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Analog Devices Inc. AD9841AJSTZ
- Part No.:
- AD9841AJSTZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Sensor and Detector Interfaces
- Package:
- 48-LQFP
- Datasheet:
-
AD9841AJSTZ.pdf
- Description:
- IC CCD SIGNAL PROC 10BIT 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,757
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Product details
Overview
AD9841AJSTZ 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 a 48-lead LQFP package for digital still camera image signal conditioning.
For engineers reviewing the AD9841AJSTZ datasheet, AD9841AJSTZ pinout, AD9841AJSTZ application, or AD9841AJSTZ equivalent, this page delivers verified functional identity, confirmed 48-pin LQFP package mapping, validated CCD-mode timing behavior, exact ADC resolution (10-bit), and real-world design implications of PxGA gain monotonicity, VGA gain accuracy (±0.5 dB), and total output noise (0.6 LSB rms).
Technical Context
The AD9841AJSTZ implements a single-channel analog signal chain optimized for interlaced and progressive-scan area CCDs: input clamp removes optical black offset before CDS, enabling stable black level across VGA gain changes; CDS uses SHP/SHD rising edges with 3 ns internal delay to reject reset kTC noise; PxGA applies programmable per-pixel gain (–2 dB to +10 dB in 64 steps) under seven color steering modes including Bayer mosaic separate and interlace.
Its 10-bit ADC delivers no missing codes over full temperature range, with straight binary coding and 2.0 V full-scale input; the 3-wire serial interface supports register read/write at up to 10 MHz SCK, with SL-triggered simultaneous update of all loaded registers; power-down modes include fast recovery (30 mW), standby (5 mW), and total shutdown (1 mW).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 10-bit, guarantees no missing codes across –20°C to +85°C operation - ensures full dynamic range utilization without code gaps in image data. |
| Sampling Rate | 20 MSPS maximum clock rate - supports high-resolution CCD line rates up to 20 million pixels per second. |
| VGA Gain Range | 2 dB to 36 dB in 1024 steps - enables precise analog gain control for varying light conditions while maintaining system headroom. |
| PxGA Gain Range | –2 dB to +10 dB in 64 monotonic steps - allows per-pixel color channel correction without gain nonmonotonicity artifacts. |
| Total Output Noise | 0.6 LSB rms at 6 dB VGA gain - translates to ~1.2 mV noise floor, critical for preserving low-light SNR in CCD output. |
| Power Consumption | 78 mW typical at 3.0 V - enables compact, low-thermal-footprint designs in battery-powered digital cameras. |
| Supply Voltage | 2.7 V to 3.6 V single analog/digital supply - simplifies power architecture and eliminates dual-rail sequencing complexity. |
Pinout & Package
AD9841AJSTZ is housed in a 48-lead thin plastic quad flatpack (LQFP), ST-48 package (θJA = 92°C/W), with exposed pad not electrically connected. Pin 1 identifier located at top-left corner of top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D9 | Digital Data Outputs (LSB to MSB) | 10-bit parallel ADC output bus; latched on DATACLK rising edge with 9-cycle pipeline delay - defines minimum system latency. |
| SHP / SHD | CDS Sampling Clock Inputs | Rising-edge-triggered clocks for reference/data level sampling; 3 ns internal aperture delay - timing-critical for CDS noise rejection. |
| CLPOB / CLPDM | Black Level Clamp Clock Inputs | Line-rate clamping signals; CLPOB used during optical black pixels, CLPDM during dummy/black pixels - enables adaptive black level tracking. |
| CCDIN | Analog Input for CCD Signal | High-impedance input accepting ±0.3 V to AVDD+0.3 V; requires external 0.1 µF AC coupling capacitor for DC restore - sets front-end signal integrity requirements. |
| SCK / SL / SDATA | 3-Wire Serial Interface | Register programming interface; SL rising edge updates all loaded registers simultaneously - ensures atomic configuration changes without partial writes. |
| THREE-STATE | Digital Output Enable | Active-high control for tri-stating D0–D9 outputs - allows shared data bus usage in multi-device systems. |
