VCA8500 Datasheet, PDF (6/15 Pages) Texas Instruments – 8-Channel, Ultra-Low Power Variable Gain Amplifier with Low-Noise Pre-Amp

VCA8500
SBOS390 – JANUARY 2008
DEVICE INFORMATION
RGC PACKAGE
QFN-64
(TOP VIEW)
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
VBL1 1
IN1 2
AVDD1 3
IN2 4
VBL2 5
VBL3 6
IN3 7
VBL4 8
IN4 9
V_CNTL 10
AVDD2 11
VB3 12
VB1 13
VB5 14
VCM 15
AVDD1 16
VCA8500
PowerPAD^TM
48 VBL5
47 IN5
46 AVDD1
45 VBL6
44 IN6
43 VBL7
42 IN7
41 VBL8
40 IN8
39 AVDD2
38 VB2
37 VB6
36 VB4
35 VREFH
34 VREFL
33 AVDD1
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
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TERMINAL
PIN NO.
NAME
1
VBL1
2
IN1
3
AVDD1
4
IN2
5
VBL2
6
VBL3
7
IN3
8
VBL4
9
IN4
10
VCNTL
11
AVDD2
12
VB3
13
VB1
14
VB5
15
VCM
16
AVDD1
17
OUT4
18
OUT4
19
OUT3
20
OUT3
Table 1. TERMINAL FUNCTIONS
I/O
DESCRIPTION
Internal bias voltage; bypass with 0.1µF (min)
I
LNA input channel 1
+3.3V analog supply
I
LNA input channel 2
Internal bias voltage; bypass with 0.1µF (min)
Internal bias voltage; bypass with 0.1µF (min)
I
LNA input channel 3
Internal bias voltage; bypass with 0.1µF (min)
LNA input channel 4
I
Attenuator control voltage input (all channels)
+5V Analog supply (VCA, CW)
Internal bias voltage; bypass with 0.1µF (min)
Internal bias voltage; bypass with 2.2µF (1.0µF min)
Internal bias voltage; bypass with 0.1µF (min)
Internal common-mode voltage; bypass with 0.1µF (min)
+3.3V analog supply
O
PGA output channel 4 (inverted)
O
PGA output channel 4
O
PGA output channel 3 (inverted)
O
PGA output channel 3
6
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