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DAC7678SPW Datasheet(PDF) 1 Page - Texas Instruments |
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DAC7678SPW Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 52 page  DAC7678 Data Buffer A DAC Register A Buffer Control Register Control Control Logic Input Control Logic Power-Down Control Logic AV DD V REFIN REFOUT / V 12-Bit DAC CLR LDAC ADDR0 SDA SCL 2.5V Reference Data Buffer B DAC Register B Data Buffer C Data Buffer D Data Buffer E Data Buffer F Data Buffer G DAC Register C DAC Register D DAC Register E DAC Register F DAC Register G V H OUT Data Buffer H DAC Register H V G OUT V F OUT V E OUT V D OUT V C OUT V B OUT V A OUT GND ADDR1 12-Bit DAC 12-Bit DAC 12-Bit DAC 12-Bit DAC 12-Bit DAC 12-Bit DAC 12-Bit DAC RSTSEL DAC7678 www.ti.com SBAS493A – FEBRUARY 2010 – REVISED AUGUST 2010 12-Bit, Octal-Channel, Ultra-Low Glitch, Voltage Output, Two-Wire Interface Digital-to-Analog Converter with 2.5V Internal Reference Check for Samples: DAC7678 1 FEATURES APPLICATIONS • Portable Instrumentation 23 • Relative Accuracy: • Closed-Loop Servo-Control – 1 LSB INL • Process Control • Glitch Energy: 0.15nV-s • Data Acquisition Systems • Internal Reference: • Programmable Attenuation – 2.5V Reference Voltage (disabled by • PC Peripherals default) – ±5mV Initial Accuracy (max) DESCRIPTION – 5ppm/°C Temperature Drift (typ) The DAC7678 is a low-power, voltage-output, octal – 25ppm/°C Temperature Drift (max) channel, 12-bit digital-to-analog converter (DAC). The – 20mA Sink/Source Capability DAC7678 includes a 2.5V internal reference (disabled by default), giving a full-scale output voltage range of • Power-On Reset to Zero Scale or Midscale 5V. The internal reference has an initial accuracy of – Devices in the TSSOP Package Reset to ±5mV and can source up to 20mA at the Zero Scale VREFIN/VREFOUT pin. The device is monotonic, – Devices in the QFN Package Reset to Zero provides very good linearity, and minimizes undesired Scale or Midscale code-to-code transient voltages (glitch). • Ultra-Low Power Operation: 0.13mA/Channel The DAC7678 uses a versatile, 2-wire serial interface at 5V (without internal reference current) that is I2C-compatible and operates at clock rates of up to 3.4MHz. Multiple devices can share the same • Wide Power-Supply Range: +2.7V to +5.5V bus. • 2-Wire Serial Interface ( I2C™ compatible) The DAC7678 incorporates a power-on-reset circuit • On-Chip Output Buffer Amplifier with that ensures the DAC output powers up to either Rail-to-Rail Operation zero-scale or mid-scale until a valid code is written to • Temperature Range: –40°C to +125°C the device. These devices contain a power-down feature, accessed over the serial interface that reduces the current consumption of the device to typically 0.42mA at 5V. Power consumption (including internal reference) is typically 3.56mW at 3V, reducing to 0.68mW in power-down mode. The low power consumption, internal reference, and small footprint make this device ideal for portable, battery-operated equipment. The DAC7678 is drop-in and functionally compatible with DAC5578, DAC6578, and DAC7578. All devices are available in a 4x4 QFN-24 package and a TSSOP-16 package. RELATED DEVICES 8-BIT 10-BIT 12-BIT Pin- and Function-Compatible — — DAC7678 (w/internal reference) Pin- and Function-Compatible DAC5578 DAC6578 DAC7578 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 I2C is a trademark of NXP Semiconductors. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2010, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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