th7301 ETC-unknow, th7301 Datasheet
th7301
Available stocks
Related parts for th7301
th7301 Summary of contents
Page 1
... TH7301 Dual-Channel Programmable Low-Pass Filter Description The device incorporates two matching 4th-order Butterworth filters with voltage gain control to perform low-pass filtering on quadrature demo- dulated signals. The cutoff frequency and inband gain are programmable via a standard 3-wire interface. The cutoff frequency can be set between ...
Page 2
... TH7301 Dual-Channel Programmable Low-Pass Filter Theory of The IC is divided into I and Q channel signal paths each consisting of an input stage, gyrator Operation 4th order Butterworth low-pass filter, output stage and feedback amplifier for an oscillator. A serial interface is provided to allow the gain and cutoff frequency to be programmed via a standard 3 wire interface ...
Page 3
... TH7301 Dual-Channel Programmable Low-Pass Filter Pinout The TH7301 is contained in a plastic 16 pin SOP package. Information Figure 2: Pinout Schematic Pin Definition List Pin No. Symbol Function VCCI I channel positive supply IIN I channel signal input IREF ...
Page 4
... TH7301 Dual-Channel Programmable Low-Pass Filter Serial Interface The serial interface is a 3-wire bus used to program the filter cutoff frequency and voltage Programming gain. Pin SDATA is the serial data input for an 8- bit shift register, SCLK is the shift register clock (active positive edge), SDEN (active high) is the serial interface enable ...
Page 5
... TH7301 Dual-Channel Programmable Low-Pass Filter Definition cutoff frequency setting cset Terms f - cutoff frequency (-3dB bandwidth step size step A - voltage gain v Frequency To maintain frequency resolution at low frequen- cies a companding law is applied to the fre- Setting quency code. The frequency range is selected as one of the five octaves in the total filter range controlled by bits FC(2 ...
Page 6
... TH7301 Dual-Channel Programmable Low-Pass Filter Operating Absolute Maximum Ratings Characteristics Parameter Power supply voltage Input voltage - logic inputs Junction temperature Storage temperature Notes: All voltages relative to VCC, VDD Operating Conditions Parameter Power supply voltage Operating temperature range Notes: The device has been designed for a negative supply system. It can be also used for positive supply systems if the input signals are referred to VCC, VDD ...
Page 7
... TH7301 Dual-Channel Programmable Low-Pass Filter Operating Parameter Characteristics Passband (continued) Group Delay Ripple Initial Gain Accuracy Gain Step Accuracy (monotonicity guaranteed) Output Signal-to-Noise Ratio Crosstalk between Channels Gain Match between Channels Bandwidth Match between Channels Passband Group Delay Match between Channels ...
Page 8
... TH7301 Dual-Channel Programmable Low-Pass Filter Application The application diagram below is an example diagram and provided to assist the customer in Diagram I channel Input channel Input Figure 4: Application Diagram Component List The AC coupling capacitors (C1-C4) will produce a high pass pole with the 3k for Application ...
Page 9
... TH7301 Dual-Channel Programmable Low-Pass Filter Filter The following diagrams illustrate some of the main functions and characteristics of the programmable low-pass filter. They represent evaluation results on the existing silicon. Characteristics Figure 5: Measured cutoff frequency accuracy vs. settings (VEE = -5. Figure 6: Measured oscillator frequency deviation vs. settings (VEE = -5. ...
Page 10
... TH7301 Dual-Channel Programmable Low-Pass Filter Filter Characteristics (continued) Figure 7: amplitude response (A Figure 8: passband group delay ripple ( dB MHz, VEE= -5 cset = 10 dB MHz, VEE = -5 cset = 23° 23° ...
Page 11
... TH7301 Dual-Channel Programmable Low-Pass Filter Filter Characteristics (continued) Figure 9: initial gain accuracy (f Figure 10: initial gain accuracy (f = 0.8 MHz 0.2 MHz, VEE = -5 cset meas = 22.4 MHz 5.0 MHz, VEE = -5 cset meas = 23° 23° ...
Page 12
... Dimensions in millimeters, coplanarity < 0.1 mm, original dimension: inch Ordering The TH7301 Programmable Low-Pass Filter IC is available pin SOP WB package and Information for the Operating Temperature range of 0 °C...+70 °C (Commercial). The order number is TH7301C (C=Commercial). Quality Data Quality data is available on request. Contact min 0 ...
Page 13
... TH7301 Dual-Channel Programmable Low-Pass Filter 13 ...
Page 14
Thesys Headquarter & Joint Ventures Thesys Gesellschaft für Mikroelektronik mbH Haarbergstrasse 67 D-99097 Erfurt Germany E-Mail: info@thesys.de Tel.: +49 (361) 427 6000 http:// www.thesys. +49 (361) 427 6111 ax Thesys Sales Offices n Germany Haarbergstrasse 67 D-99097 Erfurt ...