32
35
33
42
LD
BBQ_P
BBQ_N
RFOUT
VCC
VTUNE
BBI_P
NC
GND
PD RDBK
EXT_VCO BBI_N
1
2
3
8
1
0
44
45
46
47
48
39
40
41
43
37
38
23
3
6
3
4
30
2
9
2
8
2
7
26
2
5
DATA
CP_OUT
LO_OUTP
CLK
LO_OUTN
REFIN
LE
18
PFD
Charge
Pump
LO Div
6
SDM
2
4
1
3
1
2 6
2
2
21
16
14
2
0
1
9
1
7
1
5
9
4
1
1
7
5
GND
TX Div
Pre
Scaler
N Div
PLL Div
R Div
3
1
0
O
90
O
Serial Interface
VCC_TK
35
SLWS245B – MAY 2014 – REVISED FEBRUARY 2017
Product Folder Links:
Copyright © 2014–2017, Texas Instruments Incorporated
8 Detailed Description
8.1 Overview
TRF3722 integrates a high performance direct conversion quadrature modulator with exceptional linearity and
low noise performance. The modulator which upconverts low frequency baseband signal to high frequency RF
typically operates at 0.25 V common mode. It supports seamless interface with current source DACs. It also
features high gain and low power operating modes. Additionally, TRF3722 integrates PLL and VCO to provide
the local oscillator (LO) to the integrated modulator. The PLL and VCO provides excellent phase noise and
extremely low spurious performance. The device also provides an LO output for driving another modulator or
mixer. TRF3722 supports the use of an external VCO or LO signal.
8.2 Functional Block Diagram
