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AD5665RBRUZ-1 Arkusz danych(PDF) 1 Page - Analog Devices |
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AD5665RBRUZ-1 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 32 page Quad, 12-/14-/16-Bit nanoDACs® with 5ppm/°C On-chip Ref, I2C Interface Preliminary Technical Data AD5625R/AD5645R/AD5665R AD5625/AD5665 Rev. PrA Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved. FEATURES Low power, smallest pin-compatible, quad nanoDACs AD5625R/AD5645R/AD5665R 12-/14-/16 bits On-chip 1.25 V/2.5 V, 5 ppm/°C reference. AD5625/AD5665 12-/16 bits External reference only 3 mm x 3 mm LFCSP and 14-lead TSSOP 2.7 V to 5.5 V power supply Guaranteed monotonic by design Power-on reset to zero scale/midscale Per channel power-down I2C-compatible serial interface supports standard (100 kHz), fast (400 kHz), and high speed (3.4 MHz) modes APPLICATIONS Process control Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators ADDR1 SCL SDA INPUT REGISTER INPUT REGISTER INPUT REGISTER INPUT REGISTER DAC REGISTER DAC REGISTER DAC REGISTER DAC REGISTER BUFFER BUFFER BUFFER BUFFER VOUTA VOUTB VOUTC VOUTD 1.25V/2.5V REF VDD GND VREFIN/VREFOUT AD5625R/AD5645R/AD5665R POWER-DOWN LOGIC STRING DAC D STRING DAC C STRING DAC B STRING DAC A INTERFACE LOGIC LDAC CLR POR POWER-ON RESET ADDR2 NOTE. THE FOLLOWING PINS ARE AVAILABLE ONLY ON 14-PIN PACKAGE - ADDR2, LDAC, CLR, POR. ADDR1 SCL SDA INPUT REGISTER INPUT REGISTER INPUT REGISTER INPUT REGISTER DAC REGISTER DAC REGISTER DAC REGISTER DAC REGISTER BUFFER BUFFER BUFFER BUFFER VOUTA VOUTB VOUTC VOUTD VDD GND VREFIN AD5625/AD5665 POWER-DOWN LOGIC STRING DAC D STRING DAC C STRING DAC B STRING DAC A INTERFACE LOGIC LDAC CLR POR POWER-ON RESET ADDR2 NOTE. THE FOLLOWING PINS ARE AVAILABLE ONLY ON 14-PIN PACKAGE - ADDR2, LDAC, CLR, POR. Figure 1. Functional Block Diagrams GENERAL DESCRIPTION The AD5625R/AD5645R/AD5665R, AD5625/AD5665 members of the nanoDAC family, are low power, quad, 12-, 14-, 16-bit buffered voltage-out DACs with/without an on-chip reference. All devices operate from a single 2.7 V to 5.5 V supply, are guaranteed monotonic by design and have an I2C- compatible serial interface . The AD5625R/AD5645R/AD5665R have an on-chip reference. The AD56x5RBCPZ have a 1.25 V, 5 ppm/°C reference, giving a full-scale output range of 2.5 V; the AD56x5RBRUZ have a 2.5 V, 5 ppm/°C reference giving a full-scale output range of 5 V. The on-chip reference is off at power-up, allowing the use of an external reference. The internal reference is enabled via a software write. The AD5665 and AD5625 require an external reference voltage to set the output range of the DAC. The part incorporates a power-on reset circuit that ensures the DAC output powers up to 0 V or midscale and remains there until a valid write takes place. The part contains a per-channel power-down feature that reduces the current consumption of the device to 480 nA at 5 V and provides software-selectable output loads while in power-down mode. The low power consumption of this part in normal operation makes it ideally suited to portable battery-operated equipment. The on-chip precision output amplifier enables rail-to-rail output swing. The AD5625R/AD5645R/AD5665R, AD5625/AD5665 use a 2- wire I2C-compatible serial interface that operates in standard (100 kHz), fast (400 kHz), and high speed (3.4 MHz) modes. Table 1. Related Devices Part No. Description AD5624R/AD5644R/AD5664R AD5624/AD5664 Quad SPI 12-, 14-, 16-bit DACs, with/without internal reference. AD5627R/AD5647R/AD5667R AD5627/5667, Dual I2C 12-, 14-,16-bit DACs, with/without internal reference. AD5666 2.7 V to 5.5 V, Quad 16-bit DAC, internal r eference, SPI interface |
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