GENERAL DESCRIPTION
The ADF4350 allows implementation of fractional-N or integer-N phase-locked loop (PLL) frequency synthesizers if used with an external loop filter and external reference frequency.
The ADF4350 has an integrated voltage controlled oscillator (VCO) with a fundamental output frequency ranging from 2200 MHz to 4400 MHz. In addition, divide-by-1/2/4/8 or 16 circuits allow the user to generate RF output frequencies as low as 137.5 MHz. For applications that require isolation, the RF output stage can be muted. The mute function is both pin- and software-controllable. An auxiliary RF output is also available, which can be powered down if not in use.
Control of all the on-chip registers is through a simple 3-wire interface. The device operates with a power supply ranging from 3.0 V to 3.6 V and can be powered down when not in use.

FEATURES
*Output frequency range: 137.5 MHz to 4400 MHz
*Fractional-N synthesizer and integer-N synthesizer
*Low phase noise VCO
*Programmable divide-by-1/-2/-4/-8/-16 output
*Typical rms jitter: 0.5 ps rms
*Power supply: 3.0 V to 3.6 V
*Logic compatibility: 1.8 V
*Programmable dual-modulus prescaler of 4/5 or 8/9
*Programmable output power level
*RF output mute function
*3-wire serial interface
*Analog and digital lock detect
*Switched bandwidth fast-lock mode
*Cycle slip reduction

APPLICATIONS
*Wireless infrastructure (W-CDMA, TD-SCDMA, WiMAX, GSM, PCS, DCS, DECT)
*Test equipment
*Wireless LANs, CATV equipment
*Clock generation

ADF4350BCPZ, ADF4350BCPZ-RL, ADF4350BCPZ-RL7, EVAL-ADF4350EB1Z  

ADF4350 - Wideband Synthesizer with Integrated VCO

GENERAL DESCRIPTION
The ADM1184 is an integrated, 4-channel voltage-monitoring device. A 2.7 V to 5.5 V power supply is required on the VCC pin to power the device.
Four precision comparators monitor four voltage rails. Each comparator has a 0.6 V reference with a worst-case accuracy of 0.8%. Resistor networks that are external to the VIN1, VIN2, VIN3, and VIN4 pins set the trip points for the monitored supply rails.
The ADM1184 has four open-drain outputs. OUT1 to OUT3 can be used to enable power supplies, and PWRGD is a common power-good output.
OUT1 to OUT3 are dependent on their associated VINx input (that is, VIN1, VIN2, or VIN3). If a supply monitored by VINx drops below its programmed threshold, the associated OUTx pin and PWRGD are disabled.
PWRGD is a common power-good output indicating the status of all monitored supplies. There is an internal 190 ms (typical) delay associated with the assertion of the PWRGD output. If VIN1, VIN2, VIN3, or VIN4 drops below its programmed threshold, PWRGD is deasserted immediately.
The ADM1184 is available in a 10-lead mini small outline package (MSOP).

FEATURES
*Powered from 2.7 V to 5.5 V on the VCC pin
*Monitors 4 supplies via 0.8% accurate comparators
*4 inputs can be programmed to monitor different voltage levels with external resistor dividers
*3 open-drain enable outputs (OUT1, OUT2, and OUT3)
*Open-drain power-good output (PWRGD)
*Internal 190 ms delay associated with assertion of PWRGD
*10-lead MSOP

APPLICATIONS
*Monitor and alarm functions
*Telecommunications
*Microprocessor systems
*PC/servers

ADM1184ARMZ, ADM1184ARMZ-REEL7  

ADM1184 - 0.8% Accurate Quad Voltage Monitor

GENERAL DESCRIPTION
The AD7804/AD7808 are quad/octal 10-bit digital-to-analog converters, with serial load capabilities, while the AD7805/AD7809 are quad/octal 10-bit digital-to-analog converters with parallel load capabilities.
These parts operate from a +3.3 V to +5 V (±10%) power supply and incorporates an on-chip reference.
These DACs provide output signals in the form of VBIAS ± VSWING.
VSWING is derived internally from VBIAS. On-chip control registers include a system control register and channel control registers.
The system control register has control over all DACs in the package.
The channel control registers allow individual control of DACs.
The complete transfer function of each individual DAC can be shifted around the VBIAS point using an on-chip Sub DAC.
All DACs contain double buffered data inputs, which allow all analog outputs to be simultaneously updated using the asynchronous LDAC input.

