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AD5780BCPZ Datenblatt(PDF) 1 Page - Analog Devices |
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AD5780BCPZ Datenblatt(HTML) 1 Page - Analog Devices |
1 / 28 page System Ready, 18-Bit ±1 LSB INL, Voltage Output DAC Data Sheet AD5780 Rev. C 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 ©2011–2012 Analog Devices, Inc. All rights reserved. FEATURES True 18-bit voltage output DAC, ±1 LSB INL 8 nV/√Hz output noise spectral density 0.025 LSB long-term linearity error stability ±0.018 ppm/°C gain error temperature coefficient 2.5 μs output voltage settling time 3.5 nV-sec midscale glitch impulse Integrated precision reference buffers Operating temperature range: −40°C to +125°C 4 mm × 5 mm LFCSP package Wide power supply range of up to ±16.5 V 35 MHz Schmitt triggered digital interface 1.8 V-compatible digital interface APPLICATIONS Medical instrumentation Test and measurement Industrial control Scientific and aerospace instrumentation Data acquisition systems Digital gain and offset adjustment Power supply control FUNCTIONAL BLOCK DIAGRAM A1 6.8kΩ 6kΩ 6.8kΩ R1 RFB 18-BIT DAC DAC REG 18 18 INPUT SHIFT REGISTER AND CONTROL LOGIC POWER-ON RESET AND CLEAR LOGIC AD5780 IOVCC SDIN VCC VDD VREFN AGND VSS DGND SCLK SYNC SDO LDAC CLR RESET RFB INV VOUT VREFP Figure 1. Table 1. Related Devices Part No. Description AD5790 20-bit, 2 LSB accurate DAC AD5791 20-bit, 1 ppm accurate DAC AD5781 18-bit, 0.5 LSB accurate DAC AD5541A/AD5542A 16-bit, 1 LSB accurate 5 V DAC AD5760 16-bit, 0.5 LSB accurate DAC GENERAL DESCRIPTION The AD57801 is a true 18-bit, unbuffered voltage output DAC that operates from a bipolar supply of up to 33 V. The AD5780 accepts a positive reference input range of 5 V to VDD − 2.5 V and a negative reference input range of VSS + 2.5 V to 0 V. Both reference inputs are buffered on chip and external buffers are not required. The AD5780 offers a relative accuracy specifica- tion of ±1 LSB maximum range, and operation is guaranteed monotonic with a ±1 LSB DNL maximum range specification. The part uses a versatile 3-wire serial interface that operates at clock rates of up to 35 MHz and is compatible with standard SPI, QSPI™, MICROWIRE™, and DSP interface standards. The part incorporates a power-on reset circuit that ensures that the DAC output powers up to 0 V in a known output impedance state and remains in this state until a valid write to the device takes place. The part provides an output clamp feature that places the output in a defined load state. PRODUCT HIGHLIGHTS 1. True 18-bit accuracy. 2. Wide power supply range of up to ±16.5 V. 3. −40°C to +125°C operating temperature range. 4. Low 8 nV/√Hz noise. 5. Low ±0.018 ppm/°C gain error temperature coefficient. COMPANION PRODUCTS Output Amplifier Buffer: AD8675, ADA4898-1, ADA4004-1 External Reference: ADR445 DC-to-DC Design Tool: ADIsimPower™ Additional companion products on the AD5780 product page 1 Protected by U.S. Patent No. 7,884,747 and 8,089,380. |
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