th7301 ETC-unknow, th7301 Datasheet - Page 8

• Manufacturer Part Number: th7301
• Description: Dual-channel Programmable Low-pass Filter
• Manufacturer: ETC-unknow

TH7301 Dual-Channel Programmable Low-Pass Filter
Application
Diagram
Component List
for Application
Diagram
Important notice
The application diagram below is an example
diagram and provided to assist the customer in
Figure 4: Application Diagram
The AC coupling capacitors (C1-C4) will produce
a high pass pole with the 3k
Their value should be chosen such that this pole
is below any frequencies of interest in the system.
It is recommended to operate the device from a
single power supply for both analog and digital
sections of the device. Operation from separate
power supplies on VEE and VSS and absence of
the digital voltage may cause destruction of the
device.
The serial interface does not contain a power on
reset, thus all three registers must be programmed
after power on to prevent undefined logical states and
to achieve reliable filter operation. I. e. a first reset
word may reset all registers to 0.
Component
C1, C2, C3, C4
C5, C6, C7
R
DAC
C4
C2
I channel
Input
Q channel
Input
-5 Vdc
C1
C3
Function
AC coupling capacitors
AC coupling capacitors
DAC current setting resistor
C5
input resistance.
1
2
3
4
5
6
7
8
VCCI
IIN
IREF
VDD
VSS
QREF
QIN
VCCQ
TH7301
using the IC. The configuration can be changed
for other applications.
The Rdac resistor is the current setting resistor for
the DAC. The recommended values are listed
below.
SDATA
RDAC
QOUT
SDEN
VEEQ
SCLK
IOUT
VEEI
16
15
14
13
12
11
10
9
Value
R
100
4.5
22
I channel
Output
DAC
Q channel
Output
C6
Interface
3-wire
Serial
Unit
k
nF
nF
C7
-5 Vdc
8