DAC7568IAPWR.A datasheet(32/72 Pages) TI2

tên linh kiện	DAC7568IAPWR.A

Giải thích chi tiết về linh kiện	DAC7568, DAC8168, DAC8568 12-/14-/16-Bit, Octal-Channel, Ultralow Glitch, Voltage Output, Digital-to-Analog Converters with 2.5-V 2-ppm/°C Internal Reference

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nhà sản xuất	TI2 [Texas Instruments]

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REF

DIVIDER

ToOutputAmplifier

(2xGain)

OUT

Gain

REF

DAC7568, DAC8168, DAC8568

SBAS430F – JANUARY 2009 – REVISED APRIL 2018

www.ti.com

Product Folder Links: DAC7568 DAC8168 DAC8568

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Feature Description (continued)

(1)

Where:

DIN = decimal equivalent of the binary code that is loaded to the DAC register. It can range from 0 to 4095 for

DAC7568 (12 bit), 0 to 16,383 for DAC8168 (14 bit), and 0 to 65535 for DAC8568 (16 bit).

n = resolution in bits; either 12 (DAC7568), 14 (DAC8168) or 16 (DAC8568)

Gain = 1 for A/B grades or 2 for C/D grades.

8.2.2 Resistor String

The resistor string section is shown in Figure 121. It is simply a string of resistors, each of value R. The code

loaded into the DAC register determines at which node on the string the voltage is tapped off to be fed into the

output amplifier by closing one of the switches connecting the string to the amplifier. It is monotonic because it is

a string of resistors.

Figure 121. Resistor String

8.2.3 Output Amplifier

The output buffer amplifier is capable of generating rail-to-rail voltages on its output, giving a maximum output

range of 0V to AVDD. It is capable of driving a load of 2kΩ in parallel with 3000pF to GND. The source and sink

capabilities of the output amplifier can be seen in the Typical Characteristics. The typical slew rate is 0.75V/μs,

with a typical full-scale settling time of 5μs with the output unloaded.

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