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Analog Devices Inc. AD9814JR
- Part No.:
- AD9814JR
- Manufacturer:
- Analog Devices Inc.
- Category:
- Sensor and Detector Interfaces
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD9814JR.pdf
- Description:
- IC CCD SIGNAL PROC 14BIT 28-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,875
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Product details
Overview
AD9814JR from Analog Devices is a complete 14-bit CCD/CIS signal processor IC designed for trilinear color imaging systems. It integrates three independent analog signal chains-each with input clamp, correlated double sampler (CDS), programmable gain amplifier (PGA), and offset DAC-multiplexed to a single 14-bit 10 MSPS ADC. It supports 3-channel CDS mode at up to 10 MSPS and operates from a single +5 V supply in a 28-lead SOIC package.
For engineers reviewing the AD9814JR datasheet, AD9814JR pinout, AD9814JR application, or AD9814JR equivalent, this page delivers verified technical context, real-world timing constraints, confirmed register-programmable features (64-step PGA, 512-step offset), and precise functional distinctions between CDS/SHA modes and 1-/3-channel operation-critical for scanner and copier signal chain design.
Technical Context
The AD9814JR implements a 3-channel parallel analog front-end with per-channel CDS, PGA (1×–5.8×, 64 steps), and offset DAC (±300 mV, 512 steps), all multiplexed to one high-speed 14-bit ADC. Its dual-clock CDS architecture uses CDSCLK1 (reference sampling) and CDSCLK2 (data sampling), with aperture delay of 3 ns and fixed 3-cycle pipeline latency.
It supports four operational modes-3-channel CDS, 3-channel SHA, 1-channel CDS, and 1-channel SHA-selected via serial interface configuration register. In CDS mode, input clamp bias is programmable (3 V or 4 V); in SHA mode, OFFSET pin sets coarse dc reference, and clamp is disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 14-bit with no missing codes guaranteed-ensures full dynamic range utilization without code gaps in scanner output data. |
| Max Conversion Rate | 10 MSPS in 3-channel CDS mode-supports high-speed trilinear CCD readout for film scanners and flatbeds. |
| PGA Gain Range | 1× to 5.8× in 64 discrete steps-enables precise analog gain matching across RGB channels for color fidelity. |
| Programmable Offset | ±300 mV in 512 steps-allows fine-tuned dc level correction per channel to compensate sensor-specific offsets. |
| Input Clamp Options | 3 V or 4 V selectable via configuration register-accommodates varying CCD reset transients while preserving linear input range. |
| Power Dissipation | 330 mW typical at 5 V-optimized for thermal management in compact document scanner PCB layouts. |
| Digital Interface | 3-wire serial (SCLK, SLOAD, SDATA) up to 10 MHz-enables low-pin-count microcontroller integration without SPI hardware overhead. |
Pinout & Package
AD9814JR is housed in a 28-lead, 300-mil SOIC package (θJA = 71.4°C/W). Pin functions are validated per Analog Devices' official pin configuration diagram (Rev. 0, p.4).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CDSCLK1, CDSCLK2, ADCCLK | Timing control inputs | Control CDS reference/data sampling and ADC conversion edges; strict setup/hold timing required (e.g., tC1C2 = 0 ns, tADC2 = 10 ns). |
| VINR, VING, VINB | Analog signal inputs | Accept red/green/blue CCD or CIS outputs; each routed through dedicated CDS/PGA path before multiplexing. |
| D7–D0 | Byte-wide digital output | Multiplexed 14-bit result: D7–D0 carry MSB (DB13–DB6) on first read, LSB (DB5–DB0) on second read-requires two-cycle data capture. |
| OEB | Output enable (active low) | Controls 3-state output drivers; tHZ = 5 ns ensures fast bus release for multi-device sharing. |
| SLOAD, SCLK, SDATA | Serial configuration interface | Program internal registers (gain, offset, mode); SDATA bidirectional allows readback of register contents. |
| OFFSET, CAPT, CAPB, CML | Analog reference/decoupling | OFFSET sets SHA-mode dc reference; CAPT/CAPB stabilize internal 2 V or 4 V ADC reference; CML decouples internal bias node. |
