Signal Control
Analog switches and multiplexers are used to steer and route signals within systems for input selection, gain control, and even filter control. These devices are chosen for low-noise and distortion for audio requirements or extremely high speed for RF applications. The newer cross-point switches are used to match up an input source signal, such as a video feed, with a given output channel that may represent a customer. Digital level translation switches are used to match up logic systems running on different power supplies and also to route the signals
Application Notes
- AN-927 : Determining if a Spur is Related to the DDS/DAC or to Some Other Source (For Example, Switching Supplies)
- AN-873 : Lock Detect on the ADF4xxx Family of PLL Synthesizers
- AN-793 : ESD/Latch-Up Considerations with iCoupler® Isolation Products
- AN-782 : Monitoring High Voltages with the ADM1062-ADM1069 Super Sequencers™
- AN-781 : Monitoring Additional Supplies with the ADM1062-ADM1069 Super Sequencers™
- AN-780 : 0: Monitoring Negative Voltages with the ADM1062-ADM1069 Super Sequencers™
- AN-755 : EEPROM Checksum Information for the ADM1060
- AN-740 : iCoupler® Isolation in RS-232 Applications
- AN-728 : Evaluation Kit for the AD5253 64-Position I2C-Compatible Nonvolatile Memory Digital Potentiometer
- AN-727 : iCoupler® Isolation in RS-485 Applications
- AN-726 : Triple-Supply Power-Good Indication with the ADM108x
- AN-723 : Interrupt Generation Using the ADM106x
- AN-722 : Watchdog Detection Using the ADM106x
- AN-712 : AD5228 Evaluation Kit for the 32-Position, Push Button, Up/Down Control Digital Potentiometer
- AN-711 : AD5227 Evaluation Kit for the 64-Position, Up/Down Control Digital Potentiometer
- AN-698 : Configuration Registers of ADM1062/ADM1063/ADM1064/ADM1065/ADM1066/ADM1067 (Rev. A, 2/07)
- AN-695 : Using the ADN8831 TEC Controller Evaluation Board (Rev. B, 9/2007)
- AN-694 : Hot Swap and Blocking FET Control Using 2 x ADM1073 Hot Swap Controllers
- AN-686 : Implementing an I2C® Reset
- AN-667 : Up/Down Sequence of Supplies Using the ADM1060
- AN-649 : Using the Analog Devices Active Filter Design Tool
- AN-591 : ADM1070 Hot Swap Controller
This App Note Describes Operation of the ADM1070 Under Various Hot Swap Insertion and Removal Conditions. - AN-584 : Using the AD813X Differential Amplifier
The AD813x differs from conventional op amps by the external presence of an additional input and output. The additional input, VOGM, controls the output common mode voltage. - AN-582 : Resolution Enhancements of Digital Potentiometers with Multiple Devices
Digital Potentiometers Can Be Paralleled, Stacked or Cascaded to Optimize Resolution. - AN-579 : Versatile Programmable Amplifiers Using Digital Potentiometers with Nonvolatile Memory
- AN-541 : Proper System Grounding Techniques for 6B Series Systems
- AN-536 : Dimensional Gaging Measurements with Model 3B17
- AN-535 : Digital Input/Output Subsystems
- AN-533 : Applying 5B Series Backplanes and Mounting Cards
- AN-532 : Applying Model 5B38 with 120 ohm Bridges
- AN-531 : 5B37 Transfer Function Calculating the Output Voltage of a 5B37 Signal Conditioner
- AN-530 : 0: Narrow or Wide Bandwidth 5B Series Input Modules: Which is the Right Choice?