FEATURES
Four 10-Bit DACs in One Package
Serial and Parallel Loading Facilities Available
AD7804 Quad 10-Bit Serial Loading
AD7805 Quad 10-Bit Parallel Loading
AD7808 Octal 10-Bit Serial Loading
AD7809 Octal 10-Bit Parallel Loading
+3.3 V to +5 V Operation
Power-Down Mode
Power-On Reset
Standby Mode (All DACs/Individual DACs)
Low Power All CMOS Construction
10-Bit Resolution
Double Buffered DAC Registers
Dual External Reference Capability
APPLICATIONS
Optical Disk Drives
Instrumentation and Communication Systems
Process Control and Voltage Setpoint Control
Trim Potentiometer Replacement
Automatic Calibration

AD7804BN
AD7804BR
 

AD7804-+3.3 V to +5 V Quad/Octal 10-Bit DACs

GENERAL DESCRIPTION
The ADM3251E is a high speed, single-channel RS-232 transceiver device that operates from a single power supply.
This device is ideally suited to operation in electrically harsh environments or where RS-232 cables are frequently being plugged/unplugged.
The ADM3251E incorporates dual-channel digital isolators with isoPower integrated, isolated power.
There is no requirement for a separate isolated dc-to-dc converter as the ADM3251E has
a chip-scale dc-to-dc converter which is based on Analog Devices, Inc. iCoupler® technology.
Analog Devices’ chip-scale transformer iCoupler technology is used both for the isolation of the logic signals as well as for the dc-to-dc converter.
The result is a small form factor, total isolation solution.
Five external 0.1μF charge pump capacitors are used for the voltage doubler/inverter permitting operation from a single supply.
The ADM3251E conforms to the EIA-232E specifications and operates at data rates up to 460 kbps.
The device is ideally suited to operation in electrically harsh environments.
RS-232 pins, RIN and TOUT are protected against electrostatic discharges (up to ±15 kV ESD protection).
The ADM3251E is available in a 20 lead Wide Body SOIC package.

FEATURES
* 460 kbps Data Rate
* 1 Tx and 1 Rx
* Meets EIA-232E specifications
* 0.1uF charge pump capacitors
* Integrated isolated dc-to-dc converter
* ESD protection to IEC1000-4-2(801.2) on RIN and TOUT pins.
* ±8kV: contact discharge
* ±15kV: air gap discharge
* Integrated isolated dc-to-dc converter
* High common-mode transient immunity: >25kV/us
* Safety and regulatory approvals (pending)
* UL recognition
* VDE certificate of conformity
* 20 Lead WSOIC package

APPLICATIONS
* High noise data communications
* Industrial Communications
* Industrial/Telecom Diagnostic Ports  

ADM3251E - Isolated Single Channel RS-232 Line Driver/Receiver

INTRODUCTION
 This Technical Note describes the evaluation board for the AD7719, Low Voltage, Low Power, 16&24- Bit, Dual Sigma Delta ADC.
The AD7719 is a complete analog front end for low frequency measurement applications.
The AD7719 is factory calibrated and therefore does not require field calibration.
The device can accept low level input signals directly from a transducer and produce a serial digital output.
It employs a sigma-delta conversion technique to realize up to 24 bits (Main ADC) or 16 bits (Auxiliary ADC) of no missing codes performance.
The selected input signal is applied to a proprietary programmable gain (Main ADC only) front end based around an analog modulator.
The modulator output is processed by an on-chip digital filter.
The first notch of this digital filter can be programmed via an on-chip control register allowing adjustment of the filter cutoff and output update rate.
Full data on the AD7719 is available in the AD7719 datasheet available from Analog Devices and should be consulted in conjunction with this Technical Note when using the evaluation board.
The evaluation board interfaces to the parallel port of an IBM compatible PC.
Software is available with the evalu- ation board which allows the user to easily program the AD7719.
Other components on the AD7719 Evaluation Board include two AD780s (precision 2.5V references), a 32.7680 kHz crystal and digital buffers to buffer signals to and from the PC.

FEATURES
Full-Featured Evaluation Board for the AD7719 On-Board Reference and Digital Buffers
Various Linking Options PC Software for Control of AD7719  

EVAL-AD7719-EB - Evaluation Board for the AD7719, 16&24-Bit, Dual Sigma Delta ADC