Figure 1 illustrates the simplified block diagram of a typical high-speed data converter system. The system consists of a bandpass filter, ADC, high-frequency clock, high-speed storage device, and post processing unit. Aside from the MAX104, the high-frequency clock plays a significant role in determining the accuracy of a high-speed data converter. This high frequency, low-phase-noise clock is a combination of a high frequency...
The design in Figure 1 is a visible optical link for those who need to see the transmitted data. An isolation figure of more than 5000V is a bonus. Tests of the system used the COM input of a data-acquisition system, as well as a standard PC`s COM port. The MC1489 converts the RS-232C data to TTL signals. A 7404 gate then inverts the signal. The output of the 7404 drives Q1, a 2N3055 power transistor.
The method in Figure 1a needs no access or knowledge of the communicating devices. A C program opens two COM ports and installs interrupt-service routines for IRQ4 and IRQ3. Upon the reception of an interrupt, the routine stores a byte in a common circular buffer with the COM identifier and error flags. The main program displays the contents of the buffer, indicating time intervals in milliseconds between consecutive transfers. Although the...
The rapid, widespread use of 3.3V logic circuits complicates
the selection of RS232 interface circuits. The optimum choice
of an interface circuit should be based upon several application
1) Logic circuitry connected to interface chip
2) Power supply voltages available
3) Power consumption constraints
4) Serial interface environment
5) Mouse driving requirements
The RS232 transceiver supports both RS232 and EIA-562
standards, whereas the RS485 transceiver supports both
RS485 and RS422 standards. The logic input (MODE) selects
between RS232 and RS485 modes. With three additional
control logic inputs (RXEN, DXEN and ON), the
LTC1387 adapts easily, as shown in Table 1, to various communications
needs, including a one-signal-line RS232
While the normal PC hardware might well run with just Tx, Rx and Ground connected, most driver software will wait forever for one of the handshaking lines to go to the correct level. Depending on the signal state it might sometimes work, other times it might not. The reliable solution is to loop back the handshake lines if they are not used.
A state-of-the-art silicon temperature sensor like MAX6577 measures a remote temperature far from
the host system. The temperature sensor converts this temperature into a square wave with a
frequency proportional to the absolute temperature of its package, while drawing little supply current
from the power source. The amplitude of the output signal is equal to the power supply of the chip,
and must be sent over a cable to the host system....
PBUS is an RS485-like multi-drop bus for interconnecting PIC and other microcontroller-driven devices. Protocol and software is written by Jap. Just include a separate pbus library file into your project and add your command handlers for the specific device in a few lines.
Hand held computers are rapidly moving to 3V logic to save
power. Yet higher voltage buses are still utilized elsewhere in
the system for display driving and other functions. The
LT1330 is functionally equivalent to the LT1237 but operates
from 5V with a separate logic supply to interface directly with
Medical and industrial applications often require galvanic isolation of 2500 V ac or higher for the safety of patients and equipment operators. The isolation barrier conveys not only power to the sensing element, but also data to or from that element. Each data signal crossing the barrier-requires isolation. Consequently, designers can typically s
The TS4962 is a differential class-D BTL power Amplifier It is able to drive up to 2. 2W into a 4, load and 1. 4W into a 8, load at 5V. It achieves outstanding efficiency (88% typ. ) compared to standard AB-class Audio amps. By STMicroelectronics
The HS-3182 is a monolithic dielectrically isolated bipolar differential line driver designed to meet the specifications of ARINC 429. This Device is intended to be used with a companion chip, HS-3282 CMOS ARINC Bus Interface Circuit, which provides the data formatting and processor interface function. All logic inputs are TTL and CMOS compatible.
Overview: The MAX34446 data logger for power supplies can monitor voltages for overvoltage and undervoltage, as well as for overcurrent conditions and overtemperature conditions. The device constantly checks for userprogrammable thresholds; when th..