ADM1181 Analog Devices, ADM1181 Datasheet
ADM1181
Available stocks
Related parts for ADM1181
ADM1181 Summary of contents
Page 1
... General Purpose RS-232 Data Link Portable Instruments PDAs GENERAL DESCRIPTION The ADM202E and ADM1181A are robust, high speed, 2- channel RS232/V.28 interface devices that operate from a single +5 V power supply. Both products are suitable for operation in harsh electrical environments and are compliant with the EU di- rective on EMC (89/336/EEC) ...
Page 2
... ADM202E/ADM1181A–SPECIFICATIONS Parameter DC CHARACTERISTICS Operating Voltage Range V Power Supply Current CC LOGIC Input Logic Threshold Low, V INL Input Logic Threshold High, V INH CMOS Output Voltage Low CMOS Output Voltage High Input Leakage Current RS-232 RECEIVER EIA-232 Input Voltage Range EIA-232 Input Threshold Low ...
Page 3
... C2– INVERTER 10V OUT OUT ADM1181A GND 15 NOTE * INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT ADM1181A Typical Operating Circuit C5 0.1µF C3 10V 0.1µF 10V OUT EIA/TIA-232 OUTPUTS OUT IN EIA/TIA-232 * INPUTS IN ...
Page 4
... F) can be used for capacitors C1–C4. This facili- tates direct substitution with older generation charge pump RS-232 transceivers GND INTERNAL OSCILLATOR NOTE: C3 CONNECTS BETWEEN V+ AND GND ON THE ADM1181A Figure 1. Charge Pump Voltage Doubler S1 V+ FROM VOLTAGE C2 DOUBLER S2 GND INTERNAL OSCILLATOR Figure 2. Charge Pump Voltage Inverter ...
Page 5
... HIGH BAUD RATE The ADM202E/ADM1181A feature high slew rates permitting data transmission at rates well in excess of the EIA/RS-232-E specifications. RS-232 voltage levels are maintained at data rates up to 230 kb/s even under worst case loading conditions. This allows for high speed data links between two terminals or indeed ...
Page 6
... ADM202E/ADM1181A Typical Performance Curves –2 –4 –6 –8 0 500 1000 1500 C – Figure 6. Transmitter Output Voltage High/Low vs. Load Capacitance @ 230 kbps 3.5 4 4.5 V – Figure 7. Transmitter Output Voltage High vs + ...
Page 7
... TO 1ns Figure 14. IEC1000-4-2 ESD Current Waveform The ADM202E/ADM1181E products are tested using both the above mentioned test methods. All pins are tested with respect to all other pins as per the MIL-STD-883B specification. In ad- dition all I/O pins are tested as per the IEC test specification. ...
Page 8
... Degradation or loss of function that is not recoverable due to damage. The ADM202E/ADM1181A have been tested under worst case conditions using unshielded cables and meet Classification 2. Data transmission during the transient condition is corrupted, but it may be resumed immediately following the EFT event t without user intervention ...
Page 9
... Degradation or loss of function that is not recoverable due to damage. The ADM202E/ADM1181A products easily meet Classification 1 at the most stringent (Level 3) requirement. In fact field strengths V/m showed no performance degradation, and error-free data transmission continued even during irradia- tion ...
Page 10
... ADM202E/ADM1181A RADIATED EMISSIONS Radiated emissions are measured at frequencies in excess of 30 MHz. RS-232 outputs designed for operation at high baud rates while driving cables can radiate high frequency EM energy. The reasons already discussed that cause conducted emissions can also be responsible for radiated emissions. Fast RS-232 out- put transitions can radiate interference, especially when lightly loaded and driving unshielded cables ...
Page 11
... SEATING (0.65) PLANE BSC 16 1 0.0196 (0.50) 0.210 (5.33 0.0099 (0.25) MAX 0.160 (4.06) 0.115 (2.93) 8 0.022 (0.558) 0 0.0500 (1.27) 0.014 (0.356) 0.0160 (0.41) –11– ADM202E/ADM1181A TSSOP Package (RU-16) 0.201 (5.10) 0.193 (4.90 PIN 1 0.0433 (1.10) MAX 0.028 (0.70) 8 0.0118 (0.30) 0 0.020 (0.50) 0.0079 (0.20) 0.0075 (0.19) 0.0035 (0.090) DIP Package (N-16) 0.840 (21.33) 0.745 (18.93 ...
Page 12
–12– ...