AD600/AD602–Typical Performance Characteristics

 

0.45

 

 

 

 

 

 

 

 

0.35

 

 

 

 

 

 

 

 

0.25

 

 

 

 

 

 

 

dB

0.15

 

 

 

 

 

 

 

–

–0.05

 

 

 

 

 

 

 

ERROR

 

 

 

 

 

 

 

 

0.05

 

 

 

 

 

 

 

GAIN

–0.15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

–0.25

 

 

 

 

 

 

 

 

–0.35

 

 

 

 

 

 

 

 

–0.45

 

 

 

 

 

 

 

 

–0.7

–0.5

–0.3

–0.1

0.1

0.3

0.5

0.7

GAIN CONTROL VOLTAGE – Volts

Figure 35. Gain Error vs. Gain Control Voltage

 

10.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9.8

 

 

 

 

 

 

 

 

 

 

9.6

 

 

 

 

 

 

 

 

 

ns

9.4

 

 

 

 

 

 

 

 

 

–

 

 

 

 

 

 

 

 

 

 

DELAY

9.2

 

 

 

 

 

 

 

 

 

GROUP

9.0

 

 

 

 

 

 

 

 

 

8.6

 

 

 

 

 

 

 

 

 

 

8.8

 

 

 

 

 

 

 

 

 

 

8.4

 

 

 

 

 

 

 

 

 

 

8.2

 

 

 

 

 

 

 

 

 

 

8.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

–0.7

–0.5

–0.3

–0.1

0.1

0.3

0.5

0.7

GAIN CONTROL VOLTAGE – Volts

Figure 38. AD600 and AD602 Typical Group Delay vs. VC

 

102

 

 

 

 

101

GAIN=40dB

 

 

 

 

 

 

100

 

 

 

– Ω

99

 

 

 

IMPEDANCE

96

 

GAIN=20dB

 

 

98

 

 

 

 

97

 

GAIN=0dB

 

 

 

 

 

INPUT

95

 

 

 

 

 

 

 

 

94

 

 

 

 

93

 

 

 

 

92

 

 

 

 

100k

1M

10M

100M

 

 

FREQUENCY – Hz

 

Figure 41. Input Impedance vs. Frequency

20dB

17dB

0°

–45°

–90°

100k

1M

10M

100M

FREQUENCY – Hz

Figure 36. AD600 Frequency and Phase Response vs. Gain

VG =0V 10dB/DIV

CENTER FREQ 1MHz 10kHz/DIV

Figure 39. Third Order Intermodula- tion Distortion, VOUT = 2 V p-p,

RL = 500 Ω

 

6

– mV

5

4

VOLTAGE

AD600

3

 

 

2

 

AD602

OFFSET

1

0

 

OUTPUT

–1

–2

 

 

–3

–4

–0.7 –0.5 –0.3 –0.1 0.1 0.3 0.5 0.7

GAIN CONTROL VOLTAGE – Volts

Figure 42. Output Offset vs. Gain Control Voltage (Control Channel Feedthrough)

10dB

7dB

0°

–45°

–90°

100k

1M

10M

100M

FREQUENCY – Hz

Figure 37. AD602 Frequency and Phase Response vs. Gain

Volts

–1.0

–1.2

–

–1.4

LIMIT

–1.6

VOLTAGE

–1.8

 

–2.0

OUTPUT

–2.2

–2.4

 

 

–2.6

NEGATIVE

–2.8

–3.0

 

 

–3.2

 

–3.4

050 100 200 500 1000 2000 LOAD RESISTANCE – Ω

Figure 40. Typical Output Voltage vs. Load Resistance (Negative Out- put Swing Limits First)

 

 

 

 

 

￿1V

VOUT

￿1∝S

 

 

 

 

 

1￿ 00

90￿

OUTPUT

10￿

0￿ %

INPUT

1V￿ VC

Figure 43. Gain Control Channel Response Time. Top: Output Volt- age, 2 V max, Bottom: Gain Con- trol Voltage VC = ±625 mV

–18–

REV. A

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Analog Devices manual AD600/AD602-Typical Performance Characteristics
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AD600, AD602 specifications

Analog Devices, a leader in high-performance signal processing, offers the AD602 and AD600, two versatile RF amplifiers known for their impressive performance in a variety of applications. The AD602 is a dual-channel, low-noise variable gain amplifier (VGA), while the AD600 is a similar VGA but designed for single-channel applications. Both devices are highly regarded in the fields of communications, instrumentation, and imaging, as they provide outstanding performance in amplifying weak signals.

The AD602 features a gain range of -6 dB to +40 dB, allowing for precise control of the output signal strength. This flexibility makes it well-suited for applications such as IF amplification, where signal levels can vary significantly. The device also includes a low distortion characteristic, enabling it to maintain signal integrity even when handling larger input signals. With a wide bandwidth spanning from DC to 100 MHz, the AD602 caters to applications requiring both low-frequency and high-frequency performance.

On the other hand, the AD600 shares many similarities with the AD602 but offers slightly different characteristics. With a gain range of -1.5 dB to +40 dB, it offers a broader range of control for its output signal strength. Like the AD602, its low distortion and high linearity are crucial for high-fidelity signal processing. The AD600 is also capable of delivering a high output current, making it favorable for driving capacitive loads effectively.

Both devices employ Analog Devices' proprietary topology that minimizes the effects of thermal drift and achieves high levels of performance under varying conditions. They are built with advanced manufacturing processes that ensure stability and reliability in industrial applications. Integrated with differential inputs, these devices help eliminate common-mode noise, thus improving overall signal quality.

The AD602 and AD600 are equipped with comprehensive protection features, enabling them to withstand overload conditions without compromising performance. Their low noise figure contributes to excellent low-level signal recovery, making these amplifiers ideal for radar receivers, medical imaging systems, and satellite communication.

In summary, the AD602 and AD600 by Analog Devices stand out as powerful, reliable variable gain amplifiers with robust performance characteristics. Their flexibility in gain control, low distortion, high linearity, and advanced protection features make them invaluable components in modern electronic systems, enhancing the quality and reliability of signal processing applications across various industries.
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