- AN-529 : 5B Series Signal Conditioning Subsystems in RFI/EMI Fields
- AN-528 : Design Considerations for Designing a 5B Series System
- AN-417 : Fast Rail-to-Rail Operational Amplifiers Ease Design Constraints in Low Voltage High Speed Systems
Movement towards lower power supply voltages is driven by the demand that systems consume less and less power coupled with the desire to reduce the number of power supply voltages in the system. The following applications are discussed: Single-Ended and Differential Input ADC Input Circuits, Video Line Driver, Active Filter, HDSL Transceiver, and Transformer Drive Circuits. - AN-402 : 02: Replacing Output Clamping Op Amps with Input Clamping Amps
So far most clamping amplifiers have relied upon an output clamping architecture and are called output clamp amps (OCAs). A new architecture called an input clamp amp (ICA) offers superior clamping accuracy and lower distortion. - AN-369 : Thermocouple Signal Conditioning Using the AD594/AD595
This application note reviews thermocouple basics and illustrates circuit designs for thermocouple signal conditioning using the AD594/AD595. - AN-359 : Settling Time of Operational Amplifiers
- AN-358 : Noise and Operational Amplifier Circuits
- AN-357 : Operational Integrators
- AN-356 : User's Guide to Applying and Measuring Operational Amplifier Specifications
- AN-3 : AB-3: Digital Nulling of Precision Op Amps
- AN-274 : Taking the Uncertainty Out of Thermocouple Temperature Measurement (With the AD594/AD595)
- AN-257 : Careful Design Tames High Speed Op Amps
- AN-256 : Accurately Testing Op Amp Settling Times
- AN-253 : Find Op Amp Noise with Spreadsheet
- AN-216 : Video VCAs and Keyers Using the AD834 and AD811
- AN-138 : SPICE-Compatible Op Amp Macro-Models
- AN-117 : OP-42 Advanced SPICE Macro-Model
- AN-113 : AB-113: Precision Ramp Generator
- AN-112 : AB-112: Single Resistor Controls Wien Bridge Oscillator Frequency
Frequency control can be added to the conventional Wien Bridge Circuit by adding an op amp inverter. - AN-111 : AB-111: Single-Supply Wien Bridge Oscillator
Wien Bridge Oscillators require only one op amp, important in battery-operation. This circuit operates from a single 9V battery. - AN-109 : AB-109: High Speed Precision Rectifier
The low offsets and excellent load driving capability of the OP-27 are key advantages in this precision rectifier circuit. - AN-108 : 08: JFET-Input Amps are Unrivaled for Speed and Accuracy
- AN-106 : 06: A Collection of Amp Applications
Examines Some of the Numerous and Widely Used Applications of the Operational Amplifier
Evaluation Boards/Tools
- ADG2188 Evaluation Tools (EVAL-ADG2188EB)
Evaluation Board for I2C® CMOS 8 x 8 Analog Switch Array with Dual/Single Supplies - ADG2108 Evaluation Tools (EVAL-ADG2108EB)
Evaluation Board for I2C® CMOS 8 x 10 Analog Switch Array with Dual/Single Supplies - ADCMP551/ADCMP552/ADCMP561/ADCMP562/ADCMP563/ADCMP564 Evaluation Tools
Technical Articles
- Design Circuits with Digitally Controllable Variable Resistors
by Walt Heinzer, Analog Devices, Inc.
(Analog Dialogue, Vol 29, No 1, 1995) - Rotary Encoder Mates with Digital Potentiometer
... In developing electronic systems, designers look for products or ideas that may benefit from the better performance, smaller size, lower cost, and improved reliability that an IC can offer. (Design Idea, EDN, 3/6/2003) - Auto-Zero Amplifiers
A wide variety of electronic applications, especially those involving very small input signals, require signal paths with very low offset voltage and offset voltage drift over time and temperature. - Simple circuit provides precision ADC interface
(EDN, 08/21/03) - Circuit Measures True-rms and Average Value
(EDN, Design Ideas, 9/26/2002) - Choosing an A/D Converter for Motor Control Apps
Designers must solve challenges associated with current and voltage monitoring, optical encoder feedback, and resolver-to-digital conversion (Electronic Products, 5/2004) - DDS Device Provides Amplitude Modulation
by Mary McCarthy, Analog Devices, Inc.
(EDN, September 2, 1999) - Circuit Provides ISFET-Sensor Bias
by Brian Harrington, Analog Devices, Inc. (EDN Design Idea, 6/10/2004) - Analog Devices AD7725 16-Bit Delta-Sigma ADC
... Analog Devices' New 16-Bit Sigma Delta ADC Features On-Chip Programmable Post Processor -- Post processor runs 130 million multiply-accumulate operations per second to free up external processing requirements. (ChipCenter Product Review, Product of the Week) - Precision Programmable Current Sources Use Digital Pots
by Peter Khairolomour, Gary Leung, Alan Li, Analog Devices, Inc. (Design Brief, EDN, 3/31/2005) - Demystifying Auto-Zero Amplifiers Part 2
by Eric Nolan and Reza Moghimi (Analog Dialogue, May 2000) - Single IC provides gains of 10 and –10
by Moshe Gerstenhaber and Charles Kitchin, Analog Devices, Inc. (EDN, 8/7/2003) - Protecting Instrumentation Amplifiers
... All data acquisition board designs have to contend with ESD, EMI, and overvoltages. Can one solution protect the circuitry against all three hazards?
(First published in the April 2000 issue of Sensors Magazine) - Measurement and Control of RF Power
by Eamon Nash, Analog Devices, Inc.
- High-Voltage Monitor Features High Accuracy
... Article is on page 3 of PDF.
(Electronic Design, Ideas for Design, 8/19/2002) - Digital Potentiometers Vary Amplitude In DDS Devices
(Electronic Design, Ideas for Design, 5/29/2000) - Isolation in Medical Applications
by Rich Ghiorse and Steve Ranta, Analog Devices, Inc. (Power Electronics-Europe, 7/2005)