SWRS273C November 2021 – July 2024 AWR2944
PRODUCTION DATA
Table 6-1 describes the four required power rails which must be provided to the AWR294x from an external power supply. In the case when 1.8V LVCMOS IO is utilized, VIOIN is powered from a 1.8V rail and the 3.3V rail can be ommited, so only three rails must be provided. Also, depending on the power topology utilized, additional power supply filtering can be required for the RF 1.0V and baseband, clock and VCO 1.8V supplies to meet the required ripple specifications. This additional filtering results in separate supply power nets being generated from these four basic rails.
SUPPLY VOLTAGE | DEVICE BLOCKS POWERED FROM THE SUPPLY | DEVICE POWER NETS |
---|---|---|
1.8 V | Synthesizer and APLL VCOs, crystal oscillator, IF Amplifier stages, ADC, CSI2, LVDS, LVCMOS IO | Input: VDDA_18VCO, VDDA_18CLK, VDDA_18PM, VDDA_18BB, VIOIN_18CSI, VIOIN_18LVDS, VIOIN_18 LDO Output: VOUT_14SYNTH, VOUT_14APLL |
1.0V | Power Amplifier, Low Noise Amplifier, Mixers and LO Distribution | Input: VDDA_10RF2, VDDA_10RF1 |
3.3V (or 1.8V for 1.8V I/O mode) | LVCMOS IO | VIOIN |
1.2 V | Core Digital and SRAM | VDD, VDD_SRAM, VNWA |
1.7 V | Programming OTP eFuse (For secure devices) | VPP |
The 1.0V and 1.8V power supply ripple specifications are mentioned in Table 6-2 The spur and ripple levels have a dB to dB relationship, for example, a 1 dB increase in supply ripple leads to an approximately 1 dB increase in spur level. Values quoted are rms levels for a sinusoidal input applied at the specified frequency.
FREQUENCY (kHz) | Spur Level (dBc) | RF RAIL | VCO/IF RAIL |
---|---|---|---|
1V (µVRMS) | 1.8V (uVRMS) | ||
10 | -85 | 22 | 10990 |
100 | -95 | 8 | 1420 |
200 | -98 | 6 | 730 |
500 | -102 | 4 | 450 |
1000 | -105 | 3 | 300 |
2000 | -105 | 3 | 80 |
5000 | -105 | 3 | 60 |
10000 | -105 | 3 | 60 |
15000 | -105 | 2 | 40 |
20000 | -105 | 2 | 40 |
The LP87745-Q1 Power Management IC (PMIC) is recommended for an integrated AWR2E44 power solution. This cost and space optimized solution is designed to power the AWR2E44 radar sensor and its principal peripherals.
List of benefits when using LP87745-Q1 PMIC to power AWR2E44: