LMX8410L 是一款具有集成 LO 和 IF 放大器的高性能宽带(射频输入为 4 至 10GHz)I/Q 解调器。在 IIP3 为 28dBm 而 NF 为 15dB(频率均为 5GHz)的情况下,该器件可提供出色的动态范围,适用于高性能 应用中使用 DP83869。该器件可提供 2.7GHz 的大型复杂带宽,适用于高数据速率 应用。
LMX8410L 提供自动直流失调电压校正算法,可将失调电压降至 ±2mV 以下。使用 SPI 接口可以精确控制 I 和 Q 通道的增益和相位,从而实现高镜像抑制。
LMX8410L 具有高度集成度,可提供高性能,同时还能节省布板空间并降低复杂性。它集成了宽带射频输入平衡-非平衡变压器,因此无需外部平衡-非平衡变压器。它集成了高性能 PLL 和 VCO,因此无需外部 LO 和 LO 驱动器。该器件还集成了一个 IF 放大器和几个低噪声 LDO,进一步简化了电路板。
LMX8410L 集成了一个极低噪声的合成器,PLL FOM 为 –236dBc/Hz,在 5GHz 载波条件下提供高达 56.5dBc 的 DSB 集成噪声。LO 允许跨多个器件进行相位同步。高性能合成器输出可用于驱动另一级或数据转换器。对于共享外部 LO 的 应用 ,可以旁路掉集成的 LO。
器件型号 | 封装 | 封装尺寸(标称值) |
---|---|---|
LMX8410L | VQFN (48) | 7.00mm × 7.00mm |
Changes from * Revision (March 2018) to A Revision
PIN | I/O | DESCRIPTION | |
---|---|---|---|
NAME | NAME | ||
1 | CE | Input | Chip Enable input. Active HIGH powers on the device. 1.8V to 3.3V logic. |
2 | VBIAS_VCO2 | Bypass | VCO bias. Requires connecting 10-µF capacitor to VCO ground. Place close to pin. If using external LO, this pin should either be floated or configured the same way as internal LO mode. |
3 | VBIAS_VCO1 | Bypass | VCO bias. Requires connecting 10-µF capacitor to VCO ground. Place close to pin. If using external LO, this pin should either be floated or configured the same way as internal LO mode. |
4 | GND | Ground | VCO ground. VBIAS pin capacitors must bypass to this point. |
5 | SYNC | Input | Trigger pin for synchronizing multiple devices. If using external LO, tie this pin to GND. |
6 | GND | Ground | Digital ground. VCC_DIG bypass capacitors must bypass to this point. |
7 | VCC_DIG | Supply | Digital supply. TI recommends connecting 0.1-µF capacitor to digital ground. |
8 | OSCINP | Input | Reference input clock (+). High input impedance. Requires connecting series capacitor (0.1 µF recommended). If using external LO, tie this pin to GND. |
9 | OSCINM | Input | Reference input clock (–). High input impedance. Requires connecting series capacitor (0.1 µF recommended). If using external LO, tie this pin to GND. |
10 | VREG_OSCIN | Bypass | Internal LDO output. Requires connecting 1-µF capacitor to digital ground. Place close to pin. If using external LO, this pin should either be floated or configured the same way as internal LO mode. |
11 | MUXOUT | Output | Readback or lock detect output. Pin mode configured by internal register settings. |
12 | VCC_CP | Supply | Charge pump supply. TI recommends connecting 0.1 µF and 100 pF to charge pump ground. Place close to pin. This pin must be connected to VCC, even if using external LO. |
13 | CP | Output | Charge pump output. TI recommends connecting C1 of loop filter close to pin. If using external LO, this pin should either be floated or configured the same way as internal LO mode. |
14 | GND | Ground | Charge pump ground. VCC_CP bypass capacitors must bypass to this point. |
15 | GND | Ground | MASH engine ground. VCC_MASH bypass capacitors must bypass to this point. |
16 | VCC_MASH | Supply | MASH engine supply. TI recommends connecting 0.1 µF and 100 pF to MASH engine ground. Place close to pin. This pin must be connected to VCC, even if using external LO. |
17 | LO_M | Input/Output | Internal LO differential output (–) or external LO differential input (–). In differential output mode, requires connecting 50-Ω resistor pullup to VCC as close as possible to pin. In differential input mode, remove the pull up resistors or inductors. The input should be capacitively coupled with internal biasing. See LO Interface for more information. |
18 | LO_P | Input/Output | Internal LO differential output (+) or external LO differential input (+). In differential output mode, requires connecting 50-Ω resistor pullup to VCC as close as possible to pin. In differential input mode, remove the pull up resistors or inductors. The input should be capacitively coupled with internal biasing. See LO Interface for more information. |
19 | VCC_BUF | Supply | LO buffer supply. TI recommends connecting 0.1 µF and 100 pF to VCO ground. This pin must be connected to VCC, even if using external LO. |
20 | GND | Ground | IF amplifier Q-channel ground. Q-channel VCC5 bypass capacitors must bypass to this point. |
