There are not a whole lot of analog-to-digital converter and digital-to-analog converter manufacturers "out there." Most of the major manufacturers are listed here.
AKM Semiconductor | 888-256-7364 | San Jose, CA
Provider of mixed-signal IC's for consumer, automotive, and communications applications.
Analog Devices | 800-262-5643 | Norwood, MA
Op amps, switches, A/D, D/A, S&H, AD8347 direct conversion RFIC (800 MHz to 2.7 GHz), ADIsimPLL synthesizer circuit simulation software.
Burr-Brown (now Texas Instruments) | 800-548-6132 | Tucson, AZ
IC solutions - Op amps, switches, A/D, D/A, S&H.
Cirrus Logic | 800-888-5016 | Austin, TX
Products include analog and mixed-signal audio ICs for consumer, professional and automotive entertainment applications, and high-precision analog and mixed-signal ICs for industrial applications, such as industrial measurement, analytical instruments, consumer utility, digital power meters and seismic systems.
CurrentRF | 209-914-2305 | Tracy, CA
Provides engineering consulting services to companies seeking to increase their knowledge in digital to analog converter design, through consulting and contract design.
Intersil Corp | 888-468-3774 | Milpitas, CA
Design and manufacture of high performance analog semiconductors.
Intronics Inc | 800-367-0004 | Norwood, MA
Manufacturer of DC/DC, AC/DC converters, custom power supplies , nalog Devices Legacy Products (isolation amplifiers, signal conditioners, function modules, & more), medical & industrial isolation amplifiers and CRT geometry correction ICs.
Linear Technology | 800-454-6327 | Milpitas, CA
Designs, manufactures and markets a broad line of standard high performance integrated circuits; principal product categories include amplifiers, battery management, data converters, high frequency, interface, voltage regulators and voltage references.
MaxLinear (formerly Exar Corp) | 800-366-9742 | Fremont, CA
IUARTs, DS3/E3, DS1/E1, Sonet/SDH, frequency multipliers, communication clock generators, analog Front Ends (AFE) for video and imaging applications, multi-protocol serial interface solutions.
Micro Networks (now API Technologies Corp.) | 508-852-5400 | Worcester, MA
Supplies high-performance, high-reliability data conversion products (amplifiers, A/D and D/A converters) and custom ASIC and MCM modules for weapons and flight control systems to prime contractors.
Murata Power Solutions | 800-233-2765 | Mansfield, MA
Manufacturer of dc-dc converters, ac-dc power, high-reliability power supplies, digital panel meters, magnetics, data acquisition devices.
ON Semiconductor (formerly Fairchild) | 800-341-0392 | South Portland, ME
Manufactures power management ICs, power semiconductors, signal path ICs, and optoectronics, logic, and lighting & display products.
Spectrum Microwave (now API Technologies Corp.)
spectrummicrowave.com/digital_analog_converters.asp | 508-251-6400 | Marlborough, MA
D/A and A/D Converters, high resolution 8-bit to 20-bit designs.