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AD5721R Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer AD5721R
Beschreibung Bipolar/Unipolar Voltage Output DACs
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 30 Seiten
AD5721R Datasheet, Funktion
Data Sheet
Multiple Range, 16-/12-Bit, Bipolar/Unipolar
Voltage Output DACs with 2 ppm/°C Reference
AD5761R/AD5721R
FEATURES
GENERAL DESCRIPTION
8 software-programmable output ranges: 0 V to 5 V, 0 V to 10 V,
0 V to 16 V, 0 V to 20 V, ±3 V, ±5 V, ±10 V, and −2.5 V to +7.5 V;
5% overrange
Low drift 2.5 V reference: ±2 ppm/°C typical
Total unadjusted error (TUE): 0.1% FSR maximum
16-bit accuracy: ±2 LSB maximum
Guaranteed monotonicity: ±1 LSB maximum
Single channel, 16-/12-bit DACs
Settling time: 7.5 μs typical
Integrated reference buffers
Low noise: 35 nV/√Hz
Low glitch: 1 nV-sec (0 V to 5 V range)
1.7 V to 5.5 V digital supply range
Asynchronous updating via LDAC
Asynchronous RESET to zero scale/midscale
DSP-/microcontroller-compatible serial interface
Robust 4 kV HBM ESD rating
16-lead, 3 mm × 3 mm LFCSP package
16-lead TSSOP package
Operating temperature range: −40°C to +125°C
APPLICATIONS
The AD5761R/AD5721R are single channel, 16-/12-bit serial
input, voltage output, digital-to-analog converters (DACs).
They operate from single supply voltages from 4.75 V to 30 V
or dual supply voltages from −16.5 V to 0 V VSS and 4.75 V to
16.5 V VDD. The integrated output amplifier, reference buffer,
and reference provide a very easy to use, universal solution.
The devices offer guaranteed monotonicity, integral nonlinearity
(INL) of ±2 LSB maximum, 35 nV/√Hz noise, and 7.5 μs settling
time on selected ranges.
The AD5761R/AD5721R use a serial interface that operates at
clock rates of up to 50 MHz and are compatible with DSP and
microcontroller interface standards. Double buffering allows the
asynchronous updating of the DAC output. The input coding
is user-selectable twos complement or straight binary. The
asynchronous reset function resets all registers to their default
state. The output range is user selectable, via the RA[2:0] bits
in the control register.
The devices available in a 3 mm × 3 mm LFCSP package and a
16-lead TSSOP package offer guaranteed specifications over the
−40°C to +125°C industrial temperature range.
Industrial automation
Instrumentation, data acquisition
Open-/closed-loop servo control, process control
Programmable logic controllers
FUNCTIONAL BLOCK DIAGRAM
VDD
VREFIN/VREFOUT
DVCC
ALERT
SDI
SCLK
SYNC
SDO
RESET
CLEAR
AD5761R/AD5721R
2.5V
REFERENCE
REFERENCE
BUFFERS
INPUT SHIFT
REGISTER
AND
CONTROL
LOGIC
12/16
INPUT
REG
DAC 12/16
REG
12-BIT/
16-BIT
DAC
NOTES
DNC
DGND VSS
LDAC
AGND
1. DNC = DO NOT CONNECT. DO NOT CONNECT TO THIS PIN.
Figure 1.
VOUT
0V TO 5V
0V TO 10V
0V TO 16V
0V TO 20V
±3V
±5V
±10V
2.5V TO +7.5V
Rev. A
Document Feedback
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2014–2015 Analog Devices, Inc. All rights reserved.
Technical Support
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AD5721R Datasheet, Funktion
AD5761R/AD5721R
Data Sheet
AC PERFORMANCE CHARACTERISTICS
VDD1 = 4.75 V to 30 V, VSS1 = −16.5 V to 0 V, AGND = DGND = 0 V, VREFIN/VREFOUT = 2.5 V external, DVCC = 1.7 V to 5.5 V, RLOAD = 1 kΩ
for all ranges except 0 V to 16 V and 0 V to 20 V for which RLOAD = 2 kΩ, CLOAD = 200 pF, all specifications TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter2
Min Typ Max Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE3
Output Voltage Settling Time
9 12.5 µs
20 V step to 1 LSB at 16-bit resolution
7.5 8.5 µs
10 V step to 1 LSB at 16-bit resolution
5 µs
512 LSB step to 1 LSB at 16-bit resolution
Digital-to-Analog Glitch Impulse
8
nV-sec ±10 V range
1 nV-sec 0 V to 5 V range
Glitch Impulse Peak Amplitude 15 mV ±10 V range
10 mV 0 V to 5 V range
Power-On Glitch
100 mV p-p
Digital Feedthrough
0.6 nV-sec
Output Noise
0.1 Hz to 10 Hz Bandwidth
15 µV p-p
100 kHz Bandwidth
45 µV rms 0 V to 20 V and 0 V to 16 V ranges, 2.5 V external reference
35 µV rms 0 V to 10 V, ±10 V, and −2.5 V to +7.5 V ranges, 2.5 V external reference
25 µV rms ±5 V range, 2.5 V external reference
15 µV rms 0 V to 5 V and ±3 V ranges, 2.5 V external reference
Output Noise Spectral Density, 80 nV/√Hz ±10 V range, 2.5 V external reference
at 10 kHz
35 nV/√Hz ±3 V range, 2.5 V external reference
70 nV/√Hz ±5 V, 0 V to 10 V, and −2.5 V to +7.5 V ranges, 2.5 V external reference
110 nV/√Hz 0 V to 20 V range, 2.5 V external reference
90 nV/√Hz 0 V to 16 V range, 2.5 V external reference
45 nV/√Hz 0 V to 5 V range, 2.5 V external reference
Total Harmonic Distortion (THD)4
−87 dB 2.5 V external reference, 1 kHz tone
Signal-to-Noise Ratio (SNR)
92 dB At ambient, 2.5 V external reference, BW = 20 kHz, fOUT = 1 kHz
Peak Harmonic or Spurious
Noise (SFDR)
92 dB At ambient, 2.5 V external reference, BW = 20 kHz, fOUT = 1 kHz
Signal-to-Noise-and-Distortion 85 dB At ambient, 2.5 V external reference, BW = 20 kHz, fOUT = 1 kHz
(SINAD) Ratio
1 For specified performance, headroom requirement is 1 V.
2 Temperature range: −40°C to +125°C, typical at +25°C.
3 Guaranteed by design and characterization, not production tested.
4 Digitally generated sine wave at 1 kHz.
Rev. A | Page 6 of 35

