ETC PMB2220

PMB 2220
Version 2.2
1
Overview
Combined with a PLL (i.e. PMB 2306 or PMB 2307)
and a power amplifier, the PMB 2220 device performs
a complete DECT transmitter. Additionally, the phase
locked loop can be switched to receive mode and be
used as a local oscillator for the receive mixer.
P-SSOP-20-1
1.1
Features
• Either single VCO operation
(for receive and transmit)
or dual VCO operation (VCO1 for receive and
VCO2 for transmit) possible
• 64/65- prescaler on chip
• Frequency doubler for receive and transmit mode
with balanced driver outputs
• Supply voltage regulator (with external
pnp-transistor) for the two VCOs
• Power down for the inactive VCO
• Current reference output for PLL charge pump to get constant lock-in time
• Wide power supply range 3.0 ... 5.5 V, for 3 cell supply without external regulator
Type
Ordering Code
Package
PMB 2220
Q67000-A6079
P-SSOP-20-1
Semiconductor Group
1
08.95
PMB 2220
Overview
1.2
Pin Configuration
(top view)
P-SSOP-20-1
Semiconductor Group
2
PMB 2220
Overview
1.3
Pin Definitions and Functions
Pin No.
Symbol
Function
1
MOD
Prescaler modulus control input (divider ratio 1:64 or 1:65)
2
GND1
3
VCC1
Supply voltage 1 (prescaler)
4
PSRUN
Test input for prescaler
5
PA
Frequency doubler signal output
6
PAX
Inverted frequency doubler signal output
7
VCC2
Supply voltage 2 (bandgap and frequency doubler)
8
GND2
9
TXON
Control input for VCO power down
10
TXLOFF
System power down control input
11
VREF
Reference voltage for IREF-current generation with external
resistor to ground
12
Base current for external supply voltage regulating pnp-transistor
13
IREG
VCC3
14
LOB2
Base input of oscillator 2
15
LOE2
Emitter input of oscillator 2
16
LOE1
Emitter input of oscillator 1
17
LOB1
Base input of oscillator 1
18
GND3
19
IREF
Reference current for PLL charge pump
20
FI
Prescaler output
Semiconductor Group
Supply voltage 3 (regulated for VCO1 and VCO2)
3
PMB 2220
Overview
Figure 1
Block Diagram
Semiconductor Group
4
PMB 2220
Circuit Description
2
Circuit Description
VCO1, VCO2
The signal TXON determines which one of the VCOs is active: Receive mode VCO1 with
TXON logic LOW, transmit mode VCO2 with TXON logic HIGH. The other VCO is
powered down.
Both VCOs are emitter coupled configurations (pins LOB1, LOE1 and LOB2, LOE2) with
an external dielectric resonator connected to ground and a tuning diode in parallel.
During the transmit timeslots the modulation can be done at the anode, the PLL loop
being open.
The VCOs generate differential signals. Those of the active VCO are coupled to the
prescaler and the doubler via an isolation amplifier.
Supply Voltage Regulator for the VCOs
With an external pnp-transistor the supply voltage of both VCOs is stabilized to 2.7 V in
the specified general supply voltage range. This allows for a minimal frequency drift in
spite of a ripple on the chip supply voltage. The emitter of the external transistor must be
connected to VCC2.
Phase Shifter, Frequency Doubler
Frequency doubling of the active differential VCO signal is performed by multiplying the
signal with its quadrature component.
PD Charge Pump Reference
Pin IREF functions as a current source for use in the charge pump of the PLL. The current
is set by connecting pin VREF (reference voltage) by a resistor to ground. This external
resistor allows for a much smaller tolerance than would be feasible with an on-chip
resistor.
Prescaler
The prescaler divides the signal frequency of the active VCO by a ratio of 1:64 (MOD
high) or 1:65 (MOD low) and outputs it on pin FI.
The MOD input is TTL/CMOS compatible. The output is compatible to the CMOS
frequency synthesizer family PMB 2306 / PMB 2307, with a minimum logic swing of
0.5 Vpp.
The supply VCC1 is used to feed the prescaler. Due to the internal interface VCC1 must be
connected to VCC2.
