DS30BA101 3.125 Gbps Differential Buffer General Description Features The DS30BA101 is a high-speed differential buffer for cable driving, signal buffering, and signal repeating applications. Its fully differential signal path ensures exceptional signal integrity and noise immunity. The DS30BA101 drives both differential and single-ended transmission lines at data rates up to 3.125 Gbps. The output voltage amplitude is adjustable via a single external resistor for cable driving applications into 75Ω singleended and 100Ω differential mode impedances. The DS30BA101 is powered from a single 3.3V supply and consumes 165 mW (typical). It operates over the full industrial temperature range of -40°C to +85°C and is available in a 4 x 4 mm 16-pin LLP package. ■ ■ ■ ■ Data rates from DC to 3.125 Gbps Supports SD and HD video resolutions Power consumption: 165 mW typical Industrial temperature range: -40°C to +85°C Applications ■ Cable extension ■ Signal buffering and repeating ■ Security and surveillance Typical Application 30152002 © 2012 Texas Instruments Incorporated 301520 SNLS403 www.ti.com DS30BA101 3.125 Gbps Differential Buffer February 9, 2012 DS30BA101 Connection Diagram 30152005 The exposed die attach pad is a negative electrical terminal for this device. It should be connected to the negative power supply voltage. 16-Pin LLP Order Number DS30BA101SQ Package Number SQB16A Ordering Information Part Number Package Quantity DS30BA101SQ 16-Pin LLP, 4.0 x 4.0 x 0.8 mm, 0.65 mm pitch Reel of 1000 DS30BA101SQE 16-Pin LLP, 4.0 x 4.0 x 0.8 mm, 0.65 mm pitch Reel of 250 DS30BA101SQX 16-Pin LLP, 4.0 x 4.0 x 0.8 mm, 0.65 mm pitch Reel of 4500 www.ti.com 2 DS30BA101 Pin Descriptions Pin Name I/O, Type Description 1 IN+ I, CML Non-inverting input. 2 IN- I, CML Inverting input. 3 VEE Ground Negative power supply (ground). 4 RVO I, Analog Output voltage level control. Connect a resistor between this pin and VCC to set the output voltage. 5 NC N/A No connect. Not bonded internally. 6 VCC Power Positive power supply (+3.3V). 7 NC N/A No connect. Not bonded internally. 8 NC N/A No connect. Not bonded internally. 9 VCC Power Positive power supply (+3.3V). 10 VEE Ground Negative power supply (ground). 11 OUT- O, Data Inverting output. 12 OUT+ O, Data Non-inverting output. 13 NC N/A No connect. Not bonded internally. 14 NC N/A No connect. Not bonded internally. 15 NC N/A No connect. Not bonded internally. 16 NC N/A No connect. Not bonded internally. DAP VEE Ground Connect exposed DAP to negative power supply (ground). 3 www.ti.com DS30BA101 ≥±4.5 kV ≥±250V ≥±2 kV ESD Rating (HBM) Absolute Maximum Ratings (Note 1) ESD Rating (MM) Supply Voltage: Input Voltage (all inputs) Output Current Storage Temperature Range Junction Temperature Package Thermal Resistance θJA 16-pin LLP θJC 16-pin LLP 3.6V −0.3V to VCC+0.3V 28 mA −65°C to +150°C +125°C ESD Rating (CDM) Recommended Operating Conditions Supply Voltage (VCC): Operating Free Air Temperature (TA) +58°C/W +21°C/W 3.3V ±5% -40°C to +85°C DC Electrical Characteristics Over recommended supply voltage and operating temperature ranges, unless otherwise specified. (Note 2, Note 3) Symbol Parameter VICM Input Common Mode Voltage VID Input Voltage Swing VOCM Output Common Mode Voltage VOUT Output Voltage ICC Conditions Reference IN+, IN- Differential Min Typ 1.1 + VID/2 100 OUT+, OUT- Max Units VCC – VID/2 V 2200 mVP−P VCC – VOUT V Single-ended, 75Ω load, RVO = 750Ω 800 mVP-P Single-ended, 50Ω load, RVO = 953Ω 400 mVP-P Supply Current 50 59 mA AC Electrical Characteristics Over recommended supply voltage and operating temperature ranges, unless otherwise specified. (Note 2, Note 3) Symbol Parameter DRIN Input Data Rate tTLH Transition Time Low to High tTHL Transition Time High to Low Conditions Reference Min Typ IN+, IN20% - 80% (Note 4) OU++, OUT- Max Units 3125 Mbps 90 130 ps 90 130 ps Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device my occur, including inoperability and degradation of device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in the Recommended Operating Conditions is not implied. The Recommended Operating Conditions indicate conditions at which the device is functional and the device should not be operated beyond such conditions. Note 2: The Electrical Characteristics tables list guaranteed specifications under the listed Recommended Operating Conditions except as otherwise modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not guaranteed. Note 3: Typical values represent most likely parametric norms at VCC = +3.3V, TA = +25°C, and at the Recommended Operating Conditions at the time of product characterization and are not guaranteed. Note 4: Specification is guaranteed by characterization and is not tested in production. www.ti.com 4 INPUT INTERFACING The DS30BA101 accepts either differential or single-ended input. DC-coupled inputs must be kept within the specified common-mode range. Application Information CABLE EXTENDER APPLICATION The DS30BA101 together with the DS30EA101 form a cable extender chipset optimized for extending serial data streams from serializer/deseralizer (SerDes) pairs and FPGAs over 100Ω differential cables and 75Ω coaxial cables. Setting the correct DS30BA101 output amplitude and proper cable termination are essential for optimal operation. Figure 1 shows the recommended chipset configuration for 100Ω differential cable and Figure 2 shows the recommended chipset configuration for 75Ω coaxial cable. OUTPUT INTERFACING The DS30BA101 uses current mode outputs. Single-ended output levels are 800 mVP-P into 75Ω AC-coupled coaxial cable with an RVO resistor of 750Ω, or 400 mVP-P (800 mVP-P differential) into 100Ω differential cable with an RVO resistor of 953Ω. The output voltage level is controlled by the value of the RVO resistor connected between the RVO pin and VCC. The RVO resistor should be placed as close as possible to the RVO pin. In addition, the copper in the plane layers below the RVO network should be removed to minimize parasitic capacitance. 30152031 FIGURE 1. Cable Extender Chipset Application Circuit for 100Ω Differential Cable 30152032 FIGURE 2. Cable Extender Chipset Application Circuit for 75Ω Coaxial Cable 5 www.ti.com DS30BA101 Figure 1 and Figure 2 show the typical configurations for differential output and single-ended output, respectively. For single-ended output, the unused output must be properly terminated as shown. Device Operation DS30BA101 Physical Dimensions inches (millimeters) unless otherwise noted 16-Pin LLP Order Number DS30BA101SQ Package Number SQB16A www.ti.com 6 DS30BA101 Notes 7 www.ti.com DS30BA101 3.125 Gbps Differential Buffer Notes www.ti.com IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. 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