Datasheet AD8368 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | 800 MHz, Linear-in-dB VGA with AGC Detector |
| 页数 / 页 | 20 / 6 — AD8368. Data Sheet. PIN CONFIGURATION AND FUNCTION DESCRIPTIONS. VPS. … |
| 修订版 | C |
| 文件格式/大小 | PDF / 743 Kb |
| 文件语言 | 英语 |
AD8368. Data Sheet. PIN CONFIGURATION AND FUNCTION DESCRIPTIONS. VPS. GAIN 1. 18 ICOM. DETO 2. 17 ICOM. HPFL 3. 16 ICOM. DECL 4. TOP VIEW
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AD8368 Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS L I I E B D M T O P EN VPS VPS MO IC IN 4 3 2 1 0 2 2 2 2 9 2 1 GAIN 1 18 ICOM DETO 2 17 ICOM HPFL 3 AD8368 16 ICOM DECL 4 TOP VIEW 15 DECL (Not to Scale) DETI 5 14 DECL OCOM 6 13 VPSI 7 8 9 0 1 1 1 21 O O OM TP PSI PSI V V OC OU VPS VPS
2
NOTES
00
1. EXPOSED PAD. CONNECT EPAD TO LOW
5907-
IMPEDANCE GROUND.
0 Figure 2. Pin Configuration
Table 4. Pin Function Descriptions Pin No. Mnemonic Description
1 GAIN Gain Control. 2 DETO Detector Output. Provides an output error current for the AGC function. 3 HPFL High-Pass Filter Connection. A capacitor to ground sets the corner frequency of the internal output offset control loop that controls the minimum usable input frequency. 4, 14, 15 DECL Decoupling Pin. Nominally ~VS/2. Decoupling capacitance may need to be adjusted for AGC operation (see the Applications Information section). 5 DETI Detector Input. DC level referenced to DECL pin. 6, 7 OCOM Connect OCOM to low impedance ground. 8 OUTP Signal Output. Must be ac-coupled. 9, 10 VPSO Positive Supply Voltage, 4.5 V to 5.5 V. VPSO and VPSI must be connected together externally and properly bypassed. 11, 12, 13, 22, 23 VPSI Positive Supply Voltage, 4.5 V to 5.5 V. VPSO and VPSI must be connected together externally and properly bypassed. 16, 17, 18, 20 ICOM Connect ICOM to low impedance ground. 19 INPT Signal Input. Must be ac-coupled. 21 MODE Gain Direction Control. High for positive slope. Low for negative slope. 24 ENBL Apply a Positive Voltage (2.5 V VENBL VPSI) to Activate Device. EPAD Exposed Pad. Connect the exposed pad to low impedance ground. Rev. C | Page 6 of 20 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT DESCRIPTION INPUT ATTENUATOR AND INTERPOLATOR FIXED-GAIN STAGE AND OUTPUT BUFFER OUTPUT OFFSET CORRECTION INPUT AND OUTPUT IMPEDANCES GAIN CONTROL INTERFACE APPLICATIONS INFORMATION VGA OPERATION AGC OPERATION STABILITY AND LAYOUT CONSIDERATIONS EVALUATION BOARD OUTLINE DIMENSIONS ORDERING GUIDE
AD8368 Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS L I I E B D M T O P EN VPS VPS MO IC IN 4 3 2 1 0 2 2 2 2 9 2 1 GAIN 1 18 ICOM DETO 2 17 ICOM HPFL 3 AD8368 16 ICOM DECL 4 TOP VIEW 15 DECL (Not to Scale) DETI 5 14 DECL OCOM 6 13 VPSI 7 8 9 0 1 1 1 21 O O OM TP PSI PSI V V OC OU VPS VPS
2
NOTES
00
1. EXPOSED PAD. CONNECT EPAD TO LOW
5907-
IMPEDANCE GROUND.
0 Figure 2. Pin Configuration
Table 4. Pin Function Descriptions Pin No. Mnemonic Description
1 GAIN Gain Control. 2 DETO Detector Output. Provides an output error current for the AGC function. 3 HPFL High-Pass Filter Connection. A capacitor to ground sets the corner frequency of the internal output offset control loop that controls the minimum usable input frequency. 4, 14, 15 DECL Decoupling Pin. Nominally ~VS/2. Decoupling capacitance may need to be adjusted for AGC operation (see the Applications Information section). 5 DETI Detector Input. DC level referenced to DECL pin. 6, 7 OCOM Connect OCOM to low impedance ground. 8 OUTP Signal Output. Must be ac-coupled. 9, 10 VPSO Positive Supply Voltage, 4.5 V to 5.5 V. VPSO and VPSI must be connected together externally and properly bypassed. 11, 12, 13, 22, 23 VPSI Positive Supply Voltage, 4.5 V to 5.5 V. VPSO and VPSI must be connected together externally and properly bypassed. 16, 17, 18, 20 ICOM Connect ICOM to low impedance ground. 19 INPT Signal Input. Must be ac-coupled. 21 MODE Gain Direction Control. High for positive slope. Low for negative slope. 24 ENBL Apply a Positive Voltage (2.5 V VENBL VPSI) to Activate Device. EPAD Exposed Pad. Connect the exposed pad to low impedance ground. Rev. C | Page 6 of 20 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT DESCRIPTION INPUT ATTENUATOR AND INTERPOLATOR FIXED-GAIN STAGE AND OUTPUT BUFFER OUTPUT OFFSET CORRECTION INPUT AND OUTPUT IMPEDANCES GAIN CONTROL INTERFACE APPLICATIONS INFORMATION VGA OPERATION AGC OPERATION STABILITY AND LAYOUT CONSIDERATIONS EVALUATION BOARD OUTLINE DIMENSIONS ORDERING GUIDE