Overview
The AD9814JR, produced by Analog Devices Inc., is a complete 14-bit analog signal processor designed specifically for CCD (Charge-Coupled Device) and CIS (Contact Image Sensor) imaging applications. This device features a 3-channel architecture, each channel consisting of an input clamp, correlated double sampler (CDS), offset DAC, and a programmable gain amplifier (PGA), all multiplexed to a high-performance 14-bit A/D converter. The AD9814JR operates from a single +5 V power supply and is packaged in a 28-lead SOIC, making it suitable for various imaging systems.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Conversion Rate (3-Channel Mode with CDS) | 6 | 10 | 10 | MSPS |
| Conversion Rate (1-Channel Mode with CDS) | 6 | 7 | 7 | MSPS |
| Power Supply (AVDD, DRVDD) | +4.75 | +5.0 | +5.25 | V |
| Total Operating Current (AVDD) | 64 | 64 | 80 | mA |
| Total Operating Current (DRVDD) | 1.8 | 1.8 | 10 | mA |
| Power Dissipation | 330 | 330 | 450 | mW |
| Power-Down Mode Current | 150 | 150 | - | µA |
| Storage Temperature | -65 | - | +150 | °C |
Key Features
- 14-bit A/D converter with no missing codes guaranteed
- 3-channel operation up to 10 MSPS and 1-channel operation up to 7 MSPS
- Correlated Double Sampling (CDS) with 1-6x programmable gain and ±300 mV programmable offset
- Input clamp circuitry and internal voltage reference
- Multiplexed byte-wide output (8+6 format) and 3-wire serial digital interface
- +3/+5 V digital I/O compatibility
- Low power CMOS design with 330 mW typical power consumption and <1 mW in power-down mode
- 28-lead SOIC package
Applications
- Flatbed document scanners
- Film scanners
- Digital color copiers
- Multifunction peripherals
Q & A
- What is the primary function of the AD9814JR? The AD9814JR is a complete analog signal processor designed for CCD and CIS imaging applications.
- How many channels does the AD9814JR have? The AD9814JR features a 3-channel architecture.
- What is the resolution of the A/D converter in the AD9814JR? The A/D converter is 14-bit.
- What is the maximum conversion rate for 3-channel operation with CDS? The maximum conversion rate is 10 MSPS.
- What is the power supply requirement for the AD9814JR? The device operates from a single +5 V power supply.
- What is the typical power consumption of the AD9814JR? The typical power consumption is 330 mW.
- What is the package type of the AD9814JR? The device is packaged in a 28-lead SOIC.
- What are some common applications of the AD9814JR? Common applications include flatbed document scanners, film scanners, digital color copiers, and multifunction peripherals.
- Does the AD9814JR support power-down mode? Yes, the AD9814JR has a power-down mode with a current consumption of less than 1 mW.
- How is the gain and offset adjusted in the AD9814JR? The gain, offset, and operating mode are adjusted through a 3-wire serial interface.
