FX019DW View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
MFG CO.
'FX019DW' PDF : 7 Pages View PDF
Application Notes
C6
VSS
SERIAL CLOCK INPUT
LOAD/LATCH
LOAD/LATCH
CHANNEL 1 INPUT
C1
CHANNEL 2 INPUT
C2
CHANNEL 3 INPUT
C3
CHANNEL 4 INPUT
C4
VSS
VDD
1
16
2
15
3
14
4
13
FX019
5
12
6
11
7
10
8
9
VDD
CONTROL DATA INPUT
CHIP SELECT
CHANNEL 1 OUTPUT
CHANNEL 2 OUTPUT
CHANNEL 3 OUTPUT
CHANNEL 4 OUTPUT
VBIAS
C5
VSS
Notes
(1) Channel Amplifiers 1 to 4 are inverting amplifiers.
(2) Analogue input capacitors C1 to C4 are only required for a.c.
input signals, d.c. input signals do not require these components.
Fig.2 External Component Connections
Component
C to C
1
4
C
5
C
6
Tolerances: C = ± 20%
Value
0.1µF
1.0µF
1.0µF
Application Recommendations
To avoid excess noise and instability in the final installation it is recommended that the following points be noted.
(a) A noisy or badly regulated power supply can
cause instability and/or variance of selected gains.
(b) Care should be taken on the design and layout of
the printed circuit board.
(c) All external components (Figure 2) should be
kept close to the FX019 package.
(d) Inputs and outputs should be screened wherever
possible.
(e) Tracks should be kept short.
(f) Analogue tracks should not run parallel to digital
tracks.
(g) A "Ground Plane" connected to V will assist in
SS
eliminating external pick-up on the channel input and
output pins.
(h) Do not run high-level output tracks close to low-
level input tracks.
(i) Input signal amplitudes should be applied with due
regard to Figure 3.
SINAD (dB)
60
50
Input Frequency = 1.0kHz
Input Level 0dB ref = 775mVrms
40
Ch1 2, 3 or 4 Gain Set to 0dB
30
10.0
-40
25.0
-30
75.0 110.0
-20 -17
Fig.3 SINAD vs Input Level – Typical Values
250.0
-10
3
1000.0 1730.0
775.0
mVrms
0
7.0
INPUT LEVEL dB
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