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Analog Devices Inc. AD9822JRSRL
- Part No.:
- AD9822JRSRL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Sensor and Detector Interfaces
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
AD9822JRSRL.pdf
- Description:
- IC CCD SIGNAL PROC 14BIT 28-SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,807
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Product details
Overview
AD9822JRSRL from Analog Devices is a complete 14-bit CCD/CIS analog signal processor with 3-channel correlated double sampling (CDS), 1–6× programmable gain, ±350 mV offset adjustment, and multiplexed 8+6-bit digital output. It processes trilinear color CCD outputs in flatbed scanners, film scanners, and digital copiers at up to 15 MSPS in 3-channel CDS mode.
For engineers reviewing the AD9822JRSRL datasheet, AD9822JRSRL pinout, AD9822JRSRL application, or AD9822JRSRL equivalent, this page delivers verified functional architecture, real-world timing constraints, channel-specific register mapping, and validated alternative options for imaging signal chain design.
Technical Context
The AD9822JRSRL implements a fully integrated 3-channel analog front-end with independent CDS amplifiers, programmable gain amplifiers (PGA), and offset DACs per channel-each feeding a shared 14-bit ADC via time-multiplexed switching. Its dual-clock CDS architecture (CDSCLK1 for reference level, CDSCLK2 for data level) enables precise noise rejection in CCD readout.
It supports four operational modes-3-channel CDS, 3-channel SHA, 1-channel CDS, and 1-channel SHA-selected via serial configuration register. The 3-wire interface (SCLK/SLOAD/SDATA) programs gain (64-step resolution), offset (512-step sign-magnitude), and mode without external components, while internal voltage reference eliminates need for external precision references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 14-bit - guarantees full-scale linearity and no missing codes across all operating modes and gain settings. |
| Max Conversion Rate | 15 MSPS in 3-channel CDS mode - supports high-speed trilinear CCD readout at 5 MHz pixel clock per channel. |
| Programmable Gain Range | 1× to 5.7× (64 steps) - enables dynamic range optimization for varying CCD output amplitudes without external amplification. |
| Offset Adjustment Range | ±350 mV (512-step sign-magnitude) - compensates sensor-specific DC offsets and clamp-level variations across RGB channels. |
| Input Clamp Voltage | 4 V (default) or 3 V selectable - matches common CCD reset levels and suppresses feedthrough transients up to 1.0 V peak. |
| Power Dissipation | 385 mW typical (3-channel, 15 MSPS) - enables compact thermal design in space-constrained scanner modules. |
| Power-Down Current | <150 µA - allows rapid sleep/wake cycles during idle periods in multifunction peripherals. |
Pinout & Package
AD9822JRSRL is packaged in a 28-lead SSOP (5.3 mm body width), RoHS-compliant, with exposed pad not electrically connected. Thermal resistance θJA = 109°C/W enables operation up to +70°C ambient without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CDSCLK1 | Digital input | Sampling clock for CCD reference level capture; falling edge triggers clamp and reference sampling in CDS mode. |
| CDSCLK2 | Digital input | Sampling clock for CCD data level capture; falling edge triggers differential subtraction in CDS mode or single-sample hold in SHA mode. |
| ADCCLK | Digital input | Master ADC sampling clock; falling edge initiates conversion of multiplexed PGA outputs with fixed 3-cycle latency. |
| OEB | Digital input | Active-low output enable controlling 8-bit parallel data bus (D7–D0); allows shared bus interfacing with microcontrollers or FPGAs. |
| VINR/VING/VINB | Analog inputs | Independent RGB channel inputs accepting 2 V p-p signals; each routed through dedicated CDS/PGA path before multiplexing. |
| OFFSET | Analog output | DC bias decoupling node for coarse offset calibration; voltage applied here subtracts from all three channel inputs in SHA mode. |
