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AD5621BKS датащи(PDF) 1 Page - Analog Devices |
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AD5621BKS датащи(HTML) 1 Page - Analog Devices |
1 / 20 page 2.7 V to 5.5 V, <100 µA, 8-/10-/12-Bit nanoDAC™ D/A, SPI® Interface, SC70 Package Preliminary Technical Data AD5601/AD5611/AD5621 Rev. PrC Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. FEATURES 6-lead SC70 package Power-down to <100 nA @ 3 V Micropower operation: max 100 µA @ 5 V 2.7 V to 5.5 V power supply Guaranteed monotonic by design Power-on reset to 0 V with brownout detection 3 power-down functions Low power serial interface with Schmitt-triggered inputs On-chip output buffer amplifier, rail-to-rail operation SYNC interrupt facility Minimized zero code error AD5601 buffered 8-bit DAC in SC70: B Version: ±0.5 LSB INL AD5611 buffered 10-bit DAC in SC70: B Version: ±0.5 LSB INL A Version: ±4 LSB INL AD5621 buffered 12-bit DAC in SC70: B Version: ±1 LSB INL A Version: ±6 LSB INL APPLICATIONS Voltage level setting Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators FUNCTIONAL BLOCK DIAGRAM POWER-ON RESET DAC REGISTER 14-BIT DAC INPUT CONTROL LOGIC POWER-DOWN CONTROL LOGIC AD5601/AD5611/AD5621 VDD GND REF(+) RESISTOR NETWORK VOUT SYNC SCLK DIN OUTPUT BUFFER Figure 1. Table 1. Related Devices Part Number Description AD5641 2.7 V to 5.5 V, <100 µA, 14-Bit, nanoDAC D/A, tiny SC70 Package GENERAL DESCRIPTION The AD5601/AD5611/AD5621, members of the nanoDAC family, are single, 8-/10-/12-bit, buffered, voltage out DACs that operate from a single 2.7 V to 5.5 V supply, consuming <100 µA at 5 V. The parts come in a tiny SC70 package. Their on-chip precision output amplifier allows rail-to-rail output swing to be achieved. The AD5601/AD5611/AD5621 utilize a versatile 3-wire serial interface that operates at clock rates up to 30 MHz and is compatible with SPI®, QSPI™, MICROWIRE™, and DSP interface standards. The reference for the AD5601/AD5611/AD5621 is derived from the power supply inputs and, therefore, gives the widest dynamic output range. The parts incorporate a power-on reset circuit, which ensures that the DAC output powers up to 0 V and remains there until a valid write to the device takes place. The AD5601/AD5611/AD5621 contain a power-down feature that reduces current consumption to <100 nA at 3 V, and provides software-selectable output loads while in power-down mode. The parts are put into power-down mode over the serial interface. The low power consumption of these parts in normal operation makes them ideally suited to portable battery- operated equipment. The combination of small package and low power makes these nanoDAC devices ideal for level-setting requirements such as generating bias or control voltages in space-constrained and power-sensitive applications. (continued on Page 3) |
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