21 | IF_QM | Output | IF amplifier Q-channel differential output (–). TI recommends connecting series 50-Ω resistor close to pin. |
22 | IF_QP | Output | IF amplifier Q-channel differential output (+). TI recommends connecting series 50-Ω resistor close to pin. |
23 | VCC5_IFQ | Supply | IF amplifier Q-channel 5-V supply. TI recommends connecting 0.1 µF and 100 pF to IF amplifier Q-channel ground. Place close to pin. |
24 | SCK | Input | SPI clock signal. High impedance CMOS input. 1.8-V to 3.3-V logic. |
25 | SDI | Input | SPI data signal. High impedance CMOS input. 1.8-V to 3.3-V logic. |
26 | CSB | Input | SPI chip select signal. High impedance CMOS input. 1.8-V to 3.3-V logic. |
27 | VCC_IFQ | Supply | IF mixer Q-channel supply. TI recommends connecting 0.1 µF and 100 pF to digital ground. |
28 | NC | N/A | No connect. Pin is not internally connected and may be floated or shorted to other nodes. |
29 | VCC_RFQ | Supply | RF Q-channel supply. TI recommends connecting 0.1 µF and 100 pF to digital ground. |
32 | GND | Ground | RF input path ground. |
31 | RF | Input | RF input. Single-ended. Must be AC coupled. |
32 | GND | Ground | RF input path ground. |
33 | VCC_RFI | Supply | RF I-channel supply. TI recommends connecting 0.1 µF and 100 pF to digital ground. |
34 | GND | Ground | Should be connected IF ground. |
35 | VCC_IFI | Supply | IF mixer I-channel supply. TI recommends connecting 0.1 µF and 100 pF to digital ground. |
36 | VCM_IN | Input | Common-mode voltage input. When the VCM_CONFIG register is set to external (0xF), the voltage on this pin sets the common-mode voltage of the IF amplifiers. |
37 | NC | Ground | Connect this pin to IF ground. |
38 | VCC5_IFI | Supply | IF amplifier I-channel 5-V supply. TI recommends connecting 0.1 µF and 100 pF to IF amplifier I-channel ground. Place close to pin. |
39 | IF_IP | Output | IF amplifier I-channel differential output (+). TI recommends connecting series 50-Ω resistor close to pin. |
40 | IF_IM | Output | IF amplifier I-channel differential output (–). TI recommends connecting series 50-Ω resistor close to pin. |
41 | GND | Ground | IF amplifier I-channel ground. I-channel VCC5 bypass capacitors should bypass to this point. |
42 | VBIAS_VARAC | Bypass | VCO varactor bias. Requires connecting 10µF capacitor to VCO ground. If using external LO, this pin should either be floated or configured the same way as internal LO mode. |
43 | GND | Ground | VCO ground. Varactor bias bypass capacitor should bypass to this point. |
44 | VTUNE | Input | VCO tuning voltage input. If using internal LO, connect the output of the loop filter to this point. If using external LO, tie this pin to GND. |
45 | VREG_VCO | Bypass | VCO LDO output node. Requires connecting 10-µF capacitor to VCO ground. Place close to pin. This capacitor must be present even if used in external LO mode. |
46 | VCC_VCO | Supply | VCO supply. TI recommends connecting 0.1-µF and 100-pF capacitors to VCO ground. This pin must be connected to VCC, even if using external LO. |
47 | VREF_VCO | Bypass | VCO LDO reference node. Requires connecting 1-µF capacitor to VCO ground. If using external LO, this pin should either be floated or configured the same way as internal LO mode. |
48 | GND | Ground | VCO ground. VCO LDO, LDO reference, and supply bypass capacitors must bypass to this point. |
49 | PAD | Ground | Die attach pad. Internally connected to ground. TI recommends shorting ground pins to this pad on the same plane, if possible. |
MIN | MAX | UNIT | ||
---|---|---|---|---|
VCC | Power supply voltage, 3.3-V rail | –0.3 | 3.6 | V |
VCC5 | Power supply voltage, 5-V rail | –0.3 | 5.3 | V |
PD | Power dissipation | 5 | W | |
TJ | Junction temperature | –40 | 150 | °C |
Tstg | Storage temperature | –65 | 150 | °C |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins | 2500 | V |
Charged device model (CDM), per JEDEC specificationJESD22-C101, all pins | 500 |
MIN | NOM | MAX | UNIT | ||
---|---|---|---|---|---|
VCC | Power supply voltage, 3.3V rail | 3.15 | 3.3 | 3.45 | V |
VCC5 | Power supply voltage, 5V rail | 4.75 | 5 | 5.25 | V |
TA | Ambient temperature | –40 | 25 | 85 | °C |
TJ | Junction temperature | 125 | °C |