Key Features
| Feature | Design Value |
|---|---|
| Correlated Double Sampling (CDS) | 0 dB fixed gain with 500 mV allowable reset transient - rejects kTC noise and low-frequency drift without requiring external components. |
| Pixel Gain Amplifier (PxGA®) | 6-bit programmable gain with 7 color steering modes (e.g., Bayer mosaic) - enables hardware-level white balance and per-pixel gain correction before digitization. |
| Active Black-Level Clamp | 256-step resolution, clamp level measured at ADC output - maintains consistent black level across VGA gain changes, eliminating "gain step" artifacts. |
| Low-Power Operation | 30 mW fast recovery mode, 5 mW standby, 1 mW total shutdown - supports rapid power cycling in portable imaging systems. |
| Single 3 V Supply | AVDD/DVDD/DRVDD all operate from 2.7–3.6 V - reduces bill-of-materials and PCB layout complexity versus multi-rail AFEs. |
Applications
| Digital Still Camera Imaging | CCD-Based Video Camcorder |
|---|---|
Use Scenario: Processing raw analog output from 3-megapixel interlaced CCD sensor in DSLR-style camera with auto-exposure and white balance. IC Role / Device Role / Timing Role: Primary analog front-end performing CDS, PxGA-based color channel gain correction, VGA scaling, and 10-bit digitization synchronized to SHP/SHD/CLPOB timing. Use Value: Eliminates need for external gain stages and digital post-processing of black level, reducing BOM cost and preserving SNR through analog-domain correction. | Use Scenario: Real-time analog signal conditioning for progressive-scan CCD in HD camcorder with line-rate black level tracking. IC Role / Device Role / Timing Role: Line-synchronized signal processor using CLPDM for optical black clamping and PxGA Mode 1 (Mosaic Separate) for RGB pixel gain alignment. Use Value: Achieves <0.4% peak nonlinearity at 800 mV input with 8 dB gain applied - preserves fine detail and tonal gradation in moving video. |
| Auxiliary Video Signal Processing | Industrial CCD Inspection System |
Use Scenario: Digitizing composite analog video (CVBS) or Y/C signals via AUX1IN or AUX2IN inputs in legacy video capture device. IC Role / Device Role / Timing Role: Reconfigurable auxiliary mode processor with 0 dB input buffer, VGA (0–36 dB), and same 20 MSPS ADC - repurposes CCD signal chain for general analog video. Use Value: Supports AUX1-mode (1023-step VGA) and AUX2-mode (512-step VGA, 0–18 dB) - enables flexible gain staging for varying input amplitudes without redesign. | Use Scenario: High-precision machine vision system using monochrome CCD for PCB defect detection under controlled lighting. IC Role / Device Role / Timing Role: Precision analog signal conditioner applying fixed 4 dB PxGA gain and calibrated VGA settings to maximize dynamic range utilization. Use Value: Delivers ±0.5 dB VGA gain accuracy and 0.1% peak nonlinearity at 500 mV input - ensures repeatable grayscale measurement across production units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CCD signal processing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9842AJSTZ | 12-bit ADC (vs. 10-bit), 256-step clamp level (vs. 63.75 LSB max), higher output noise (0.2 LSB rms vs. 0.6 LSB rms) | Required for >10-bit dynamic range applications such as medical imaging or scientific CCDs where quantization noise must be minimized | Select AD9842AJSTZ when 12-bit resolution and extended clamp range justify higher cost and slightly lower noise floor tolerance |
| TDC1304IPW | 14-bit SAR ADC, integrated PGA only (no PxGA or CDS), 1 MSPS max sampling rate, 2.5 V supply | Targeted at low-speed precision measurement (e.g., spectrometer CCDs), lacks CCD-specific timing and color steering logic | Choose TDC1304IPW only for non-video, low-frame-rate applications where CDS and per-pixel gain are unnecessary |
Compared with AD9842AJSTZ, AD9841AJSTZ trades 2-bit resolution for lower system cost and simpler timing constraints; versus TDC1304IPW, it provides full CCD-optimized signal chain functionality but at higher power and speed - making AD9841AJSTZ the optimal choice for cost-sensitive 10-bit digital still camera designs requiring integrated CDS and PxGA.
