High Speed, 5 V, 0.1 F CMOS RS-232 Driver/Receiver ADM202 Data Sheet FEATURES TYPICAL APPLICATION CIRCUIT 5V INPUT 120 kB transmission rate Small (0.1 F) charge pump capacitors Single 5 V power supply Meets TIA/EIA-232-E and V.28 specifications 2 drivers and 2 receivers On-board dc-to-dc converters 9 V output swing with 5 V supply Low power BiCMOS: 2.5 mA ICC 30 V receiver input levels 0.1F + 6.3V 0.1F + 16V T1IN 1 C1+ 3 C1- 4 C2+ 5 C2- +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER VCC 16 V+ 2 0.1F + 16V 14 T1OUT 7 T2OUT RS-232 OUTPUTS TTL/CMOS INPUTS1 APPLICATIONS Computers Peripherals Modems Printers Instruments + 0.1F 6.3V V- 6 T1 11 0.1F + 6.3V T2IN 10 R1OUT 12 R1 13 R1IN R2OUT 9 R2 8 R2IN T2 RS-232 INPUTS2 TTL/CMOS OUTPUTS GND ADM202 1INTERNAL 400k PULL-UP RESISTOR ON EACH TTL/CMOS INPUT. 2INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT. 00065-001 15 Figure 1. GENERAL DESCRIPTION The ADM202 is a 2-channel RS-232 line driver/receiver pair designed to operate from a single 5 V power supply. A highly efficient on-chip charge pump design permits RS-232 levels to be developed using charge pump capacitors as small as 0.1 F. This converter generates 10 V RS-232 output levels. An epitaxial BiCMOS construction minimizes power consumption to 10 mW and guards against latch-up. Overvoltage protection is provided, allowing the receiver inputs to withstand continuous voltages in excess of 30 V. In addition, all pins contain ESD protection to levels greater than 2 kV. The ADM202 meets or exceeds the TIA/EIA-232-E and V.28 specifications. Fast driver slew rates permit 120 kB operation, and high drive currents allow extended cable lengths. The ADM202 is available in a 16-lead PDIP and both narrow and wide 16-lead SOIC packages. 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. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 (c)2016 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com ADM202 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................6 Applications ....................................................................................... 1 Theory of Operation .........................................................................7 Typical Application Circuit ............................................................. 1 Applications Information .................................................................8 General Description ......................................................................... 1 Charge Pump DC-to-DC Voltage Converter ............................8 Revision History ............................................................................... 2 TTL/CMOS to RS-232 Transmitters (Drivers) .........................8 Specifications..................................................................................... 3 RS-232 to TTL/CMOS Receivers ................................................8 Absolute Maximum Ratings ............................................................ 4 Outline Dimensions ..........................................................................9 ESD Caution .................................................................................. 4 Ordering Guide .......................................................................... 10 Pin Configuration and Function Descriptions ............................. 5 REVISION HISTORY 8/2016--Rev. A to Rev. B Updated Format .................................................................. Universal Deleted ADM203 ................................................................ Universal Changes to Typical Application Circuit Section Heading........... 1 Deleted ADM203 Functional Block Diagram Figure; Renumbered Sequentially................................................................ 