Overview
The AD9940BSTZRL, produced by Analog Devices Inc., is a high-speed, correlated double sampler designed for high-speed digital imaging applications. This component integrates a programmable timing driver using the Precision Timing core, making it ideal for CCD (Charge-Coupled Device) imaging systems. The AD9940 features a 56 MHz CDS (Correlated Double Sampler) amplifier with 6 dB of fixed gain and includes an internal voltage reference supply. It also provides timing control for all high-speed clocks necessary in CCD imaging systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Temperature Range | -25 | 85 | °C | |
| Storage Temperature Range | -65 | 150 | °C | |
| Maximum Clock Rate | 56 | MHz | ||
| Power Supply Voltage (AVDD, TCVDD, OVDD, DVDD) | 2.7 | 3.0 | 3.6 | V |
| Power Supply Voltage (HVDD, RGVDD) | 2.7 | 3.0 | 3.6 | V |
| Power Dissipation (AFE supplies = 2.7 V, no H or RG drivers) | 105 | mW | ||
| Package Type | 48-Lead LQFP and 48-Lead LFCSP |
Key Features
- High-speed correlated double sampler with a 56 MHz CDS amplifier and 6 dB of fixed gain.
- Integrated programmable timing driver using the Precision Timing core, allowing adjustment of high-speed clocks with a resolution of 0.37 ns.
- Internal voltage reference supply and timing control for all high-speed clocks necessary in CCD imaging systems.
- Output buffers providing drive strength for PCB traces and direct connection to an image signal processor such as the AD9941.
- Fully differential outputs ensuring good signal integrity.
- Single 2.7 V power supply operation with low power dissipation.
- Included H-drivers for H1 to H4, HL, and RG clocks, supporting up to 3.6 V.
- DC restore circuit to reduce large dc offset of the CCD output signal.
Applications
The AD9940BSTZRL is specifically designed for high-speed digital imaging applications, particularly in CCD imaging systems. It is ideal for applications that require the placement of CDS and VGA/ADC circuits on separate PCBs. The component is suitable for various imaging systems where precise timing and high-speed signal processing are critical.
Q & A
- What is the primary function of the AD9940BSTZRL?
The AD9940BSTZRL is a high-speed, correlated double sampler designed for high-speed digital imaging applications, particularly in CCD imaging systems.
- What is the maximum clock rate of the AD9940BSTZRL?
The maximum clock rate of the AD9940BSTZRL is 56 MHz.
- What types of packages are available for the AD9940BSTZRL?
The AD9940BSTZRL is available in 48-Lead LQFP and 48-Lead LFCSP packages.
- What is the power supply voltage range for the AD9940BSTZRL?
The power supply voltage range for the AD9940BSTZRL is 2.7 V to 3.6 V.
- How much power does the AD9940BSTZRL typically dissipate?
The AD9940BSTZRL typically dissipates 105 mW (excluding the H/RG drive current).
- What is the purpose of the Precision Timing core in the AD9940BSTZRL?
The Precision Timing core allows adjustment of high-speed clocks with a resolution of 0.37 ns.
- Does the AD9940BSTZRL include output buffers?
Yes, the AD9940BSTZRL includes output buffers that provide drive strength for PCB traces and direct connection to an image signal processor.
- How does the AD9940BSTZRL handle dc offset in CCD output signals?
The AD9940BSTZRL uses a dc restore circuit to reduce the large dc offset of the CCD output signal.
- What is the significance of the fully differential outputs of the AD9940BSTZRL?
The fully differential outputs of the AD9940BSTZRL ensure good signal integrity when interfaced with differential input devices like the AD9941.
- Can the AD9940BSTZRL be programmed through a serial interface?
Yes, all CCD and AFE timing parameters can be programmed into the AD9940BSTZRL from the system microprocessor through a 3-wire serial interface.
