lmh6584 National Semiconductor Corporation, lmh6584 Datasheet
lmh6584
Related parts for lmh6584
lmh6584 Summary of contents
Page 1
... The outputs and inputs also feature high impedance inactive states allowing high performance input and output expansion for array sizes such combining two devices. The LMH6584/LMH6585 are controlled with a 4 pin serial interface. Both single serial mode and addressed chain modes are available. ...
Page 2
... OUT 150Ω, 3.58 MHz/ 4.43 MHz 150Ω, 3.58 MHz/ 4.43 MHz R L LMH6584, 2V Step, 10% to 90% LMH6585 Step, 10% to 90% LMH6584 Step, 10% to 90% LMH6585, V Step, 10% to 90% LMH6584 Step LMH6585 Step LMH6584 20% to 80% PP LMH6585 20% to 80% PP (Note 6) 2V Step, V within 0 ...
Page 3
... Output Voltage Low OL T Setup Time S T Hold Time H Conditions LMH6584 LMH6585 (Note 10) Non-Inverting (Note 9) Non-Inverting (Note 10) = 100Ω, LMH6584 R L ∞ LMH6584(Note 11 100Ω, LMH6585 R L ∞ LMH6585 L ∞ ∞ RST Pin > 2.0V Non-Inverting Input connected to one output ...
Page 4
... OUT 150Ω, 3.58 MHz/ 4.43 MHz 150Ω, 3.58 MHz/ 4.43 MHz R L LMH6584, 2V Step, 10% to 90% LMH6585, 2V Step, 10% to 90% LMH6584, 2V Step, 10% to 90% LMH6585, 2V Step, 10% to 90% 2V Step LMH6584 40% to 60% PP (Note 6) LMH6585 40% to 60% PP (Note 6) 2V Step, V Within 0.5% ...
Page 5
... Note 11: This parameter is guaranteed by design and/or characterization and is not tested in production. Note 12: The channel bandwidth varies over the different channel combinations and with expansion. See the application section for more details. Conditions = 100Ω, LMH5484 R L ∞ LMH6584 L = 100Ω, LMH6585 R L ∞ LMH6585 ...
Page 6
... Block and Connection Diagram Ordering Information Package Part Number LMH6584VV 144-Pin LQFP LMH6585VV www.national.com 144-Pin LQFP Top View Package Marking Transport Media LMH6584VV 60 Units/Tray LMH6585VV 6 30045002 NSC Drawing VNG144C ...
Page 7
... Typical Performance Characteristics LMH6584 Unless otherwise specified, typical conditions are: T perature extremes Frequency Response PP Small Signal Bandwidth Group Delay = 150Ω. Boldface limits apply at the tem- = 25° + ±5V Frequency Response PP 30045048 Small Signal Bandwidth 30045024 Group Delay Broadcast ...
Page 8
Second Order Distortion (HD2) vs. Frequency Second Order Distortion vs. Frequency Output Swing www.national.com Third Order Distortion (HD3) vs. Frequency 30045026 Third Order Distortion vs. Frequency 30045027 Output Swing 30045030 8 30045028 30045029 30045031 ...
Page 9
Output Swing over Temperature 30045032 Pulse Response 30045013 Input Impedance (Terminated Input) 30045074 Output Swing over Temperature Pulse Response Enabled Output Impedance 9 30045033 30045014 30045075 www.national.com ...
Page 10
Disabled Output Impedance Typical Performance Characteristics LMH6585 Unless otherwise specified, typical conditions are: T perature extremes Frequency Response PP www.national.com Input Referred Voltage Noise 30045076 = 150Ω; Boldface limits apply at the tem- = 25° +2, ...
Page 11
Small Signal Frequency Response Group Delay Second Order Distortion (HD2) vs. Frequency Small Signal Frequency Response 30045057 30045059 Third Order Distortion (HD3) vs. Frequency 30045065 11 30045058 Group Delay 30045060 30045066 www.national.com ...
Page 12
Second Order Distortion (HD2) vs. Frequency Output Swing Pulse Response www.national.com Third Order Distortion (HD3) vs. Frequency 30045067 Output Swing 30045069 Pulse Response 30045061 12 30045068 30045070 30045062 ...
Page 13
Large Signal Pulse Response 30045063 Input Impedance (Terminated Input) 30045077 Input Referred Voltage Noise 30045080 Large Signal Pulse Response Output Impedance 13 30045064 30045078 www.national.com ...
Page 14
... When disabled, the outputs are in a high impedance state. The LMH6584/ LMH6585 can have any input connected to any (or all) output (s). Conversely, a given output can have only one associated input ...
Page 15
FIGURE 2. Frequency Response for Buffered and Unbuffered Output expansion FIGURE 3. Output Expansion no Buffers (Only 4 input and 4 output channels shown for illustration purposes.) Input expansion requires more planning is also quite easy, but there are two ...
Page 16
... CHANNEL VARIATIONS The LMH6584/LMH6584 crosspoint switches have a very large number of possible channel combinations. There is some systematic variation in channel performance. Parame- ters such as bandwidth and distortion have a range of values depending on which channel combination is selected. The FIGURE 6. Bandwidth Variation over Channel Combinations Because the inputs are the dominate factor in channel band- width it is possible to adjust the bandwith of the slower inputs ...
Page 17
... When driving transmission lines the 50Ω or 75Ω matching re- sistor normally provides enough isolation. USING OUTPUT BUFFERING TO ENHANCE RELIABILITY The LMH6584/LMH6585 crosspoint switch can offer en- hanced reliability with the use of external buffers on the outputs. For this technique to provide maximum benefit a very high speed amplifier such as the LMH6703 should be used, as shown in Figure 12 ...
Page 18
... As described further below, there are two modes for pro- graming the LMH6584/LMH6585, Serial Mode and Ad- dressed Mode. The LMH6584/LMH6585 are programmed via a serial input bus with the support of four other digital control pins. The se- rial bus consists of a clock pin (CLK), a serial data in pin ...
Page 19
Serial Mode Data Frame (First Two Words) Output 0 Input Address LSB Off = TRI-STATE ® , Bit 0 is first bit clocked into device. Serial Mode Data Frame (Continued) Output 2 Input Address LSB 12 ...
Page 20
ADDRESSED PROGRAMMING MODE Addressed programming mode makes it possible to change only one output register at a time. To utilize this mode the mode pin must be High. All other pins function the same as in serial programming mode except ...
Page 21
... Generous pas- sive venting and vertical board orientation may avoid the need for fan cooling provided a large heat sink is used. Also, the LMH6584/LMH6585 can be operated with a ±3.3V power supply. This will cut power dissipation substantially while only reducing bandwidth by about 10 LMH6584/LMH6585 are fully characterized and factory tested at the ± ...
Page 22
... National Semi- conductor suggests the following evaluation boards as a guide for high frequency layout and as an aid in device testing and characterization National Semiconductor offers an eval- uation board which can be found on the LMH6584 and LMH6585 Product Folder. 30045053 22 ...
Page 23
Physical Dimensions inches (millimeters) unless otherwise noted 144-Pin LQFP NS Package Number VNG144C 23 www.national.com ...
Page 24
... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...