PMB2208R ,Mixer and IF Vector ModulatorICs for CommunicationsMixer and IF Vector ModulatorPMB 2208 Version 1.2Preliminary Specification 10 ..
PMB2306T ,PLL-Frequency SynthesizerICs for CommunicationsPLL-Frequency SynthesizerPMB2306R/PMB2306T Version 2.2Data Sheet 02.97T2306-0 ..
PMB2306T ,PLL-Frequency SynthesizerFeatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
PMB2306T ,PLL-Frequency SynthesizerBlock Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 &L ..
PMB2306T ,PLL-Frequency Synthesizercharacteristics.Terms of delivery and rights to change design reserved.For questions on technology, ..
PMB2314 ,Prescaler Circuit 2.1 GHzData Sheet, Version 1.2, December 2003Prescaler Circuit 2.1 GHzPMB 2314TVersion 1.5Wireless Infrast ..
PSD402A2-C-90UI ,Low Cost Field Programmable Microcontroller PeripheralsTable of Contents9.4.3 Memory Select Map.....619.4.4 Memory Select Map for 8031 Application........ ..
PSD403A1-C-90JI ,Low Cost Field Programmable Microcontroller PeripheralsFeatures........439.2.6 Bus Interface Examples........439.3 I/O Ports......489.3.1 Standard MCU I/O ..
PSD411A2-C-90JI ,Low Cost Field Programmable Microcontroller PeripheralsFEATURES SUMMARY
PMB2208R
Mixer and IF Vector Modulator
ICs for Communications
Mixer and IF Vector Modulator
PMB 2208 Version 1.2
Preliminary Specification10.97
Revision History
PMB 2208
Table of ContentsPageOverview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.1Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.3Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.4Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.5Pin Definitions and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.6Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
1.7Circuit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
1.8Internal Input/Output Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
2.1Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
2.2Operational Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.3AC/DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2.4S-Parameter and Input/Output Impedances . . . . . . . . . . . . . . . . . . . . . . . . .18
2.4.1Mixer Input RF/RFX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
2.4.2Mixer Input IF/IFX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
2.4.3Mixer Output MO/MOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
2.5Test Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
2.6Application Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Mixer and IF Vector Modulator
PMB 2208Overview
1.1FeaturesDirect quadrature modulator and up/down-
conversion mixer on one chipModulator:LO input frequency range from 200MHz to
550MHz corresponds to an output frequency
range from 100MHz to 275MHzGeneration of orthogonal carriers without
external elements and without trimmingtyp. 48dB carrier suppression with 1Vpp baseband leveltyp. 49dB SSB suppression with 1Vpp baseband leveltyp. 51dB rejection of third-order intermodulation products with 1Vpp baseband levelLow output noise floorMixer:Double-balanced Gilbert cellRF and IF frequency range from DC to 2.5GHztyp 39dB carrier suppressionLow noiseSupply voltage range from 2.7 to 4.5VPower-down modeP-TSSOP-24 packageTemperature range -30 to 85°C
1.2ApplicationsVector-modulated digital mobile cellular systems, such as GSM, PDC-800, PDC-1.5,
PHS, DAMPS, DCS1800, WLAN, etc.Various modulation schemes, such as PM, PSK, FSK, QAM, QPSK, GMSK, etc.Analog systems with FM and AM modulationSpace- and power-saving optimizations of existing discrete transmitter circuits
PMB 2208
1.3Functional DescriptionThe PMB 2208 contains a direct quadrature modulator and an up/down-conversion
mixer with corresponding bias circuitry.
The modulator splits the signal at the LO/LOX input into two orthogonal carriers. The
frequency of these carriers is half of the LO/LOX input frequency. The carriers are
multiplied with the baseband modulation signals at the A/AX and B/BX inputs. The
outputs of the multipliers are added and amplified by a linear output stage. The
modulated signal is available at the E/EX output. A reference voltage is available at the
TREF output, which can be used to bias the baseband inputs.
The mixer combines the signals at the RF/RFX and IF/IFX inputs; the resulting signal is
available at the MO/MOX output. The IF/IFX input is suitable for the lower-frequency
signal because of its linear transfer function to the output. The higher-frequency signal
is applied to the RF/RFX input, which operates in switched mode. In a typical application,
the output signal of the modulator is band-pass filtered and then fed to the IF/IFX input
of the mixer.
The modulator and mixer have separate power supplies, and can be powered down
independently. The power-down concept enables the modulator to be used with or
without the mixer.
PMB 2208
1.4Pin Configuration(top view)
PMB 2208
1.5Pin Definitions and Functions
PMB 2208
1.6Functional Block Diagram
PMB 2208
1.7Circuit DescriptionThe modulator performs a direct quadrature modulation. The LO signal is connected to
an emitter-coupled transistor pair. The LO signal is split internally into two orthogonal
carriers at half of the LO/LOX input frequency. The accuracy of the internal 90° phase
shift requires a balanced input signal and depends on the accuracy of the 50% duty cycle
of the LO/LOX signal. The modulator has two Gilbert cell mixers, in which the baseband
modulation signals at the A/AX and B/BX inputs are multiplied with the orthogonal
carriers. The outputs of the two Gilbert cells are added and amplified by a linear output
stage. The modulated transmit signal is available at the high-impedance, open-collector
output E/EX. It can be band-pass filtered and fed to the IF/IFX input of the mixer.
At the TREF output, a reference voltage is available, which should be capacitively
decoupled to ground. TREF can be used to set the DC bias of the baseband inputs using
external resistors. Alternatively, the DC level can be set independently of TREF,
provided it is within the specified operational range.
The up/down-conversion mixer is a fully-balanced Gilbert cell. The transfer function from
the low-impedance emitter input IF/IFX to the output is linear for input levels below the
1dB compression point. For improved intermodulation, the mixer current can be
increased with external resistors to ground at IF/IFX. The high-impedance input RF/RFX
is directly connected to the bases of the switching transistors. The input level should be
high enough to ensure proper switching. The output signal of the mixer is available at the
high-impedance, open-collector outputs MO/MOX.
The modulator and the mixer have separate supply and power-down pins: VCC1, PD1
for the modulator and VCC2, PD2 for the mixer. Applying a logic LOW to PD1 or PD2
powers down the corresponding part of the chip, including its bias circuitry. Depending
on the application, the power-down pins can be combined or separately fixed to supply
rails.
PMB 2208
1.8Internal Input/Output Circuits
PMB 2208Electrical Characteristics
2.1Absolute Maximum RatingsThe maximum ratings may not be exceeded under any circumstances, not even momentarily and
individually, as permanent damage to the IC will result.
* The RF pins 3, 4, 17 and 18 are not protected against voltage stress > 300V (versus VS or GND).
The high frequency performance prohibits the use of adequate protective structures.
PMB 2208
2.2Operational RangeWithin the operational range the IC operates as described in the circuit description.
The AC/DC characteristic limits are not guaranteed.
Supply voltage VCC = 2.7 to 4.5V, ambient temperature TA = -30 to 85°C
Note:Power levels are referred to an impedance of 50Ω.
Control inputs PD1, PD2
Mixer
Modulator
