Overview
The ADM3202ANZ, produced by Analog Devices Inc., is a high-speed, 2-channel RS-232/V.28 interface device. It operates from a single 3.3 V power supply, making it ideal for battery-powered portable instruments due to its low power consumption and shutdown facility. This device is part of the ADM3202/ADM3222/ADM1385 family, which is designed to meet EIA-232E and CCITT V.28 specifications. It features a charge pump voltage converter that generates the necessary ±6.6 V supply from the 3.3 V input, enabling RS-232 signal levels without the need for external voltage sources.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Voltage Range | 3.0 | 3.3 | 5.5 | V | VCC |
| Power Supply Current | 1.3 | 3 | 12 | mA | No load, RL = 3 kΩ to GND |
| Shutdown Supply Current | 0.01 | 0.5 | μA | ||
| Logic Input Threshold Low, VINL | 0.8 | V | |||
| Logic Input Threshold High, VINH | 2.0 | V | |||
| CMOS Output Voltage Low, VOL | 0.4 | V | IOUT = 1.6 mA | ||
| CMOS Output Voltage High, VOH | V | IOUT = -1.6 mA | |||
| Data Rate | 460 | kbps | |||
| ESD Protection | ±8 kV (contact), ±15 kV (air gap) | IEC 1000-4-2 (801.2) on RS-232 pins (ADM3202 only) | |||
| Package Type | 16-Lead PDIP | ||||
| Operating Temperature Range | -40 | 85 | °C |
Key Features
- High-speed data transmission up to 460 kbps, meeting EIA-232E and CCITT V.28 specifications.
- Operation from a single 3.3 V power supply with low power consumption and shutdown facility, ideal for battery-powered devices.
- Four external 0.1 μF charge pump capacitors for voltage doubler/inverter, allowing RS-232 signal levels from a 3.3 V supply.
- ESD protection to IEC 1000-4-2 (801.2) on RS-232 pins (ADM3202 only), with ±8 kV contact discharge and ±15 kV air gap discharge.
- Available in PDIP, SOIC_N, SOIC_W, SSOP, and TSSOP packages.
- Receiver enable and shutdown circuitry (ADM3222 and ADM1385) for power management.
- Internal 5 kΩ pull-down resistors on RS-232 inputs and Schmitt-trigger inputs for reliable signal reception.
Applications
- General-purpose RS-232 data links.
- Portable instruments, such as palmtop computers and PDAs.
- Printers and other battery-powered devices requiring low power consumption.
Q & A
- What is the operating voltage range of the ADM3202ANZ?
The operating voltage range is 3.0 V to 5.5 V, with a typical value of 3.3 V. - What is the maximum data rate supported by the ADM3202ANZ?
The maximum data rate supported is up to 460 kbps. - What type of ESD protection does the ADM3202ANZ offer?
The ADM3202ANZ offers ESD protection to IEC 1000-4-2 (801.2) on RS-232 pins, with ±8 kV contact discharge and ±15 kV air gap discharge. - In what packages is the ADM3202ANZ available?
The ADM3202ANZ is available in PDIP, SOIC_N, SOIC_W, SSOP, and TSSOP packages. - How does the charge pump voltage converter work in the ADM3202ANZ?
The charge pump voltage converter generates a ±6.6 V supply from the 3.3 V input using four external 0.1 μF charge pump capacitors. - What are the key applications of the ADM3202ANZ?
The key applications include general-purpose RS-232 data links, portable instruments, and printers. - Does the ADM3202ANZ have any power-saving features?
Yes, it has a shutdown facility that reduces the quiescent current to less than 0.5 μA. - What is the operating temperature range of the ADM3202ANZ?
The operating temperature range is -40°C to +85°C. - How are the receiver inputs protected in the ADM3202ANZ?
The receiver inputs are protected against overvoltages up to ±30 V and have internal 5 kΩ pull-down resistors to ground. - What is the significance of the Schmitt-trigger inputs in the ADM3202ANZ?
The Schmitt-trigger inputs ensure error-free reception for both noisy inputs and inputs with slow transition times, with a hysteresis level of 0.4 V.
