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DAC5574 Datasheet(PDF) 24 Page - Texas Instruments

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Part No. DAC5574
Description  QUAD, 8-BIT, LOW-POWER, VOLTAGE OUTPUT, I2C INTERFACE DIGITAL TO ANALOG CONVERTER
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

DAC5574 Datasheet(HTML) 24 Page - Texas Instruments

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CROSSTALK
OUTPUT VOLTAGE STABILITY
SETTLING TIME AND OUTPUT GLITCH PERFORMANCE
DAC5574
SLAS407 – DECEMBER 2003
The DAC5574 architecture uses separate resistor strings for each DAC channel in order to achieve ultra-low
crosstalk performance. DC crosstalk seen at one channel during a full-scale change on the neighboring channel
is typically less than 0.0025 LSBs. The ac crosstalk measured (for a full-scale, 1 kHz sine wave output generated
at one channel, and measured at the remaining output channel) is typically under –100 dB.
The DAC5574 exhibits excellent temperature stability of
±3 ppm/°C typical output voltage drift over the specified
temperature range of the device. This enables the output voltage of each channel to stay within a
±25 µV window
for a
±1°C ambient temperature change. Combined with good dc noise performance and true 8-bit differential
linearity, the DAC5574 becomes a perfect choice for closed-loop control applications.
Settling time to within the 8-bit accurate range of the DAC5574 is achievable within 6 µs for a full-scale code
change at the input. Worst case settling times between consecutive code changes is typically less than 2 µs. The
high-speed serial interface of the DAC5574 is designed in order to support up to 188 kSPS update rate. For
full-scale output swings, the output stage of each DAC5574 channel typically exhibits less than 100 mV of
overshoot and undershoot when driving a 200 pF capacitive load. Code-to-code change glitches are extremely
low (~10 µV) given that the code-to-code transition does not cross an Nx16 code boundary. Due to internal
segmentation of the DAC5574, code-to-code glitches occur at each crossing of an Nx16 code boundary. These
glitches can approach 100 mVs for N = 15, but settle out within ~2 µs. Sufficient bypass capacitance is required
to ensure 10 µs settling under capacitive loading. To observe the settling performance under resistive load
conditions, the power supply (hence DAC5574 reference supply) must settle quicker than the DAC5574.
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