1 ppm, 20-Bit,
±1 LSB INL, Voltage Output DAC
1 ppm resolution
1 ppm INL
7.5 nV/√Hz noise spectral density
0.19 LSB long-term linearity stability
<0.05 ppm/°C temperature drift
1 µs settling time
1.4 nV-sec glitch impulse
20-lead TSSOP package
Wide power supply range up to ±16.5 V
35 MHz Schmitt triggered digital interface
1.8 V compatible digital interface
Extended automotive operating temperature range: −55°C
ENHANCED PRODUCT FEATURES
Supports defense and aerospace applications (AQEC
Military temperature range (−55°C to +125°C)
Controlled manufacturing baseline
One assembly/test site
One fabrication site
Enhanced product change notification
Qualification data available on request
Test and measurement
High end scientific and aerospace instrumentation
The AD5791-EP1 is a single 20-bit, unbuffered voltage-output
DAC that operates from a bipolar supply of up to 33 V. The
AD5791 accepts a positive reference input in the range 5 V to
VDD − 2.5 V and a negative reference input in the range VSS +
2.5 V to 0 V. The AD5791-EP offers a relative accuracy
specification of ±1 LSB max, and operation is guaranteed
monotonic with a ±1 LSB DNL maximum specification.
The part uses a versatile 3-wire serial interface that operates at
clock rates up to 35 MHz and that is compatible with standard
SPI, QSPI™, MICROWIRE™, and DSP interface standards. The
part incorporates a power-on reset circuit that ensures the DAC
output powers up to 0 V in a known output impedance state
and remains in this state until a valid write to the device takes
FUNCTIONAL BLOCK DIAGRAM
AND CLEAR LOGIC
DGND VSS AGND VREFNF VREFNS
Ultra precision op amps: AD8675, AD8676
High voltage op amp: ADA4898-1
Additional companion products on the AD5791 product page
Table 1. Related Device
18-bit, 0.5 LSB INL, voltage output DAC
place. The part provides an output clamp feature that places the
output in a defined load state.
The AD5791-EP is available in a compact, 20-lead TSSOP
package and operates at the extended automotive temperature
range of −55°C to +125°C. Additional application and technical
information can be found in the AD5791 data sheet.
1. 1 ppm Accuracy.
2. Wide Power Supply Range up to ±16.5 V.
3. Operating Temperature Range: −55°C to +125°C.
4. Low 7.5 nV/√Hz Noise Spectral Density.
5. Low 0.05 ppm/°C Temperature Drift.
1 Protected by U.S. Patents No. 7,884,747 and 8,089,380. Other patents pending.
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