Part # AD7569 AD7669 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD7569/AD7669 LC2MOS Complete 8-Bit Analog I/O Systems

Part Details:

LC2MOS a Complete, 8-Bit Analog I/0 Systems AD7569/AD7669 FEATURES AD7569 FUNCTIONAL BLOCK DIAGRAM 2 s ADC with Track/Hold1 s DAC with Output Amplifier AD7569, Single DAC OutputAD7669, Dual DAC Output On-Chip Bandgap ReferenceFast Bus InterfaceSingle or Dual 5 V Supplies GENERAL DESCRIPTIONThe AD7569/AD7669 is a complete, 8-bit, analog I/O systemon a single monolithic chip. The AD7569 contains a high speedsuccessive approximation ADC with 2 µs conversion time, a track/ AD7669 FUNCTIONAL BLOCK DIAGRAM hold with 200 kHz bandwidth, a DAC and an output buffer ampli-fier with 1 µs settling time. A temperature-compensated 1.25 Vbandgap reference provides a precision reference voltage for theADC and the DAC. The AD7669 is similar, but contains twoDACs with output buffer amplifiers. A choice of analog input/output ranges is available. Using a sup-ply voltage of +5 V, input and output ranges of zero to 1.25 Vand zero to 2.5 volts may be programmed using the RANGE in-put pin. Using a ± 5 V supply, bipolar ranges of ± 1.25 V or ±2.5 V may be programmed.Digital interfacing is via an 8-bit I/O port and standard micro-processor control lines. Bus interface timing is extremely fast, al-lowing easy connection to all popular 8-bit microprocessors. Aseparate start convert line controls the track/hold and ADC togive precise control of the sampling period. PRODUCT HIGHLIGHTS The AD7569/AD7669 is fabricated in Linear-Compatible 1. Complete Analog I/O on a Single Chip. CMOS (LC2MOS), an advanced, mixed technology process The AD7569/AD7669 provides everything necessary to combining precision bipolar circuits with low power CMOS interface a microprocessor to the analog world. No external logic. The AD7569 is packaged in a 24-pin, 0.3" wide "skinny" components or user trims are required and the overall accu- DIP, a 24-terminal SOIC and 28-terminal PLCC and LCCC racy of the system is tightly specified, eliminating the need packages. The AD7669 is available in a 28-pin, 0.6" plastic to calculate error budgets from individual component DIP, 28-terminal SOIC and 28-terminal PLCC package. specifications. 2. Dynamic Specifications for DSP Users. In addition to the traditional ADC and DAC specifications,the AD7569/AD7669 is specified for ac parameters, includ-ing signal-to-noise ratio, distortion and input bandwidth. 3. Fast Microprocessor Interface. The AD7569/AD7669 has bus interface timing compatiblewith all modern microprocessors, with bus access and relin-quish times less than 75 ns and write pulse width less than80 ns. REV. B Information furnished by Analog Devices is believed to be accurate andreliable. However, no responsibility is assumed by Analog Devices for itsuse, nor for any infringements of patents or other rights of third parties One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. which may result from its use. No license is granted by implication or Tel: 617/329-4700 World Wide Web Site: otherwise under any patent or patent rights of Analog Devices. Fax: 617/326-8703 © Analog Devices, Inc., 1996 AD7569/AD7669­SPECIFICATIONS (V 2 = RANGE = AGND DAC SPECIFICATIONS1 DD = +5 V 5%; VSS DAC = AGNDADC = DGND = 0 V; RL = 2 k , CL = 100 pF to AGNDDAC unless otherwise noted. All specifications TMIN to TMAX unless otherwise noted.) AD7569J, A Versions3 AD7569 AD7669 K, B AD7569

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AD7569 AD7669.pdf Datasheet