sm5308a Seiko NPC Corp., sm5308a Datasheet
sm5308a
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sm5308a Summary of contents
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... OVERVIEW The SM5308AS is a 3-channel video buffer with built-in 5th-order lowpass filters. The lowpass filter cutoff fre- quency range can adjust from 5.0MHz to 44MHz mat, video signal equipment analog input/outputs. For video input systems, the device functions as a next-stage ADC system anti-aliasing filter. For video output systems, the filter reduces video DAC aliasing and external noise and can drive up to two 75 Ω ...
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... BLOCK DIAGRAM VDD VSS SDA Control SCL IN1 Clamp/Bias/Direct CH-1 IN2 Clamp/Bias/Direct CH-2 Clamp/Bias/Direct IN3 CH-3 Note. The recommended value of the external resistor (R SM5308AS ADS Bypass 5th order LPF Filter (Standard fc) Bypass 5th order LPF (Standard Filter /Half fc) Bypass 5th order LPF (Standard ...
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... GND1 – – 25 OUT1 O 26 VCC1 – 27 REF3 O 28 REF2 O *1. I: input, O: output *2. A: analog, D: digital SM5308AS *2 A/D Description A Internal reference voltage 1 D Digital supply data signal input/output clock signal input D Digital ground – Test pin (connect to ground) ...
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... PIN EQUIVALENT CIRCUITS *1 Number Name I/O 8 IN1 11 IN2 I 13 IN3 25 OUT1 21 OUT2 O 17 OUT3 1 REF1 O 28 REF2 O 27 REF3 O SM5308AS Equivalent circuit VCCn INnA GNDn VCCn OUTnA GNDn VCC1 REF1 GND1 VCC1 REF2 GND1 VCC1 REF3 GND1 SEIKO NPC CORPORATION —4 ...
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... Number Name I/O 3 SDA I/O 4 SCL I 7 ADS I *1. I: input, O: output Note. Resistance values in the equivalent circuits indicate design values. SM5308AS Equivalent circuit VDD 250Ω SDA VSS VDD 180Ω SCL VSS VDD 250Ω ADS VSS SEIKO NPC CORPORATION —5 ...
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... I LH SDA output voltage V OL *1. Total of current consumption of VCC1, VCC2, VCC3, and VDD, when no input signals. SM5308AS Condition VCC1, VCC2, VCC3, VDD ADS, SDA, SCL, INn ( θ ° C/W Note. θ the measured quantity under the mounted condition which NPC specifi ...
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... SDA, SCL rise time t r SDA, SCL fall time t f SCL setup time (stop condition) t SU;STO SDA, SCL input capacitance C i SDA LOW SCL t t HD;STA HD;DAT S SM5308AS Condition min 0 0.6 1.3 0.6 0.6 0 100 − − 0.6 − SU;DAT f HD;STA t t HIGH SU;STA Sr Note ...
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... Half fc mode cutoff frequency half1 ratio R half2 4fc attenuation G SB Filter bypass mode passband F BP SM5308AS = 1.0Vp- Condition min Clamp input 1.65 Bias input 2.15 − Bias input Mode: b0 (bias, 0dB), THD < 1.0% 1.4 Mode: b6 (bias, 6dB), THD < 1.0% 1.4 Mode: c0 (clamp, 0dB), THD < 1.0% 1.4 Mode: c6 (clamp, 6dB), THD < ...
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... REF output voltage Test level The definition of “Test Level” shown in the electrical characteristic table is as follows 100% of products tested 25° Guaranteed as result of design and characteristics evaluation. SM5308AS = 1.0Vp- Condition min − 0.5 Gain = 0dB Gain = 6dB 5.5 − 0.5 ...
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... Bias b6 c0 Clamp c6 d0 Bias d6 e0 Clamp e6 f0 Bias f6 g0 Clamp Direct SM5308AS Output gain fc mode CH-3 0dB Bias 6dB 0dB Standard 6dB 0dB 6dB 0dB 6dB Half 0dB 6dB 0dB 6dB 0dB 6dB 0dB Standard 6dB 0dB Half ...
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... I C Controller 4.7µF + IN1 4.7µF IN2 + 4.7µF + IN3 R ISET Note. This is the electrical characteristics evaluation circuit only, then it is not a recommended application circuit. TEST pin should be connected to GND. SM5308AS 0.1µF 10µF 10µF 10µF REF1 REF2 VDD REF3 SDA VCC1 SCL OUT1 VSS ...
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... Input type switching (sync-tip clamp, bias, direct) 6) Disable function 7) Maximum number of slave addresses 2 The transfer rate of I C-BUS corresponds to the fast-mode (up to 400kbit/s). Note that the SM5308AS does not support a read function (IC is write only). Basic cycle SDA SCL Start condition The basic access cycle comprises the following elements ...
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... The 3rd byte control data sets the register flags corresponding to the subaddress selected by 2nd byte. The flags assigned are shown in the following table. Register name D7 D6 FCSET FCM FC6 CONDITION1 CB5 CB4 CONDITION2 PD – SM5308AS 1st byte: slave address ...
