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AD7112 Scheda tecnica(PDF) 3 Page - Analog Devices

Il numero della parte AD7112
Spiegazioni elettronici  LC2MOS LOGDAC Dual Logarithmic D/A Converter
PDF  12 Pages
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD7112 Scheda tecnica(HTML) 3 Page - Analog Devices

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AD7112
REV. 0
–3–
TIMING SPECIFICATIONS1
Parameter
TA = +25 CTA = –40 C to +85 C
Units
Conditions/Comments
CS
to WR Setup Time
tCS
0
0
ns min
See Figure 3.
CS
to WR Hold Time
tCH
0
0
ns min
DAC Select to WR Setup Time
tAS
4
4
ns min
DAC Select to WR Hold Time
tAH
0
0
ns min
Data Valid to WR Setup Time
tDS
55
55
ns min
Data Valid to WR Hold Time
tDH
10
10
ns min
WR
Pulse Width
tWR
53
53
ns min
NOTES
1Timing specifications guaranteed by design not production tested. All input signals are specified with tr = tf = 5 ns (10% to 90% of 5 V) and timed from a voltage
level of 1.6 V.
Specifications subject to change without notice.
AC PERFORMANCE CHARACTERISTICS1
TA =
TA =
–40 C to
Parameter
+25 C
+85 C
Units
Conditions/Comments
DC Supply Rejection
∆ Gain/∆ V
DD
0.001
0.005
dB/% max
∆ V
DD = ± 5%. Input Code = 00000000
Digital-to-Analog Glitch Impulse
10
10
nV s typ
Measured with AD843 as output amplifier for input
code transition 10000000 to 00000000.
Output Capacitance, COUT A, COUT B
50
50
pF max
AC Feedthrough
VIN A to OUT A
–94
–90
dB max
VIN A, VIN B = 6 V rms at 1 kHz. DAC
Registers loaded with all 1s.
VIN B to OUT B
–94
–90
dB max
Channel-to-Channel Isolation
VIN A to OUT B
–87
–87
dB typ
VIN A = 6 V rms at 10 kHz sine wave,
VIN B = 0 V. DAC Registers loaded with all 0s.
VIN B to OUT A
–87
–87
dB typ
VIN B = 6 V rms at 10 kHz sine wave,
VIN A = 0 V. DAC Registers loaded with all 0s.
Digital Feedthrough
1
1
nV s typ
Measured with input code transitions of all 0s to all 1s.
Output Noise Voltage Density
(30 Hz to 50 kHz)
15
15
nV/
√Hz typ Measured between R
FB A and OUT A or between
RFB B and OUT B.
Total Harmonic Distortion
–91
–91
dB typ
VIN A = VIN B = 6 V rms at 1 kHz. DAC
Registers loaded with all 0s.
NOTES
1Guaranteed by design, not production tested.
Specifications subject to change without notice.
(VDD = +5 V
5%; 0UT A = OUT B = AGND = DGND = O V; VIN A = VIN B = 10 V)
(VDD = +5 V
5%; 0UT A = OUT B = AGND = DGND = 0 V; VIN A =
VIN B = 10 V. Output amplifier AD712 except where noted.)



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