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AD7764 датащи(PDF) 6 Page - Analog Devices

номер детали AD7764
подробное описание детали  24-Bit, 312 kSPS, 109 dB Sigma-Delta ADC
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD7764 датащи(HTML) 6 Page - Analog Devices

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AD7764
Rev. A | Page 5 of 32
Parameter
Test Conditions/Comments
Specification
Unit
REFERENCE INPUT/OUTPUT
V
REF+ Input Voltage
AV
DD3 = 5 V ± 5%
4.096
V
V
REF+ Input DC Leakage Current
±1
µA max
V
REF+ Input Capacitance
5
pF typ
DIGITAL INPUT/OUTPUT
MCLK Input Amplitude
2.25 to 5.25
V
Input Capacitance
7.3
pF typ
Input Leakage Current
±1
μA/pin max
V
INH
0.8 × DV
DD
V min
V
INL
0.2 × DV
DD
V max
V
OH
4
2.2
V min
V
OL
0.1
V max
ON-CHIP DIFFERENTIAL AMPLIFIER
Input Impedance
>1
Bandwidth for 0.1 dB Flatness
125
kHz
Common-Mode Input Voltage
Voltage range at input pins: V
INA+ and VINA−
−0.5 to +2.2
V
Common-Mode Output Voltage
On-chip differential amplifier pins: V
OUTA+ and VOUTA−
2.048
V
POWER REQUIREMENTS
AV
DD1 (Modulator Supply)
±5%
2.5
V
AV
DD2 (General Supply)
±5%
5
V
AV
DD3 (Differential Amplifier Supply)
±5%
5
V min/max
AV
DD4 (Ref Buffer Supply)
±5%
5
V min/max
DV
DD
±5%
2.5
V
Normal Power Mode
AI
DD1 (Modulator)
19
mA typ
AI
DD2 (General)
5
MCLK = 40 MHz
13
mA typ
AI
DD3 (Differential Amplifier)
AV
DD3 = 5 V
10
mA typ
AI
DD4 (Reference Buffer)
AV
DD4 = 5 V
9
mA typ
DI
DD
5
MCLK = 40 MHz
37
mA typ
Low Power Mode
AI
DD1 (Modulator)
10
mA typ
AI
DD2 (General)
5
MCLK = 40 MHz
7
mA typ
AI
DD3 (Differential Amplifier)
AV
DD3 = 5 V
5.5
mA typ
AI
DD4 (Reference Buffer)
AV
DD4 = 5 V
5
mA typ
DI
DD
5
MCLK = 40 MHz
20
mA typ
POWER DISSIPATION
Normal Power Mode
MCLK = 40 MHz, decimate 64×
300
mW typ
371
mW max
Low Power Mode
MCLK = 40 MHz, decimate 64×
160
mW typ
215
mW max
Power-Down Mode6
PWRDWN
1
held logic low
mW typ
1 See the Terminology section.
2 SNR specifications in decibels are referred to a full-scale input, FS. Tested with an input signal at 0.5 dB below full scale, unless otherwise specified.
3 Output data rate (ODR) = [(MCLK/2)]/decimation rate. That is, the maximum ODR for AD7764 = [(40 MHz)/2)/64] = 312.5 kHz.
4 Tested with a 400 µA load current.
5 Tested at MCLK = 40 MHz. This current scales linearly with the MCLK frequency applied.
6 Tested at 125°C.


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