| D7–D0 | Digital outputs | Multiplexed 8-bit byte-wide output delivering ADC DB13–DB6 (high byte) and DB5–DB0 (low byte) in two consecutive cycles. |
| SCLK/SLOAD/SDATA | Serial interface | 3-wire SPI-compatible interface for programming configuration, MUX, PGA, and offset registers with 10 MHz max clock rate. |
Key Features
| Feature | Design Value |
|---|---|
| Correlated Double Sampling (CDS) | Integrated per-channel CDS amplifiers eliminate reset noise and kTC noise in CCD sensors-no external op-amps or timing logic required. |
| Channel-to-Channel Crosstalk | <1 LSB at 6 MHz - ensures RGB color fidelity by preventing signal bleed between adjacent channels during high-speed scanning. |
| Input Clamp Circuitry | On-chip 4 V (or 3 V) clamp with 5 kΩ internal resistor and 0.1 µF external capacitor - stabilizes CCD DC level without external bias networks. |
| Internal Voltage Reference | 1.0 V ±6% (CAPT–CAPB) - provides stable 2 V full-scale ADC range; eliminates need for external reference ICs or trimming. |
| 3-Wire Serial Interface | Register-accessible control of gain, offset, mode, and MUX order - enables runtime adaptation to different sensor types (CCD/CIS/CMOS APS) without hardware change. |
Applications
| Flatbed Document Scanners | Film Scanners |
|---|---|
Use Scenario: High-resolution A4 document capture at 600–1200 dpi using trilinear CCD array with RGB sequential exposure. IC Role / Device Role / Timing Role: Signal processor performing correlated double sampling, gain/offset correction, and 14-bit digitization of all three color channels at 15 MSPS aggregate rate. Use Value: Eliminates external CDS circuitry and discrete ADC, reducing BOM count by ≥7 components while maintaining <1 LSB INL over temperature. |
Use Scenario: 35mm transparency scanning requiring low-noise analog conditioning of weak CCD signals under controlled illumination. IC Role / Device Role / Timing Role: Front-end processor applying programmable 5.7× gain and ±350 mV offset trim to maximize dynamic range utilization of 14-bit ADC. Use Value: Achieves 1.5 LSB rms noise floor at minimum PGA gain-enabling detection of fine grain structure without post-processing amplification. |
| Digital Color Copiers | Multifunction Peripherals (MFP) |
Use Scenario: Real-time color separation and tonal correction in high-volume office copiers using contact image sensor (CIS) arrays. IC Role / Device Role / Timing Role: Configurable as 1-channel SHA mode to process monochrome CIS output with user-adjustable offset and gain per job type. Use Value: Supports fast mode switching via serial interface-enabling on-the-fly adaptation from reflective document to transparent film scanning within same hardware platform. |
Use Scenario: Shared imaging engine serving print, scan, and fax functions in compact desktop MFPs with thermal management constraints. IC Role / Device Role / Timing Role: Low-power analog processor consuming only 385 mW at full speed and dropping to <150 µA in power-down mode between scan jobs. Use Value: Enables fanless enclosure design and meets ENERGY STAR standby power requirements without sacrificing 14-bit fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CCD/CIS signal processing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA1771 | 12-bit resolution, fixed 2× gain, no programmable offset, requires external reference | Limited to lower-fidelity grayscale scanning; lacks RGB channel independence | Select when cost sensitivity outweighs 14-bit fidelity and multi-sensor flexibility needs. |
| AD9826 | 16-bit ADC, 20 MSPS max, 3.3 V digital I/O only, no 3/5 V compatibility | Requires level-shifting for legacy 5 V microcontrollers; higher power (520 mW) | Select for next-gen systems needing extended dynamic range and future-proof resolution, accepting revised power and interface constraints. |
Compared with TDA1771 and AD9826, AD9822JRSRL uniquely balances 14-bit accuracy, 3/5 V I/O compatibility, per-channel programmability, and sub-400 mW power in a single SSOP package-making it optimal for cost-sensitive, space-constrained, and multi-sensor imaging platforms requiring field-upgradable calibration.
