AD8368_15 Datasheet, PDF (6/20 Pages) Analog Devices – 800 MHz, Linear-in-dB VGA with AGC Detector

AD8368
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
24 23 22 21 20 19
GAIN 1
DETO 2
HPFL 3
DECL 4
DETI 5
OCOM 6
AD8368
TOP VIEW
(Not to Scale)
7 8 9 10 11 12
18 ICOM
17 ICOM
16 ICOM
15 DECL
14 DECL
13 VPSI
NOTES
1. EXPOSED PAD. CONNECT EPAD TO LOW
IMPEDANCE GROUND.
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. B | Page 6 of 20