6 Page









AD5721R pdf, datenblatt
AD5761R/AD5721R
TYPICAL PERFORMANCE CHARACTERSTICS
2.0
+5V SPAN
+10V SPAN
1.5 +16V SPAN
+20V SPAN
VVDSSD
=
=
+21V
–11V
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
0
10000 20000 30000 40000 50000 60000
DAC CODE
Figure 7. AD5761R INL Error vs. DAC Code, Unipolar Output
0.5
+5V SPAN
0.4
+10V SPAN
+16V SPAN
+20V SPAN
0.3
VVDSSD
=
=
+21V
–11V
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
0
500 1000 1500 2000 2500 3000 3500 4000
DAC CODE
Figure 8. AD5721R INL Error vs. DAC Code, Unipolar Output
2.0
±3V SPAN
±5V SPAN
1.5 ±10V SPAN
–2.5V TO +7.5V SPAN
1.0
VVDSSD
=
=
+21V
–11V
0.5
0
–0.5
–1.0
–1.5
–2.0
0
10000
20000
30000 40000
DAC CODE
50000
60000
Figure 9. AD5761R INL Error vs. DAC Code, Bipolar Output
Data Sheet
0.5
±3V SPAN
0.4
±5V SPAN
±10V SPAN
–2.5V TO +7.5V SPAN
0.3
VVDSSD
=
=
+21V
–11V
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
0
500 1000 1500 2000 2500 3000 3500 4000
DAC CODE
Figure 10. AD5721R INL Error vs. DAC Code, Bipolar Output
1.0
+5V SPAN
0.8
+10V SPAN
+16V SPAN
+20V SPAN
0.6
VVDSSD
=
=
+21V
–11V
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
10000 20000 30000 40000 50000 60000
DAC CODE
Figure 11. AD5761R DNL Error vs. DAC Code, Unipolar Output
0.5
+5V SPAN
0.4
+10V SPAN
+16V SPAN
+20V SPAN
0.3
VVDSSD
=
=
+21V
–11V
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
0
500 1000 1500 2000 2500 3000 3500 4000
DAC CODE
Figure 12. AD5721R DNL Error vs. DAC Code, Unipolar Output
Rev. A | Page 12 of 35

12 Page





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