Semiconductor Group
5
PMB 2220
Circuit Description
Summary of Function Modes
Power Down Operation
The following table shows the relation between the logic level of the inputs TXLOFF and
TXON and the status of the different function blocks.
The “power down code” lists the logic levels of the inputs in the order TXLOFF, TXON.
L = logic LOW, H = logic HIGH
off: function block in power down mode or stand by
on: function block in normal operation
Function Blocks
Power Down Code
(TXLOFF, TXON)
L, x
H, L
H, H
Bandgap ref.,
power down dec.,
charge pump ref.,
voltage regulator
off
on
on
Prescaler
off
on
on
VCO1 (Rx)
off
on
off
VCO2 (Tx)
off
off
on
Delay, doubler
off
on
on
Prescaler Divider Ratio
The table shows the relation between the logic level of the input MOD and the prescaler
divider ratio.
Logic Level of MOD
Prescaler Divide Ratio
HIGH
1:64
LOW
1:65
Semiconductor Group
6
PMB 2220
Circuit Description
Figure 2
Supply Voltage Partitioning
Semiconductor Group
7
PMB 2220
Circuit Description
Figure 3
Input/Output Circuits Part 1
Semiconductor Group
8
PMB 2220
Circuit Description
Figure 4
Input/Output Circuits Part 2
Semiconductor Group
9
PMB 2220
Electrical Characteristics
3
Electrical Characteristics
3.1
Absolute Maximum Ratings
TA = – 10 °C to + 55 °C
Parameter
Symbol
VCC1,2,(3)
Differential input voltage (pins LOB1 Vdiff
Supply voltage
Limit Values
Unit
min.
max.
– 0.5
+7
V
–1
+1
V
Remarks
to LOE1 and LOB2 to LOE2)
Resistance between pin
VREF and GND
RVREF
Junction temperature
Tj
TS
Storage temperature
kΩ
note 1)
+ 125
°C
note 2)
+ 150
°C
1.3
– 65
1)
Corresponds to a current IREF of about 700 µA.
2)
The thermal resistance Rth (junction to ambient) of the P-SSOP-20 package is about xxxx K/W.
Note: Stresses above those listed here may cause permanent damage to the device.
Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Maximum ratings are absolute ratings; exceeding only one of these values may
cause irreversible damage to the integrated circuit.
3.2
Operational Range
Parameter
Symbol
Limit Values
min.
max.
5.5
Unit
Remarks
V
VCC
= VCC1
= VCC2
kΩ
note 1)
Supply voltage
VCC
3.0
Resistance between pin VREF and
GND
RVREF
2.6
Voltage at pin IREF
VIREF
GND
VCC – 1.5 V
Input-/Oscillation frequency
fVCO
800
1000
1)
VCC
= VCC1
= VCC2
MHz
Corresponds to a current IREF of about 360 µA.
Note: In the operating range the functions given in the circuit description are fulfilled.
Semiconductor Group
10
PMB 2220
Electrical Characteristics
3.3
AC / DC Characteristics
Supply voltage VCC = 3.0 … 5.5 V
Ambient temperature TA = – 10 … + 55 °C
Parameter
Symbol
Limit Values
min.
typ.
Unit
Test
Test Conditions
Circuit
max.
Supply Currents
Supply current
during standby
(TXLOFF = LOW)
Supply current
(TXLOFF = HIGH)
IVCC1
50
µA
1
TA = 25 °C;
VCC1 = 3.0 V
IVCC2
50
µA
1
VCC2 = 3.0 V
IVCC3
70
µA
1
IPA/PAX
50
µA
1
IVCC1
2.7
3.6
mA
1
TA = 25 °C;
VCC1 = 3.0 V
IVCC2
13.8
17
mA
1
VCC2 = 3.0 V
IVCC3
7.7
10
mA
1
VCC3 = 3.0 V
4.5
5.5
mA
1
IVCC1
3.0
4
mA
1
TA = 25 °C;
VCC1 = 5.5 V
IVCC2
14.9
18
mA
1
VCC2 = 5.5 V
IVCC3
8.4
11
mA
1
VCC3 = 5.5 V
4.9
6
mA
IPA/PAX
Supply current
(TXLOFF = HIGH)
IPA/PAX
3.5
3.5
Control Inputs TXLOFF, MD, TXON
TXLOFF voltage
HIGH
VTXLOFFH
2.0
5.5
V
1
TXLOFF voltage
LOW
VTXLOFFL
GND
0.4
V
1
TXLOFF input
current HIGH
ITXLOFFH
200
µA
1
TXLOFF input
current LOW
ITXLOFFL
20
µA
1
TXON voltage HIGH VTXONH
2.0
5.5
V
1
TXON voltage LOW VTXONL
GND
0.8
V
1
TXON input current
HIGH
ITXONH
– 20
µA
1
TXON input current
LOW
ITXONL
– 100
µA
1
Semiconductor Group
11
PMB 2220
Electrical Characteristics
3.3
AC / DC Characteristics (cont’d)
Supply voltage VCC = 3.0 … 5.5 V
Ambient temperature TA = – 10 … + 55 °C
Parameter
Symbol
Limit Values
min.