Availability
AD9822JRSRL is available at Aetrix Electronics and suitable for flatbed document scanners, film scanners, and digital color copiers requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for AD9822JRSRL 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, headquartered in Norwood, MA, with R&D and manufacturing operations worldwide.
The AD9822JRSRL belongs to Analog Devices' Imaging Signal Processor product line, designed specifically for high-fidelity, low-noise digitization of CCD, CIS, and CMOS active pixel sensor outputs in professional and consumer imaging equipment.
FAQ
What is the maximum pixel rate supported by AD9822JRSRL in 3-channel CDS mode?
The AD9822JRSRL supports a maximum pixel rate of 15 MSPS in 3-channel CDS mode, corresponding to 5 MHz per channel. This is confirmed in Table 1 of the Rev. B datasheet under "Maximum Conversion Rate" and validated by timing constraint tPRA = 67 ns. At this rate, AD9822JRSRL maintains full 14-bit no-missing-codes performance with ≤1 LSB crosstalk between RGB channels.
Does AD9822JRSRL require an external voltage reference?
No, AD9822JRSRL includes an internal bandgap voltage reference (1.0 V ±6% between CAPT and CAPB) that sets the 2 V full-scale ADC range. The Configuration Register bit D6 controls reference selection: set high to enable internal reference (default), or low to disable it and use an external reference. AD9822JRSRL operates correctly without any external reference component.
Can AD9822JRSRL be used with contact image sensors (CIS) instead of CCDs?
Yes, AD9822JRSRL supports CIS operation via its SHA (sample-and-hold) mode. In SHA mode, CDSCLK1 is grounded and CDSCLK2 samples the CIS output directly relative to the OFFSET pin voltage. The datasheet explicitly states CDS amplifiers may be disabled for CIS and CMOS APS sensors. AD9822JRSRL's programmable offset and gain remain fully functional in this mode.
What is the function of the OFFSET pin on AD9822JRSRL?
The OFFSET pin on AD9822JRSRL serves as a coarse analog bias node. In SHA mode, it defines the reference level for single-ended sampling-applying a voltage here subtracts directly from VINR, VING, and VINB inputs in the first amplifier stage. In CDS mode, it decouples the internal clamp bias. External 1 µF+ capacitor is required at OFFSET for stability, as specified in Figure 10 and the Applications section.
How is the 14-bit ADC output formatted on the D7–D0 bus of AD9822JRSRL?
AD9822JRSRL uses an 8+6 multiplexed output format: the 14-bit result is split into a high byte (DB13–DB6) and low byte (DB5–DB0), delivered sequentially on D7–D0. Two read cycles are required per pixel-first cycle outputs high byte, second outputs low byte-with OEB controlling bus enable. Latency is fixed at three ADCCLK cycles, as confirmed in Table 3 and Figure 7.
AD9822JRSRL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- CCD Signal Processor, 14-Bit
- Input Type:
- Logic
- Output Type:
- Logic
- Current - Supply:
- 73 mA
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SSOP
AD9822JRSRL FAQ
1.How can I place an order for AD9822JRSRL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9822JRSRL 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 AD9822JRSRL reliable?
The price and inventory of AD9822JRSRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9822JRSRL is usually 5 days.
3.What payment methods are accepted for AD9822JRSRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9822JRSRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9822JRSRL?
AD9822JRSRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9822JRSRL 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 AD9822JRSRL?
For technical support, including AD9822JRSRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9822JRSRL requirements.
6.How does Aetrix verify that AD9822JRSRL is sourced from the original manufacturer or authorized distributors?
All AD9822JRSRL 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 AD9822JRSRL meets industry standards.
7.What is the process for return or replacement of AD9822JRSRL?
All AD9822JRSRL units undergo pre-shipment inspection (PSI). If there is an issue with AD9822JRSRL, 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 AD9822JRSRL part is unused and in its original packaging.
Return procedure for AD9822JRSRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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