ADA4800ACPZ-R7

Overview

The ADA4800ACPZ-R7 is a low power, high speed CCD buffer amplifier manufactured by Analog Devices Inc. It integrates an active load with a unity gain voltage buffer in a 6-lead LFCSP package. The device operates on supply voltages ranging from 4 V to 17 V and functions within an industrial temperature range of -40°C to +85°C. Key electrical specifications include a maximum slew rate of 415 V/μs and a typical -3 dB bandwidth of 400 MHz when configured for optimal performance. The input bias current is specified at 1 μA, while the quiescent supply current is approximately 1.4 mA. The output stage utilizes a push-pull architecture to provide drive capability for both rising and falling signal transitions.

Feature Summary

• Integrates a fixed gain of 1 voltage buffer with an adjustable active current load for CCD sensor interfacing.
• Features a power save mode that allows logical control of the active load current via the ISF pin to reduce static power consumption.
• Employs a push-pull output stage architecture providing high slew rate and fast settling time for accurate signal reproduction.
• Allows full adjustment of buffer bandwidth and quiescent current through the IDRV pin connection.

Applications

• CCD image sensor output buffering
• Digital still camera signal chains
• Camcorder video processing circuits

Procurement Notes

Verify the specific ordering suffix corresponds to the required tape and reel quantity configuration. Confirm RoHS compliance status matches project environmental requirements. Ensure the LFCSP-6 footprint dimensions align with the PCB layout guidelines provided in the datasheet outline drawing. Validate that the operating temperature range meets the intended application environment constraints.

Selection Notes

Select this component when driving open-source CCD sensors requiring integrated active loading. Consider the adjustable bandwidth feature if system noise or stability requires tuning the frequency response. Evaluate the power save functionality if standby current reduction is critical. Ensure the supply voltage range accommodates the specific sensor and analog front-end interface requirements.

Part Context

This part belongs to the ADA4800 series of charge-coupled device buffer amplifiers. It is designed specifically for applications requiring low power consumption alongside high-speed signal integrity. The integration of the active load simplifies the external circuit design compared to discrete solutions. It serves as an interface between CCD outputs and subsequent analog-to-digital conversion stages.

Replacement Considerations

ADA4800ACPZ-R2

FAQ

How is the buffer bandwidth adjusted?

The bandwidth is controlled by connecting an external resistor between the IDRV pin and a voltage source (such as VCC). Adjusting this resistance changes the quiescent current (ICC), which directly influences the -3 dB bandwidth.

What is the function of the ISF pin?

The ISF pin sets the value of the active current load (IAL) connected to the input. It can also be used to enable a power save mode by disconnecting the active load current when a logic low or negative voltage is applied.

Can the active load be disabled independently of the buffer?

Yes, the active load current can be switched off using the ISF pin while the buffer continues to operate as a standard unity gain amplifier. This allows the device to function solely as a buffer without loading the sensor.