TYPICAL CHARACTERISTICS
At T
A
= +25°C, V
DDA
= V
DDB
= V
DDR
= +5V, load resistance = 500Ω on each output to ground, MGS = 011, LNP = 22dB and f
IN
= 5MHz, unless otherwise noted.
The input to the preamp (LNP) is single-ended, and the output from the VCA is single-ended, unless otherwise noted. This results in a 6dB reduction in signal
amplitude compared to differential operation.
65
60
55
50
Gain (dB)
GAIN vs VCA
CNTL
MGS = 101 MGS = 100
GAIN ERROR vs TEMPERATURE
2.0
1.5
MGS = 110
MGS = 111
Gain Error (dB)
1.0
+85°C
0.5
0.0
–0.5
–1.0
+25°C
45
40
35
30
25
20
15
MGS = 010 MGS = 011
MGS = 000 MGS = 001
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
VCA
CNTL
(V)
–1.5
–2.0
–40°C
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
VCA
CNTL
(V)
GAIN ERROR vs VCA
CNTL
2.0
1.5
1.0
1MHz
5MHz
10MHz
2.0
1.5
1.0
GAIN ERROR vs VCA
CNTL
Gain Error (dB)
0.5
0.0
–0.5
–1.0
–1.5
–2.0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
VCA
CNTL
(V)
Gain Error (dB)
MGS = 000
0.5
0
–0.5
–1.0
MGS = 111
–1.5
–2.0
MGS = 011
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
VCA
CNTL
(V)
50
45
40
35
30
Units
GAIN MATCH
0.2V CHA to CHB
60
50
40
GAIN MATCH
3.0V CHA to CHB
Units
0.23
–0.29
–0.42
0.29
0.36
25
20
15
10
5
0
0.10
–0.22
–0.03
0.16
–0.16
–0.09
–0.48
0.04
–0.55
–0.35
30
20
10
0
–0.14
0.12
–0.20
–0.10
0.01
0.05
0.07
0.04
–0.23
Delta Gain (dB)
–0.26
–0.17
Delta Gain (dB)
4
VCA2616, VCA2611
www.ti.com
SBOS234E
0.02
0.09
0.15
0.18
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