1 Changes to Features Section and General Description Section . 1 Deleted ADM203 Pin Configuration Figure and Figure 1 ......... 3 Changed TIN to TxIN....................................................... Throughout Changes to Table 2.............................................................................4 Changes to Table 3.............................................................................5 Changes to Theory of Operation Section.......................................7 Changes to TTL/CMOS to RS-232 Transmitters (Drivers) Section and RS-232 to TLL/CMOS Receivers Section .................8 Updated Outline Dimensions ..........................................................9 Changes to Ordering Guide .......................................................... 10 1/2001--Rev. 0 to Rev. A Rev. B | Page 2 of 10 Data Sheet ADM202 SPECIFICATIONS VCC = 5 V 10%, (C1 to C4 = 0.1 F). All specifications TMIN to TMAX, unless otherwise noted. Table 1. Parameter OUTPUT VOLTAGE SWING VCC POWER SUPPLY CURRENT (ICC) INPUT LOGIC THRESHOLD Low, VINL High, VINH LOGIC PULL-UP CURRENT RS-232 INPUT Voltage Range Threshold Low High Hysteresis Resistance TTL/CMOS Output Voltage Low, VOL High, VOH PROPAGATION DELAY TRANSITION REGION SLEW RATE BAUD RATE OUTPUT Output Resistance RS-232 Output Short-Circuit Current Min 5 5 Typ 9 9 2.5 Max Unit V V mA Test Conditions/Comments VCC = 5 V 5%; T1OUT and T2OUT loaded with 3 k to GND VCC = 5 V 10%; TA = 25C; T1OUT and T2OUT loaded with 3 k to GND No load; T1IN and T2IN = VCC, or T1IN and T2IN = GND 25 V V A TxIN TxIN TxIN = 0 V +30 V 2.4 1.0 7 V V V k TA = 0C to 85C V V s V/s kB IOUT = 1.6 mA IOUT = -1.0 mA RS-232 to TTL RL = 3 k, CL = 1000 pF, measured from +3 V to -3 V or -3 V to +3 V RL = 3 k, CL = 1 nF mA VCC = V+ = V- = 0 V, VOUT = 2 V 6.0 0.8 2.4 12 -30 0.8 0.2 3 1.2 1.6 0.4 5 0.4 3.5 0.3 8 5 10 60 120 300 Rev. B | Page 3 of 10 ADM202 Data Sheet ABSOLUTE MAXIMUM RATINGS TA = 25C, unless otherwise noted. Rating 6V (VCC - 0.3 V) to +14 V +0.3 V to -14 V Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product reliability. -0.3 V to (VCC + 0.3 V) 30 V ESD CAUTION Table 2. Parameter VCC V+ V- Input Voltages T1IN, T2IN R1IN, R2IN Output Voltages T1OUT, T2OUT R1OUT, R2OUT Short-Circuit Duration T1OUT, T2OUT Power Dissipation 16-Lead PDIP (N-16) 16-Lead SOIC (R-16) 16-Lead SOIC (RW-16) Thermal Impedance, JA 16-Lead PDIP (N-16) 16-Lead SOIC (R-16) 16-Lead SOIC (RW-16) Operating Temperature Range Commercial (J Version) Storage Temperature Range Lead Temperature Soldering Vapor Phase (60 sec) Infrared (15 sec) ESD Rating ((V+) + 0.3 V) to ((V-) - 0.3 V) -0.3 V to (VCC + 0.3 V) Continuous 470 mW 600 mW 500 mW 135C/W 105C/W 105C/W 0C to 70C -65C to +150C 215C 220C >2000 V Rev. B | Page 4 of 10 Data Sheet ADM202 C1+ 1 16 VCC V+ 2 15 GND T1OUT C1- 3 C2+ 4 C2- 5 ADM202 TOP VIEW (Not to Scale) 14 13 R1IN 12 R1OUT V- 6 T2OUT 7 11 T1IN 10 T2IN R2IN 8 9 R2OUT 00065-002 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Figure 2. Pin Configuration Table 3. Pin Function Descriptions Pin No. 1 2 3 4 5 6 7, 14 8, 13 Mnemonic C1+ V+ C1- C2+ C2- V- T2OUT, T1OUT R2IN, R1IN 9, 12 10, 11 R2OUT, R1OUT T2IN, T1IN 15 16 GND VCC Description External Positive Capacitor 1 Connection. The positive terminal is connected to this pin. Internally Generated Positive Supply (+10 V nominal). External Negative Capacitor 1 Connection. The negative terminal is connected to this pin. External Positive Capacitor 2 Connection. The positive terminal is connected to this pin. External Negative Capacitor 1 Connection. The negative terminal is connected to this pin. Internally Generated Negative Supply (-10 V Nominal). Transmitter (Driver) Outputs. These outputs are RS-232 levels (typically 10 V). Receiver Inputs. These inputs accept RS-232 signal levels. An internal 5 k pull-down resistor to GND is connected on each of these inputs. Receiver Outputs. These outputs are TTL/CMOS levels. Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels. An internal 400 k pull-up resistor to VCC is connected on each input. Ground. This pin must be connected to 0 V. Power Supply Input, 5 V 10%. Rev. B | Page 5 of 10 ADM202 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS 15 15 10 10 Tx OUTPUT VOLTAGE (V) V+ 5 V+, V- (V) Tx OUTPUT HIGH 0 -5 V- Tx OUTPUT HIGH LOADED 5 0 -5 -10 Tx OUTPUT LOW LOADED -10 10 15 20 25 30 LOAD CURRENT (mA) -15 4.0 15 VCC = 5V RL = 3k f = 10kHz Tx OUTPUT VOLTAGE (V) 10 LOW-TO-HIGH SLEW RATE 10 HIGH-TO-LOW SLEW RATE 5 0 -5 Tx OUTPUT LOW -10 0 0.5k 1.0k 1.5k 2.0k 2.5k 3.0k CAPACITIVE LOAD (pF) 00065-004 0 Tx OUTPUT HIGH -15 0 2 4 6 8 10 12 14 LOAD CURRENT (mA) Figure 4. Transmitter Slew Rate vs. Capacitive Load Figure 7. Transmitter (Tx) Output Voltage vs. Load Current T T 1 2 2 CH1 10.0V CH2 5.00V M1.00s CH1 LOADED SLEW RATE (1nF) -6.4V 00065-005 1 CH1 10.0V CH2 5.00V M1.00s CH2 UNLOADED SLEW RATE Figure 5. Transmitter Fully Loaded Slew Rate Figure 8. Transmitter Unloaded Slew Rate Rev. B | Page 6 of 10 -6.4V 00065-008 SLEW RATE (V/s) 20 5 5.5 Figure 6. Transmitter (Tx) Output Voltage vs. VCC 30 15 5.0 VCC (V) Figure 3. Charge Pump V+, V- vs. Load Current 25 4.5 00065-007 5 00065-003 0 00065-006 Tx OUTPUT LOW -15 Data Sheet ADM202 THEORY OF OPERATION The ADM202 is an RS-232 driver/receiver designed to solve interface problems by meeting the TIA/EIA-232E specifications while using a single digital 5 V supply. The EIA standard requires that transmitters deliver 5 V minimum on the transmission channel and that receivers can accept signal levels down to 3 V. The device achieves this by integrating step-up voltage converters and level shifting transmitters and receivers on the same chip. CMOS technology keeps the power dissipation to an absolute minimum. The ADM202 contains an internal voltage doubler and a voltage inverter that generates 10 V from the 5 V input. External 0.1 F capacitors are required for the internal voltage converter. Rev. B | Page 7 of 10 ADM202 Data Sheet APPLICATIONS INFORMATION The internal circuitry consists of three main sections, as follows: TTL/CMOS TO RS-232 TRANSMITTERS (DRIVERS) * * * The drivers convert TTL/CMOS input levels into TIA/EIA-232-E output levels. With VCC = 5 V and driving a typical TIA/EIA-232-E load, the output voltage swing is 9 V. Even under worst case conditions, the drivers are guaranteed to meet the 5 V TIA/EIA232-E minimum requirement. A charge pump dc-to-dc voltage converter TTL/CMOS to RS-232 transmitters RS-232 to TTL/CMOS receivers CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER The charge pump voltage converter consists of an oscillator and a switching matrix. The converter generates a 10 V supply from the input 5 V level in two stages, using a switched capacitor technique as illustrated in Figure 9 and Figure 10. First, the 5 V input supply is doubled to 10 V using Capacitor C1 as the charge storage element. The 10 V level is then inverted to generate -10 V using C2 as the storage element. Capacitors C3 and C4 reduce the output ripple. Their values are not critical and can be reduced if higher levels of ripple are acceptable. The charge pump capacitors, C1 and C2, can also be reduced at the expense of higher output impedance on the V+ and V- supplies. The V+ and V- supplies can be used to power external circuitry if the current requirements are small. S1 S3 VCC V+ = 2VCC C1 + C3 S2 + S4 VCC 00065-009 GND INTERNAL OSCILLATOR Figure 9. Charge Pump Voltage Doubler S1 S3 V+ FROM VOLTAGE DOUBLER The input threshold levels are both TTL and CMOS compatible with the switching threshold set at VCC/4. With a