Datasheet JUPITER Datasheet (MITEL)

The JUPITER circuit is designed for use in dual band and dual
mode mobile phones (CDMA/AMPS) and meets the requirements
for IS-95 when used with other chips from Mitel that form the
Planet chipset. JUPITER is an active filter incorporating circuits
for receiving both CDMA and FM (AMPS).

FEATURES

■ Low Power and Low Voltage Operation with a

Sleep Mode

■ Integrated CDMA and FM Filter with Wide

Dynamic Range

■ Low Inband Gain Ripple Performance and Good

I/Q Matching for the Filter

ABSOLUTE MAXIMUM RATINGS

Supply voltage, V
Operating temperature, T
Storage temperature, T
Junction temperature
CMOS input logic high, V
CMOS input logic low, V
Maximum input voltage at all pins

CC MAX

OP

(ambient)

STG

IH

IL

(at pins)

ORDERING INFORMATION

JUPITER-1/KG/NP1S

20·6V to V

20·7V to 15·3V

230°C to170°C
240°C to 1150°C
230°C to 1125°C

V

10·6V (Max.)

CC

20·6V (Min.)

10·6V

CC MAX

JUPITER

CDMA and FM (AMPS) I/Q Filter

Preliminary Information

DS4724 - 3.1 May 1998

Q_OC_TEST

Q_OC_TESTB

QIN

QINB

Q_OFFSET

Q_OFFSETB

V

TEST

RTUNE

ITUNE

QTUNE

QBAL
QOUT

QOUTB

V

CC

1
2
3
4
5
6
7

JUPITER

8
9
10
11
12
13
14

Fig. 1 Pin connections - top view

ESD PROTECTION

All pins are protected against electrostatic discharge to both
supplies. At least 2kV protection is provided to MIL-STD-883D
Method 3015.7 (human body model).

28
27
26
25
24
23
22
21
20
19
18
17
16
15

I_OC_TEST
I_OC_TESTB
IIN
IINB
I_OFFSET
I_OFFSETB
V

EE

MODE_CDMA
ENABLE
ENTEST
V

REF

IOUT
IOUTB

2

V

EE

NP28

IIN

MODE

SELECT

INPUTS

QIN

MODE

CONTROL

I CHANNEL

FILTER

CONTROL

GAIN

CONTROL

Q CHANNEL

Fig. 2 Simplified block diagram

IOUT

TUNE

CONTROLS

V

GC

QBAL

QOUT

JUPITER

CIRCUIT DESCRIPTION

The block diagram of the JUPITER filter is shown in
Fig. 3. Two tunable active low-pass gyrator filters are designed
with balanced I/Q inputs and outputs.

CDMA MODE

In CDMA mode the filter (F1 on Fig. 3) is a 7th order 0.1dB
ripple continuously tunable elliptic type with the corner frequency
tuned to 690kHz for best stop band attenuation and minimal
phase error (in the overall system). Variable gain stages after the
filter provide the gain control capability. Overall, each of the
CDMA I/Q channels has 45dB nominal voltage gain with the Q
channel having ±2dB gain adjustment range. Separate I/Q
frequency tuning functions are built into the device.

FM MODE

In FM mode the same filter is used; however, the biasing is
designed such that the current density in the transconductor cells
is reduced by a factor of 46, changing the filter’s cutoff frequency
to 15kHz. The filter characteristic of the main channel filter
(gyrator filter) remains the same, i.e. a 0.1dB 7th order elliptic. In
FM mode additional 2nd order Sallen and Key 0.1dB ripple
Chebeyshev filters (F2) are included in the signal path prior to the
gyrators. These improve the out-of-band blocking of the overall
filter. Different amplifiers are used in FM mode to those used in
CDMA mode to enable optimization of the gain distribution in FM
mode for current consumption and dynamic range.

OPERATION

Signal inputs are DC coupled in both CDMA and FM modes.
The device modes are selected by CMOS compatible logic
signals as shown in Table 2. An external resistor should be
connected between RTUNE and ground to set internal currents;
a resistor with a tolerance of 65% and a temperature coefficient
of less than 100ppm is recommended. V

(pin 18) should be

REF

decoupled to VCC to give optimum supply rejection.

