Datasheet LTM2881 (Analog Devices) - 4

LTM2881
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. LTM2881-3 VCC = 3.3V, LTM2881-5 VCC = 5.0V, VL = 3.3V, GND = GND2 = 0V, ON = VL unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Power Supply
VCC VCC Supply Voltage LTM2881-3 l 3.0 3.3 3.6 V LTM2881-5 l 4.5 5.0 5.5 V VL VL Supply Voltage l 1.62 5.5 V ICCPOFF VCC Supply Current in Off Mode ON = 0V l 0 10 µA ICCS VCC Supply Current in On Mode LTM2881-3 DE = 0V, RE = VL, No Load l 20 30 mA LTM2881-5 DE = 0V, RE = VL, No Load l 15 25 mA VCC2 Regulated VCC2 Output Voltage, LTM2881-3 DE = 0V, RE = VL, ILOAD = 100mA l 4.75 5.0 V Loaded LTM2881-5 DE = 0V, RE = VL, ILOAD = 150mA l 4.75 5.0 V LTM2881-3, H/MP-Grade, ILOAD = 90mA l 4.75 V VCC2NOLOAD Regulated VCC2 Output Voltage, DE = 0V, RE = VL, No Load 4.8 5.0 5.35 V No Load Efficiency ICC2 = 100mA, LTM2881-5 (Note 2) 62 % ICC2S VCC2 Short-Circuit Current DE = 0V, RE = VL, VCC2 = 0V 200 mA
Driver
|VOD| Differential Driver Output Voltage R = ∞ (Figure 1) l VCC2 V R = 27Ω (RS485) (Figure 1) l 2.1 VCC2 V R = 50Ω (RS422) (Figure 1) l 2.1 VCC2 V ∆|VOD| Difference in Magnitude of Driver R = 27Ω or R = 50Ω (Figure 1) l 0.2 V Differential Output Voltage for Complementary Output States VOC Driver Common Mode Output R = 27Ω or R = 50Ω (Figure 1) l 3 V Voltage ∆|VOC| Difference in Magnitude of Driver R = 27Ω or R = 50Ω (Figure 1) l 0.2 V Common Mode Output Voltage for Complementary Output States IOZD Driver Three-State (High DE = 0V, (Y or Z) = –7V, +12V l ±10 µA Impedance) Output Current on DE = 0V, (Y or Z) = –7V, +12V, H/MP-Grade l ±50 µA Y and Z IOSD Maximum Driver Short-Circuit –7V ≤ (Y or Z) ≤ 12V (Figure 2) l – 250 250 mA Current
Receiver
RIN Receiver Input Resistance RE = 0V or VL, VIN = –7V, –3V, 3V, 7V, 12V (Figure 3) l 96 125 kΩ RE = 0V or VL, VIN = –7V, –3V, 3V, 7V, 12V (Figure 3), l 48 125 kΩ H/MP-Grade RTE Receiver Termination Resistance TE = VL, VAB = 2V, VB = –7V, 0V, 10V (Figure 8) l 108 120 156 Ω Enabled IIN Receiver Input Current (A, B) ON = 0V VCC2 = 0V or 5V, VIN = 12V (Figure 3) l 125 µA ON = 0V VCC2 = 0V or 5V, VIN = 12V (Figure 3), H/MP-Grade l 250 ON = 0V VCC2 = 0V or 5V, VIN = –7V (Figure 3) l –100 µA ON = 0V VCC2 = 0V or 5V, VIN = –7V (Figure 3), H/MP-Grade l –145 VTH Receiver Differential Input –7V ≤ B ≤ 12V l –0.2 0.2 V Threshold Voltage (A-B) ∆VTH Receiver Input Failsafe Hysteresis B = 0V 25 mV Receiver Input Failsafe Threshold B = 0V –0.2 –0.05 0 V 2881fi 4 For more information www.linear.com/LTM2881 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Switching Characteristics Isolation Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuits Functional Table Applications Information Typical Applications Package Description Revision History Typical Application Related Parts