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AD7568 Datasheet(PDF) 2 Page - Analog Devices

Part # AD7568
Description  Octal 12-Bit DAC
Download  14 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7568 Datasheet(HTML) 2 Page - Analog Devices

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–2–
AD7568–SPECIFICATIONS1
Parameter
AD7568B
2
Units
Test Conditions/Comments
ACCURACY
Resolution
12
Bits
1 LSB = VREF/2
12 = 1.22 mV when V
REF = 5 V
Relative Accuracy
±0.5
LSB max
Differential Nonlinearity
±0.9
LSB max
All Grades Guaranteed Monotonic over Temperature
Gain Error
+25
°C
±4
LSBs max
TMIN to TMAX
±5
LSBs max
Gain Temperature Coefficient
2
ppm FSR/
°C typ
5
ppm FSR/
°C max
Output Leakage Current
IOUT1
@ +25
°C
10
nA max
See Terminology Section
TMIN to TMAX
200
nA max
REFERENCE INPUT
Input Resistance
5
k
Ω min
Typical Input Resistance = 7 k
9k
Ω max
Ladder Resistance Mismatch
2
% max
Typically 0.6%
DIGITAL INPUTS
VINH, Input High Voltage
2.4
V min
VINL, Input Low Voltage
0.8
V max
IINH, Input Current
±1
µA max
CIN, Input Capacitance
10
pF max
POWER REQUIREMENTS
VDD Range
4.75/5.25
V min/V max
Power Supply Sensitivity
∆Gain/∆V
DD
–75
dB typ
IDD
300
µA max
VINH = 4.0 V min, VINL = 0.4 V max
3.5
mA max
VINH = 2.4 V min, VINL = 0.8 V max
AC PERFORMANCE CHARACTERISTICS
Parameter
AD7568B
2
Units
Test Conditions/Comments
DYNAMIC PERFORMANCE
Output Voltage Settling Time
500
ns typ
To 0.01% of Full-Scale Range. DAC Latch Alternately
Loaded with All 0s and All 1s.
Digital to Analog Glitch Impulse
40
nV–s typ
Measured with VREF = 0 V. DAC Register Alternately
Loaded with All 0s and All 1s.
Multiplying Feedthrough Error
–66
dB max
VREF = 20 V pk-pk, 10 kHz Sine Wave. DAC Latch
Loaded with All 0s.
Output Capacitance
60
pF max
All 1s Loaded to DAC.
30
pF max
All 0s Loaded to DAC.
Channel-to-Channel Isolation
–76
dB typ
Feedthrough from Any One Reference to the Others
with 20 V pk-pk, 10 kHz Sine Wave Applied.
Digital Crosstalk
40
nV–s typ
Effect of all 0s to all 1s Code Transition on
Nonselected DACs.
Digital Feedthrough
40
nV–s typ
Feedthrough to Any DAC Output with FSIN High
and Square Wave Applied to SDIN and SCLK.
Total Harmonic Distortion
–83
dB typ
VREF = 6 V rms, 1 kHz Sine Wave.
Output Noise Spectral Density
@ 1 kHz
20
nV/
√Hz
All 1s Loaded to the DAC. VREF = 0 V. Output Op
Amp is AD OP07.
NOTES
1Temperature range as follows: B Version: –40
°C to +85°C.
2All specifications also apply for V
REF = +10 V, except relative accuracy which degrades to ± 1 LSB.
Specifications subject to change without notice.
(VDD = +4.75 V to +5.25 V; IOUT1 = IOUT2 = O V; VREF = +5 V; TA = TMIN to TMAX,
unless otherwise noted)
(These characteristics are included for Design Guidance and are not subject
to test. DAC output op amp is AD843.)
REV. C


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