Datasheet

2 Circuit
V
SP
V
SN
V
SP
C
5
C
6
R
9
R
2
R
3
R
4
Hold/Track
V
SN
+
+
C
3
C
2
L
1
TB1
L
2
C
4
1
2
3
4
5
10
9
8
7
6
+V
CC
I ,Collector,C
OUT
S/HIn-
S/HIn+
Ground
Emitter,E
Base,B
C
HOLD
-V
CC
HoldControl
Component_1
U1
C
1
R
6
R
7
V
IN
I
OUT
R
10
R
8
R
5
R
1
V
OUT
3 Components
Circuit www.ti.com
The circuit schematic in Figure 2 shows the connections for all possible components. Each configuration
uses only some of the components.
Figure 2. Schematic for DEM-OPA-MSOP-1A
Components that have RF performance similar to the ones in Table 1 may be substituted.
Table 1. Component Descriptions
PART DESCRIPTION
C
5
, C
6
Tantalum Chip Capacitor, SMD EIA Size 3216, 20V
C
1
, C
3
, C
4
Multilayer Ceramic Chip Capacitor, SMD 0603, 50V
C
C
Multilayer Ceramic Chip Capacitor, SMD 0805, 50V
V
OUT
, V
IN
, Hld/Trade, I
OUT
SMA or SMB Board Jack (Amphenol 901-144-8)
L
1
, L
2
EMI-Suppression Ferrite Chip, SMD 1206 (Steward LI 1206 B 900 R)
TB
1
Terminal Block, 3.5mm Centers (On-Shore Technology ED555/3DS)
R
XX
Metal Film Chip Resistor, SMD 0603, 1/8W
Please refer to Figure 3 for the location of the following components:
• R
1
, R
3
, R
5
and R
6
set the desired input/output impedances of the Operational Transconductance
Amplifer (OTA) section when evaluated by itself.
• R
2
is used to set the gain of the OTA section.
• R
1
, R
7
, and R
8
set the desired input/output impedances of the sampling OTA section when evaluated
by itself
• C
1
is the hold capacitor.
• R
4
and R
9
sets the input impedance for the TTL control.
• C
2
, C
3
, C
4
, C
5
, and C
6
are supply bypass capacitors. C
2
is optional; it adds a bypass between the
supplies, which may improve distortion performance.
2 DEM-OPA-MSOP-1A Demonstration Fixture SBOU042A – November 2006 – Revised December 2008
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