參數(shù)資料
型號(hào)： AD7013ARS
廠商： ANALOG DEVICES INC
元件分類(lèi)： 通信及網(wǎng)絡(luò)
英文描述： CMOS TIA IS-54 Baseband Receive Port
中文描述： SPECIALTY TELECOM CIRCUIT, PDSO28
封裝： SSOP-28
文件頁(yè)數(shù)： 9/20頁(yè)
文件大?。?/td> 591K
代理商： AD7013ARS
REV. A
AD7013
–9–
Register
Name
Address
A2
Register
Size
Reset
State
A3
A1
A0
Description
COMMAND
0
0
1
0
9 Bits
All Zeros
The COMMAND register is used to select various operating modes
of the AD7013. A detailed description of the COMMAND register
is given in Table II.
The VERNIER register allows additional group delay to be
introduced into the I and Q ADCs. This provides a means to vary
the ADC sampling instant.
The contents of the IRx OFFSET register are substracted from the
I channel ADC word. When autocalibration is selected, this register
is automatically loaded by the AD7013 at the beginning of
a normal operation. When user calibration is selected, this register
can be externally loaded with a twos complement offset 10-bit
word to be subtracted from subsequent ADC samples.
The contents of the QRx OFFSET register are substracted from
the Q channel ADC word. When auto calibration is selected, this
register is automatically loaded by the AD7013 at the beginning of
a normal operation. When user calibration is selected this register
can be externally loaded with a twos complement offset 10-bit
word to be subtracted from subsequent ADC samples.
The 10-bit auxiliary DAC current output is determined by this register.
The output current is equal to {AUX DAC1
FULL SCALE
* N/2
10
} where
N is the 10-bit word contained in the AUX DAC1 register and
AUX DAC1
FULL SCALE
is determined by the value of R
SET
connected
between FSADJUST and AGND.
The 8-bit auxiliary DAC current output is determined by this register.
The output current is equal to {AUX DAC1
FULL SCALE
* N/2
8
}
where N is the 8-bit word contained in the AUX DAC2 register
and AUX DAC2
FULL SCALE
is determined by the value of RSET
connected between FS ADJUST and AGND.
The 8-bit auxiliary DAC current output is determined by this register.
The output current is equal to {AUX DAC3
FULL SCALE
* N/2
8
}
where N is the 8-bit word contained in the AUX DAC3 register
and AUX DAC3
FULL SCALE
is determined by the value of R
SET
connected between FS ADJUST and AGND.
When this address in selected, all of the internal registers are initialized
to their reset state.
When this address is used, a special loading sequence, as shown in
Table IV, is used to write to any of the internal registers.
No Action.
No Action.
VERNIER
0
1
0
0
4 Bits
All Zeros
IRx OFFSET
0
1
0
1
10 Bits
All Zeros
QRx OFFSET
0
1
1
0
10 Bits
All Zeros
AUX DAC1
0
1
1
1
10 Bits
All Zeros
AUX DAC2
1
0
0
0
8 Bits
All Zeros
AUX DAC3
1
0
0
1
8 Bits
All Zeros
RESET
0
0
0
1
N/A
N/A
6-Bit LOAD
0
0
1
1
N/A
N/A
N/A
N/A
0
1
0
1
0
1
0
1
N/A
N/A
N/A
N/A
Table I. Description and Address Map for AD7013 Internal Registers
IRx OFFSET ADJUST
Rx SAMPLING VERNIER
AUX DAC1
AUX DAC2
QRx OFFSET ADJUST
AUX DAC3
DATA IN
A3 – A0
S1, S0
COMMAND REGISTER
6-BIT LOAD DATA BUFFER
DB9 – DB0
MSB
LSB
16-BIT SERIAL WORD
Figure 6. AD7013 Registers
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