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AD9300 数据表(PDF) 6 Page - Analog Devices |
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AD9300 数据表(HTML) 6 Page - Analog Devices |
6 / 8 page AD9300 –6– REV. A AD9300 APPLICATIONS To ensure optimum performance from circuits using the AD9300, it is important to follow a few basic rules that apply to all high speed devices. A large, low-impedance ground plane under the AD9300 is critical. Generally, GROUND and GROUND RETURN con- nections should be connected solidly to this plane. GROUND pin connections are signal isolation grounds that are not Figure 2. 4 x 1 AD9300 Multiplexer with Buffered Output Driving 75 Ω Coaxial Cable Figure 4. Output vs. Frequency Figure 3. Harmonic Distortion vs. Frequency Figure 5. Crosstalk vs. Frequency Figure 6. Test Circuit for Harmonic Distortion, Pulse Response, T-Step Response and Disable Characteristics Figure 7. Crosstalk Rejection Test Circuit connected internally; they can be left unconnected, but there may be some degradation in crosstalk rejection. GROUND RE- TURN, on the other hand, serves as the internal ground refer- ence for the AD9300 and, without exception, should be connected to the ground plane. The output stage of the unit is capable of driving a 2 k Ω 10 pF load. Larger capacitive loads may limit full power bandwidth and increase tOFF (the interval between the 50% point of the ENABLE high-to-low transition and the instant the output becomes a high impedance). For applications such as driving cables (see Figure 2), output buffers are recommended. It is recommended that the AD9300 be soldered directly into circuit boards rather than using socket assemblies. If sockets must be used, individual pin sockets are preferred rather than a socket assembly. A second requirement for proper high speed design involves decoupling the power supply and internal bias supply lines from ground to improve noise immu- nity. Chip capacitors are recommended for connecting 0.1 µF and 0.01 µF capacitors between ground and the ±V S supplies (Pins 9 and 14) and the BYPASS connection (Pin 15). |
类似零件编号 - AD9300_15 |
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类似说明 - AD9300_15 |
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