A test mode is provided for filter calibration. In this mode, a test
signal is applied to the V

input (pin 7) with ENTEST held high.

TEST

The test mode is designed to interface with the PLUTO baseband
processor, which can provide the test signal and I/QTUNE
voltages and calibrates the filters using an internal auto calibration
algorithm. The algorithm generates two test frequencies and
calibrates the filters to give the correct attenuation at the upper
frequency. The calibration is normally carried out in CDMA
mode: the FM filter performance is scaled accordingly.

Pins are provided for DC offset control for I and Q channels
(I_OFFSET, I_OFFSETB, Q_OFFSET and Q_OFFSETB). In
typical operation, the I_OFFSET/Q_OFFSET pins would be
controlled by a voltage derived from the baseband processor.
However, it is also possible to minimise the DC offset using
external components; this is primarily intended for test purposes.
These feedback components between IOUT/QOUT and
I_OFFSET/Q_OFFSET are shown in Fig. 4 but would not be
used in the normal application
In test mode, these offset controls are disabled and the offsets
are controlled using on-chip feedback. The loop filter for this
feedback uses external 10nF capacitors on pins I_OC_TEST/B
and Q_OC_TEST/B as shown in Fig. 4.

Pin

Q_OC_TEST

1

Q_OC_TESTB

2

QIN

3

QINB

4

Q_OFFSET

5

Q_OFFSETB

6

V

7
8

RTUNE

9

ITUNE

10

QTUNE

11

QBAL

12

QOUT

13

QOUTB

14

V

15

VEE2

16

IOUTB

17

IOUT

18

V

19

ENTEST

20

ENABLE

21

MODE_CDMA

22

V

23

I_OFFSETB

24

I_OFFSET

25

IINB

26

IIN

27

I_OC_TESTB

28

I_OC_TEST

TEST

CC

REF

EE

Name

I/O

Q channel offset control in test mode

I

Q channel offset control in test mode (balanced)

I

Q channel CDMA/FM input.

I

Q channel CDMA/FM input (balanced)

I

Q channel offset control

I

Q channel offset control (high gain mode)

I

Test mode signal input for tuning operation

I

Description

Precision resistor for current definition (18k)
I filter tuning control

I

Q filter tuning control

I

Q channel gain adjust voltage, VGC

I

Q channel CDMA/FM output

O

Q channel CDMA/FM output (balanced)

O

Supply

P

Ground

P

I channel CDMA (balanced)

O

I channel CDMA

O

Reference voltage decouple
Mode control (see Table 2)

I

Mode control (see Table 2)

I

Mode control (see Table 2)

I

Ground (substrate)

P

I channel offset control (high gain mode)

I

I channel offset control

I

I channel CDMA (balanced)

I

I channel CDMA

I

I channel offset control in test mode (balanced)

I

I channel offset control in test mode

I

Table 1 Pin descriptions

2

Q_OFFSET

Q_OFFSETB

JUPITER

Q_OC_TESTBQ_OC_TEST

12
5
6

-0·1
dB

gm

gm

Q CHANNEL

± 2dB

F2

gm

50k

F3

V

GC

11

QBAL

QIN

QINB

ENTEST

ENABLE

MODE_CDMA

V

TEST

IIN

IINB

I_OFFSET

I_OFFSETB

3

-0·1
dB

ATTENUATOR

ATTENUATOR

F2

gm

4

19
20
21

7

26
25

24
23

MODE

CONTROL

gm

gm

gm

gm

F1

FILTER

CONTROL

F1

gm

F3

50k

28 27

I_OC_TESTBI_OC_TEST

X1

X1

12
13

10

8
9

17
16

15
22
14
18

QOUT
QOUTB

QTUNE
RTUNE
ITUNE

IOUT
IOUTB

VEE2
V

EE

V

CC

V

REF

Description ENTEST

ENABLE

Sleep mode
CDMA mode
FM mode
CDMA filter testmode
FM filter test mode
Disallowed mode

MODE_

CDMA

0
1
1
1
1
0

X
1
0
1
0
X

Fig. 3 Block diagram

All circuits powered down

1

Biasing and CDMA signal path on

0

Biasing and FM signal path on

0

Biasing, CDMA test and CDMA signal path on, excluding input amplifier

1

Biasing, FM test and FM signal path on, excluding input amplifier.

