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Analog Devices Inc. AD9841AJSTRL
- Part No.:
- AD9841AJSTRL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Sensor and Detector Interfaces
- Package:
- 48-LQFP
- Datasheet:
-
AD9841AJSTRL.pdf
- Description:
- IC CCD SIGNAL PROC 10BIT 48-LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
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Product details
Overview
AD9841AJSTRL from Analog Devices is a complete 10-bit, 20 MSPS CCD signal processor IC featuring correlated double sampling (CDS), 6-bit pixel gain amplifier (PxGA®), 10-bit variable gain amplifier (VGA) with 2 dB to 36 dB range, active black-level clamp, and 3-wire serial interface - all operating from a single 3 V supply in digital still cameras and camcorders.
For engineers reviewing the AD9841AJSTRL datasheet, AD9841AJSTRL pinout, AD9841AJSTRL application, or AD9841AJSTRL equivalent, this page delivers verified technical context, exact pin functions, real-world timing constraints, confirmed ADC performance metrics, and validated alternative options for CCD analog front-end design.
Technical Context
The AD9841AJSTRL implements a single-channel CCD signal chain with CDS sampling synchronized to SHP/SHD rising edges (3 ns internal delay), PxGA gain switching controlled by HD/VD color steering modes (7 programmable patterns), and VGA gain resolution of 1024 steps across its full 2–36 dB range. Its input clamp operates at line rate using CLPDM/CLPOB clocks.
It supports three operational modes: CCD mode (CCDIN input, 10-bit ADC), AUX1 mode (AUX1IN input, 60 mW), and AUX2 mode (AUX2IN input, 60 mW), each with distinct VGA gain ranges and power profiles. The 3-wire serial interface uses SL-latched SCK/SDATA with 10 MHz max clock and supports register readback and sequential write.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 10-bit - guarantees no missing codes over full temperature range; full-scale input = 2.0 V, LSB = 2 mV. |
| Max Sampling Rate | 20 MSPS - supports progressive/interlaced scan CCDs up to 20 MHz DATACLK; pipeline delay = 9 cycles. |
| VGA Gain Range | 2 dB to 36 dB in 1024 steps - enables precise analog gain control before digitization; low-gain code 91 = 2 dB, max code 1023 = 36 dB. |
| PxGA Gain Range | –2 dB to +10 dB in 64 monotonic steps - provides per-pixel color gain correction for Bayer and other mosaic filter arrays. |
| Power Consumption | 78 mW typical at 3.0 V - includes all analog/digital blocks; drops to 30 mW in fast recovery mode, 5 mW in standby. |
| Input Clamp Resolution | 256 steps - clamp level adjustable from 0 to 63.75 LSB at ADC output; used for optical black pixel offset removal. |
| Supply Voltage | 2.7 V to 3.6 V - single 3 V rail powers AVDD, DVDD, DRVDD; absolute max = +3.9 V on all supplies. |
Pinout & Package
AD9841AJSTRL is housed in a 48-lead LQFP package (ST-48), thermally rated at θJA = 92°C/W, with exposed pad not internally connected. Pin 1 identifier located top-left; pins 1–2 and 31 are NC (internally not connected); pins 15/41 and 25/26/35 are DVSS/AVSS ground planes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D9 (Pins 3–12) | Digital data outputs | 10-bit parallel ADC output bus; MSB = D9, LSB = D0; driven by DRVDD/DRVSS; three-state controllable via THREE-STATE pin (Pin 42). |
| SHP / SHD (Pins 21/22) | CDS sampling clocks | Rising-edge triggered; SHP samples CCD reference level, SHD samples data level; internal 3 ns aperture delay applies to both. |
| CLPOB / CLPDM (Pins 20/23) | Black-level clamp clocks | CLPOB clamps during optical black pixels; CLPDM clamps during dummy/black pixels; both overwrite PBLK if overlapping. |
| CCDIN (Pin 30) | Analog CCD signal input | AC-coupled input (0.1 µF recommended); max input range = 1.0 V p-p before saturation at PxGA 4 dB gain. |
| HD / VD (Pins 18/24) | Color steering control | Drive PxGA gain selection per pixel; support 7 modes (e.g., Mosaic Separate, Interlace); updated at SHP rising edge with 3 ns setup. |
| SCK / SDATA / SL (Pins 48/47/46) | 3-wire serial interface | SL-latched; SCK ≤ 10 MHz; SDATA valid after 5th SCK falling edge on read; RNW bit controls direction. |
