XRD9814B 3-Channel 14/16-Bit Linear CCD/CIS Sensor Signal Processor
The XRD9814B is a fully integrated, high-performance analog signal processor/digitizer specifically designed for use in 3-channel linear Charge Coupled Device (CCD) and Contact Image Sensitive (CIS) imaging applications. Each channel of the XRD9814B includes a Correlated Double Sampler (CDS), Programmable Gain Amplifier (PGA) and channel offset adjustment. After gain and offset adjustment, the analog inputs are sequentially sampled and digitized by an accurate 14-bit A/D converter. The analog front-end can be configured for inverting/non-inverting input, CDS or sample-hold (S/H) mode, or AC/DC coupling, making the XRD9814B suitable for use in CCD, CIS and other data acquisition applications. The CDS mode of operation supports both line and pixel-clamp modes and can be used to achieve significant reduction in system 1/f noise and CCD reset clock feed-through. In S/H mode the internal DCrestore voltage clamp can be enabled or disabled to support AC-coupled or DC inputs. Sampling mode, 10-bit PGA gain (1024 linear steps), 8-bit fine offset adjustment (256 linear steps), 2-bit gross offset adjustment and input signal polarity are all programmable through a serial interface. PGA gain range is 1 to 10, and channel offset range is -300mV to 300mV for fine adjustment and additional -400mV to +200mV for gross offset adjustment. The A/D Full-Scale Range (FSR) is programmable to 2V or 3V.
技术特性
- 14-Bit A/D Converter
- Triple-Channel, 2.5 MSPS Color Scan Mode
- Single-Channel, 6 MSPS Monochrome Scan Mode
- Triple Correlated Double Sampler
- Triple 10-Bit Programmable Gain Amplifier
- Triple 10-Bit Offset Compensation DAC
- Fully Differential or Single-Ended Inputs
- CDS or S/H Mode
- Inverting or Non-Inverting Mode
- Internal Voltage Reference
- Serial Control: On Data Bus or Separate Pins
- Improved PGA Performance
- 14-Bit or 8-Bit (Nibble) Parallel Data Output
- 5V Operation and 3V I/O Compatibility
- Low Power CMOS: 500mW @ 5V
- Pb-Free, RoHS Compliant Versions Offered
订购信息 Ordering Information
应用领域 APPLICATION
- 42-Bit Color Scanners)
- CCD or CIS Color Imagers
- Gray Scale Scanners
- Film Scanners
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技术指标
| 频道数量 |
3 |
| CDS(CCD Input) |
Yes |
| S&H/T&H(CIS Input) |
Yes |
| PGA解析度 |
10-Bit |
| 抵消范围 |
10-Bit |
| A/D解析度 |
14-Bit |
| A/D速度 |
6-MSPS |
| 电压供应 |
5V |
| 电力(Typ) |
500mW |
| 封装 |
LQFP-48 |
功能框图 Functional Block Diagram
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