參數(shù)資料
型號(hào)： AD7568
廠商： Analog Devices, Inc.
英文描述： Octal 12-Bit DAC(LC2MOS八通道12位D/A轉(zhuǎn)換器)
中文描述： 八通道12位DAC（LC2MOS八通道12位的D / A轉(zhuǎn)換器）
文件頁數(shù)： 2/12頁
文件大?。?/td> 251K
代理商： AD7568
REV. B
–2–
AD7568–SPECIFICATIONS
1
Parameter
AD7568B
2
Units
T est Conditions/Comments
ACCURACY
Resolution
Relative Accuracy
Differential Nonlinearity
Gain Error
+25
°
C
T
MIN
to T
MAX
Gain T emperature Coefficient
12
±
0.5
±
0.9
Bits
LSB max
LSB max
1 LSB = V
REF
/2
12
= 1.22 mV when V
REF
= 5 V
All Grades Guaranteed Monotonic over T emperature
±
4
±
5
2
5
LSBs max
LSBs max
ppm FSR/
°
C typ
ppm FSR/
°
C max
Output Leakage Current
I
OUT 1
@ +25
°
C
T
MIN
to T
MAX
10
200
nA max
nA max
See T erminology Section
REFERENCE INPUT
Input Resistance
5
9
2
k
min
k
max
% max
T ypical Input Resistance = 7 k
Ladder Resistance Mismatch
T ypically 0.6%
DIGIT AL INPUT S
V
INH
, Input High Voltage
V
INL
, Input Low Voltage
I
INH
, Input Current
C
IN
, Input Capacitance
2.4
0.8
±
1
10
V min
V max
μ
A max
pF max
POWER REQUIREMENT S
V
DD
Range
Power Supply Sensitivity
Gain/
V
DD
I
DD
4.75/5.25
V min/V max
–75
300
3.5
dB typ
μ
A max
mA max
V
INH
= 4.0 V min, V
INL
= 0.4 V max
V
INH
= 2.4 V min, V
INL
= 0.8 V max
AC PERFORMANCE CHARACTERISTICS
Parameter
AD7568B
2
Units
T est Conditions/Comments
DYNAMIC PERFORMANCE
Output Voltage Settling T ime
500
ns typ
T o 0.01% of Full-Scale Range. DAC Latch Alternately
Loaded with All 0s and All 1s.
Measured with V
REF
= 0 V. DAC Register Alternately
Loaded with All 0s and All 1s.
V
REF
= 20 V pk-pk, 10 kHz Sine Wave. DAC Latch
Loaded with All 0s.
All 1s Loaded to DAC.
All 0s Loaded to DAC.
Feedthrough from Any One Reference to the Others
with 20 V pk-pk, 10 kHz Sine Wave Applied.
Effect of all 0s to all 1s Code T ransition on
Nonselected DACs.
Feedthrough to Any DAC Output with
FSIN
High
and Square Wave Applied to SDIN and SCLK .
V
REF
= 6 V rms, 1 kHz Sine Wave.
Digital to Analog Glitch Impulse
40
nV–s typ
Multiplying Feedthrough Error
–66
dB max
Output Capacitance
60
30
–76
pF max
pF max
dB typ
Channel-to-Channel Isolation
Digital Crosstalk
40
nV–s typ
Digital Feedthrough
40
nV–s typ
T otal Harmonic Distortion
Output Noise Spectral Density
@ 1 kHz
–83
dB typ
20
nV/
√
Hz
All 1s Loaded to the DAC. V
REF
= 0 V. Output Op
Amp is AD OP07.
NOT ES
1
T emperature range as follows: B Version: –40
°
C to +85
°
C.
2
All specifications also apply for V
REF
= +10 V, except relative accuracy which degrades to
±
1 LSB.
Specifications subject to change without notice.
(V
DD
= +4.75 V to +5.25 V; I
OUT1
= I
OUT2
= OV; V
REF
= +5 V; T
A
= T
MN
to T
MAX
,
unless otherwse noted)
(These characteristics are included for Design Guidance and are not subject
to test. DAC output op amp is AD843.)
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