DS90LV027AQ Automotive LVDS Dual Differential Driver General Description Features The DS90LV027AQ is a dual LVDS driver device optimized for high data rate and low power applications. The device is designed to support data rates in excess of 600Mbps (300MHz) utilizing Low Voltage Differential Signaling (LVDS) technology. The DS90LV027AQ is a current mode driver allowing power dissipation to remain low even at high frequency. In addition, the short circuit fault current is also minimized. The device is in a 8-lead small outline package. The DS90LV027AQ has a flow-through design for easy PCB layout. The differential driver outputs provides low EMI with its typical low output swing of 360 mV. It is perfect for high speed transfer of clock and data. The DS90LV027AQ can be paired with its companion dual line receiver, the DS90LV028AQ, or with any of National's LVDS receivers, to provide a highspeed point-to-point LVDS interface. ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ AECQ-100 Grade 3 >600 Mbps (300MHz) switching rates 0.3 ns typical differential skew 0.7 ns maximum differential skew 3.3V power supply design Low power dissipation (46 mW @ 3.3V static) Flow-through design simplifies PCB layout Power Off Protection (outputs in high impedance) Conforms to TIA/EIA-644 Standard 8-Lead SOIC package saves space Connection Diagram Dual-In-Line 30064001 Order Number DS90LV027AQMA See NS Package Number M08A Functional Diagram 30064002 30064003 © 2008 National Semiconductor Corporation 300640 www.national.com DS90LV027AQ Automotive LVDS Dual Differential Driver July 18, 2008 DS90LV027AQ Lead Temperature Range Soldering (4 sec.) Maximum Junction Temperature ESD Ratings Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. +260°C +105°C ≥ 8kV ≥ 250V ≥ 1250V (HBM 1.5 kΩ, 100 pF) Supply Voltage (VCC) −0.3V to +4V Input Voltage (DI) −0.3V to (VCC + 0.3V) Output Voltage (DO±) −0.3V to +3.9V Maximum Package Power Dissipation @ +25°C MA Package 497 mW Derate MA Package 6.2 mW/°C above +25°C 161.0°C/W Thermal Resistance , θJA (0 airflow) 50.0°C/W Thermal Resistance , θJC (0 airflow) Storage Temperature Range −65°C to +150°C (EIAJ 0 Ω, 200 pF) (CDM) Recommended Operating Conditions Supply Voltage (VCC) Temperature (TA) Min 3.0 −40 Typ 3.3 25 Max 3.6 +85 Units V °C Electrical Characteristics Over Supply Voltage and Operating Temperature ranges, unless otherwise specified. (Notes 2, 3, 7) Symbol Parameter Conditions Pin Min Typ Max Units DO+, DO− 250 360 450 mV 1 35 mV 1.4 1.6 V DIFFERENTIAL DRIVER CHARACTERISTICS RL = 100Ω (Figure 1) VOD Output Differential Voltage ΔVOD VOD Magnitude Change VOH Output High Voltage VOL Output Low Voltage VOS Offset Voltage ΔVOS Offset Magnitude Change IOXD Power-off Leakage IOSD Output Short Circuit Current VIH Input High Voltage VIL Input Low Voltage IIH Input High Current VIN = 3.3V or 2.4V IIL Input Low Current VIN = GND or 0.5V VCL Input Clamp Voltage ICL = −18 mA ICC Power Supply Current No Load 0.9 1.1 1.125 1.2 1.375 V 0 3 25 mV ±1 ±10 μA −5.7 −8 mA 2.0 VCC V GND 0.8 V ±2 ±10 μA ±1 ±10 μA 8 14 mA 14 20 mA Min Typ Max Units VOUT = VCC or GND, VCC = 0V DI −1.5 VIN = VCC or GND VCC RL = 100Ω V −0.6 V Switching Characteristics Over Supply Voltage and Operating Temperature Ranges, unless otherwise specified. (Notes 3, 4, 5, 6) Symbol Parameter Conditions DIFFERENTIAL DRIVER CHARACTERISTICS tPHLD Differential Propagation Delay High to Low RL = 100Ω, CL = 15 pF 0.3 0.8 2.0 ns tPLHD Differential Propagation Delay Low to High (Figure 2 and Figure 3) 0.3 1.1 2.0 ns tSKD1 Differential Pulse Skew |tPHLD − tPLHD| (Note 8) 0 0.3 0.7 ns tSKD2 Channel to Channel Skew (Note 9) 0 0.4 0.8 ns tSKD3 Differential Part to Part Skew (Note 10) 0 1.0 ns tSKD4 Differential Part to Part Skew (Note 11) tTLH Transition Low to High Time 0.2 tTHL Transition High to Low Time 0.2 fMAX Maximum Operating Frequency (Note 12) 0 1.7 ns 0.5 1.0 ns 0.5 1.0 350 ns MHz Note 1: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices should be operated at these limits. The table of “Electrical Characteristics” specifies conditions of device operation. www.national.com 2 Note 3: All typicals are given for: VCC = +3.3V and TA = +25°C. Note 4: These parameters are guaranteed by design. The limits are based on statistical analysis