. |
Key Features
| Feature | Design Value |
|---|---|
| Correlated Double Sampling (CDS) | On-chip CDS eliminates reset noise and kTC noise from CCD output, enabling clean baseline restoration before amplification. |
| Programmable Optical-Black Loop | Digitally adjustable OB reference level compensates for temperature-dependent dark current drift across CCD frames. |
| Dual 8-bit DAC Outputs | DACO1 and DACO2 provide independent analog bias voltages for CCD clock drivers or sensor bias networks. |
| Low-Aperture Delay Architecture | Minimizes timing skew between sampling and hold phases, preserving CCD signal fidelity in high-speed scanning. |
Applications
| Digital Still Camera | Digital Video Camera |
|---|---|
Use Scenario: High-resolution still capture using interline-transfer CCD sensors with on-chip analog signal conditioning. IC Role / Device Role / Timing Role: Primary CCD signal processor handling CDS, analog/digital gain, and 12-bit digitization at up to 21 MSPS. Use Value: Enables compact, low-power camera modules with calibrated black-level stability and 75-dB SNR performance. | Use Scenario: Progressive-scan video recording with rolling shutter CCDs requiring real-time noise suppression and gain control. IC Role / Device Role / Timing Role: Front-end signal conditioner providing OB-corrected digitized video streams synchronized to horizontal/vertical timing signals. Use Value: Delivers consistent image quality across varying lighting conditions via 0.05-dB analog gain resolution and low-aperture delay. |
| Industrial Machine Vision | Scientific Imaging Systems |
Use Scenario: Automated optical inspection (AOI) systems using linear CCD arrays for high-accuracy defect detection. IC Role / Device Role / Timing Role: Precision analog front-end with programmable gain and OB calibration for stable pixel response over temperature and time. Use Value: Reduces system-level calibration overhead through on-chip dark-reference tracking and 12-bit linearity (INL < ±1.5 LSB). | Use Scenario: Low-light astronomy or microscopy applications requiring maximum SNR and minimal quantization error. IC Role / Device Role / Timing Role: High-fidelity digitizer with 75-dB SNR and low input-referred noise, supporting long-exposure CCD readout. Use Value: Preserves weak signal integrity via ultralow-noise CDS and 70-mW active power - critical for thermal-noise-limited operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CCD signal processing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9845BASTZ | 14-bit, 25-MSPS ADC with integrated CDS and PGA; requires dual ±5-V supplies; no on-chip DACs. | Better resolution and speed but higher power (120 mW) and larger PCB footprint; suited for lab-grade imaging, not portable cameras. | Select when higher dynamic range and SNR (>78 dB) outweigh size and power constraints. |
| TDC1000YFFT | Ultrasonic AFE, not CCD-optimized; lacks CDS, OB calibration, and CCD timing interfaces (CLPDM/CLPOB). | Designed for time-of-flight sensing, not optical imaging; incompatible with CCD clocking and dark-current correction requirements. | Not suitable as functional replacement; only consider if redesigning sensor modality entirely. |
Compared with AD9845BASTZ and TDC1000YFFT, the VSP1221PFB uniquely combines CCD-specific timing interfaces, optical-black calibration, dual DAC outputs, and ultralow 70-mW power in a 48-pin TQFP - making it irreplaceable for legacy portable imaging designs where pin compatibility and firmware reuse are essential.
Availability
VSP1221PFB is available at Aetrix Electronics and suitable for digital still cameras, digital video cameras, industrial machine vision systems, and scientific imaging equipment requiring stable component supply and long-term obsolescence support.
Supply support for VSP1221PFB 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and digital signal solutions for industrial, automotive, and consumer markets.
The VSP1221PFB belongs to TI's legacy CCD signal processor product line, designed specifically for high-fidelity, low-power digitization of interline and full-frame CCD sensor outputs in portable imaging applications.
FAQ
What is the operating temperature range for the VSP1221PFB?
The VSP1221PFB is specified for operation from 0°C to 70°C ambient temperature. This commercial-grade range aligns with its target use in digital still and video cameras. The device's optical-black calibration loop maintains accuracy across this range, and thermal drift of gain and offset is characterized per the July 2004 revision of the datasheet. No extended or industrial temperature variants exist for the VSP1221PFB.
Does the VSP1221PFB support pin-compatible replacements?
No, the VSP1221PFB does not have a pin-compatible replacement. Its 48-pin TQFP layout, CCD-specific timing pins (CLPDM, CLPOB, SHP), and dual DAC outputs (DACO1/DACO2) are unique to this device. TI has marked it NRND (Not Recommended for New Designs), and no drop-in successor was released. Migration requires board redesign and firmware adaptation.
What are the power supply requirements for the VSP1221PFB?
The VSP1221PFB requires a single 3-V nominal supply, but internally separates analog and digital domains: AVDD/AVSS (analog) and DVDD/DVSS (digital). Each domain must be independently decoupled per the layout guidelines in the datasheet. The device draws 70 mW in active mode and reduces to 4 mW in power-down mode, with STBY and SHD pins controlling state transitions.
How does the optical-black calibration work on the VSP1221PFB?
The VSP1221PFB implements a closed-loop optical-black calibration using dedicated pins (CLPOB, CLPDM) and internal circuitry to sample CCD black-level pixels. The OB reference level is user-programmable via serial interface registers, allowing dynamic adjustment to compensate for temperature-induced dark current drift. This eliminates need for external black-level correction circuitry and improves frame-to-frame consistency.
Is the VSP1221PFB RoHS compliant?
Yes, the VSP1221PFB is RoHS compliant and classified as "Green (RoHS & no Sb/Br)" per TI's packaging addendum. It uses CU NIPDAU lead finish and meets JEDEC Level-2 moisture sensitivity (260°C peak reflow). The device marking "VSP1221" appears on the top surface, and full compliance documentation is available in TI's 16-Apr-2014 Package Option Addendum.
VSP1221PFB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-TQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Processor
- Applications:
- Consumer Video
- Standards:
- -
- Control Interface:
- Analog Voltage
- Voltage - Supply:
- 3V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-TQFP (7x7)
VSP1221PFB FAQ
1.How can I place an order for VSP1221PFB through Aetrix?
Please submit a Request for Quotation (RFQ) for VSP1221PFB 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 VSP1221PFB reliable?
The price and inventory of VSP1221PFB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VSP1221PFB is usually 5 days.
3.What payment methods are accepted for VSP1221PFB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VSP1221PFB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VSP1221PFB?
VSP1221PFB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VSP1221PFB 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 VSP1221PFB?
For technical support, including VSP1221PFB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VSP1221PFB requirements.
6.How does Aetrix verify that VSP1221PFB is sourced from the original manufacturer or authorized distributors?
All VSP1221PFB 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 VSP1221PFB meets industry standards.
7.What is the process for return or replacement of VSP1221PFB?
All VSP1221PFB units undergo pre-shipment inspection (PSI). If there is an issue with VSP1221PFB, 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 VSP1221PFB part is unused and in its original packaging.
Return procedure for VSP1221PFB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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