Overview
The AD9822JRSZ, produced by Analog Devices Inc., is a complete 14-bit CCD/CIS (Charge-Coupled Device/Contact Image Sensor) signal processor. This component is designed for CCD imaging applications and features a 3-channel architecture to sample and condition the outputs of trilinear color CCD arrays. Each channel includes an input clamp, correlated double sampler (CDS), offset DAC, and a programmable gain amplifier (PGA) multiplexed to a high-performance 14-bit ADC. The AD9822JRSZ is suitable for various imaging applications due to its versatile design and low power consumption.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Maximum Conversion Rate (3-Channel Mode with CDS) | - | 15 | - | MSPS |
| Maximum Conversion Rate (1-Channel Mode with CDS) | - | 12.5 | - | MSPS |
| ADC Resolution | - | 14 Bits | - | - |
| Integral Nonlinearity (INL) | -17.0 | - | +3.5 LSB | - |
| Differential Nonlinearity (DNL) | -0.65 | - | +0.75 LSB | - |
| Offset Error | -240 | -19 | +200 mV | - |
| Gain Error | -1.4 | - | +6.9 % FSR | - |
| Power Consumption | - | 385 mW | - | - |
| Power-Down Mode | - | <1 mW | - | - |
| Package Type | - | 28-Lead SOIC or SSOP | - | - |
Key Features
- 3-channel architecture for sampling and conditioning CCD array outputs.
- Correlated double sampler (CDS) and programmable gain amplifier (PGA) for each channel.
- High-performance 14-bit ADC with multiplexed byte-wide output (8 + 6 format).
- 3-wire serial digital interface for register programming.
- 3 V/5 V digital I/O compatibility.
- Low power CMOS design with power-down mode.
- Input clamp, offset DAC, and gain adjustment capabilities.
Applications
- Flatbed document scanners.
- Film scanners.
- Digital color copiers.
- Multifunction peripherals.
Q & A
- What is the primary function of the AD9822JRSZ?
The AD9822JRSZ is a complete analog signal processor designed for CCD imaging applications, sampling and conditioning the outputs of trilinear color CCD arrays. - What is the resolution of the ADC in the AD9822JRSZ?
The ADC resolution is 14 bits. - What are the typical power consumption and power-down mode values for the AD9822JRSZ?
The typical power consumption is 385 mW, and the power-down mode is less than 1 mW. - What types of packages are available for the AD9822JRSZ?
The component is available in 28-Lead SOIC or SSOP packages. - Can the CDS amplifiers be disabled in the AD9822JRSZ?
Yes, the CDS amplifiers can be disabled for use with sensors such as contact image sensors (CIS) and CMOS active pixel sensors. - What is the maximum conversion rate for the 3-channel mode with CDS?
The maximum conversion rate for the 3-channel mode with CDS is 15 MSPS. - How is the digital output accessed in the AD9822JRSZ?
The 14-bit digital output is multiplexed into an 8-bit output word that is accessed using two read cycles. - What is the compatibility of the digital I/O in the AD9822JRSZ?
The digital I/O is compatible with both 3 V and 5 V systems. - What types of applications is the AD9822JRSZ suitable for?
The AD9822JRSZ is suitable for flatbed document scanners, film scanners, digital color copiers, and multifunction peripherals. - How is the internal register programming done in the AD9822JRSZ?
The internal registers are programmed through a 3-wire serial interface.