typ.
Unit
Test
Test Conditions
Circuit
µA
1
max.
Current Source VREF, IREF
Current IREF
IIREF0
100
Tolerance due to
Production
– 10
+ 10
%
1
Tolerance due to
Temperature
–5
–5
%
1
4
µA/V
1
Sensitivity of IREF
with respect to
supply
2.5
m
RVREF = 8.7 kΩ,
pin IREF and GND
VCO (with Fixed Resonator and External Circuitry see Test Circuit 2)
Oscillator frequency fVCO
tuning range
2
VT = 0.5 … 2.5 V
MHz
2
with fixed
resonator
MHz
2
MHz
2
MHz
2
– 35
dB
2
note 1)
Rx-lower limit
fVCO – Rxmin
Rx-upper limit
fVCO – Rxmax
Tx-lower limit
fVCO – Txmin
Tx-upper limit
fVCO – Txmax
Power supply ripple
rejection
Ar
Supply voltage
dependence of
oscillator frequency
note 2)
∆ fVCO/∆ VCC3
300
kHz/V
2
1
Supply voltage
dependence of
oscillator frequency
note 2)
∆ fVCO/∆ VCC2
20
kHz/V
2
1
879
901
934
956
– 45
Note: VCC = VCC1 or VCC2
ripple with 200 mV amplitude, 10 µs rise/fall time, 900 µs cycle time, 50 % duty cycle.
200 mV ripple on VCC2 the overall frequency deviation should be less than 10 kHz.
∆ fVCO ≤ 10 kHz (typ)
1) Trapezoidal
2) Assuming
Semiconductor Group
12
PMB 2220
Electrical Characteristics
3.3
AC / DC Characteristics (cont’d)
Supply voltage VCC = 3.0 … 5.5 V
Ambient temperature TA = – 10 … + 55 °C
Parameter
Symbol
Limit Values
min.
Sideband noise
after frequency
doubling measured
at PA/PAX
typ.
max.
– 80
– 110
– 125
– 135
– 75
– 105
– 115
– 131
Unit
Test
Test Conditions
Circuit
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
2
2
2
2
at 50 kHz offset
at 1.2 MHz offset
at 3.0 MHz offset
at 4.7 MHz offset
Signal Output PA / PAX
Output resistance
RPA/X
150
Ω
differential
output
(fPA/X
= 1900 MHz)
Output capacitance
CPA/X
640
fF
in parallel to RPA/X
(fPA/X
= 1900 MHz)
Output level
PPA/X
Supply voltage
dependence of
output level
∆ PPA/X/
∆ VCC2
Temperature
dependence of
output level
Suppression of
fundamental
Semiconductor Group
dBm
1
RQ = 200 Ω
TA = 25 °C;
VCC2 = 3.0 V
+ 0.2
dBm/V
1
RQ = 200 Ω
∆ PPA/X /∆ TA
– 0.02
dBm/K
1
RQ = 200 Ω
Af
– 25
dB
1
–7
–5
13
–3
– 15
PMB 2220
Electrical Characteristics
3.3
AC / DC Characteristics (cont’d)
Supply voltage VCC = 3.0 … 5.5 V
Ambient temperature TA = – 10 … + 55 °C
Parameter
Symbol
Limit Values
min.
typ.
