XL1050

High speed CAN transceiver XL1050 SOP8 FEATURES GENERAL DESCRIPTION • High speed (up to 1 Mbaud) The XL1050 is the interface between the Controller Area Network (CAN) protocol controller and the physical bus. The device provides differential transmit capability to the bus and differential receive capability to the CAN controller. • Very low ElectroMagnetic Emission (EME) • Differential receiver with wide common-mode range for high ElectroMagnetic Immunity (EMI) • An unpowered node does not disturb the bus lines • Transmit Data (TXD) dominant time-out function • Much lower electromagnetic emission due to optimal matching of the output signals CANH and CANL • Silent mode in which the transmitter is disabled • Bus pins protected against transients in an automotive environment • Improved behaviour in case of an unpowered node • No standby mode. • Input levels compatible with 3.3 V and 5 V devices This makes the XL1050 eminently suitable for use in nodes that are in a power-down situation in partially powered networks. • Thermally protected • Short-circuit proof to battery and to ground • At least 110 nodes can be connected. QUICK REFERENCE DATA SYMBOL PARAMETER VCC supply voltage CONDITIONS MIN. MAX. UNIT 4.75 5.25 V VCANH DC voltage at pin CANH 0 < VCC < 5.25 V; no time limit −27 +40 V VCANL DC voltage at pin CANL 0 < VCC < 5.25 V; no time limit −27 +40 V Vi(dif)(bus) differential bus input voltage dominant 1.5 3 V tPD(TXD-RXD) propagation delay TXD to RXD VS = 0 V; see Fig.7 − 250 ns Tvj virtual junction temperature −40 +150 °C 1 High speed CAN transceiver XL1050 SOP8 BLOCK DIAGRAM VCC handbook, full pagewidth S 3 8 30 µA VCC GND TEMPERATURE PROTECTION 200 µA TXD TXD DOMINANT TIME-OUT TIMER 1 DRIVER 7 VCC RXD CANH 25 kΩ 4 RECEIVER 0.5VCC 25 kΩ GND GND CANL 6 Vref 5 REFERENCE VOLTAGE XL1050 2 GND Block diagram. PINNING SYMBOL PIN DESCRIPTION TXD 1 transmit data input; reads in data from the CAN controller to the bus line drivers GND 2 ground VCC 3 supply voltage RXD 4 receive data output; reads out data from the bus lines to the CAN controller Vref 5 reference voltage output CANL 6 LOW-level CAN bus line CANH 7 HIGH-level CAN bus line S 8 select input for high-speed mode or silent mode handbook, halfpage TXD 1 8 S GND 2 7 CANH XL1050 VCC 3 6 CANL RXD 4 5 Vref Pin configuration. 2 High speed CAN transceiver XL1050 SOP8 Control pin S allows two operating modes to be selected: high-speed mode or silent mode. FUNCTIONAL DESCRIPTION The XL1050 is the interface between the CAN protocol controller and the physical bus. It is primarily intended for high-speed automotive applications using baud rates from 60 kbaud up to 1 Mbaud. It provides differential transmit capability to the bus and differential receiver capability to the CAN protocol controller. The high-speed mode is the normal operating mode and is selected by connecting pin S to ground. It is the default mode if pin S is not connected. However, to ensure EMI performance in applications using only the high-speed mode, it is recommended that pin S is connected to ground. A current-limiting circuit protects the transmitter output stage from damage caused by accidental short-circuit to either positive or negative supply voltage, although power dissipation increases during this fault condition. In the silent mode, the transmitter is disabled. All other IC functions continue to operate. The silent mode is selected by connecting pin S to VCC and can be used to prevent network communication from being blocked, due to a CAN controller which is out of control. A thermal protection circuit protects the IC from damage by switching off the transmitter if the junction temperature exceeds a value of approximately 165 °C. Because the transmitter dissipates most of the power, the power dissipation and temperature of the IC is reduced. All other IC functions continue to operate. The transmitter off-state resets when pin TXD goes HIGH. The thermal protection circuit is particularly needed when a bus line short-circuits. A ‘TXD dominant time-out’ timer circuit prevents the bus lines being driven to a permanent dominant state (blocking all network communication) if pin TXD is forced permanently LOW by a hardware and/or software application failure. The timer is triggered by a negative edge on pin TXD. If the duration of the LOW-level on pin TXD exceeds the internal timer value, the transmitter is disabled, driving the bus into a recessive state. The timer is reset by a positive edge on pin TXD. The pins CANH and CANL are protected from automotive electrical transients . Table 1 Function table of the CAN transceiver; X = don’t care VCC TXD S CANH CANL BUS STATE RXD 4.75 V to 5.25 V LOW LOW (or floating) HIGH LOW dominant LOW 4.75 V to 5.25 V X HIGH 0.5VCC 0.5VCC recessive HIGH 4.75 V to 5.25 V HIGH (or floating) X 0.5VCC 0.5VCC recessive HIGH 2 V X 0 V < VCANH < VCC 0 V < VCANL < VCC recessive X 3 High speed CAN transceiver XL1050 SOP8 LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 60134). All voltages are referenced to GND (pin 2). Positive currents flow into the IC. SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT −0.3 +6 V 0 < VCC < 5.25 V; no time limit −27 +40 V 0 < VCC < 5.25 V; no time limit −27 +40 V DC voltage at pin TXD −0.3 VCC + 0.3 V VRXD DC voltage at pin RXD −0.3 VCC + 0.3 V Vref DC voltage at pin Vref −0.3 VCC + 0.3 V VS DC voltage at pin S −0.3 VCC + 0.3 V Vtrt(CANH) transient voltage at pin CANH note 1 −200 +200 V Vtrt(CANL) transient voltage at pin CANL note 1 −200 +200 V Vesd electrostatic discharge voltage at all pins note 2 −4000 +4000 V −200 +200 V −55 +150 °C −40 +150 °C VCC supply voltage VCANH DC voltage at pin CANH VCANL DC voltage at pin CANL VTXD note 3 Tstg storage temperature Tvj virtual junction temperature note 4 Notes 1. Human body model: C = 100 pF and R = 1.5 kΩ. 2. Machine model: C = 200 pF, R = 10 Ω and L = 0.75 µH. 3. In accordance with “IEC 60747-1”. An alternative definition of Tvj is: Tvj = Tamb + P × Rth(vj-a), where Rth(vj-a) is a fixed value to be used for the calculation of Tvj. The rating for Tvj limits the allowable combinations of power dissipation (P) and ambient temperature (Tamb). THERMAL CHARACTERISTICS According to IEC 60747-1. SYMBOL PARAMETER CONDITIONS VALUE UNIT Rth(vj-a) thermal resistance from junction to ambient in SO8 package in free air 145 K/W Rth(vj-s) thermal resistance from junction to substrate of bare die in free air 50 K/W 4 High speed CAN transceiver XL1050 SOP8 CHARACTERISTICS VCC = 4.75 V to 5.25 V; Tvj = −40 °C to +150 °C; RL = 60 Ω unless specified otherwise; all voltages are referenced to GND (pin 2); positive currents flow into the IC; see notes 1 and 2. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Supply (pin VCC) ICC supply current dominant; VTXD = 0 V 25 50 75 mA recessive; VTXD = VCC 2.5 5 10 mA Transmitter data input (pin TXD) VIH HIGH-level input voltage output recessive 2.0 − VCC + 0.3 V VIL LOW-level input voltage output dominant −0.3 − +0.8 V IIH HIGH-level input current VTXD = VCC −5 0 +5 µA IIL LOW-level input current VTXD = 0 V −100 −200 −300 µA Ci input capacitance not tested − 5 10 pF silent mode 2.0 − VCC + 0.3 V Mode select input (pin S) VIH HIGH-level input voltage VIL LOW-level input voltage high-speed mode −0.3 − +0.8 V IIH HIGH-level input current VS = 2 V 20 30 50 µA IIL LOW-level input current VS = 0.8 V 15 30 45 µA Receiver data output (pin RXD) IOH HIGH-level output current VRXD = 0.7VCC −2 −6 −15 mA IOL LOW-level output current VRXD = 0.45 V 2 8.5 20 mA −50 µA < IVref < +50 µA 0.45VCC 0.5VCC 0.55VCC V Reference voltage output (pin Vref) Vref reference output voltage Bus lines (pins CANH and CANL) Vo(reces)(CANH) recessive bus voltage at pin CANH VTXD = VCC; no load 2.0 2.5 3.0 V Vo(reces)(CANL) recessive bus voltage at pin CANL VTXD = VCC; no load 2.0 2.5 3.0 V Io(reces)(CANH) recessive output current at pin CANH −27 V < VCANH < +32 V; −2.0 0 V < VCC < 5.25 V − +2.5 mA Io(reces)(CANL) recessive output current at pin CANL −27 V < VCANL < +32 V; 0 V < VCC < 5.25 V −2.0 − +2.5 mA Vo(dom)(CANH) dominant output