VCA2615 Datasheet, PDF (5/29 Pages) Texas Instruments – Dual, Low-Noise Variable-Gain Amplifier with Preamp

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PIN CONFIGURATION
VCA2615
SBOS316C − JULY 2005 − REVISED SEPTEMBER 2005
V_DDA 1
C_EXTA1 2
C_EXTA2 3
VCA_IN− A 4
VCA_IN+A 5
LNP_OUT− A 6
LNP_OUT+A 7
NC 8
VB 9
VDDAL 10
GNDAL 11
LNP_IN− A 12
VCA2615
(Thermal Pad tied to
Ground Potential)
36 V_DDB
35 C_EXTB1
34 C_EXTB2
33 VCA_IN−B
32 VCA_IN+B
31 LNP_OUT−B
30 LNP_OUT+B
29 NC
28 NC
27 VDDBL
26 GNDBL
25 LNP_IN−B
PIN CONFIGURATION
PIN
DESIGNATOR
1
VDDA
2
CEXTA1
3
CEXTA2
4
VCAIN−A
5
VCAIN+A
6
LNPOUT−A
7
LNPOUT+A
8
NC
9
VB
10
VDDAL
11
GNDAL
12
LNPIN−A
13
G1
14
G2
15
VDDA
16
LNPIN+A
17
VDDR
18
VCLMP
19
VCM
20
GNDR
21
LNPIN+B
22
PDL
23
PDV
24
H/L
DESCRIPTION
Channel A + Supply
External Capacitor
External Capacitor
Channel A VCA Negative Input
Channel A VCA Positive Input
Channel A LNP Negative Output
Channel A LNP Positive Output
Do Not Connect
0.01µF Bypass
VDD A Channel LNP
GND A Channel LNP
Channel A LNP Inverting Input
LNP Gain Setting Pin (MSB)
LNP Gain Setting Pin (LSB)
Supply Pin for Gain Setting
Channel A LNP Noninverting Input
Supply for Internal Reference
VCA Clamp Voltage Setting Pin
0.1µF Bypass
Ground for Internal Reference
Channel B LNP Noninverting Input
Power Down LNPs
Power Down VCAs
VCA High/Low Gain Mode
PIN
DESIGNATOR
DESCRIPTION
25
LNPIN−B
Channel B LNP Inverting Input
26
GNDBL
GND B Channel LNP
27
VDDBL
VDD B Channel LNP
28
NC
Do Not Connect
29
NC
Do Not Connect
30
LNPOUT+B
31
LNPOUT−B
32
VCAIN+B
33
VCAIN−B
34
CEXTB2
35
CEXTB1
36
VDDB
37
GNDB
Channel B LNP Positive Output
Channel B LNP Negative Output
Channel B VCA Positive Input
Channel B VCA Negative Input
External Capacitor
External Capacitor
Channel B + Supply
Channel B Ground
38
VCAOUT−B
39
VCAOUT+B
40
FB1
Channel B VCA Negative Output
Channel B VCA Positive Output
Feedback Control Pin
41
FB2
Feedback Control Pin
42
FB3
Feedback Control Pin
43
VCNTL
44
VCAINSEL
45
FB4
VCA Control Voltage Input
VCA Input Select, Hi = External
Feedback Control Pin
46
VCAOUT+A
47
VCAOUT−A
48
GNDA
Channel A VCA Positive Pin
Channel A VCA Negative Pin
Channel A Ground
5