Overview
The AD9840AJSTZ is a complete 10-bit, 40 MSPS (Mega Samples Per Second) CCD (Charge-Coupled Device) signal processor designed by Analog Devices Inc. This component is tailored for applications involving CCD arrays, particularly in digital video camcorders, digital still cameras, and industrial imaging systems. The AD9840A features a single-channel architecture that includes an input clamp, correlated double sampler (CDS), digitally controlled variable gain amplifier (VGA), black level clamp, and a 10-bit A/D converter. It operates from a 3 V power supply and is packaged in a 48-lead LQFP (Low Profile Quad Flat Package).
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Temperature Range (Operating) | -20 | +85 | °C | |
| Temperature Range (Storage) | -65 | +150 | °C | |
| Power Supply Voltage | 2.7 | 3.0 | 3.6 | V |
| Power Consumption (Normal Operation) | 155 | mW | ||
| Power Consumption (Power-Down Modes) | ||||
| Fast Recovery Mode | 90 | mW | ||
| Standby | 5 | mW | ||
| Total Power-Down | 1 | mW | ||
| Maximum Clock Rate | 40 | MHz | ||
| A/D Converter Resolution | 10 | Bits | ||
| Differential Nonlinearity (DNL) | ±0.5 | ±1.0 | LSB | |
| Full-Scale Input Voltage | 2.0 | V | ||
| Logic Input High Level Voltage | 2.1 | V | ||
| Logic Input Low Level Voltage | 0.6 | V |
Key Features
- Correlated Double Sampler (CDS) with 4 dB to 6 dB variable gain and 6-bit resolution
- 10-bit Variable Gain Amplifier (VGA) with 2 dB to 36 dB gain range
- Low noise clamp circuits and analog preblanking function
- 10-bit, 40 MSPS A/D converter with straight binary data output coding
- Auxiliary inputs with VGA and input clamp for processing analog video signals
- 3-wire serial digital interface for programming internal registers
- Single 3 V power supply operation with low power consumption (155 mW at 3.0 V)
- 48-lead LQFP package
Applications
- Digital video camcorders
- Digital still cameras
- Industrial imaging systems
Q & A
- What is the primary function of the AD9840AJSTZ? The AD9840AJSTZ is a complete analog signal processor designed for CCD applications, particularly in digital video and imaging systems.
- What is the resolution and sampling rate of the A/D converter in the AD9840AJSTZ? The A/D converter has a resolution of 10 bits and a sampling rate of 40 MSPS.
- What is the power supply voltage and power consumption of the AD9840AJSTZ? The component operates from a 3 V power supply and typically consumes 155 mW at 3.0 V.
- What are the key components in the signal chain of the AD9840AJSTZ? The signal chain includes an input clamp, correlated double sampler (CDS), digitally controlled variable gain amplifier (VGA), black level clamp, and a 10-bit A/D converter.
- How is the AD9840AJSTZ programmed? The internal registers are programmed through a 3-wire serial digital interface.
- What are the typical applications of the AD9840AJSTZ? Typical applications include digital video camcorders, digital still cameras, and industrial imaging systems.
- What is the package type of the AD9840AJSTZ? The component is packaged in a 48-lead LQFP (Low Profile Quad Flat Package).
- What is the temperature range for the AD9840AJSTZ? The operating temperature range is -20°C to +85°C, and the storage temperature range is -65°C to +150°C.
- Does the AD9840AJSTZ support power-down modes? Yes, it supports fast recovery mode, standby, and total power-down modes.
- What is the differential nonlinearity (DNL) performance of the A/D converter? The DNL performance is typically better than ±0.5 LSB.
