VCA8500_0803 Datasheet, PDF (6/40 Pages) Texas Instruments – 8-Channel, Ultralow-Power, Variable Gain Amplifier with Low-Noise Pre-Amp

VCA8500
SBOS390A – JANUARY 2008 – REVISED MARCH 2008
DEVICE INFORMATION
RGC PACKAGE
QFN-64
(TOP VIEW)
www.ti.com
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
V_CM 15
AVDD1 16
VCA8500
PowerPAD^TM
(GND)
48 VBL5
47 IN5
46 AVDD1
45 IN6
44 VBL6
43 VBL7
42 IN7
41 VBL8
40 IN8
39 AVDD2
38 VB2
37 VB6
36 VB4
35 V_REFH
34 V_REFL
33 AVDD1
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
TERMINAL
PIN NO.
NAME
1
VBL1
2
IN1
3
AVDD1
4
IN2
5
VBL2
6
VBL3
7
IN3
8
VBL4
9
IN4
10
V_CNTL
11
AVDD2
12
VB3
13
VB1
14
VB5
15
V_CM
16
AVDD1
17
OUT4
18
OUT4
Table 1. TERMINAL FUNCTIONS
I/O
DESCRIPTION
LNA bias voltage (+2.4V); bypass with 0.1µF capacitor (min)
I
LNA input channel 1
+3.3V analog supply
I
LNA input channel 2
LNA bias voltage (+2.4V); bypass with 0.1µF capacitor (min)
LNA bias voltage (+2.4V); bypass with 0.1µF capacitor (min)
I
LNA input channel 3
LNA bias voltage (+2.4V); bypass with 0.1µF capacitor (min)
LNA input channel 4
I
Attenuator control voltage input (all channels)
+5V analog supply (VCA, CW)
Internal bias voltage (+4.2V); bypass with 0.1µF capacitor (min)
Internal bias voltage (+2.4V); bypass with 2.2µF capacitor (1.0µF min)
Internal bias voltage (+2.4V); bypass with 0.1µF capacitor (min)
Internal common-mode voltage (+1.65V); bypass with 0.1µF capacitor (min)
+3.3V analog supply
O
PGA output channel 4 (inverted)
O
PGA output channel 4
6
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