1

This is functionally the same as sleep mode but has higher I

0

In sleep mode PLUTO applies a logic high to ENTEST

Table 2 Truth table for mode control lines

Comments

CC

.

3

JUPITER

ELECTRICAL CHARACTERISTICS

The Electrical Characteristics are guaranteed over the following range of operating conditions unless otherwise
stated (see Fig. 4 for test circuit):

T

= 2 30°C to 170°C, VCC = 3V 10·6V/20·3V

AMB

DC Characteristics

Value

Characteristic Conditions

General

Supply voltage, V
Operating temperature, T

CC

AMB

Min.

2·7

230

Typ.

3·0

Max.

3·6

170

Units

V

°C

Supply Current, I

Sleep mode
FM mode
CDMA mode
Turn off time, CDMA/FM
mode to Sleep mode

Mode Control Lines (CMOS)

Input logic high, V
Input logic low, V
Input high current I
Input low current, I

Tune/Gain Control Lines

DC level
Input impedances:
QBAL, ITUNE and QTUNE
I_OFFSET/B and Q_OFFSET/B

I/O DC Voltages

Inputs IIN/B and QIN/B
Outputs IOUT/B and QOUT/B

CC

IH

IL

IH

IL

V
V

2·0

20·1
220
220

0·5

CC
CC

20·6
21·6

0·15

V

V
V

5·2

11·0

CC

0·5

20
20

2·0

CC
CC

10·1

20·2
21·2

3·4
7·3

100

200
500

V

20·4

CC

V

21·4

CC

mA
mA
mA

µA
µA

kΩ
kΩ

QBAL = ITUNE = QTUNE <0·5V
QBAL = ITUNE = QTUNE = 1·2V
QBAL = ITUNE = QTUNE = 1·2V
I

µs

V
V

reduced to 10% of active value

CC

All logic inputs

%

V

Referenced to on-chip ref. voltage (1·2V)

V
V

4

ELECTRICAL CHARACTERISTICS

FM Mode AC Characteristics

All parameters are defined as differential unless otherwise stated

Value

Characteristic Conditions

Min.

Typ.

JUPITER

Units

Max.

Maximum input frequency

Gain Characteristics

I voltage gain (A
Q voltage gain QIN/B to QOUT/B
Q channel gain adjust
Q channel gain control
Gain variation over temperature and
supply voltage
Differential output amplitude balance,
QOUT/QOUTB, IOUT/IOUTB

Power Supply Rejection

In-band
Out of band

Noise

Input referred

1dB Compression

Output 1dB compression
Out of band blocking signal causing 1dB
compression of in-band signal
Blocking signal at 60kHz

Blocking signal at 120kHz

) IIN/B to IOUT/B

V

39
21·5

A

V

62

20·75

1·5

266
266

41

4·0

10

0

30

1·9

380
380

10

43
11·5

A

V

8·0

10·75
60·25

45

MHz

dB
dB

dB/V

dB
dB

dB
dB

µVrms

Vp-p

mVrms
mVrms
mVrms
mVrms

External load = 50kΩ//5pF
QBAL = 1·2V
QBAL = 0·5 to 2V

= 6150mV

V

CC

Measured at I/Q output frequency = 10kHz
Measured at I/Q output frequency = 630kHz

Bandwidth = 10Hz to 5MHz. I and Q channels

Frequency = 2kHz

In-band frequency = 2kHz. All conditions
27°C only
In-band frequency = 2kHz. All conditions
27°C only

Intermodulation

Input referred intermodulation product

Filter Characteristic (Note 1)

3dB pass band
Stop band attenuation 45kHz
Stop band attenuation 60kHz to 10MHz
I and Q bandwidth matching
In-band gain ripple
Group delay variation
Average phase balance, I and Q channels

Offset Loop Correction

Filter offset adjustment gain:

I_OFFSET/Q_OFFSET
I_OFFSET B/Q_OFFSETB

Amplifier offset settling time:

