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AD7011 bảng dữ liệu(PDF) 2 Page - Analog Devices

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Giải thích chi tiết về linh kiện  CMOS, ADC p/4 DQPSK Baseband Transmit Port
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AD7011 bảng dữ liệu(HTML) 2 Page - Analog Devices

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REV. B
–2–
AD7011–SPECIFICATIONS1(V
AA = VDD = +5 V
10%; Test = AGND = DGND = 0 V; Digital Mode,
fMCLK = 3.1104 MHz; Analog Mode, fMCLK = 2.56 MHz, POWER = VDD. All specifications are TMIN to TMAX unless otherwise noted.)
Parameter
AD7011ARS
Units
Test Conditions/Comments
DIGITAL MODE TRANSMIT SPECIFICATIONS
Number of Channels
2
(ITx – ITx) and (QTx – QTx)
Output Signal Range
VREF + VREF/4
Volts
For Each Analog Output
Differential Output Range
+VREF/2
Volts
I Channel = (ITx – ITx) and
Q Channel = (QTx – QTx)
Signal Vector Magnitude
2
0.875
± 7.5%
Volts max
Measured Differentially
Error Vector Magnitude2
1
% rms typ
2.5
% rms max
Offset Vector Magnitude
2
0.5
% typ
2.5
% max
IS-54 Spurious Power
2, 3
@ 30 kHz
–35
dB typ
–30
dB max
@ 60 kHz
–70
dB typ
–65
dB max
@ 90 kHz, 120 kHz
–75
dB typ
–70
dB max
ANALOG MODE SPECIFICATIONS
No. of Channels
2
(ITx – ITx) and (QTx – QTx)
Resolution
10
Bits
Output Signal Range
VREF ± VREF/3
Volts
For Each Analog Output
Differential Output Range
±2V
REF/3
Volts
I Channel = (ITx – ITx) and
Q Channel = (QTx – QTx)
DAC Update Rate
160
kHz
MCLK/16; fMCLK = 2.56 MHz
SNR
60
dB typ
Generating a 10 kHz Sine Wave
55
dB min
Differential Offset Error
±15
mV max
Post Calibration
Group Delay Matching Between I & Q Outputs
30
ns typ
Coding
Twos Complement
Maximum and Minimum DAC Codes
4
+450/–450
max/min
REFERENCE & CHANNEL SPECIFICATIONS
Reference, VREF
2.46
Volts
Reference Accuracy
±5%
I and Q Gain Matching
±0.2
dB max
Measured @ 10 kHz
Power-Down Option
Yes
Power = 0 V
LOGIC INPUTS
VINH, Input High Voltage
VDD – 0.9
V min
VINL, Input Low Voltage
0.9
V max
IINH, Input Current
10
FA max
CIN, Input Capacitance
10
pF max
LOGIC OUTPUTS
VOH Output High Voltage
VDD – 0.4
V min
|IOUT|
≤ 40 µA
VOL Output Low Voltage
0.4
V max
|IOUT|
≤ 1.6 mA
POWER SUPPLIES
VDD
4.5/5.5
V min/V max
IDD
Transmit Section Active
8
mA max
POWER = VDD
6
mA typ
Transmit Section Powered Down
5
35
µA max
MCLK Active
5
µA max
MCLK Inactive
NOTES
1Operating temperature ranges as follows: A Version: –40
°C to +85°C.
2See terminology.
3Measured in continuous transmission and Burst Mode with the I and Q channels ramping up and down at the beginning and end of a burst.
4Headroom must be allowed for the transmit DACs such that offsets in I & Q transmit channels can be calibrated out. Therefore, the full range of the I and Q DACs
are not available to the user. The user should ensure that binary codes greater than or less than the maximum or minimum are not loaded into the I or Q DACs.
5Measured while the digital inputs to the transmit interface are static and equal to 0 V or V
DD.
Specifications subject to change without notice.


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