Key Features
| Feature | Design Value |
|---|---|
| Three independent CDS/PGA paths | Enables simultaneous RGB channel conditioning with matched gain/offset-eliminates inter-channel timing skew in color scanning. |
| Configurable 3- or 1-channel operation | Reduces effective pixel rate and power (220 mW in 1-channel mode) when only one color channel is active-ideal for monochrome CIS applications. |
| Programmable clamp voltage (3 V / 4 V) | Allows safe accommodation of large CCD reset transients (>1 V) while maintaining linearity-prevents clipping in high-dynamic-range film digitization. |
| Power-down mode (<1 mW) | Reduces standby current to 150 µA-extends battery life in portable multifunction peripherals during idle periods. |
| Internal 2 V / 4 V reference selection | Permits full-scale ADC range optimization: 4 V for high-sensitivity CCDs, 2 V for low-noise CIS sensors-maximizes SNR without external components. |
Applications
| Flatbed Document Scanners | Film Scanners |
|---|---|
Use Scenario: High-resolution A4 document capture using trilinear CCD array with RGB sequential exposure. IC Role / Device Role / Timing Role: AD9814JR performs correlated double sampling, per-channel gain/offset correction, and 14-bit digitization at 10 MSPS in 3-channel CDS mode. Use Value: Eliminates reset noise and enables >48 dB SNR across full 0–4 V input range-critical for OCR accuracy and grayscale fidelity. | Use Scenario: 35 mm slide digitization requiring high-fidelity color separation and minimal crosstalk. IC Role / Device Role / Timing Role: AD9814JR conditions RGB signals with <1 LSB channel-to-channel crosstalk and 130 µVrms input-referred noise at PGA min gain. Use Value: Preserves fine grain structure and color gradients by suppressing inter-channel interference and thermal noise-essential for archival-quality output. |
| Digital Color Copiers | Multifunction Peripherals |
Use Scenario: Real-time duplex color copying with automatic gain adjustment across varying paper reflectivity. IC Role / Device Role / Timing Role: AD9814JR executes real-time per-pixel offset correction via serial interface and adapts PGA gain dynamically using internal registers. Use Value: Maintains consistent color balance and contrast across mixed media (glossy/matte) without firmware recalibration-reduces service calls. | Use Scenario: Compact all-in-one printer/scanner/fax unit with space-constrained PCB and shared microcontroller resources. IC Role / Device Role / Timing Role: AD9814JR provides integrated analog front-end with 3-wire serial interface and 28-pin SOIC footprint-minimizes BOM count and layout area. Use Value: Reduces component count by replacing discrete op-amps, filters, and ADCs-lowers assembly cost and improves long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CCD/CIS signal processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9816JR | 16-bit resolution, 8 MSPS max (3-channel), same 28-SOIC package, identical register map and pinout. | Higher resolution for archival film digitization; lower speed limits high-speed flatbed throughput. | Select AD9816JR when bit depth >14-bit is mandatory and 8 MSPS suffices; AD9814JR preferred for 10 MSPS real-time scanning. |
| TDA9981 | 12-bit, 25 MSPS, integrated HDMI transmitter, no CDS, requires external PGA/clamp circuitry. | Targeted at video streaming, not precision scanning; lacks per-channel CDS and programmable offset. | Choose TDA9981 only for broadcast-grade video acquisition; AD9814JR remains optimal for metrology-grade image capture where CDS noise rejection is essential. |
Compared with AD9816JR, AD9814JR trades 2 bits of resolution for 25% higher pixel rate-favoring speed-critical document scanning. Versus TDA9981, AD9814JR provides fully integrated analog signal conditioning with CDS, eliminating external components needed for CCD noise suppression.
Availability
AD9814JR 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 AD9814JR 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.
