參數(shù)資料
型號: AFE7222IRGC25
廠商: Texas Instruments
文件頁數(shù): 35/106頁
文件大?。?/td> 0K
描述: IC AFE 12BIT 65/130MSPS 64VQFN
標準包裝: 1
位數(shù): 12
通道數(shù): 4
功率(瓦特): 610mW
電壓 - 電源,模擬: 2.85 V ~ 3.6 V
電壓 - 電源,數(shù)字: 1.7 V ~ 1.9 V
封裝/外殼: 64-VFQFN 裸露焊盤
供應商設備封裝: 64-VQFN 裸露焊盤(9x9)
包裝: 標準包裝
其它名稱: 296-30067-6
INP_A_ADC
S
e
ri
a
l
L
V
D
S
o
r
P
a
ra
ll
e
l
C
M
O
S
12b
RX ADC B
12b
TX DAC A
12b
TX DAC B
IOUTP_A_DAC
12b
RX ADC A
INN_A_ADC
INP_B_ADC
INN_B_ADC
IOUTN_A_DAC
IOUTP_B_DAC
IOUTN_B_DAC
12-bit ADC
Output
R
X
D
IG
IT
A
L
S
IG
N
A
L
C
H
A
IN
T
X
D
IG
IT
A
L
S
IG
N
A
L
C
H
A
IN
S
e
ri
a
l
L
V
D
S
o
r
P
a
ra
ll
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C
M
O
S
12-bit DAC
Input
M
U
X
M
U
X
SLOS711B – NOVEMBER 2011 – REVISED MARCH 2012
Register Name – CONFIG61 – Address 0x165, Default = 0x00
<7>
<6>
<5>
<4>
<3>
<2>
<1>
<0>
TX_RX_LPBK_
TX_RX_LPBK
RX_DECB_MODE
RX_DECA_MODE
RX_DEC_FIL_
SRC
EN_SRC
EN
RX_DEC_FIL_EN – Enables the decimation filter in the RX path in both the A and B channels. Set
RX_DEC_FIL_EN_SRC for this to take effect. Output clock automatically set to 0.5X.
RX_DEC_FIL_EN_SRC – When set, this allows RX_DEC_FIL_EN to take effect.
RX_DECA_MODE – When set, configures the decimation filter in Channel A in high pass mode. By
default, the filter is in low pass mode.
RX_DECB_MODE – When set, configures the decimation filter in Channel B in high pass mode. By
default, the filter is in low pass mode.
TX_RX_LPBK – When this bit and TX_Rx_LPBK_SRC are both set , the input to the RX signal chain is
tapped from the the final output of the TX signal chain.
TX_Rx_LPBK_SRC – When this bit and TX_RX_LPBK are both set , the input to the RX signal chain is
tapped from the the final output of the TX signal chain.
The TX to RX loopback is illustrated below. The dotted arrows show the loopback mode.
Figure 5-4. Signal Chain
Register Name – CONFIG62 – Address 0x166, Default = 0x00
<7>
<6>
<5>
<4>
<3>
<2>
<1>
<0>
RX_DIV_PHASE_INV
RX_DIV_PHASE
RX_CMIX_PHASE(1:0)
RX_CMIX_PHASE_
RX_CMIX_MODE(1:0)
RX_CMIX_EN
INCR
RX_CMIX_EN – Enables the RX Coarse mixer.
RX_CMIX_MODE(1:0) – Specifies the mode in which the RX Coarse mixer is configured . Set
RX_CMIX_EN for this to take effect.
VALUE
MIXING MODE
0
Normal(Low pass )
1
Fs /2 (High Pass )
2
+ Fs/4
3
– Fs/4
34
REGISTER DESCRIPTIONS
Copyright 2011–2012, Texas Instruments Incorporated
Product Folder Link(s): AFE7222 AFE7225
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