Analog Devices Inc. AD9814JRRL

Overview

AD9814JRRL from Analog Devices is a complete 14-bit CCD/CIS signal processor IC designed for trilinear color imaging front-ends. It integrates three independent analog signal chains-each with input clamp, correlated double sampler (CDS), 6-bit programmable gain amplifier (PGA), and 9-bit offset DAC-multiplexed to a single 14-bit 10 MSPS ADC. It operates in 3-channel CDS mode at up to 10 MSPS or 1-channel mode at up to 7 MSPS, targeting flatbed and film scanner signal conditioning.

For engineers reviewing the AD9814JRRL datasheet, AD9814JRRL pinout, AD9814JRRL application, or AD9814JRRL equivalent, this page delivers verified functional identity, SOIC-28 package mapping, real-world timing constraints (e.g., tC2ADF ≤ 50 ns, tADC2 ≥ 10 ns), confirmed 3-wire serial interface behavior, and validated alternative options for CCD signal chain design.

Technical Context

The AD9814JRRL implements a configurable dual-sampling architecture: CDSCLK1 samples CCD reference level, CDSCLK2 samples data level, and ADCCLK triggers final digitization-enabling true correlated double sampling per channel. Its internal 2.0 V differential reference (CAPT–CAPB) supports 4 V p-p linear input range with ±104 mV offset error and ±5.3% FSR gain error.

Three independent PGA channels provide 1× to 5.8× gain in 64 discrete steps via register-programmed binary codes; offset is adjustable from –300 mV to +300 mV in 512 sign-magnitude steps. The multiplexed 8+6-bit digital output requires two read cycles per 14-bit sample, with fixed 3-cycle pipeline latency and OEB-controlled 3-state output timing (tHZ = 5 ns, tDV = 16 ns).

Key Specifications

Pinout & Package

AD9814JRRL is housed in a 28-lead 300-mil SOIC package (JEDEC MS-012AC) with exposed pad not present; thermal resistance θ_JA = 71.4°C/W. Pin functions are electrically isolated between analog (AVDD/AVSS), digital driver (DRVDD/DRVSS), and mixed-signal domains (CDSCLK1, VINR, D7–D0, etc.).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CCD signal processor applications.

Compared with TDA1771 and AD9826, AD9814JRRL uniquely combines 14-bit accuracy, integrated triple-CDS, per-channel programmable gain/offset, and serial configurability in a single SOIC-28 package-making it the only direct fit for cost-sensitive, space-constrained trilinear color scanner designs requiring calibrated RGB signal conditioning.

Availability

AD9814JRRL is available at Aetrix Electronics and suitable for flatbed document scanners, film scanners, and digital color copiers requiring stable component supply, long-term obsolescence management, and traceable sourcing from authorized channels.

Supply support for AD9814JRRL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.

The AD9814JRRL belongs to Analog Devices' Imaging Signal Processor product line, engineered specifically for high-fidelity digitization of CCD and CIS outputs in office automation and professional imaging equipment.

FAQ

What is the maximum operating frequency of the AD9814JRRL in 3-channel CDS mode?

The AD9814JRRL supports up to 10 MSPS in 3-channel CDS mode, meaning it can process one complete RGB pixel triplet every 100 ns. This timing requires strict adherence to clock setup/hold constraints: CDSCLK2 falling edge must occur no earlier than 10 ns after the previous ADCCLK falling edge (tADC2 ≥ 10 ns), and CDSCLK2 falling to ADCCLK falling delay must be ≤ 50 ns (tC2ADF ≤ 50 ns). The AD9814JRRL achieves this with internal pipeline latency fixed at three ADCCLK cycles.

Does the AD9814JRRL support both CCD and CIS sensors?

Yes, the AD9814JRRL supports both sensor types via configurable operation modes. In CDS mode, it performs correlated double sampling ideal for CCDs with reset-level noise. In SHA mode, it disables the input clamp and uses the OFFSET pin for coarse DC bias subtraction-optimized for CIS sensors with large inherent DC offsets. The AD9814JRRL's dual-mode capability eliminates the need for separate front-end ICs in multi-sensor platforms.

How is the 14-bit output formatted on the AD9814JRRL's D7–D0 pins?

The AD9814JRRL outputs its 14-bit result in multiplexed byte-wide format: the first read cycle delivers bits DB13–DB6 (high byte) on D7–D0, and the second read cycle delivers DB5–DB0 (low byte) on D7–D0, with D7–D2 carrying valid data and D1–D0 unused. This 8+6 structure reduces pin count versus parallel 14-bit interfaces while maintaining compatibility with standard 8-bit microcontrollers via two consecutive reads triggered by ADCCLK edges.

Can the AD9814JRRL's gain and offset be adjusted independently per channel?

Yes, the AD9814JRRL provides fully independent gain and offset control for red, green, and blue channels. Each channel has its own 6-bit PGA register (64 gain steps from 1× to 5.8×) and 9-bit offset register (512 steps from –300 mV to +300 mV, sign-magnitude encoded). These are programmed via the 3-wire serial interface using dedicated register addresses (e.g., address 010b for Red PGA, 101b for Red Offset), enabling precise color channel balancing without cross-talk.

What power supply configurations does the AD9814JRRL require?

The AD9814JRRL requires two independent supplies: AVDD = +4.75 V to +5.25 V (analog core, typical 5.0 V) and DRVDD = +3.0 V to +5.25 V (digital output drivers, typically 5.0 V or 3.3 V for logic compatibility). AVSS and DRVSS are separate ground returns. Total operating current is 64 mA on AVDD and 1.8 mA on DRVDD at 5 V; power-down mode draws only 150 µA, reducing total dissipation to <1 mW.