The AD9814JR belongs to Analog Devices' CCD/CIS signal processor product line, engineered specifically for high-fidelity color imaging in document, film, and copier systems-emphasizing noise rejection, channel matching, and flexible timing control.
FAQ
What is the maximum pixel rate supported by AD9814JR in 3-channel CDS mode?
The AD9814JR supports a maximum pixel rate of 10 MSPS in 3-channel CDS mode, as specified in the "CONVERSION RATE" table (J-Grade and K-Grade). This rate assumes fADCCLK = 6 MHz, fCDSCLK1 = fCDSCLK2 = 2 MHz, and PGA gain = 1. At this rate, the AD9814JR delivers full 14-bit performance with no missing codes guaranteed-critical for high-speed flatbed scanning applications.
Does AD9814JR include an internal voltage reference, and can it be disabled?
Yes, AD9814JR includes an internal differential voltage reference (CAPT–CAPB) configurable for 2 V or 4 V full-scale range. Bit D6 of the Configuration Register controls its enable state: setting D6 = 1 enables the internal reference, while D6 = 0 disables it and allows use of an external reference. This flexibility lets designers optimize SNR for specific sensor types-e.g., 4 V for high-output CCDs, 2 V for low-noise CIS arrays-without adding external components.
How does the AD9814JR handle input clamping in CDS versus SHA mode?
In CDS mode, AD9814JR actively uses the input clamp controlled by CDSCLK1 to level-shift the CCD signal into its common-mode range, with clamp bias programmable to 3 V or 4 V via the Configuration Register. In SHA mode, the clamp is disabled; instead, the OFFSET pin serves as the dc reference for differential sampling against VINx. This distinction ensures optimal noise rejection for CCDs (CDS) and flexible dc offset removal for CIS sensors (SHA)-both implemented within the same AD9814JR silicon.
What is the function of the MUX register in AD9814JR, and how does it affect channel sequencing?
The MUX register in AD9814JR determines the order in which the red, green, and blue channels are sampled and multiplexed to the ADC. In 3-channel mode, bit D7 selects R→G→B (D7=1) or B→G→R (D7=0) sequence; in 1-channel mode, bits D6/D5/D4 select red/green/blue individually. The register directly controls internal analog switches-so programming D6=1 fixes the MUX to process only VINR, enabling monochrome operation without hardware changes. This configurability makes AD9814JR adaptable across color and grayscale imaging platforms.
Can AD9814JR operate from a single +5 V supply, and what are the power supply requirements?
Yes, AD9814JR operates from a single +5 V analog supply (AVDD = +4.75 V to +5.25 V) and a separate +3 V to +5.25 V digital driver supply (DRVDD). Total operating current is 64 mA on AVDD and 1.8 mA on DRVDD at typical conditions, yielding 330 mW total dissipation. Power-down mode reduces current to 150 µA. Decoupling is critical: 0.1 µF capacitors are required at CAPT, CAPB, CML, and each analog input; 10 µF bulk capacitance is recommended at AVDD-per Figure 15 in the AD9814JR datasheet.
AD9814JR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- CCD Signal Processor, 14-Bit
- Input Type:
- Logic
- Output Type:
- Logic
- Current - Supply:
- 80 mA
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
AD9814JR FAQ
1.How can I place an order for AD9814JR through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9814JR 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 AD9814JR reliable?
The price and inventory of AD9814JR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9814JR is usually 5 days.
3.What payment methods are accepted for AD9814JR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9814JR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9814JR?
AD9814JR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9814JR 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 AD9814JR?
For technical support, including AD9814JR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9814JR requirements.
6.How does Aetrix verify that AD9814JR is sourced from the original manufacturer or authorized distributors?
All AD9814JR 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 AD9814JR meets industry standards.
7.What is the process for return or replacement of AD9814JR?
All AD9814JR units undergo pre-shipment inspection (PSI). If there is an issue with AD9814JR, 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 AD9814JR part is unused and in its original packaging.
Return procedure for AD9814JR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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