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AD7112 датащи(PDF) 2 Page - Analog Devices

номер детали AD7112
подробное описание детали  LC2MOS LOGDAC Dual Logarithmic D/A Converter
PDF  12 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD7112 датащи(HTML) 2 Page - Analog Devices

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REV. 0
–2–
AD7112–SPECIFICATIONS (V
DD = +5 V
5%; OUT A = OUT B = AGND = DGND = 0 V; VIN A = VIN B = 10 V.
Output amplifier AD712 except where noted. All specifications TMIN to TMAX unless otherwise noted.)
C Version
1
B Version
TA =TA =TA =TA =
Parameter
+25 CTMIN, TMAX
+25 CTMIN, TMAX
Units
Conditions/Comments
ACCURACY
Resolution
0.375
0.375
0.375
0.375
dB
Accuracy Relative to
Guaranteed Attenuation
0 dB Attenuation
Ranges for Specified Step Sizes.
0.375 dB Steps:
Accuracy
≤ ±0.17 dB
0 to 36
0 to 36
0 to 30
0 to 30
dB min
Monotonic
0 to 54
0 to 54
0 to 48
0 to 48
dB min
0.75 dB Steps:
Accuracy
≤ ±0.35 dB
0 to 48
0 to 42
0 to 42
0 to 36
dB min
Monotonic
0 to 72
0 to 66
0 to 72
0 to 60
dB min
1.5 dB Steps:
Accuracy
≤ ±0.7 dB
0 to 54
0 to 48
0 to 48
0 to 42
dB min
Monotonic
Full Range 0 to 78
0 to 85.5
0 to 72
dB min
Full Range Is 0 dB to 88.5 dB.
3.0 dB Steps:
Accuracy
≤ ±1.4 dB
0 to 66
0 to 54
0 to 60
0 to 48
dB min
Monotonic
Full Range Full Range
Full Range
Full Range
dB min
6.0 dB Steps:
Accuracy
≤ ±2.7 dB
0 to 72
0 to 60
0 to 60
0 to 60
dB min
Monotonic
Full Range Full Range
Full Range Full Range
dB min
Gain Error
±0.1
±0.15
±0.15
±0.2
dB max
Measured Using RFB A,
RFB B. Both DAC Registers
Loaded With All 0s.
Output Leakage Current
OUT A, OUT B
±50
±400
±50
±400
nA max
Input Resistance,
VIN A, VIN B
9/15
9/15
9/15
9/15
k
Ω min/max Typically 12 kΩ.
Input Resistance Match
±1
±1
±2
±2
% max
Feedback Resistance,
RFB A, RFB B
9.3/15.7
9.3/15.7
9.3/15.7
9.3/15.7
k
Ω min/max
LOGIC INPUTS
CS
, WR,
DAC A
/DAC B,
DB0–DB7
Input Low Voltage, VINL
0.8
0.8
0.8
0.8
V max
Input High Voltage, VINH 2.4
2.4
2.4
2.4
V min
Input Leakage Current
±1
±10
±1
±10
µA max
Input Capacitance
2
10
10
10
10
pF max
POWER REQUIREMENTS
VDD, Range
3
4.75/5.25
4.75/5.25
4.75/5.25
4.75/5.25
V min/max
For Specified Performance.
2
2
2
2
mA max
Logic Inputs = VIL or VIH
2
2
2
2
mA max
Logic Inputs = 0 V or VDD
NOTES
lTemperature range as follows: B, C Versions: –40
°C to +85°C.
2Guaranteed by design, not production tested.
3The part will function with V
DD = 5 V ± 10% with degraded performance.
Specifications subject to change without notice.



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