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.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
DAC11001A | TQFP (48) | 7.00 mm × 7.00 mm |
DAC91001 | ||
DAC81001 |
Changes from A Revision (December 2019) to B Revision
Changes from * Revision (October 2019) to A Revision
DEVICE | RESOLUTION |
---|---|
DAC11001A | 20-bit |
DAC91001 | 18-bit |
DAC81001 | 16-bit |
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
AGND | 2, 35, 38, 40, 42, 43, 46, 47 | Analog ground | Connect to 0 V. |
AGND-OUT | 8 | Analog ground | Connect to 0 V. Measure DAC output voltage with respect to this node. |
AGND-TnH | 14 | Analog ground | Connect to 0 V. Integrated deglitcher clock ground.. |
ALARM | 19 | Output | Alarm output |
AVDD | 39, 41 | Power | Positive low voltage analog power supply |
CLR | 30 | Input | DAC registers clear pin, active low |
DGND | 16, 17, 20, 21, 22, 23, 26 | Digital ground | Connect to 0 V. |
DVDD | 27 | Power | Digital power supply pin |
RFB | 9 | Input | Integrated precision resistor feedback node |
IOVDD | 28 | Power | Interface power supply pin |
LDAC | 18 | Input | Load DAC pin, active low |
NC | 1, 12, 13, 15, 24, 25, 29, 36, 37, 48 | — | No connection, leave floating |
OUT | 7 | Output | Unbuffered voltage output |
RCM | 11 | Input | Integrated precision resistor common-mode node |
REFNF | 5 | Input | External negative reference input. Connect to 0 V for unipolar DAC output. |
REFNS | 6 | Input | External negative reference sense node |
REFPF | 3 | Input | External positive reference input |
REFPS | 4 | Input | External positive reference sense node |
ROFS | 10 | Input | Integrated precision resistor offset node |
SCLK | 31 | Input | Serial clock input of serial peripheral interface (SPI). Schmitt-trigger logic input.
Data are transferred at rates of up to 50 MHz. |
SDIN | 32 | Input | Serial data input. Schmitt-trigger logic input.
Data are clocked into the input shift register on the falling edge of the serial clock input. |
SDO | 34 | Output | Serial data output. Data are valid on the falling edge of SCLK. |
SYNC | 33 | Input | SPI bus chip select input (active low). Data bits are not clocked into the serial shift register unless SYNC is low. When SYNC is high, the SDO pin is in high-impedance status. |
VCC | 45 | Power | Analog positive power supply |
VSS | 44 | Power | Analog negative power supply |