My Inquiry
My Account
Texas Instruments VSP1221PFBG4
- Part No.:
- VSP1221PFBG4
- Manufacturer:
- Texas Instruments
- Category:
- Video Processing
- Package:
- 48-TQFP
- Datasheet:
-
VSP1221PFBG4.pdf
- Description:
- IC VIDEO CCD SIGNAL PROC 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,131
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
VSP1221PFBG4 from Texas Instruments is a 12-bit, 21-MSPS ultralow-power CCD signal processor with integrated correlated double sampler (CDS), analog and digital programmable-gain amplifiers (PGA), and optical-black calibration loop. It operates from a single 3-V supply, delivers 75-dB SNR at 0-dB gain, and supports 0–36 dB gain range in 0.05-dB steps for precision imaging front-ends in digital still and video cameras.
For engineers reviewing the VSP1221PFBG4 datasheet, VSP1221PFBG4 pinout, VSP1221PFBG4 application, or VSP1221PFBG4 equivalent, key selection criteria include its 21-MSPS ADC throughput, 70-mW active power consumption, 48-pin TQFP package, optical-black calibration architecture, and serial configuration interface for CCD timing-critical signal chains.
Technical Context
The VSP1221PFBG4 implements a mixed-signal signal chain comprising a correlated double sampler (CDS) followed by an analog PGA stage, a 12-bit pipelined ADC running at up to 21 MSPS, and a post-conversion digital PGA. Its CDS reduces reset noise and fixed-pattern noise inherent in CCD outputs.
Optical-black (OB) calibration is performed via a dedicated closed-loop offset correction system with user-programmable reference level; two on-chip 8-bit DACs support external analog biasing. Configuration occurs over a 3-wire serial port (SCLK, SDIN, SLOAD), enabling register-level control of gain, standby mode, and clock 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 quantization degradation in low-light imaging conditions. |
| Power Consumption | 70 mW active, 4 mW power-down - supports battery-operated portable imaging systems with thermal and runtime constraints. |
| Supply Voltage | Single 3-V supply - simplifies power architecture by eliminating dual-rail or LDO sequencing requirements. |
| DNL / INL | <±0.5 LSB DNL, <±1.5 LSB INL typical - guarantees monotonicity and linearity critical for accurate photometric measurement. |
Pinout & Package
Package: 48-pin TQFP (PFB), 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 | Enable full register control of gain, OB calibration, standby, and clock dividers without external microcontroller firmware overhead. |
| AVDD / AVSS / DVDD / DVSS | Analog & digital supply rails | Separate analog/digital power domains minimize coupling noise between sensitive analog front-end and noisy digital logic. |
| REFP / REFM | ADC reference inputs | Accept external differential reference for improved ADC accuracy and rejection of common-mode supply variation. |
| CLPDM / CLPOB / SHP / SCKP | CCD timing control inputs | Support precise synchronization of CDS sampling, optical-black clamping, and pixel clock phases for jitter-sensitive CCD readout. |
| DACO1 / DACO2 | Analog output terminals | Drive external CCD bias voltages (e.g., substrate, gate clocks) with 8-bit resolution and rail-to-rail swing. |
Key Features
| Feature | Design Value |
|---|---|
| Correlated Double Sampling (CDS) | Removes kTC reset noise and low-frequency CCD pedestal drift before amplification, improving effective dynamic range by ≥12 dB. |
| Optical-Black Calibration Loop | Automatically adjusts DC offset using user-defined OB reference level, eliminating manual black-level trimming in production test. |
| Programmable Gain Amplifier (PGA) | Analog PGA (0–36 dB) + digital PGA provide cascaded gain control - preserves SNR while maximizing ADC utilization across illumination conditions. |
| Low-Aperture Delay Architecture | Minimizes timing skew between sample/hold and conversion events, critical for maintaining spatial fidelity in progressive-scan CCDs. |
| Two Integrated 8-Bit DACs | Provide independent analog bias control for CCD clock drivers or sensor substrate voltage, reducing external component count by two precision DAC ICs. |
Applications
| Digital Still Camera | Digital Video Camera |
|---|---|
Use Scenario: High-resolution DSLR or mirrorless camera capturing RAW image data from interline-transfer CCD sensors. IC Role / Device Role / Timing Role: Primary analog front-end signal processor handling CDS, variable gain, and 12-bit digitization at 21 MSPS. Use Value: Enables 75-dB SNR and <±1.5 LSB INL for accurate photometric reproduction and clean shadow detail without post-processing noise reduction. | Use Scenario: Broadcast-grade camcorder using full-frame CCDs with progressive scan and high frame-rate recording. IC Role / Device Role / Timing Role: Timing-critical CCD signal conditioner providing synchronized OB clamping, low-aperture-delay sampling, and serial register configuration. Use Value: Maintains pixel-level timing integrity across 60-Hz or 50-Hz video fields, preventing vertical smear and ensuring consistent black-level stability. |
| Industrial Machine Vision System | Scientific Imaging Instrument |
Use Scenario: Automated optical inspection (AOI) system scanning PCBs or semiconductor wafers under controlled lighting. IC Role / Device Role / Timing Role: Precision analog signal processor for line-scan CCDs requiring repeatable gain, offset, and noise performance across temperature. Use Value: Delivers stable 70-mW power envelope and 0.05-dB gain resolution to support calibrated intensity measurements and defect detection algorithms. | Use Scenario: Astronomical CCD camera operating in cooled environments for long-exposure deep-sky imaging. IC Role / Device Role / Timing Role: Low-noise, low-drift signal processor performing CDS and OB calibration to suppress dark current artifacts. Use Value: Achieves 75-dB SNR at 0-dB gain and supports user-programmable OB reference to adapt to varying sensor dark current profiles over time. |
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; no integrated CDS or OB calibration; requires external op-amp-based CDS circuitry. | Lacks monolithic CDS and OB loop - increases board area, component count, and calibration complexity for CCD systems. | Select when higher resolution (14-bit) and speed (25 MSPS) outweigh integration benefits and design simplicity. |
| TDC1000YFFT | Ultrasonic AFE, not CCD-optimized; no CDS, no OB calibration, no serial timing control pins (CLPDM/CLPOB/SHP). | Designed for time-of-flight sensing, not imaging - incompatible with CCD timing protocols and noise-reduction requirements. | Not suitable as functional alternative; only relevant if migrating to non-CCD sensor modalities. |
Compared with AD9845BASTZ and TDC1000YFFT, the VSP1221PFBG4 uniquely integrates CDS, OB calibration, and CCD-specific timing control in a single 48-pin TQFP, reducing BOM count and eliminating analog design risk associated with discrete CDS implementation.