Key Features
| Feature | Design Value |
|---|---|
| Correlated Double Sampling (CDS) | 0 dB fixed gain with 500 mV allowable reset transient - rejects low-frequency CCD noise and kTC noise without external components. |
| Pixel Gain Amplifier (PxGA®) | 6-bit programmable gain with four independent values - enables per-pixel white balance correction and compensates for color filter response mismatch in Bayer arrays. |
| Active Black-Level Clamp | 256-step resolution with 0–63.75 LSB range - removes optical black offset at analog input stage to prevent gain-step-induced black level shift. |
| Single 3 V Supply Operation | Full functionality at 2.7–3.6 V - eliminates need for dual ± supplies or charge pumps; reduces BOM count and PCB area in portable imaging systems. |
| Fast Power-Up Recovery | 0.1 ms in fast recovery mode - enables rapid wake-from-standby for burst capture or video preview without frame loss. |
Applications
| Digital Still Cameras | Digital Video Camcorders |
|---|---|
Use Scenario: Capturing high-fidelity still images from interlaced or progressive-scan CCD sensors in compact DSLR or mirrorless bodies. IC Role / Device Role / Timing Role: Primary analog front-end signal processor performing CDS, PxGA-based color gain correction, VGA scaling, and 10-bit digitization at 20 MSPS. Use Value: Enables accurate 10-bit image capture with <0.1% peak nonlinearity at 500 mV input and 0.2 LSB rms total output noise - preserving shadow detail and dynamic range. | Use Scenario: Real-time video acquisition in consumer-grade camcorders using area CCDs with optical black pixels. IC Role / Device Role / Timing Role: Line-rate CCD signal conditioner with CLPOB/CLPDM-controlled black-level clamping and HD/VD-synchronized PxGA gain switching. Use Value: Maintains stable black level across VGA gain changes (no gain step), reducing post-processing load and enabling consistent exposure in auto-iris systems. |
| Industrial Machine Vision Systems | Medical Endoscopy Imaging |
Use Scenario: High-reliability inspection systems requiring precise analog gain control and deterministic timing for trigger-synchronized frame capture. IC Role / Device Role / Timing Role: Timing-critical AFE with SHP/SHD edge-aligned sampling (tS1 ≤ 12.5 ns), 9-cycle pipeline latency, and programmable power-down modes. Use Value: Guarantees sub-13 ns timing margins between SHP and SHD edges - critical for minimizing CDS pedestal error in high-speed line-scan applications. | Use Scenario: Miniaturized endoscopic cameras where low power and small footprint are essential for battery-powered handheld units. IC Role / Device Role / Timing Role: Low-power CCD processor consuming only 78 mW at 3.0 V, supporting AUX1/AUX2 auxiliary inputs for calibration signal injection. Use Value: Reduces thermal load in confined spaces while maintaining 40 dB PSR against supply noise - improving SNR in low-light medical imaging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CCD signal processing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9842AJSTRL | 12-bit ADC (vs. 10-bit), 256-step clamp level (0–255 LSB), identical pinout and serial interface. | Higher-resolution imaging where >10-bit dynamic range is required; same CCD/AUX timing and PxGA/VGA architecture. | Select AD9842AJSTRL when system-level SNR and quantization headroom demand true 12-bit linearity and missing-code-free performance. |
| TDC1300IPWPR | 12-bit, 20 MSPS, integrated PGA + CDS but no PxGA; SPI interface; 32-pin TSSOP; 2.85–3.6 V supply. | Lacks per-pixel gain steering and color-mode flexibility; optimized for linear sensor arrays rather than mosaic-filter CCDs. | Choose TDC1300IPWPR for cost-sensitive, non-mosaic applications where PxGA functionality is unnecessary and smaller package is preferred. |
Compared with AD9842AJSTRL, AD9841AJSTRL trades 2-bit resolution for lower data throughput and reduced FPGA/ASIC interface complexity; versus TDC1300IPWPR, it adds essential PxGA and multi-mode clamp control for color CCDs but requires larger LQFP packaging and higher pin count.
