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PDF W3011 Data sheet ( Hoja de datos )
| Número de pieza | W3011 | |
| Descripción | 1 GHz Quadrature Modulator | |
| Fabricantes | Agere Systems | |
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Data Sheet
September 1999
W3011
1 GHz Quadrature Modulator
Features
+ Guaranteed performance at 2.7 V power supply
+ Output power of 3 dBm into 50 Ω load (single-
ended) with 3 V operation
+ Direct RF modulation with or without offset mixer
+ Automatic power control (APC) capability
+ Accurate 90° phase shifter for carrier
+ Double-balanced active mixers minimize carrier
feedthrough (origin offset)
+ Low-current sleep mode
Applications
+ PDC 800 and American digital cellular mobile
terminals
+ Cellular base stations
Description
The W3011 1 GHz Quadrature Modulator is a
monolithic integrated circuit that provides direct
modulation of an RF carrier by I & Q baseband
inputs. It is particularly suited for use in mobile and
handheld cellular telephones designed to the IS-136
(North American 824 MHz to 849 MHz), PDC
(Japan RCR-STD27 889 MHz to 958 MHz), and
other digital personal-communications standards.
The circuit block diagram is shown in Figure 1. From
two LO signals, LOL and LOH, the offset mixer
produces an internal LO signal, which prevents the
external VCOs from being pulled by the large
transmitted signal. The phase shifter splits the LO
signal into two carriers with 90° phase separation
and equal amplitude.
These signals are fed to the in-phase (I) and
quadrature-phase (Q) double-balanced mixers. The
resulting signals are summed and fed into the output
amplifier. This amplifier can provide 0 dBm linear
output power, minimum, into a 50 Ω load.
The output power can be attenuated up to 50 dB by
applying a control voltage to the APC input.
Nominally, the output power is at maximum
(+3 dBm) with VAPC > 2.2 V, and at minimum
(–50 dBm) with VAPC < 0.8 V.
A CMOS/TTL-compatible logic input allows the
device to be put into a powerdown mode in which
less than 10 µA of supply current is consumed.
BIAS AND CONTROL
VCC
ENABLE
GROUND
RFOUT
APC
I
–π/4
∑φ
+π/4
Q
Figure 1. Circuit Block Diagram
LOH IN
50 Ω
LOL IN
50 Ω
EXTERNAL FILTER
OR
DIRECT LO INPUT
1 page  
Data Sheet
September 1999
W3011
1 GHz Quadrature Modulator
Electrical Characteristics (continued)
Table 5. ac Specifications
Conditions unless otherwise noted: 2.7 ≤ VCC ≤ 3.3 Vdc; TA = 25 °C ± 3 °C; RL = 50 Ω, VAPC = 2.7 Vdc;
fRF = 900 MHz, fLOL = 130 MHz, fLOH = 1030 MHz, –15 dBm < PLOL, PLOH < –5 dBm;
I – I = 0.4 cos(2πt Ÿ 80 kHz), Q – Q = 0.4 cos(2πt Ÿ 80 kHz – π/2), Vbias of I, I , Q, and Q = 1.22 Vdc.
Parameter
Min Typ Max Unit
I&Q
I & Q Signal Path 0.5 dB Bandwidth
—5
— MHz
I & Q Input Resistance
— 200
—
kΩ
I & Q Input Capacitance to Ground
— 5 — pF
I & Q Input Differential Signal for Max Output
— 0.8 — Vp-p
Offset Mixer
LOL Input Impedance
LOH Input Impedance
— 50
— 50
—
—
Ω
Ω
LO Input Impedance (pins LC1, LC2)
— 480//1 —
Ω//pF
LOL Input IP3
— 10 — dBm
Modulation Accuracy (POUT = –1 dBm)
Carrier Suppression (POUT = –1 dBm)
— –35 –28 dBUSB
Carrier Suppression (entire usable APC range)
— — –26 dBUSB
Origin Offset (DQPSK inputs, all usable APC levels)
— — –23 dBc
Error Vector Magnitude (See Explanation of Error Vector Magnitude
(EVM) Testing section.)
— 2.5
5
%
Lower Sideband (LSB) Suppression (See Figure 3.)
— –43 –34 dBUSB
RF Output
Output Power (0.8 Vp-p differential or single-ended 80 kHz sine-wave
inputs to I and Q, with 90° between I and Q)
–1 3
— dBm
Adjacent Channel Suppression (0.282 Vrms differential I and Q inputs,
π/4 – DQPSK modulation, random data):
Per PDC (RCR STD-27):
±50 kHz, All Usable APC Levels
±100 kHz, All Usable APC Levels
±100 kHz, Max RF Output (APC > 2.2)
Per IS-136/IS-137 800 MHz Digital Mode:
±30 kHz, All Usable APC Levels
±60 kHz, All Usable APC Levels
— –65 –55
— — –62
— –75 –65
— –45 –36
— –60 –50
dBc
dBc
dBc
dBc
dBc
Noise Floor Suppression, FC ± >100 kHz
— –120 –112 dBc/Hz
APC (Automatic Power Control) Function
Range of Usable Output Power Control for Japan PDC (RCR STD-27),
from Max Power at APC = 2.7 V to Minimum APC Voltage Where
Requirements for ACP and Carrier Suppression Are Still Met Using
π/4 – DQPSK/α = 0.5 Modulation at 0.282 Vrms Differential I and Q
Inputs:
Offset Mixer Not Used
Offset Mixer Used
29 40
39 45
—
—
dB
dB
Output Power Variation Due to Temperature, within Usable Control Range —
4
6
dB
RF Power Change Time (after APC change)
——
2
µs
APC Voltage for Max Output Power
— 2.2
—
Vdc
APC Voltage for Min Output Power
— 0.8
—
Vdc
Lucent Technologies Inc.
5
5 Page 
Data Sheet
September 1999
W3011
1 GHz Quadrature Modulator
Package Outline
20-Pin TSSOP
Dimensions are in millimeters.
1.00
10 1
1.00
0.19/0.30
0.22
± 0.03
1.00
6.25/6.5
WITH PLATING
0.090/0.135
0.090/0.20
11
DETAIL B
20
0.65 BSC
0.254 M E M
BASE METAL
DETAIL C
1.10
MAX
0.90 ± 0.05
SEE DETAIL A
6.50 ± 0.10
0.15
MAX
1
0.076 C
SEATING
PLANE
4.3/4.5
-E-
0.090/0.20
0.25 BSC
8
0.60 ± 0.10
DETAIL A
SEE DETAIL C
DETAIL B
5-5499
Lucent Technologies Inc.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet W3011.PDF ] | |
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