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LTC2845 Datasheet(PDF) 3 Page - Linear Technology |
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LTC2845 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 20 page  3 LTC2845 sn2845 2845fs The q denotes specifications which apply over the full operating tempera- ture range, otherwise specifications are at TA = 25°C. VCC = 5V, VIN = 3.3V, VDD = 8V, VEE = – 7V for V.28, – 5.5V for V.10, V.11 (Notes 2, 3) ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IEE VEE Supply Current (DCE Mode, RS530, RS530-A, X.21 Modes, No Load 2 mA All Digital Pins = GND or VIN) RS530, X.21 Modes, Full Load 23 mA RS530-A, Full Load 34 mA V.28 Mode, No Load 1 mA V.28 Mode, Full Load 12 mA No-Cable Mode 10 µA IDD VDD Supply Current (DCE Mode, RS530, RS530-A, X.21 Modes, No Load 0.3 mA All Digital Pins = GND or VIN) RS530, RS530-A, X.21 Modes, Full Load 0.3 mA V.28 Mode, No Load 1 mA V.28 Mode, Full Load 13.5 mA No-Cable Mode 10 µA IVIN VIN Supply Current (DCE Mode, All Modes Except No-Cable Mode 650 µA All Digital Pins = GND or VIN) PD Internal Power Dissipation (DCE Mode, RS530, RS530-A, X.21 Modes, Full Load 240 mW All Digital Pins = GND or VIN) V.28 Mode, Full Load 64 mW Logic Inputs and Outputs VIH Logic Input High Voltage q 2V VIL Logic Input Low Voltage VCC = 5V q 0.8 V R4EN when VCC = 3.3V 0.5 V IIN Logic Input Current D1, D2, D3, D4, D5 q ±10 µA M0, M1, M2, DCE, D4ENB, R4EN = GND q –30 –75 –120 µA M0, M1, M2, DCE, D4ENB, R4EN = VIN q ±10 µA VOH Output High Voltage IO = –3mA q 2.7 3 V VOL Output Low Voltage IO = 1.6mA q 0.2 0.4 V IOSR Output Short-Circuit Current 0V ≤ VO ≤ VIN q ±50 mA IOZR Three-State Output Current M0 = M1 = M2 = VIN, VO = GND q –30 –85 –160 µA M0 = M1 = M2 = VIN, VO = VIN q ±10 µA V.11 Driver VODO Open Circuit Differential Output Voltage RL = 1.95k (Figure 1) q ±5V VODL Loaded Differential Output Voltage RL = 50Ω (Figure 1) 0.5VODO 0.67VODO V q ±2V ∆VOD Change in Magnitude of Differential RL = 50Ω (Figure 1) q 0.2 V Output Voltage VOC Common Mode Output Voltage RL = 50Ω (Figure 1) q 3V ∆VOC Change in Magnitude of Common Mode RL = 50Ω (Figure 1) q 0.2 V Output Voltage ISS Short-Circuit Current VOUT = GND ±150 mA IOZ Output Leakage Current –0.25V ≤ VO ≤ 0.25V, Power Off or q ±1 ±100 µA No-Cable Mode or Driver Disabled tr, tf Rise or Fall Time LTC2845C (Figures 2, 5) q 215 25 ns LTC2845I (Figures 2, 5) q 215 35 ns tPLH Input to Output LTC2845C (Figures 2, 5) q 20 40 65 ns LTC28451 (Figures 2, 5) q 20 40 75 ns tPHL Input to Output LTC2845C (Figures 2, 5) q 20 40 65 ns LTC2845I (Figures 2, 5) q 20 40 75 ns ∆t Input to Output Difference, tPLH – tPHL LTC2845C (Figures 2, 5) q 03 12 ns LTC2845I (Figures 2, 5) q 03 17 ns tSKEW Output to Output Skew (Figures 2, 5) 3 ns |
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