nominal VCC = 5 V, the switching threshold is 1.25 V typical. Unused inputs can be left unconnected, as an internal 400 k pull-up resistor pulls them high, forcing the outputs into a low state. As required by the TIA/EIA-232-E standard, the slew rate is limited to less than 30 V/s without the need for an external slew limiting capacitor, and the output impedance in the powerdown state is greater than 300 . RS-232 TO TTL/CMOS RECEIVERS The receivers are inverting level shifters that accept TIA/EIA-232-E input levels (5 V to 15 V) and translate them into 5 V TTL/ CMOS levels. The inputs have internal 5 k pull-down resistors to ground and are protected against overvoltages of up to 30 V. The guaranteed switching thresholds are 0.8 V (VINL) and 2.4 V (VINH), which are well within the 3 V TIA/EIA-232-E requirement. The low level threshold is deliberately positive because it ensures that an unconnected input is interpreted as a low level. The receivers have a Schmitt triggered input with a hysteresis level of 0.5 V. This hysteresis level ensures error free reception, both for noisy inputs and for inputs with slow transition times. GND C2 S2 + C4 + S4 V- = -(V+) 00065-010 GND INTERNAL OSCILLATOR Figure 10. Charge Pump Voltage Inverter Rev. B | Page 8 of 10 Data Sheet ADM202 OUTLINE DIMENSIONS 0.775 0.755 0.735 9 PIN 1 INDICATOR 0.280 0.250 0.240 1 8 TOP VIEW 0.100 BSC 0.210 MAX SIDE VIEW 0.325 0.310 0.300 0.195 0.130 0.115 0.015 MIN 0.150 0.130 0.115 0.022 0.018 0.015 0.070 0.045 0.060 0.039 0.055 0.030 0.015 GAUGE PLANE END VIEW SEATING PLANE 0.021 0.016 0.011 0.012 0.010 0.008 0.430 MAX 03-07-2014-D 16 COMPLIANT TO JEDEC STANDARDS MS-001-BB Figure 11. 16-Lead Plastic Dual In-Line Package [PDIP] Narrow Body (N-16) Dimensions shown in inches 10.00 (0.3937) 9.80 (0.3858) 4.00 (0.1575) 3.80 (0.1496) 9 16 1 8 1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0039) COPLANARITY 0.10 0.51 (0.0201) 0.31 (0.0122) 6.20 (0.2441) 5.80 (0.2283) 1.75 (0.0689) 1.35 (0.0531) SEATING PLANE 0.50 (0.0197) 0.25 (0.0098) 45 8 0 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.0157) Figure 12. 16-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-16) Dimensions shown in millimeters and (inches) Rev. B | Page 9 of 10 060606-A COMPLIANT TO JEDEC STANDARDS MS-012-AC CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. ADM202 Data Sheet 10.50 (0.4134) 10.10 (0.3976) 9 16 7.60 (0.2992) 7.40 (0.2913) 8 1.27 (0.0500) BSC 0.30 (0.0118) 0.10 (0.0039) COPLANARITY 0.10 0.51 (0.0201) 0.31 (0.0122) 10.65 (0.4193) 10.00 (0.3937) 0.75 (0.0295) 45 0.25 (0.0098) 2.65 (0.1043) 2.35 (0.0925) SEATING PLANE 8 0 0.33 (0.0130) 0.20 (0.0079) 1.27 (0.0500) 0.40 (0.0157) COMPLIANT TO JEDEC STANDARDS MS-013-AA CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. 03-27-2007-B 1 Figure 13. 16-Lead Standard Small Outline Package [SOIC_W] Wide Body (RW-16) Dimensions shown in millimeters and (inches) ORDERING GUIDE Model1 ADM202JNZ ADM202JRN ADM202JRN-REEL ADM202JRN-REEL7 ADM202JRNZ ADM202JRNZ-REEL ADM202JRNZ-REEL7 ADM202JRWZ ADM202JRWZ-REEL 1 Temperature Range 0C to 70C 0C to 70C 0C to 70C 0C to 70C 0C to 70C 0C to 70C 0C to 70C 0C to 70C 0C to 70C Package Description 16-Lead Plastic Dual In-Line Package [PDIP] 16-Lead Standard Small Outline Package [SOIC_N] 16-Lead Standard Small Outline Package [SOIC_N] 16-Lead Standard Small Outline Package [SOIC_N] 16-Lead Standard Small Outline Package [SOIC_N] 16-Lead Standard Small Outline Package [SOIC_N] 16-Lead Standard Small Outline Package [SOIC_N] 16-Lead Standard Small Outline Package [SOIC_W] 16-Lead Standard Small Outline Package [SOIC_W] Z = RoHS Compliant Part. (c)2016 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D00065-0-8/16(B) Rev. B | Page 10 of 10 Package Option N-16 R-16 R-16 R-16 R-16 R-16 R-16 RW-16 RW-16