Unit
Test
Test Conditions
Circuit
Vpp
1
max.
Output FI and Input MOD
Output logic swing
VFI
0.5
MOD voltage High
VMODH
2.0
5.5
V
1
MOD voltage Low
VMODL
GND
0.8
V
1
MOD input current
High
IMODH
50
µA
1
MOD input current
Low
IMODL
µA
1
MOD setup time
(diagram 1)
tset
ns
1
– 100
29
CL ≤ 8 pF
Note: The listed characteristics are ensured over the operating range of the integrated
circuit. Typical characteristics specify mean values expected over the production
spread. If not otherwise specified, typical characteristics apply at TA = 25 °C and
the given supply voltage.
Semiconductor Group
14
PMB 2220
Electrical Characteristics
Figure 5
Diagram 1
Semiconductor Group
15
PMB 2220
Electrical Characteristics
Figure 6
Test Circuit 1
Test Circuit 2
The test circuit 2 given in this section is used to verify the system performance of the
synthesizer consisting of the PMB 2220 and the PMB 2306 or PMB 2307. The aim is to
give a common test circuit as well as its layout as a reference for the DECT related
system performance measurements.
Semiconductor Group
16
PMB 2220
Electrical Characteristics
Figure 7
Test Circuit 2: Circuit Diagram
Semiconductor Group
17
PMB 2220
Electrical Characteristics
Bill of Materials
Project Name: SCH\PMB_2220 Time & date: 16:49 Sep. 27, 1994
#
Device
Value
1
2
3
1
2
1
10
C
C
C
C
C
C
C
2.2 nF*
2.2 pF
2.7 pF
3.3 pF
3.9 pF
10 nF*
10 pF
3
2
1
1
2
1
1
2
1
1
2
1
2
1
1
1
1
22 pF
270 pF
470 pF
1 nF
100 nF*
820 pF
100 nF*
5.6 nF
1150 MHz
1200 MHz
68 µH
1N4007
BBY 51
ANT SMA-WBU
PMB 2306
PMB 2220
0603RC
0603RC
0603RC
0805RC
0805RC
0805RC
1206RC
1210RC
CER-RES
CER-RES
1210RC
MELF
SOT-23
2
2
9
C
C
C
C
C
C
C
C
RES
RES
COIL
DIODE
DIODE
CON
IC
IC
JUMPER
HEADER 2
R
R
R
22 k
330
3.9 k
0603RC
0603RC
0603RC
1
1
2
1
1
1
R
R
R
R
R
BJT
8.2 k
9.1 K
10 k
0Ω
10 k
BCW 67A
0603RC
0603RC
0805RC
1206RC
1206RC
SOT-23
Semiconductor Group
Package
Type
0603RC
0603RC
0603RC
0603RC
0603RC
0603RC
0603RC
SO-14
SSOP-20
18
Refdes
C102
C109, C110
C107, C108, C117
C111
C106, C116
C104
C120, C123, C124, C125, C126,
C127 C128, C130, C131, C134
C112, C121, C122
C101, C103
C115
C129
C118, C119
C105
C100
C132, C133
RXRES
TXRES
L101, L102
D103
D101, D102
BU1
IC101
IC102
JP1
R106, R107
R102, R103
R104, R105, R110, R111, R112,
R113, R115, R116, R117
R101
R108
R1, R2
R118
R109
T101
PMB 2220
Electrical Characteristics
Figure 8
Test Circuit 2: Top Layer
Semiconductor Group
19
PMB 2220
Electrical Characteristics
Figure 9
Test Circuit 2: Bottom Layer
Semiconductor Group
20
PMB 2220
Electrical Characteristics
Figure 10
Test Circuit 2: Drill Layer
Semiconductor Group
21
PMB 2220
Electrical Characteristics
Figure 11
Test Circuit 2: Assembly Diagram
Semiconductor Group
22
PMB 2220
Package Outlines
4
Package Outlines
GPS05387
P-SSOP-20-1
(Plastic Shrink Small Outline Package)
Sorts of Packing
Package outlines for tubes, trays etc. are contained in our
Data Book “Package Information”.
SMD = Surface Mounted Device
Semiconductor Group
23
Dimensions in mm