voltage at pin CANH VTXD = 0 V 3.0 3.6 4.25 V Vo(dom)(CANL) dominant output voltage at pin CANL VTXD = 0 V 0.5 1.4 1.75 V Vi(dif)(bus) differential bus input voltage (VCANH − VCANL) VTXD = 0 V; dominant; 42.5 Ω < RL < 60 Ω 1.5 2.25 3.0 V VTXD = VCC; recessive; no load −50 0 +50 mV 5 High speed CAN transceiver SYMBOL PARAMETER XL1050 SOP8 CONDITIONS MIN. TYP. MAX. UNIT Io(sc)(CANH) short-circuit output current at VCANH = 0 V; VTXD = 0 V −45 pin CANH −70 −95 mA Io(sc)(CANL) short-circuit output current at VCANL = 36 V; pin CANL VTXD = 0 V 45 70 100 mA Vi(dif)(th) differential receiver threshold −12 V < VCANL < +12 V; 0.5 voltage −12 V < VCANH < +12 V; see Fig.5 0.7 0.9 V Vi(dif)(hys) differential receiver input voltage hysteresis −12 V < VCANL < +12 V; 50 −12 V < VCANH < +12 V; see Fig.5 70 100 mV Ri(cm)(CANH) common mode input resistance at pin CANH 15 25 35 kΩ Ri(cm)(CANL) common mode input resistance at pin CANL 15 25 35 kΩ Ri(cm)(m) matching between pin CANH and pin CANL common mode input resistance −3 0 +3 % Ri(dif) differential input resistance 25 50 75 kΩ Ci(CANH) input capacitance at pin CANH VTXD = VCC; not tested − 7.5 20 pF Ci(CANL) input capacitance at pin CANL VTXD = VCC; not tested − 7.5 20 pF Ci(dif) differential input capacitance VTXD = VCC; not tested − 3.75 10 pF ILI(CANH) input leakage current at pin CANH VCC = 0 V; VCANH = 5 V 100 170 250 µA ILI(CANL) input leakage current at pin CANL VCC = 0 V; VCANL = 5 V 100 170 250 µA 155 165 180 °C VCANH = VCANL Thermal shutdown Tj(sd) shutdown junction temperature Timing characteristics (see Figs.6 and 7) td(TXD-BUSon) delay TXD to bus active VS = 0 V 25 55 110 ns td(TXD-BUSoff) delay TXD to bus inactive VS = 0 V 25 60 95 ns td(BUSon-RXD) delay bus active to RXD VS = 0 V 20 50 110 ns td(BUSoff-RXD) delay bus inactive to RXD VS = 0 V 45 95 155 ns tdom(TXD) TXD dominant time for time-out VTXD = 0 V 250 450 750 µs Notes 1. All parameters are guaranteed over the virtual junction temperature range by design, but only 100 % tested at 125 °C ambient temperature for dies on wafer level and in addition to this 100 % tested at 25 °C ambient temperature for cased products, unless specified otherwise. 2. For bare die, all parameters are only guaranteed if the backside of the bare die is connected to ground. 6 High speed CAN transceiver XL1050 SOP8 APPLICATION AND TEST INFORMATION handbook, full pagewidth +5 V 47 nF 100 nF 60 Ω 60 Ω VCC 3 TXD TX0 1 7 XL1000 Vref CAN CONTROLLER 5 CAN BUS LINE XL1050 6 RXD RX0 CANH CANL 4 2 8 GND S 60 Ω MICROCONTROLLER 47 nF Application information. handbook, full pagewidth +5 V 100 nF VCC TXD Vref RXD 3 1 5 7 CANH 1 nF TRANSIENT GENERATOR XL1050 6 4 2 15 pF 60 Ω CANL 1 nF 8 GND S Test circuit for automotive transients. 7 High speed CAN transceiver XL1050 SOP8 handbook, full pagewidth VRXD HIGH LOW hysteresis 0.5 0.9 Vi(dif)(bus) (V) Hysteresis of the receiver. +5 V handbook, halfpage 100 nF VCC TXD Vref RXD 3 1 5 7 RL 60 Ω XL1050 6 4 2 15 pF CANH CL 100 pF CANL 8 GND S Test circuit for timing characteristics. 8 High speed CAN transceiver XL1050 SOP8 HIGH handbook, full pagewidth TXD LOW CANH CANL dominant (BUS on) 0.9 V Vi(dif)(bus)(1) 0.5 V recessive (BUS off) HIGH RXD 0.7VCC 0.3VCC LOW t d(TXD-BUSon) t d(TXD-BUSoff) t d(BUSon-RXD) t d(BUSoff-RXD) t PD(TXD-RXD) t PD(TXD-RXD) (1) Vi(dif)(bus) = VCANH − VCANL. Timing diagram for AC characteristics. handbook, full pagewidth TX XL1050 CANL 6.2 kΩ CANH 6.2 kΩ 30 Ω 10 nF ACTIVE PROBE 30 Ω SPECTRUMANALYZER 47 nF GND test PCB Basic test set-up (with split termination) for electromagnetic emission measurement 9 High speed CAN transceiver XL1050 SOP8 handbook, full pagewidth TX XL1050 CANL 30 Ω CANH 30 Ω 4.7 nF RF VOLTMETER AND POWER AMPLIFIER 50 Ω RX RF SIGNAL GENERATOR XL1050 GND test PCB Basic test set-up for electromagnetic immunity measurement 30 handbook, full pagewidth VRF(rms) (V) max RF voltage reached with no errors 20 10 0 10−1 1 10 Data rate of 500 kbits/s. Typical electromagnetic immunity. 10 102 f (MHz) 103 High speed CAN transceiver XL1050 SOP8 11