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参数资料
型号： AFE7222IRGCT
厂商： Texas Instruments
文件页数： 40/106页
文件大小： 0K
描述： IC AFE 12BIT 65/130MSPS 64VQFN
标准包装： 1
位数： 12
通道数： 4
功率（瓦特）： 610mW
电压 - 电源，模拟： 2.85 V ~ 3.6 V
电压 - 电源，数字： 1.7 V ~ 1.9 V
封装/外壳： 64-VFQFN 裸露焊盘
供应商设备封装： 64-VQFN 裸露焊盘（9x9）
包装： 标准包装
其它名称： 296-30113-6
AFE7222
AFE7225
www.ti.com
SLOS711B – NOVEMBER 2011 – REVISED MARCH 2012
Register Name – CONFIG81 – Address 0x179, Default = 0x00 (Synced)
<7>
<6>
<5>
<4>
<3>
<2>
<1>
<0>
RX_NCO_PHASE_OFF(7:0)
RX_NCO_PHASE_OFF(7:0) – This is the Phase offset added to the NCO accumulator just before the
generation of the SIN and COS values.
Register Name – CONFIG82 – Address 0x17A, Default = 0x00
<7>
<6>
<5>
<4>
<3>
<2>
<1>
<0>
PWR_MTR_COARSE_SAMPLES(2:0)
RX_MIXER_EN
RX_MIXER_GAIN(1:0)
RX_MIXER_GAIN(1:0) – This specifies the gain to be applied to the mixer output to prevent it from
saturating.
VALUE
GAIN
0
-2.5 dB
1
-6 dB
2
0 dB
3
0 dB
RX_MIXER_EN – This enables the Full mixer, which also causes the NCO to be enabled.
PWR_MTR_COARSE_SAMPLES(2:0) – Specifies the number of samples, ‘N’ over which power is to be
computed when the power meter is configured in the coarse mode. Keeps refreshing every ‘N’ samples
but writes to serial interface register only when serial clock is available – which requires a write to this
page. Stops refreshing once you get into readout mode.
VALUE
NUMBER OF SAMPLES
0
16
1
32
2
64
3
128
4
256
5
512
6
1024
7
16
Register Name – CONFIG83 – Address 0x17B, Default = 0x00
<7>
<6>
<5>
<4>
<3>
<2>
<1>
<0>
PWR_MTR_
RX_NCO_
RX_NCO_SER_
RX_NCO_
SYNC_DIS
SYNC_SRC
SER_IF_SYNC
SYNC_NEEDED
SYNC_DIS
SYNC_SOURCE
IF_SYNC
SYNC_
NEEDED
RX_NCO_SYNC_NEEDED – Specifies if syncing is needed for RX NCO. If set , NCO Frequency and
Offset words programmed into the serial interface registers are not applied to the NCO until a sync is
applied
RX_NCO_SER_IF_SYNC – A rising edge on this bit is used as the sync source for RX NCO. This is
applicable
when
RX_GLOBAL_SYNC_DIS
is
set,
and
RX_NCO_SYNC_DIS
is
cleared,
and
RX_NCO_SYNC_SRC specifies serial interface bit to be the sync source for the NCO.
RX_NCO_SYNC_SRC – Specifies the sync source for RX NCO. When cleared, SYNC pin is used as the
sync source. When set, a rising edge on serial interface bit RX_NCO_SER_IF_SYNC is used as the sync
source for RX NCO. This is applicable when RX_GLOBAL_SYNC_DIS is set
RX_NCO_SYNC_DIS
–
Disables
Syncing
of
the
RX
NCO
.This
takes
effect
only
when
RX_GLOBAL_SYNC_DIS is set
Copyright 2011–2012, Texas Instruments Incorporated
REGISTER DESCRIPTIONS
39
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Product Folder Link(s): AFE7222 AFE7225
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