Availability
AD9841AJSTRL is available at Aetrix Electronics and suitable for digital still cameras, digital video camcorders, and industrial machine vision systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AD9841AJSTRL 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD9841A product line was designed specifically for CCD-based imaging systems requiring integrated CDS, pixel-level gain control, and precision analog signal conditioning in a single 3 V device - targeting compact, low-power, high-fidelity camera modules.
FAQ
What is the maximum clock rate supported by the AD9841AJSTRL?
The AD9841AJSTRL supports a maximum DATACLK, SHP, and SHD clock rate of 20 MHz, with minimum pulse widths of 20 ns for DATACLK and 7 ns for SHP/SHD. This enables full-speed operation with CCDs requiring 20 MSPS sampling, and the internal pipeline delay remains fixed at 9 clock cycles across the specified range.
Does the AD9841AJSTRL include a built-in pixel gain amplifier (PxGA)?
Yes, the AD9841AJSTRL integrates a 6-bit Pixel Gain Amplifier (PxGA®) with programmable gain ranging from –2 dB to +10 dB in 64 monotonic steps. It supports seven color steering modes (e.g., Mosaic Separate, Interlace) controlled by HD/VD signals, enabling per-pixel gain correction for Bayer and other mosaic CCD architectures.
What are the power consumption characteristics of the AD9841AJSTRL in different operating modes?
The AD9841AJSTRL consumes 78 mW typically in normal CCD-mode operation at 3.0 V. In fast recovery mode it draws 30 mW, in standby mode 5 mW, and in total power-down mode just 1 mW. AUX1 and AUX2 modes reduce total power to 60 mW, making it suitable for battery-constrained imaging devices.
How does the AD9841AJSTRL handle black-level clamping for CCD optical black pixels?
The AD9841AJSTRL performs active black-level clamping at the analog input stage using CLPOB and CLPDM clocks. Clamp level is digitally programmable in 256 steps (0–63.75 LSB at ADC output), and clamping occurs during optical black or dummy pixels - removing offset before VGA gain to eliminate gain-step-induced black level shifts.
Is the AD9841AJSTRL pin-compatible with the AD9842AJSTRL?
Yes, the AD9841AJSTRL and AD9842AJSTRL share identical 48-lead LQFP (ST-48) packaging, pin assignments, power domains, timing specifications, and serial interface protocol. The only functional difference is ADC resolution: AD9841AJSTRL provides 10-bit conversion with 63.75 LSB max clamp level, while AD9842AJSTRL offers 12-bit conversion with 255 LSB max clamp level.
AD9841AJSTRL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 48-LQFP
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- CCD Signal Processor, 10-Bit
- Input Type:
- Logic
- Output Type:
- Logic
- Current - Supply:
- -
- Operating Temperature:
- -20°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LQFP (7x7)
AD9841AJSTRL FAQ
1.How can I place an order for AD9841AJSTRL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9841AJSTRL 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 AD9841AJSTRL reliable?
The price and inventory of AD9841AJSTRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9841AJSTRL is usually 5 days.
3.What payment methods are accepted for AD9841AJSTRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9841AJSTRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9841AJSTRL?
AD9841AJSTRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9841AJSTRL 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 AD9841AJSTRL?
For technical support, including AD9841AJSTRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9841AJSTRL requirements.
6.How does Aetrix verify that AD9841AJSTRL is sourced from the original manufacturer or authorized distributors?
All AD9841AJSTRL 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 AD9841AJSTRL meets industry standards.
7.What is the process for return or replacement of AD9841AJSTRL?
All AD9841AJSTRL units undergo pre-shipment inspection (PSI). If there is an issue with AD9841AJSTRL, 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 AD9841AJSTRL part is unused and in its original packaging.
Return procedure for AD9841AJSTRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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