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参数资料
| 型号： | MAX2112CTI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 11/19页 |
| 文件大小： | 0K |
| 描述： | IC TUNER DIR-CONV DVB-S2 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 频率： | 925MHz ~ 2.175GHz |
| 应用： | 数字 TV，CATV，机顶盒 |
| 电流 - 接收： | 100mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 电源电压： | 3.13 V ~ 3.47 V |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
MAX2112
Complete, Direct-Conversion
Tuner for DVB-S2 Applications
Table 8. PLL Register
BIT NAME
BIT LOCATION (0 = LSB) DEFAULT
VCO divider setting.
FUNCTION
D24
7
1
0 = Divide by 2. Use for LO frequencies ≥ 1125MHz.
1 = Divide by 4. Use for LO frequencies < 1125MHz.
Charge-pump current mode.
CPS
6
1
0 = Charge-pump current controlled by ICP bit.
1 = Charge-pump current controlled by VCO autoselect (VAS).
Charge-pump current.
ICP
5
0
0 = 600μA typical.
1 = 1200μA typical.
X
4–0
X
Don’t care.
Table 9. VCO Register
BIT NAME
BIT LOCATION (0 = LSB) DEFAULT
FUNCTION
VCO[4:0]
7–3
11001
Controls which VCO is activated when using manual VCO programming mode.
This also serves as the starting point for the VCO autoselection (VAS) mode.
VCO autoselection (VAS) circuit.
VAS
2
1
0 = Disable VCO selection must be programmed through I 2 C.
1 = Enable VCO selection controlled by autoselection circuit.
Enables or disables the VCO tuning voltage ADC latch when the VCO
ADL
1
0
autoselect mode (VAS) is disabled.
0 = Disables the ADC latch.
1 = Latches the ADC value.
Enables or disables VCO tuning voltage ADC read when the VCO autoselect
ADE
0
0
mode (VAS) is disabled.
0 = Disables ADC read.
1 = Enables ADC read.
Table 10. Lowpass Filter Register
BIT NAME
BIT LOCATION (0 = LSB) DEFAULT
FUNCTION
Sets the baseband lowpass filter 3dB corner frequency.
LPF[7:0]
Maxim Integrated
7–0
01001011 f -3dB = 4MHz + (LPF[7:0] dec - 12) x 290kHz.
Default value equates to f -3dB = 22.27MHz typical.
11
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