Part Number: ADM3101EACPZ

Manufacturer: Analog Devices

Description: RS-232 Interface IC 3.3V 1 Driver 1 Receiver Tranceiver 15kV

Shipped from: Shenzhen/HK Warehouse

Stock Available: Check with us

Technical Specifications of ADM3101EACPZ-250R7

Datasheet  ADM3101EACPZ-250R7 datasheet
Category Integrated Circuits (ICs)
Family Interface – Drivers, Receivers, Transceivers
Manufacturer Analog Devices Inc.
Packaging Tape & Reel (TR)
Part Status Active
Type Transceiver
Protocol RS232
Number of Drivers/Receivers 1/1
Duplex Full
Receiver Hysteresis 400mV
Data Rate 460Kbps
Voltage – Supply 3 V ~ 5.5 V
Operating Temperature -40°C ~ 85°C
Mounting Type Surface Mount
Package / Case 12-WFQFN Exposed Pad, CSP
Supplier Device Package 12-LFCSP (3×3)

ADM3101EACPZ Description

The ADM3101E is a high-speed, one-channel, RS-232/ ITU-T V.28 transceiver interface device that runs off a single 3.3 V power source. It features ITU-T V.28 and RS-232 compatibility. Because of its low power consumption, it is ideally suited for use in portable equipment powered by batteries. The ADM3101E can achieve data transfer rates of up to 460 kbps while compliant with the EIA/TIA-232E and ITU-T V.28 requirements. There is protection against electrostatic discharges on all RS-232 (TOUT and RIN) and CMOS (TIN and ROUT) inputs and outputs (up to 15 kV ESD protection).

Because the input and output pins of the ADM3101E are protected against ESD up to 15 kV, this device is perfectly suited for usage in environments that are either electrically demanding or in which RS-232 cables are regularly plugged into and disconnected from their sockets. It is possible to run the voltage doubler/inverter off a single 3.3 V supply thanks to the utilization of four charge pump capacitors with an external capacitance of 0.1 uF each. The temperature range for the ADM3101E, which is stated from 40 degrees Celsius to +85 degrees Celsius, is supported by both the 12-lead LFCSP and the 16-lead QSOP packages.

Product Technical Specifications

EU RoHS Compliant
Part Status Active
HTS 8542.39.00.01
Automotive No
Function Line Transceiver
Data Rate 460Kbps(Min)
Transmitter Communication Type RS-232
Receiver Communication Type RS-232
Interface Standards EIA-232-E|RS-232|V.28
Data Transmission Topology Point-to-Point
Number of Transceivers 1
Number of Transmitters 1
Number of Receivers 1
Transmitter Signal Type Single-Ended
Receiver Signal Type Single-Ended
Number of Drivers per Line 1
Number of Receivers per Line 1
Number of Transmitter Enables 0
Number of Receivers Enables 0
Minimum Operating Temperature (°C) -40
Maximum Operating Temperature (°C) 85
Power Supply Type Single
Minimum Single Supply Voltage (V) 3
Typical Single Supply Voltage (V) 3.3
Maximum Single Supply Voltage (V) 5.5
Maximum Supply Current (mA) 5
Supplier Temperature Grade Industrial
Packaging Tape and Reel
Mounting Surface Mount
Package Height 0.73
Package Width 3
Package Length 3
PCB changed 12
Standard Package Name CSP
Supplier Package LFCSP EP
Pin Count 12
Lead Shape No Lead

Theory Of Operation

The ADM3101E is a driver and receiver for a single RS-232 line on a single channel. RS-232 levels can be created from a single 3.3 V supply using step-up voltage converters and level-shifting transmitters and receivers. The CMOS technology is utilized to ensure that the power dissipation is kept to an absolute minimum, which enables portable applications to get the most out of their batteries.

Charge Pump Voltage Converter The charge pump voltage converter comprises a switching matrix and an oscillator that operates at 200 kHz. From an input level of 3.3 V, the converter produces a supply with a negative value of 6.6 V when it is not loaded. This is accomplished by using a switched capacitor approach, which can be seen in both Figure 13 and Figure 14 of the attached figures. The initial step involves increasing the 3.3 V input supply voltage to +6.6 V, utilizing C1 as the charge storage element.

After that, the level of +6.6 V is inverted, so a negative value of 6.6 V can be generated by employing C2 as the storage element. Although it is depicted as connected between V+ and VCC, the effectiveness of C3 is not affected if it is instead connected between V+ and GND. To dampen the output ripple, capacitors C3 and C4 are connected in parallel. The values are not essential; you can raise them if you choose. In place of the capacitors C1, C2, C3, and C4, you may instead use larger capacitors with a capacity of up to 10 microfarads.

3.3 V Logic to EIA/TIA-232E

Transmitter The levels of the 3.3 V logic input are converted into the levels of the RS-232 output by the transmitter driver. The output voltage swing is normally within a range of 6 V when driving an RS-232 load with VCC equal to 3.3 V. Internally, the TIN pin has a weak pull-up that permits it to be caused by an open-drain output; nevertheless, when an open-drain pin drives the TIN pin, the maximum operating data rate is lowered.

EIA/TIA-232E to 3.3 V Logic Receivers

The RS-232 input level is accepted by the receiver, which is an inverting level shifter. This level shifter translates the RS-232 input into a 3.3 V logic output level. The information is protected from overvoltages of up to -30 V and contains an inbuilt pull-down resistor with a value of 5 k that connects to the ground. The internal pull-down resistor of 5 k pulls an unconnected input down to 0 V, resulting in a Logic 1 output level for either an unconnected input or an input linked to GND. This is true whether the information is connected to GND or not. The receiver has a Schmitt trigger input with a hysteresis threshold of 0.4 V; this allows for error-free reception regardless of whether the input signal is noisy or has a slow transition rate.

CMOS Input Voltage Thresholds

When VCC is set to 3.3 volts, the CMOS input and output pins of the ADM3101E, also known as TIN and ROUT, are intended to interact with logic thresholds of 1.8 volts.

When VCC is set to 5 V, the CMOS input and output pins of the ADM3101E, referred to as TIN and ROUT, are also intended to connect with TTL/CMOS logic thresholds.

Protection against Electrostatic Discharge on the RS-232 and CMOS I/O Pins

Protected from electrostatic discharges of up to 15 kV are the RS-232 (TOUT and RIN) and CMOS (TIN and ROUT) inputs and outputs.

High Baud Rate

The ADM3101E boasts high slew rates, making it possible for data to be transmitted at significantly faster rates than those specified by the EIA and RS-232. When a push-pull output drives TIN, the RS-232 voltage levels can remain stable at data speeds of up to 460 kbps, even when subjected to the most demanding loading conditions. To reduce EMI interference as much as possible, the slew rate is kept to less than 30 V/s by internal control.


Contact ICRFQ, your one-stop shop for electronic sourcing components in China, if you require further information or like to place an order for the ADM3101EACPZ. We will work hard to ensure you get the best possible products at affordable prices.

4.8/5 - (397 votes)
Kevin Chen