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AD73322 数据表(PDF) 5 Page - Analog Devices

部件名 AD73322
功能描述  Low Cost, Low Power CMOS General-Purpose Dual Analog Front End
Download  43 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD73322 数据表(HTML) 5 Page - Analog Devices

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–5–
REV. B
AD73322
SPECIFICATIONS1
AD73322A
Parameter
Min
Typ
Max
Units
Test Conditions/Comments
REFERENCE
REFCAP
Absolute Voltage, VREFCAP
1.2
V
5VEN = 0
2.4
V
5VEN = 1
REFCAP TC
50
ppm/
°C 0.1 µF Capacitor Required from
REFOUT
REFCAP to AGND2
Typical Output Impedance
130
Absolute Voltage, VREFOUT
1.2
V
5VEN = 0, Unloaded
2.4
V
5VEN = 1, Unloaded
Minimum Load Resistance
2
k
5VEN = 1
Maximum Load Capacitance
100
pF
INPUT AMPLIFIER
Offset
±1.0
mV
Maximum Output Swing
3.156
V
Max Output Swing = (3.156/2.4)
× VREFCAP
Feedback Resistance
50
k
fC = 32 kHz
Feedback Capacitance
100
pF
ANALOG GAIN TAP
Gain at Maximum Setting
+1
Gain at Minimum Setting
–1
Gain Resolution
5
Bits
Gain Step Size = 0.0625
Gain Accuracy
±1
%
Output Unloaded
Settling Time
1.0
µs
Tap Gain Change of –FS to +FS
Delay
0.5
µs
ADC SPECIFICATIONS
5VEN = 1
Maximum Input Range at VIN
2, 3
3.156
V p-p
Measured Differentially
3.17
dBm
Max Input Swing = (3.156/2.4)
× VREFCAP
Nominal Reference Level at VIN
2.1908
V p-p
Measured Differentially
(0 dBm0)
0
dBm
Absolute Gain
PGA = 0 dB
0.4
dB
1.0 kHz, 0 dBm0
PGA = 38 dB
–0.7
dB
1.0 kHz, 0 dBm0
Gain Tracking Error
±0.1
dB
1.0 kHz, +3 dBm0 to –50 dBm0
Signal to (Noise + Distortion)
Refer to Figure 7
PGA = 0 dB
78
dB
300 Hz to 3400 Hz; fSAMP = 64 kHz
78
dB
300 Hz to 3400 Hz; fSAMP = 8 kHz
57
dB
0 Hz to fSAMP/2; fSAMP = 64 kHz
PGA = 38 dB
56
dB
300 Hz to 3400 Hz; fSAMP = 64 kHz
Total Harmonic Distortion
PGA = 0 dB
–84
dB
300 Hz to 3400 Hz; fSAMP = 64 kHz
PGA = 38 dB
–70
dB
300 Hz to 3400 Hz; fSAMP = 64 kHz
Intermodulation Distortion
–65
dB
PGA = 0 dB
Idle Channel Noise
–71
dBm0
PGA = 0 dB
Crosstalk
ADC-to-DAC
–100
dB
ADC Input Signal Level: 1.0 kHz, 0 dBm0
DAC Input at Idle
ADC-to-ADC
–100
dB
ADC1 Input Signal Level: 1.0 kHz, 0 dBm0
ADC2 Input at Idle. Input Amplifiers Bypassed
–70
dB
Input Amplifiers Included in Channel
DC Offset
+10
mV
PGA = 0 dB
Power Supply Rejection
–65
dB
Input Signal Level at AVDD and DVDD
Pins: 1.0 kHz, 100 mV p-p Sine Wave
Group Delay
4, 5
25
µs
64 kHz Output Sample Rate
Input Resistance at PGA
2, 4, 6
20
k
Input Amplifiers Bypassed
(AVDD = +5 V
10%; DVDD = +5 V
10%; DGND = AGND = 0 V, fDMCLK = 16.384 MHz, fSAMP = 64 kHz;
TA = TMIN to TMAX, unless otherwise noted)


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