BGX7101 データシートの表示（PDF） - NXP Semiconductors.

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BGX7101

Transmitter IQ modulator

NXP Semiconductors. 

NXP Semiconductors

BGX7101

Transmitter IQ modulator

Table 2. Pin description …continued

Symbol

Pin

Type[1] Description

i.c.

23

-

internally connected; to be tied to ground

VCC_LO(5V0)

24

P

Exposed die -

G

pad

LO analog power supply 5 V

exposed die pad; must be connected to RF ground

[1] G = ground; I = input; O = output; P = power.

[2] AC coupling required as shown in Figure 4 “Typical wideband application diagram”.

8. Functional description

8.1 General

Each IQ baseband input has a 100  differential input impedance allowing straightforward

matching, from the DAC output through the baseband filter. The device allows operation

with IQ input common-mode voltages between 0.25 V and 3.3 V allowing direct

connection to a broad family of DACs. The LO and RF ports provide broadband 50 

termination to RF source and loads.

The chip can be placed in inactive mode (see Section 8.2 “Shutdown control”).

8.2 Shutdown control

Table 3. Shutdown control

Mode Mode description

Idle

modulator fully off; minimal supply current

Active modulator active mode

Functional description

shutdown enabled

shutdown disabled

POFF_P

> 1.5 V

< 0.5 V

The modulator can be placed into inactive mode by the voltage level at power-up disable

pin (pin 1, POFF_P). The time required to pass between active and low-current states is

less than 1 s.

The shutdown feature of IQ modulator during switching does not induce any unlock of the

LO synthesizer in base station application thanks to the low impedance variation of the LO

input.

The graph (see Figure 3) describes the impact on LO impedance variation during the

switching time.

BGX7101

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 5 — 25 January 2017

© NXP B.V. 2017. All rights reserved.

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