AD7118CQ 查看數據表（PDF） - Analog Devices
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AD7118CQ Datasheet PDF : 6 Pages
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AD7118–SPECIFICATIONS (VDD = +5 V or +15 V, VIN = –10 V dc, IOUT = AGND = DGND = 0 V, output amplifier
AD544 except where noted)
Parameter
NOMINAL RESOLUTION
TA = +25؇C
VDD = +5 V VDD = +15 V
1.5
1.5
TA = TMIN, TMAX
VDD = +5 V VDD = +15 V
1.5
1.5
Units
dB
Test Conditions/Comments
ACCURACY RELATIVE TO VIN
AD7118L/C/U
0 dB to –30 dB
–31.5 dB to –42 dB
–43.5 dB to –48 dB
AD7118K/B/T
0 dB to –30 dB
–31.5 dB to –42 dB
± 0.35
± 0.35
± 0.4
± 0.4
± 0.7
± 0.5
± 0.8
± 0.7
± 1.0
± 0.7
± 1.3
± 1.0
± 0.5
± 0.5
± 0.5
± 0.5
± 0.75
± 0.75
± 1.0
± 0.8
dB max
dB max
dB max
dB max
dB max
Accuracy is measured using
circuit of Figure 1 and includes
any effects due to mismatch
between RFB and the R-2R
ladder circuit.
MONOTONIC RANGE
Nominal 1.5 dB Steps
Nominal 3 dB Steps
VIN INPUT RESISTANCE
(PIN 12)
RFB INPUT RESISTANCE
(PIN 13)
L/C/U Grade
K/B/T Grade
All Grades
All Grades
L/C/U Grade
K/B/T Grade
All Grades
L/C/U Grade
K/B/T Grade
Monotonic Over Full
0 to –72
Code Range
0 to –66
Monotonic Over Full Code Range
9
9
9
17
17
17
21
21
21
9.45
9.45
9.45
18
18
18
22
22
22
0 to –72
0 to –66
9
17
21
9.45
18
22
dB
Digital Inputs 000000 to 110000
dB
Digital Inputs 000000 to 101100
kΩ min
kΩ max
kΩ max
kΩ min
kΩ max
kΩ max
DIGITAL INPUTS
Input High Voltage Requirements VIH
3.0
13.5
3.0
13.5
V min
Input Low Voltage Requirements VIL
0.8
1.5
0.8
1.5
V max
Input Leakage Current
±1
±1
± 10
± 10
µA max Digital Inputs = VDD
POWER SUPPLY
VDD for Specified Accuracy
IDD
5
–
5
–
V min
–
15
–
15
V max
0.5
1
1
2
mA max Digital Inputs = 0 V or VDD
(See Figure 7)
Specifications subject to change without notice.
AC PERFORMANCE CHARACTERISTICS (VDD = +5 V or +15 V, VIN = –10 V except where stated, IOUT = AGND = DGND =
0 V, output amplifier AD544 except where noted)
These characteristics are included for design guidance only and are not subject to test.
Parameter
DC Supply Rejection, ∆Gain/∆VDD
Propagation Delay
Digital-to-Analog Glitch Impulse
Output Capacitance (Pin 14)
Input Capacitance Pin 12 and Pin 13
Feedthrough at 1 kHz
L/C/U Grade
K/B/T Grade
Total Harmonic Distortion
Intermodulation Distortion
Output Noise Voltage Density
Digital Input Capacitance
TA = +25؇C
TA = TMIN, TMAX
VDD = +5 V VDD = +15 V VDD = +5 V VDD = +15 V Units
0.01
0.005
0.01
0.005
dB per % max
1.8
0.4
2.2
0.5
225
1200
–
–
µs max
nV secs typ
100
100
7
7
–86
–86
–80
–80
–85
–85
–79
–79
70
70
7
7
100
100
7
7
–68
–68
–63
–63
–85
–85
–79
–79
70
70
7
7
pF max
pF max
dB max
dB max
dB typ
dB typ
nV/√Hz max
pF max
∆VDD = ± 10%,
Input code = 100000
Full-Scale Change
Measured with ADLH0032CG
as output amplifier for input
code transition 100000 to 000000.
C1 of Figure 1 is 0 pF.
Feedthrough is also deter-
mined by circuit layout
VIN = 6 V rms
per DIN 45403 Blatt 4
Includes AD544 amplifier noise
Specifications subject to change without notice.
Accuracy Specification for K/B/T Grade Devices at TA = +25°C
Accuracy Specification for L/C/U Grade Devices at TA = +25°C
–2–
REV. A
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