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参数资料
| 型号： | MAX2121ETI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 14/19页 |
| 文件大小： | 0K |
| 描述： | IC RF L-BAND TUNER 28TQFN |
| 标准包装： | 2,500 |
| 功能： | 调谐器 |
| 频率： | 925MHz ~ 2.175GHz |
| RF 型： | L 频带 |
| 次要属性： | 直接转换 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
Complete Direct-Conversion L-Band Tuner
Table 13. Test Register (Address: 0x0B)
BIT NAME
CPTST[2:0]
X
TURBO
LDMUX[2:0]
BIT LOCATION (0 = LSB)
7 –5
4
3
2 –0
DEFAULT
000
X
1
000
FUNCTION
Charge-pump test modes.
000 = Normal operation (default).
Don ’t care.
Charge-pump fast lock.
Users must program to 1 after powering up the device.
REFOUT output.
000 = Normal operation; other values are not tested.
Table 14. Status Byte-1 Register (Address: 0x0C)
BIT NAME
POR
VASA
VASE
LD
X
BIT LOCATION (0 = LSB)
7
6
5
4
3 –0
FUNCTION
Power-on reset status.
0 = Chip status register has been read with a stop condition since last power-on.
1 = Power-on reset (power cycle) has occurred. Default values have been loaded in
registers.
Indicates whether VCO autoselection was successful.
0 = Indicates the autoselect function is disabled or unsuccessful VCO selection.
1 = Indicates successful VCO autoselection.
Status indicator for the autoselect function.
0 = Indicates the autoselect function is active.
1 = Indicates the autoselect process is inactive.
PLL lock detector. TURBO bit must be programmed to 1 for valid LD reading.
0 = Unlocked.
1 = Locked.
Don ’t care.
Table 15. Status Byte-2 Register (Address: 0x0D)
BIT NAME
VCOSBR[4:0]
ADC[2:0]
BIT LOCATION (0 = LSB)
7 –3
2 –0
VCO band readback.
VAS ADC output readback.
000 = Out of lock.
001 = Locked.
010 = VAS locked.
FUNCTION
101 = VAS locked.
110 = Locked.
111 = Out of lock.
14
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