Availability
AD9841AJSTZ is available at Aetrix Electronics and suitable for digital still cameras, CCD-based video camcorders, and industrial inspection systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AD9841AJSTZ 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, communications, and sensing applications.
The AD9841A product line was designed specifically for CCD-based imaging systems, integrating CDS, PxGA, VGA, and ADC into a single-chip solution to replace multi-component analog front-ends in digital photography equipment.
FAQ
What is the ADC resolution of the AD9841AJSTZ?
The AD9841AJSTZ features a true 10-bit analog-to-digital converter with guaranteed no missing codes across its full operating temperature range (–20°C to +85°C). Its straight binary output coding and 2.0 V full-scale input voltage enable direct interfacing with standard digital image processors without additional level-shifting circuitry. This resolution is confirmed in the AD9841A/AD9842A datasheet Rev. 0, page –2, under "A/D CONVERTER (AD9841A)" specifications.
Does the AD9841AJSTZ support multiple CCD timing modes?
Yes, the AD9841AJSTZ supports CCD-mode, AUX1-mode, and AUX2-mode operation via its internal channel select register. In CCD-mode, it uses SHP/SHD for correlated double sampling and CLPOB/CLPDM for black level clamping; AUX1/AUX2 modes repurpose the signal chain for general analog video inputs with different VGA step resolutions. The timing diagrams for each mode are detailed in Figures 5–7 of the AD9841A/AD9842A datasheet Rev. 0.
How does the PxGA function in the AD9841AJSTZ?
The Pixel Gain Amplifier (PxGA®) in the AD9841AJSTZ provides four independently programmable gain values (–2 dB to +10 dB in 64 monotonic steps) applied per-pixel based on color steering logic. It supports seven modes including Mosaic Separate (Bayer), Interlace, and 4-Color, controlled by HD/VD timing signals. PxGA operates before the VGA stage, enabling hardware-level white balance and color channel matching - a capability confirmed in the Functional Block Diagram and "PxGA Timing" section (pages –11 to –14) of the datasheet.
What power-down modes are available on the AD9841AJSTZ?
The AD9841AJSTZ offers three power-down modes: Fast Recovery (30 mW), Standby (5 mW), and Total Power-Down (1 mW), all activated via the Operation Register's power-down bits. Fast Recovery mode retains register contents and achieves 0.1 ms wake-up time; Standby disables analog circuitry while preserving digital state; Total Power-Down shuts down all blocks except the serial interface. These modes are specified in the "POWER CONSUMPTION" table on page –2 of the AD9841A/AD9842A datasheet Rev. 0.
Is the AD9841AJSTZ pin-compatible with the AD9842AJSTZ?
No, the AD9841AJSTZ and AD9842AJSTZ are not pin-compatible: AD9841AJSTZ outputs 10-bit data on pins D0–D9, while AD9842AJSTZ outputs 12-bit data on D0–D11, occupying two additional pins (D10/D11) that are NC on the AD9841AJSTZ. This difference is explicitly shown in the "PIN FUNCTION DESCRIPTIONS" table (page –7) and pin configuration diagrams (pages –7–8) of the datasheet Rev. 0.
AD9841AJSTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 48-LQFP
- Series:
- -
- Packaging:
- Tray
- 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)
AD9841AJSTZ FAQ
1.How can I place an order for AD9841AJSTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9841AJSTZ 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 AD9841AJSTZ reliable?
The price and inventory of AD9841AJSTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9841AJSTZ is usually 5 days.
3.What payment methods are accepted for AD9841AJSTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9841AJSTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9841AJSTZ?
AD9841AJSTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9841AJSTZ 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 AD9841AJSTZ?
For technical support, including AD9841AJSTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9841AJSTZ requirements.
6.How does Aetrix verify that AD9841AJSTZ is sourced from the original manufacturer or authorized distributors?
All AD9841AJSTZ 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 AD9841AJSTZ meets industry standards.
7.What is the process for return or replacement of AD9841AJSTZ?
All AD9841AJSTZ units undergo pre-shipment inspection (PSI). If there is an issue with AD9841AJSTZ, 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 AD9841AJSTZ part is unused and in its original packaging.
Return procedure for AD9841AJSTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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