VCA2619 Datasheet, PDF (13/19 Pages) Burr-Brown (TI) – Dual, Variable Gain Amplifier with Input Buffer

VCA2619
www.ti.com
LAYOUT CONSIDERATIONS
The VCA2619 is an analog amplifier capable of high gain.
When working on a PCB layout for the VCA2619, it is rec-
ommended to utilize a solid ground plane that is connected
to analog ground. This helps to maximize the noise perfor-
mance of the VCA2619.
SBOS276A − AUGUST 2003 − REVISED AUGUST 2003
Adequate power−supply decoupling must be used in order
to achieve the best possible performance. Decoupling ca-
pacitors on the VCA_CNTL voltage should also be used to
help minimize noise. Recommended values can be ob-
tained from the layout diagram of Figure 6.
+5V
0.1µF
1µF
+5V
0.1µF
0.1µF
1µF
1µF
28 3 5
IN_A
0.01µF _{1 INA VDDA VDDR VCM}
0.01µF
−OUT_A ²⁵
−OUT_A
0.01µF
+OUT_A ²⁶
+OUT_A
VCA2619
0.01µF
−OUT_B ¹⁶
0.01µF
IN_B
8 _INB
0.01µF
15
+OUT_B
V_DDB V_BIAS V_CNTL
13
1µF
4 24
−OUT_B
+OUT_B
0.1µF
+5V
1µF
0.1µF
0.1µF
VCA_CNTL
Figure 6. VCA2619 Layout.
13