of the device over PVT (process, voltage, temperature) ranges. Note 5: CL includes probe and fixture capacitance. Note 6: Generator waveform for all tests unless otherwise specified: f = 1 MHz, ZO = 50Ω, tr ≤ 1 ns, tf ≤ 1 ns (10%-90%). Note 7: The DS90LV027AQ is a current mode device and only function with datasheet specification when a resistive load is applied to the drivers outputs. Note 8: tSKD1, |tPHLD − tPLHD|, is the magnitude difference in differential propagation delay time between the positive going edge and the negative going edge of the same channel. Note 9: tSKD2 is the Differential Channel to Channel Skew of any event on the same device. Note 10: tSKD3, Differential Part to Part Skew, is defined as the difference between the minimum and maximum specified differential propagation delays. This specification applies to devices at the same VCC and within 5°C of each other within the operating temperature range. Note 11: tSKD4, part to part skew, is the differential channel to channel skew of any event between devices. This specification applies to devices over recommended operating temperature and voltage ranges, and across process distribution. tSKD4 is defined as |Max − Min| differential propagation delay. Note 12: fMAX generator input conditions: tr = tf < 1 ns (0% to 100%), 50% duty cycle, 0V to 3V. Output criteria: duty cycle = 45%/55%, VOD > 250mV, all channels switching. Parameter Measurement Information 30064004 FIGURE 1. Differential Driver DC Test Circuit 30064005 FIGURE 2. Differential Driver Propagation Delay and Transition Time Test Circuit 30064006 FIGURE 3. Differential Driver Propagation Delay and Transition Time Waveforms 3 www.national.com DS90LV027AQ Note 2: Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground except VOD. DS90LV027AQ Application Information TABLE 1. Device Pin Descriptions Pin # Name Description 2, 3 DI TTL/CMOS driver input pins 6, 7 DO+ Non-inverting driver output pin 5, 8 DO− Inverting driver output pin 4 GND Ground pin 1 VCC Positive power supply pin, +3.3V ± 0.3V Typical Performance Curves Output High Voltage vs Power Supply Voltage Output Low Voltage vs Power Supply Voltage 30064007 30064008 Output Short Circuit Current vs Power Supply Voltage Differential Output Voltage vs Power Supply Voltage 30064010 30064009 www.national.com 4 DS90LV027AQ Differential Output Voltage vs Load Resistor Offset Voltage vs Power Supply Voltage 30064011 30064012 Power Supply Current vs Frequency Power Supply Current vs Power Supply Voltage 30064014 30064013 Power Supply Current vs Ambient Temperature Differential Propagation Delay vs Power Supply Voltage 30064015 30064016 5 www.national.com DS90LV027AQ Differential Propagation Delay vs Ambient Temperature Differential Skew vs Power Supply Voltage 30064018 30064017 Differential Skew vs Ambient Temperature Transition Time vs Power Supply Voltage 30064019 30064020 Transition Time vs Ambient Temperature 30064021 www.national.com 6 DS90LV027AQ Physical Dimensions inches (millimeters) unless otherwise noted Order Number DS90LV027AQMA NS Package Number M08A 7 www.national.com DS90LV027AQ Automotive LVDS Dual Differential Driver Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Design Support Amplifiers www.national.com/amplifiers WEBENCH www.national.com/webench Audio www.national.com/audio Analog University www.national.com/AU Clock Conditioners www.national.com/timing App Notes www.national.com/appnotes Data Converters www.national.com/adc Distributors www.national.com/contacts Displays www.national.com/displays Green Compliance www.national.com/quality/green Ethernet www.national.com/ethernet Packaging www.national.com/packaging Interface www.national.com/interface Quality and Reliability www.national.com/quality LVDS www.national.com/lvds Reference Designs www.national.com/refdesigns Power Management www.national.com/power Feedback www.national.com/feedback Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www.national.com/led PowerWise www.national.com/powerwise Serial Digital Interface (SDI) www.national.com/sdi Temperature Sensors www.national.com/tempsensors Wireless (PLL/VCO) www.national.com/wireless THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. 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