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ADL5567ACPZN-R7 Datenblatt(PDF) 16 Page - Analog Devices |
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ADL5567ACPZN-R7 Datenblatt(HTML) 16 Page - Analog Devices |
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16 / 24 page ![]() Data Sheet ADL5567 Rev. 0 | Page 15 of 23 APPLICATIONS INFORMATION BASIC CONNECTIONS Figure 39 shows the basic connections for operating the ADL5567. Apply a voltage between 3 V and 5 V to the VCC1 and VCC2 pins through a 5.1 nH inductor and decouple the supply side of the inductor with at least one low inductance, 0.1 μF surface-mount ceramic capacitor. This inductor, together with the internal capacitance at the VCCx pins, results in a two-pole, low-pass network and reduces the noise from the power supply. Decouple the VCOM1 and VCOM2 pins (Pin 21 and Pin 10) using a 0.1 μF capacitor. The ENBL1 and ENBL2 pins (Pin 22 and Pin 9) are tied to logic high, respectively, to enable each amplifier. A differential signal is applied to Amplifier 1 through Pin 1 (VIN1) and Pin 2 (VIP1) and to Amplifier 2 through Pin 5 (VIP2) and Pin 6 (VIN2). Each amplifier has a gain of 20 dB. The Amplifier 1 input pins, Pin 1 (VIN1) and Pin 2 (VIP1), and output pins, Pin 18 (VON1) and Pin 17 (VOP1), are biased by applying a voltage to Pin 21 (VCOM1). If VCOM1 is left open, VCOM1 equals ½ of VS. The Amplifier 2 input pins, Pin 5 (VIP2) and Pin 6 (VIN2), and the output pins, Pin 13 (VON2) and Pin 14 (VOP2), are biased by applying a voltage to VCOM2. If VCOM2 is left open, VCOM2 equals ½ of VS. The ADL5567 can be ac-coupled as shown in Figure 39, or can be dc-coupled if within the specified input and output common- mode voltage ranges. Pulling the ENBL1/ENBL2 pins low puts the ADL5567 in sleep mode, reducing the current consumption to 7 mA at ambient temperature. 0.01µF BALANCED LOAD VIP1 VIN1 0.01µF VON1 VCOM1 VOP1 0.01µF VCC2 RF RF RG RG 2 21 18 18 18 17 1 2 1 ENBL1 ENBL2 3.3V 0.01µF 0.01µF 3.3V RG 2 21 18 11 17 1 22 9 VCC1 ADL5567 20 0.01µF BALANCED LOAD VIP2 VIN2 PM2 PM1 3.3V 3.3V 0.01µF VON2 VCOM2 VOP2 0.01µF RF RF RG RG 5 8 3 4 7 12 15 16 19 24 10 13 14 23 6 0.01µF 10µF VS 0.01µF 5.1nH 5.1nH EXPOSED PAD + ½ RS ½ RS ½ RS ½ RS BALANCED AC BALANCED AC Figure 39. Basic Connections |
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