DAC11001A 20-bit monotonic DAC with ultra-low noise, low glitch and exceptional THD | TI.com

DAC11001A
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20-bit monotonic DAC with ultra-low noise, low glitch and exceptional THD

 

Description

The 20-bit DAC11001A, 18-bit DAC91001, and 16-bit DAC81001 (DACx1001) are highly accurate, low-noise, voltage-output, single-channel, digital-to-analog converters (DACs). The DACx1001 are specified monotonic by design, and offer excellent linearity of less than 4 LSB (max) across all ranges.

The unbuffered voltage output offers low noise performance (7 nV/√Hz) in combination with a fast settling time (1µs), making this device an excellent choice for low-noise, fast control-loop, and waveform generation applications. The DACx1001 integrates an enhanced deglitch circuit with code-independent ultra-low glitch (1 nV-s) to enable clean waveform ramps with ultra-low total harmonic distortion (THD).

The DACx1001 devices incorporate a power-on-reset circuit so that the DAC powers with known values in the registers. With external references, DAC output ranges from VREFPF to VREFNF can be achieved, including asymmetric output ranges.

The DACx1001 use a versatile 4–wire serial interface that operates at clock rates of up to 50 MHz. The DACx1001 is specified over the industrial temperature range of –40°C to +125°C.

Features

  • 20-bit monotonic: 1-LSB DNL (max)
  • Integral linearity: 4-LSB INL (max)
  • Low noise: 7nV/√Hz
  • Code independent low glitch:
    1 nV-s
  • Excellent THD: –105 dB at 1-kHz fOUT
  • Fast settling: 1 µs
  • Flexible output ranges: VREFPF to VREFNF
  • Integrated, precision feedback resistors
  • 50-MHz, 4-wire SPI-compatible interface
    • Readback
    • Daisy-chain
  • Temperature range: –40°C to +125˚C
  • Package: 48-pin TQFP

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Parametrics

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Part number Order Resolution (Bits) Architecture DAC channels Interface Output range (Min) (mA/V) Settling time (µs) Output type Reference: type Rating Operating temperature range (C)
DAC11001A Order now 20     R-2R     1     SPI       1     Unbuffered Voltage     Ext     Catalog     -40 to 125    
DAC81001 Samples not available 16     R-2R     1     SPI     -15     1     Unbuffered Voltage     Ext     Catalog     -40 to 125    
DAC91001 Order now 18     R-2R     1     SPI       1     Unbuffered Voltage     Ext     Catalog     -40 to 125