ADM101E_V01 AD | Alldatasheet

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  • Manufacturer or author: Analog Devices, Inc.
  • PDF pages: 12

Technical content

Craft Port™ Tiny RS-232 Transceiver for Portable Applications Data Sheet ADM101E

FEATURES

460 kbit/s Transmission Rate Single 5 V Power Supply Compatible with RS-232 Input/Output Levels 0.1 μF Charge Pump Capacitors One Driver and One Receiver On-Board DC-DC Converter ±4.2 V Output Swing with 5 V Supply Low Power BiCMOS: 500 μA ICC Ultralow Power (1 μA) Shutdown Mode 10-Lead MSOP Package Qualified for Automotive Applications

APPLICATIONS

Figure 1. GENERAL DESCRIPTION The ADM101E is a single channel RS-232 driver and receiver in the Analog Devices Craft Port series, designed to operate from a single, 5 V supply. A highly efficient charge-pump voltage inverter generates an on-chip −5 V supply, which eliminates the need for a negative power supply for the driver and permits RS-232 compatible output levels to be developed using charge pump capacitors as small as 0.1 μF. A shutdown input disables the charge pump and puts the device into a low power shutdown mode, in which the current consumption is typically less than 1 μA. The transmitter is disabled during shutdown but the receiver remains functional. An epitaxial BiCMOS construction minimizes power consumption to 3 mW and also guards against latch-up. Overvoltage protection is provided allowing the receiver inputs to withstand continuous voltages in excess of ±30 V . In addition, all I-O pins have ESD protection to levels greater than 15 kV . The ADM101E is available in a 10-lead MSOP package, which makes it ideal for serial communications in small, portable applications such as palmtop computers and mobile telephones, where a full, RS-232 serial interface is not required, but compact size and low power drain are paramount. Craft Port is a trademark of Analog Devices, Inc. Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Tel: 781.329.4700 ©2001–2014 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com

REVISION HISTORY

3/14—Rev. A to Rev. B 2/01—Rev. 0 to Rev. A Rev. B | Page 2 of 12

VCC = 5 V ± 10%, C1 = C2 = 0.1 μF. All specifications TMIN to TMAX unless otherwise noted. Table 1. Parameter Min Typ Max Unit Test Conditions/Comments Output Voltage Swing ±3.5 ±4.2 V VCC = 5 V ± 5%, TOUT Loaded with 3 kΩ to GND ±3.25 ±4.2 V VCC = 5 V ± 10%, TOUT Loaded with 3 kΩ to GND VCC Power Supply Current (Unloaded) 0.5 1 mA No Load, TIN = VCC or GND VCC Power Supply Current (Loaded) 1.85 2.5 mA TOUT Loaded with 3 kΩ to GND VCC Power Supply Current (Shutdown) 1 μA SD Input = VCC Input Logic Threshold Low, VINL 0.8 V Input Logic Threshold High, VINH 2.4 V Input Leakage Current ±1 μA RS-232 Input Voltage Range −15 +15 V RS-232 Input Threshold Low 0.8 2.2 V RS-232 Input Threshold High 2.4 2.6 V RS-232 Input Hysteresis 0.2 V RS-232 Input Resistance 3 5 7 kΩ TTL/CMOS Output Voltage Low, VOL 0.4 V IOUT = 1.6 mA TTL/CMOS Output Voltage High, VOH 3.5 V IOUT = −1.0 mA Propagation Delay 0.25 μs RS-232 to TTL Instantaneous Slew Rate1 25 V/μs CL = 10 pF, RL = 3 kΩ − 7 kΩ, TA = 25°C Transition Region Slew Rate 11 V/μs RL = 3 kΩ, CL = 1000 pF Measured from +3 V to −3 V or Vice Versa Baud Rate 460 kB RL = 3 kΩ, CL = 1 nF Output Resistance 300 Ω VCC = 0 V, VOUT = ±2 V RS-232 Output Short Circuit Current ±25 ±60 mA 1 Sample tested to ensure compliance. Rev. B | Page 3 of 12

TA = 25°C unless otherwise noted. Table 2. Parameter Rating VCC 6 V V− +0.3 V to −6 V Input Voltages Driver Input TIN −0.3 V to (VCC, +0.3 V) Receiver Input RIN ±30 V Output Voltages Driver Output TOUT (VCC, +0.3 V) to (V−, −0.3 V) Receiver Output ROUT −0.3 V to (VCC +0.3 V) Short Circuit Duration TOUT Continuous Power Dissipation RM-10 (Derate 12 mW/°C above 70°C) 1488 mW Thermal Impedance 135°C/W Operating Temperature Range Industrial (A Version) −40°C to +85°C Storage Temperature Range −65°C to +150°C Lead Temperature Soldering Vapor Phase (60 sec) 215°C Infrared (15 sec) 220°C ESD Rating >2000 V ESD Rating (I-O Pins) 15 kV Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ESD CAUTION Rev. B | Page 4 of 12

Figure 2. Pin Configuration Table 3. Pin Function Descriptions 1 GND Ground Pin. Must be connected to 0 V. 2 C1− Negative Terminal of C1 (if C1 is Polarized Capacitor). 3 V− Internally Generated Negative Supply Voltage. 4 TIN Driver Input (3 V to 5 V TTL/CMOS Logic Levels). 5 ROUT Receiver Output (3 V to 5 V TTL/CMOS Logic Levels). 6 RIN Receiver Input (EIA-232 Signal Levels). 7 TOUT Driver Output (EIA-232 Signal Levels). 8 SD Shutdown Input. Logic 1 on this input puts the ADM101E into low power shutdown mode. 9 C1+ Positive Terminal of Charge Pump Capacitor (if C1 is Polarized Capacitor). 10 VCC Positive Power Supply, Nominally 5 V.

The ADM101E is an RS-232 compatible line driver/receiver in the Analog Devices Craft Port series, containing one driver (transmitter) and one receiver. It is ideal for serial communication in small portable devices such as mobile telephones, palmtop personal computers and personal digital assistants, where a full, RS-232 serial interface is not required, and only Tx and Rx lines are required for low speed communication between devices. The ADM101E operates from a single, 5 V supply, and generates its own, on-chip, −5 V power supply, thus removing the need for a negative power supply for the driver. Rev. B | Page 8 of 12

  1. A charge pump dc-to-dc converter.
  2. 5 V logic to EIA-232 driver.
  3. EIA-232 to 5 V logic receiver.

the 5 V supply, thus removing the need for a separate −5 V rail. and two external capacitors, as shown in Figure 9. Figure 9. Charge Pump DC–DC Converter the current drawn increases. tantalum capacitors, do not forget to observe polarity. output voltage swing is typically ±4.2 V . switching thresholds are 0.8 V minimum and 2.8 V maximum. level for unconnected inputs or for inputs connected to GND. inputs and for inputs with slow transition times.

The shutdown input allows the ADM101E to be put into an ultralow power mode where the dc-dc converter is switched off and the transmitter is disabled. The receiver remains active during shutdown. Logic 0 at this input enables the ADM101E, while a Logic 1 at this input shuts down the ADM101E. Rev. B | Page 10 of 12

0.50 BSC

1.10 MAX

Figure 10. 10-Lead Mini Small Outline Package [MSOP] 2 W = Qualified for Automotive Applications. obtain the specific Automotive Reliability reports for these models.

©2001–2014 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the p roperty of their respective owners. D00053-0-3/14(B) Rev. B | Page 12 of 12