Figure 4-3 shows the current sink characteristics lower voltages in greater detail. The area in quadrant 4 illustrates the reverse polarity diode characteristics of each output. Do not operate any output with reverse-voltage currents that are greater than the maximum rating of the output.

Figure 4-3. Typical Downprogramming Characteristic Below 2.0 V

Operating Ranges

Notice in Figure 4-2, there are four overlapping areas in quadrant one for both the 25 watt and 50 watt outputs. The Low Range Voltage and Low Range Current ranges are higher precision than the High Range Voltage and High Range Current ranges. The voltage and current ranges can be set independently (see page 73). If the high resolution range is programmed, attempting to program values outside this range will result in a number range error.

The 50 watt output (Figure 4-2B) is different from the 25 watt output (Figure 4-2A), in that there is a power limiting boundary at 1 amp in the High Voltage/High Current range. As a result, the 50 watt output can be set to no more than 1.03 amps at voltage settings above 16.16 volts, and vice versa.

Setting parameters of voltage or current beyond this power limit boundary, but within the High Voltage/High Current range will cause the other parameter (voltage or current) to automatically be scaled down to the power limiting boundary (see pages 71 and 73).

The voltage and current programming resolution of the outputs is affected by the setting of the range. The voltage of the 25 watt output, when programmed to the Low Voltage Range, has a voltage programming resolution of 460 μV. When programmed above 7 volts, the High Voltage Range must be selected resulting in a programming resolution of 3.2 mV.

The current of the 25 watt output, when programmed to the High Current Range, has a current programming resolution of 1 μA. When programming above 15 mA, the High Current Range must be selected, resulting in a programming resolution of 33 μA.

The voltage of the 50 watt output, when programmed to the High Voltage Range, has a voltage programming resolution of 1 mV. When programming above 16.16 volts, the high range must be selected, resulting in a programming resolution of 3.2 mV.

The current of the 50 watt output, when programmed to the High Current Range, has a current programming resolution of 13 μA. When programmed above 200 mA, the High Current Range must be selected, resulting in a programming resolution of 131 μA.

The readback range of the outputs is not programmable, and is selected automatically by the power supply.

Output Connections and Operating Information 47

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Agilent Technologies 6629A, 6626A, 6628A, 6625A manual Output Connections and Operating Information
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6629A, 6625A, 6626A, 6628A specifications

Agilent Technologies, a recognized leader in electronic test and measurement solutions, has developed a series of precision power supplies ideal for a variety of applications in both research and industry. The Agilent 6628A, 6626A, 6625A, and 6629A are part of the Agilent 6000 series and stand out due to their innovative technologies and robust functionalities.

The Agilent 6628A is a triple-output power supply, featuring two 0 to 20 V outputs capable of delivering up to 3 A each, along with a 5 V output that can supply 5 A. This combination is perfect for supplying power to devices that require multiple supply voltages simultaneously, making it an excellent choice for testing and development purposes.

The Agilent 6626A, on the other hand, offers dual output capabilities with higher specifications. Each of its outputs can be adjusted from 0 to 25 V and delivers up to 3 A, providing enhanced flexibility for designers and engineers working with various devices. Additionally, the 6626A's compact size and lightweight design make it easy to integrate into test setups without occupying excessive space.

For applications that require comprehensive monitoring, the Agilent 6625A provides a unique solution with its built-in digital voltmeter (DVM). This power supply comes with two 0 to 25 V outputs, both capable of 3 A. The integrated DVM allows real-time measurement and displays voltage and current values, ensuring accurate readings during experimentation and testing.

Lastly, the Agilent 6629A is designed for high-performance applications, providing up to four outputs, including two adjustable outputs that can be set between 0 to 35 V and deliver 5 A each. This model is particularly suited for environments where multiple devices need to be powered simultaneously with varying voltage requirements.

All four models come equipped with key features including ease of programming, precision regulation, and superior load transient response. They employ advanced technologies like low-noise operation and excellent line regulation, ensuring stable performance under varying load conditions. Additionally, safety features such as overvoltage protection, current limiting, and rapid recovery from overloads guarantee reliable operation.

In summary, Agilent's 6628A, 6626A, 6625A, and 6629A power supplies provide versatile, precise, and reliable solutions for all electronic testing needs. Their characteristics and dedicated functionalities make them indispensable tools for engineers, researchers, and developers across numerous fields. Whether it's for prototyping, testing, or production, these power supplies deliver the quality and performance that professionals expect from Agilent Technologies.
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