Part # AD7537 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD7537 LC2MOS (8+4) Loading Dual 12-Bit DAC


Part Details:

a LC2MOS (8+4) Loading Dual 12-Bit DAC AD7537 FUNCTIONAL BLOCK DIAGRAM FEATURESTwo 12-Bit DACs in One PackageDAC Ladder Resistance Matching: 0.5%Space Saving Skinny DIP and Surface Mount Packages4-Quadrant MultiplicationLow Gain Error (1 LSB max Over Temperature)Byte Loading StructureFast Interface Timing APPLICATIONSAutomatic Test EquipmentProgrammable FiltersAudio ApplicationsSynchro ApplicationsProcess Control GENERAL DESCRIPTIONThe AD7537 contains two 12-bit current output DACs on onemonolithic chip. A separate reference input is provided for eachDAC. The dual DAC saves valuable board space, and themonolithic construction ensures excellent thermal tracking.Both DACs are guaranteed 12-bit monotonic over the full tem-perature range. The AD7537 has a 2-byte (8 LSBs, 4 MSBs) loading structure.It is designed for right-justified data format. The control signalsfor register loading are A0, A1, CS, WR and UPD. Data isloaded to the input registers when CS and WR are low. To PRODUCT HIGHLIGHTS transfer this data to the DAC registers, UPD must be taken low 1. DAC to DAC Matching: with WR. Since both DACs are fabricated on the same chip, precisematching and tracking is inherent. Many applications which Added features on the AD7537 include an asynchronous CLR are not practical using two discrete DACs are now possible. line which is very useful in calibration routines. When this is Typical matching: 0.5%. taken low, all registers are cleared. The double buffering of thedata inputs allows simultaneous update of both DACs. Also, 2. Small Package Size: each DAC has a separate AGND line. This increases the device The AD7537 is packaged in small 24-pin 0.3" DIPs and in versatility; for instance one DAC may be operated with 28-terminal surface mount packages. AGND biased while the other is connected in the standard 3. Wide Power Supply Tolerance: configuration. The device operates on a +12 V to +15 V VDD, with ± 10% The AD7537 is manufactured using the Linear Compatible tolerance on this nominal figure. All specifications are CMOS (LC2MOS) process. It is speed compatible with most guaranteed over this range. microprocessors and accepts TTL, 74HC and 5 V CMOS logiclevel inputs. REV. 0 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 partieswhich may result from its use. No license is granted by implication or One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. otherwise under any patent or patent rights of Analog Devices. Tel: 617/329-4700 Fax: 617/326-8703 AD7537­SPECIFICATIONS (VDD = +12 V to +15 V, 10%, VREFA = VREFB = 10 V; IOUTA = AGND = 0 V, IOUTB = AGNDB = 0 V. All specifications TMIN to TMAX unless otherwise noted.) J, A K, B L, C S T U Parameter Versions Versions Versions Version Version Version


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AD7537.pdf Datasheet