Texas Instruments TRF3722 EVM, Manual

Page: 48 / 69

48
TRF3722
SLWS245B – MAY 2014 – REVISED FEBRUARY 2017 www.ti.com
Product Folder Links: TRF3722
Submit Documentation Feedback
Copyright © 2014–2017, Texas Instruments Incorporated
Table 11. Register 5
Register 5 Bit Name Reset Value Description
Bit0 ADDR<0> 1
Register Address Bits
Bit1 ADDR<1> 0
Bit2 ADDR<2> 1
Bit3 ADDR<3> 1
Bit4 ADDR<4> 0
Bit5 RSV 0 Reserved
Bit6 IB_MOD_GM<0> 0
Adjust modulator bias current gm
Bit7 IB_MOD_GM<1> 1
Bit8 IB_MOD_LO<0> 0
Adjust modulator BB and LO bias current
Bit9 IB_MOD_LO<1> 1
Bit10 VCO_BIAS<0> 0
Adjust VCO bias reference current
Bit11 VCO_BIAS<1> 0
Bit12 VCO_BIAS<2> 0
Bit13 VCO_BIAS<3> 1
Bit14 VCOBUF_BIAS<0> 0
Adjust VCO buffer reference current
Bit15 VCOBUF_BIAS<1> 1
Bit16 VCOMUX_BIAS<0> 0
Adjust VCO Mux reference current
Bit17 VCOMUX_BIAS<1> 1
Bit18 OUTBUF_BIAS<0> 0
Adjust output buffer current
Bit19 OUTBUF_BIAS<1> 1
Bit20 RSV 0
Reserved
Bit21 RSV 1
Bit22 VCO_CAL_IB 0 Bias current for CAL reference voltage: [0] = PTAT, [1] = Constant
Bit23 VCO_CAL_REF<0> 0
VCO calibration reference voltage adjustment
[000] = 0.9 V, [111] = 1.4 V
[011] = recommended = 1.11 V
Bit24 VCO_CAL_REF<1> 0
Bit25 VCO_CAL_REF<2> 1
Bit26 VCO_AMPL_CTRL<0> 0
Adjusts the signal level at the VCO_MUX input:
[00] =max, [11] = min
Bit27 VCO_AMPL_CTRL<1> 1
Bit28 VCO_VB_CTRL<0> 0
Adjusts the VCO core bias voltage:
[00] = 1.2 V, [01] = 1.35 V, [10] = 1.5 V, [11] = 1.65 V
Bit29 VCO_VB_CTRL<1> 1
Bit30 RSV 0 Reserved
Bit31 EN_LD_MON_ISOURCE 1
Enable monitoring of LD to turn on Isource; recommend [0] =
Isource ctrl