AD1970JSTZRL Analog Devices Inc, AD1970JSTZRL Datasheet
AD1970JSTZRL
Specifications of AD1970JSTZRL
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AD1970JSTZRL Summary of contents
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FEATURES Complete BTSC encoder Pilot tone generator Includes subcarrier modulation Channel separation Bandwidth kHz Stereo analog or digital input Phat-Stereo™ algorithm for stereo image enhancement Dialog enhancement function for playing wide dynamic range video sources ...
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AD1970 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 6 Package Characteristics (48-Lead LQFP).................................. 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. 7 Theory of Operation ........................................................................ 9 Signal Processing ............................................................................ 10 Background of BTSC ................................................................. 10 Performance Factors ...
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SPECIFICATIONS Test conditions, unless otherwise noted Table 1. Parameters Conditions Supply Voltages ( 3 Ambient Temperature 25 Input Signal 1 kHz, 0.8 V Input Sample Rate 48 Measurement Bandwidth kHz Word ...
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AD1970 Table 6. BTSC Encoder Performance Parameter CHANNEL SEPARATION (–25 dB INPUT 500 Hz 500 kHz 5 kHz to 13.5 kHz CHANNEL SEPARATION AT 1 kHz 0 dB Input –2 dB Input FREQUENCY RESPONSE ...
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Table 10. Digital Timing Parameter t MCLK Duty Cycle, External 512 f DMD t MCLK Low Pulse Width, External 512 f DBL t MCLK High Pulse Width, External 512 f DBH t MCLK Low Pulse Width, PLL, 256 f DBL ...
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AD1970 ABSOLUTE MAXIMUM RATINGS Table 11. Min DV to DGND –0.3 DD ODV to DGND –0 AGND –0.3 DD Digital Inputs DGND – 0.3 Analog Inputs AGND – 0.3 AGND to DGND –0.3 Reference Voltage Maximum Junction ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS VOUT_OAMP Table 13. Pin Function Descriptions Pin No. Pin Name Input/Output 1 DVDD 2 RESETB IN 3 DGND 4 DVDD 5 RSVD 6 VOUT_OAMP OUT 7 VIN_OAMP IN 8 AVDD 9 BTSC_OUT OUT 10 AGND ...
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AD1970 Pin No. Pin Name Input/Output 18 VIN_IAMPR IN 19 CAPLP I/O 20 CAPLN I/O 21 CAPRP I/O 22 CAPRN I/O 23 PVDD 24 PLL_LF 25 PGND 26 VID_IN PLL_MODE0 IN 29 PLL_MODE1 IN 30 MCLK ...
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THEORY OF OPERATION The AD1970 is comprised of a BTSC encoder with stereo analog inputs and a sync separator to derive the pilot signal from the composite video stream. Figure 1 shows the block diagram of the device. Signal processing ...
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AD1970 SIGNAL PROCESSING BACKGROUND OF BTSC BTSC is the name of the standard for adding stereo audio capa- bility to the US television system many ways similar to the algorithm used for FM stereo broadcasts, with the ...
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SEPARATION ALIGNMENT The BTSC encoder outputs are all specified in terms of the deviation of the FM 4.5 MHz carrier. For the AD1970, a digital input level (mono signal) should cause a carrier devia- tion of ±25 ...
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AD1970 CONTROL PORT PORT OVERVIEW The AD1970 can be controlled using the I there are three parameters that can be controlled: the encoder output level, the Phat Stereo image enhancement algorithm, and the dialog enhancement algorithm. It ...
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INPUT LEVEL CONTROL This register location controls the input level of both the left and right channels to the AD1970 BTSC encoding algorithm. The register defaults to a value of 1.0 (0100000000000000000000 in binary 2.20 format) and allows a maximum ...
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AD1970 Dialog Enhancement Register This controls the built-in dialog enhancement algorithm, and defaults to 0. The maximum setting is 0100000000000000000000 or a twos complement fractional value of 1.0. This algorithm is intended to solve the problem of playing back high ...
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Table 21. Control Register 1 Write Format Byte 0 Byte1 00000, R Adr [9:8] Adr [7:0] Table 22. Control Register 1 Read Format Byte 0 Byte 1 00000, R Adr [9:8] Adr [7:0] Table 23. Control ...
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AD1970 ANALOG INPUT/OUTPUT ADC INPUT The AD1970 accepts an analog left-right signal on its input. DAC OUTPUT Figure 6 shows the block diagram of the analog output. A series of current sources are controlled by a digital Σ-Δ modulator. Depending ...
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LRCLK LEFT CHANNEL BCLK SDATA MSB LEFT JUSTIFIED MODE BITS PER CHANNEL LEFT CHANNEL LRCLK BCLK SDATA MSB MODE BITS PER CHANNEL LEFT CHANNEL LRCLK BCLK SDATA MSB RIGHT JUSTIFIED MODE: ...
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AD1970 TYPICAL APPLICATIONS CIRCUIT R3 C1 10kΩ 82pF C26 R1 4.7µF 10kΩ AUDIO_IN_LEFT + AUDIO_IN_RIGHT + R2 C25 10kΩ 4.7µF C3 1nF 3.3V R11 PLL_MODE0 10kΩ PLL_MODE1 VID_PRES VIDEO_IN R12 C27 1kΩ 470pF R13 1kΩ Y1 4MHz C8 22pF 3.3V ...
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... OUTLINE DIMENSIONS 1.45 1.40 1.35 0.15 0.05 VIEW A ROTATED 90° CCW ORDERING GUIDE Model Temperature Range 1 AD1970JSTZ 0°C to 70°C 1 AD1970JSTZRL 0°C to 70° Pb-free part. 0.75 1.60 0.60 MAX 0.45 0.20 0.09 7° 3.5° 12 0° SEATING 0.08 MAX ...
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AD1970 NOTES 2 Purchase of licensed I C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I 2 Patent Rights to use these components ...