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... Register name: CONDITION1 Flag names: CB [5:4], CB [3:2], CB [1:0] These flags set the input type of CH-1, CH-2, and CH-3 to one of three types: sync-tip clamp input, bias input, or direct input. Channel CH-1 CH-2 CH-3 *1. An input coupling capacitor should not be connected when direct input is selected. SM5308AS Flag name FC6 FC5 FC4 FC3 FC2 0 0 ...
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... Register name: CONDITION2 Flag name: BYPASS This flag allows the internal lowpass filter in SM5308AS to be bypassed. The output gain can be switched, even in filter bypass mode. The input type and output gain can all be set just as in filter mode. However, the cutoff frequency and fc mode settings have no effect on the outputs. ...
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... ADS is Open, that device is subsequently no longer accessible until power supply turns OFF. Flag name Maximum number of slave address NCA 2 L (2-address mode (3-address mode) ADS SM5308AS Default ADS pin setting LOW HIGH Open LOW HIGH Open NCA=2 SW21 Control ...
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... Lowpass Filter The SM5308AS has built-in 5th-order lowpass filters with variable cutoff frequency. The cutoff frequency range is set by the resistor (R ) connected between ISET and GND, and the cutoff frequency setting is determined by ISET FCDATA data. The cutoff frequency vs. FCDATA values are listed in table 2, and shown graphically in figure 1. ...
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... In disable mode and filter bypass mode, the ISET pin is high impedance, and no current flows into R . ISET Note. A value other than 1.8kΩ will change the current consumption of SM5308AS. In the determination of resistance value, caution should be taken to ensure the power dissipation does not exceed the absolute maximum rating for the package. Half fc Mode In half fc mode, the CH-2 and CH-3 cutoff frequency is 1/2 that of the CH-1 cutoff frequency setting ...
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... Filter Bypass Mode In filter bypass mode, the internal lowpass filter in SM5308AS is bypassed and the signal is input to the output buffer stage directly. In filter bypass mode, the input type and output gain are set just as for filter mode. But the cutoff frequency setting and fc mode setting have no effect on the outputs. In this mode, the passband fre- quency is 80MHz (typ), which can support SXGA-class signals ...
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... Power Supply Invest Timing The SM5308AS uses 2-type power supply, analog one (VCC1, VCC2, VCC3) and digital one (VDD). There- fore all power supply pins should be forced voltage at the same time power supply invested. In the case analog power supply and digital one are set up simultaneously, composing system the time-lag to makes short time as standard under 1ms is need ...
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... Figure 8. Gain and Phase characteristics (6dB, standard fc mode, FCDATA = 10) 12 Gain Phase -12 -18 -24 -30 -36 -42 -48 -54 0 Frequency [MHz] Figure 10. Gain and Phase characteristics (6dB, half fc mode, FCDATA = 10) SM5308AS = 1.0Vp- 1.8kΩ ISET L 12 Gain -12 -90 -18 -180 -24 -270 -30 -360 -36 -450 ...
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... Figure 12. Gain and Phase characteristics (6dB, standard fc mode, FCDATA = 227) 12 Gain Phase -12 -18 -24 -30 -36 -42 -48 -54 0 100 Frequency [MHz] Figure 14. Gain and Phase characteristics (6dB, half fc mode, FCDATA = 227) SM5308AS 12 Gain -12 -90 -18 -180 -24 -270 -30 -360 -36 -450 -42 Group delay -540 -48 -630 -54 0 Figure 13 ...
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... Frequency [MHz] Figure 18. Group delay vs. FCDATA, fc mode (6dB) FCDATA (1) 227 (2) 227 (3) 10 (4) 10 SM5308AS (Bypass mode) -90 -180 -270 -360 -450 -540 -630 100 Figure 17. Phase vs. FCDATA, fc mode (6dB) fc mode standard half standard half (Bypass mode mode ...
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... FCDATA Figure 21. I vs. FCDATA (6dB) CC1 7.0 6.5 6.0 5.5 5.0 - [°C] Figure 23. Gain vs. Ta (6dB) 1.0 0.5 0.0 -0.5 -1.0 - [°C] Figure 25. Gain vs. Ta (0dB) SM5308AS 150 140 130 120 110 100 -20 5.50 Figure 20. I 7.0 6.5 6.0 5.5 5.0 256 4.5 Figure 22. Gain vs. V 1.0 0.5 0.0 -0.5 -1 4.5 Figure 24. Gain vs. V ...
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... V [V] IN Figure 26 OUT (0dB, filter mode, direct mode) 3.5 3 2.5 2 1 [V] IN Figure 28 OUT (0dB, filter bypass mode, direct mode) SM5308AS 4.5 4 3.5 3 2.5 2 1 Figure 27. V (6dB, filter mode, direct mode) 4.5 4 3.5 3 2.5 2 1 Figure 29. V (6dB, fi ...
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... Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested appropriately take steps to obtain required permissions or approvals from appropriate government agencies. SM5308AS SEIKO NPC CORPORATION 15-6, Nihombashi-kabutocho, Chuo-ku, ...