Availability
VSP1221PFBG4 is available at Aetrix Electronics and suitable for digital still cameras, digital video cameras, and industrial machine vision systems requiring stable component supply and legacy CCD signal chain continuity.
Supply support for VSP1221PFBG4 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, delivering analog, embedded processing, and digital signal processing technologies since 1930.
The VSP1221PFBG4 belongs to TI's legacy CCD signal processor product line, designed specifically to replace discrete CDS+PGA+ADC signal chains in professional and industrial imaging equipment with a single monolithic solution.
FAQ
What is the operating temperature range for the VSP1221PFBG4?
The VSP1221PFBG4 is specified for operation from 0°C to 70°C ambient temperature. This commercial-grade range aligns with its target use in consumer and industrial imaging equipment where active thermal management is feasible. The device marking "VSP1221" and packaging compliance (MSL Level-2, 260°C peak reflow) are consistent across all PFB variants including VSP1221PFBG4.
Does the VSP1221PFBG4 support pin-compatible replacements within the same family?
No - the VSP1221PFBG4 has no pin-compatible variants in the VSP1221 family. All documented versions (e.g., VSP1221PFB) share the identical 48-pin TQFP (PFB) package and pinout, but TI does not designate any as drop-in replacements. The G4 suffix denotes tape-and-reel packaging (250-unit reels); electrical and mechanical specifications remain identical to VSP1221PFB.
How does the optical-black calibration loop function in the VSP1221PFBG4?
The VSP1221PFBG4 implements a closed-loop optical-black calibration system that samples the CCD's optical-black pixels, compares them to a user-programmable reference level (via REFP/REFM), and adjusts internal offset DACs to null the difference. This occurs continuously during active operation, ensuring stable black-level tracking across temperature and aging - a capability confirmed in the device's functional description and pin assignments.
Is the VSP1221PFBG4 recommended for new designs?
No - TI classifies VSP1221PFBG4 as "NRND" (Not Recommended for New Designs), as stated in the official Packaging Information Addendum dated 16-Apr-2014. It remains in production solely to support existing customer programs; new designs should evaluate modern alternatives such as the ADS127L01 or image signal processors with integrated MIPI CSI-2 output.
What are the key timing control pins used for CCD synchronization in the VSP1221PFBG4?
The VSP1221PFBG4 uses CLPDM (Clamp Pulse Digital Mode), CLPOB (Clamp Pulse Optical Black), SHP (Sample Hold Pulse), and SCKP (System Clock Pulse) to synchronize CDS sampling, optical-black clamping, and pixel clock alignment. These pins accept TTL/CMOS-level signals and are explicitly assigned in the top-view pin diagram and functional description of the VSP1221PFBG4.
VSP1221PFBG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-TQFP
- Packaging:
- Tray
- Product Status:
- Discontinued at Digi-Key
- 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)
VSP1221PFBG4 FAQ
1.How can I place an order for VSP1221PFBG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for VSP1221PFBG4 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 VSP1221PFBG4 reliable?
The price and inventory of VSP1221PFBG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VSP1221PFBG4 is usually 5 days.
3.What payment methods are accepted for VSP1221PFBG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VSP1221PFBG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VSP1221PFBG4?
VSP1221PFBG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VSP1221PFBG4 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 VSP1221PFBG4?
For technical support, including VSP1221PFBG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VSP1221PFBG4 requirements.
6.How does Aetrix verify that VSP1221PFBG4 is sourced from the original manufacturer or authorized distributors?
All VSP1221PFBG4 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 VSP1221PFBG4 meets industry standards.
7.What is the process for return or replacement of VSP1221PFBG4?
All VSP1221PFBG4 units undergo pre-shipment inspection (PSI). If there is an issue with VSP1221PFBG4, 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 VSP1221PFBG4 part is unused and in its original packaging.
Return procedure for VSP1221PFBG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
VSP1221PFBG4 Tags
-
HDMI2C1-6C1
STMicroelectronics
-
ADA4430-1YKSZ-R7
Analog Devices Inc.
-
LM1881MX/NOPB
Texas Instruments
-
SN75DP130SSRGZR
Texas Instruments
-
EQCO30T5.2
Microchip Technology
-
LMH1980MM/NOPB
Texas Instruments
-
EQCO30R5.D
Microchip Technology
-
SII9022ACNU
Lattice Semiconductor Corporation
-
SN65DP159RGZR
Texas Instruments
-
SN65DP159RSBR
Texas Instruments
-
SN65DP141RLJR
Texas Instruments
-
LMH0303SQ/NOPB
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