After power on
After CDMA to FM cycling

Input Impedances

QIN/QINB and IN/INB

Output Impedances

QOUT/QOUTB and IOUT/IOUTB

14·5

48
60

0·6

8·0

2101

8·8

16·5

63
70

30

1·0

10

4·0

10

1·0

19·5

5

1·0

10

1·4

4·0

12

dBV

µVrms

kHz

dB
dB

%

dBp-p

µs

deg

V/V
V/V

ms
ms

kΩ

kΩ

Unmodulated interferers
60kHz 75mVrms, 120kHz 7·5mVrms

ITUNE = QTUNE = 1·2V

Frequency = 100Hz to 12·2kHz

%

Settling to within 5mV
Settling to within 5mV

Frequency = 2kHz

Frequency = 2kHz

NOTE 1. Filter tuned in CDMA mode to 28dB at 720kHz

5

JUPITER

ELECTRICAL CHARACTERISTICS

CDMA Mode AC Characteristics

All parameters are defined as differential unless otherwise stated

Value

Characteristic Conditions

Min.

Typ.

Max.

Units

Maximum input frequency

Gain Characteristics

I voltage gain (A

) IIN/B to IOUT/B

V

Q voltage gain QIN/B to QOUT/B
Q channel gain adjust
Q channel gain control
Gain variation over temperature and
supply voltage
Differential output amplitude balance,
QOUT/QOUTB, IOUT/IOUTB

Power Supply Rejection

In-band

Noise

Input referred

1dB Compression

Output 1dB compression
Out of band blocking signal causing 1dB
compression of in-band signal
Blocking signal at 60kHz

Blocking signal at 120kHz

43
21·5

A

V

62

20·75

1·5

110
110

45

4·0

20

110

1·9

150
150

10

47

AV11·5

8·0

10·75
60·25

MHz

dB
dB

dB/V

dB
dB

dB

µVrms

Vp-p

mVrms
mVrms
mVrms
mVrms

External load = 50kΩ//5pF
QBAL = 1·2V
QBAL = 0·5 to 2V

= 6150mV

V

CC

Measured at I/Q output frequency = 690kHz

Bandwidth = 10Hz to 5MHz. I and Q channels

Frequency = 2kHz

In-band frequency = 100kHz. All conditions
27°C only
In-band frequency = 100kHz. All conditions
27°C only

Intermodulation

Input referred intermodulation product

Input referred intermodulation product

2101

8·8

2101

8·8

284·8

57

284·8

57

dBV

µVrms

dBV

µVrms

dBV

µVrms

dBV

µVrms

Unmodulated interferers
900kHz 24mVrms, 1700kHz 15mVrms
27°C only

Unmodulated interferers
1·25MHz 24mVrms, 2·25MHz 15mVrms
27°C only

Filter Characteristic (Note 1)

ITUNE/QTUNE voltage

0·5

1·2

2·0

Tuning voltage to set filter to 28dB

V

at 720kHz relative to 350kHz

Pass band variation over supply and

23

13

0

%

V

CC

= 6150mV
temperature variation
I/Q tuning gain
Stop band attenuation 900kHz to 10MHz

50

240

55
I and Q bandwidth matching
In-band gain ripple

1·0

Average phase balance, I and Q channels

NOTE 1. Filter tuned to 28dB at 720kHz relative to 350kHz Cont…

kHz/V

dB

4

dBp-p

3

deg

ITUNE = QTUNE = 1·2V

%

Frequency = 1kHz to 630kHz
Frequency = 1kHz to 630kHz

6

ELECTRICAL CHARACTERISTICS

CDMA Mode AC Characteristics (continued)

Characteristic Conditions

Offset Loop Correction

Filter offset adjustment gain:

I_OFFSET/Q_OFFSET
I_OFFSET B/Q_OFFSETB

Amplifier offset settling time:

After power on
After FM to CDMA cycling

Input Impedances

QIN/QINB and IN/INB

Output Impedances

QOUT/QOUTB and IOUT/IOUTB

Min.

1·2

8·0

Value

Typ.

2·0
2·0

10

1·0

Max.

2·8

10

4·0

12

Units

V/V
V/V

ms
ms

kΩ

kΩ

JUPITER

Settling to within 6mV
Settling to within 6mV

Frequency = 2kHz

Frequency = 2kHz

V

CC

QTUNE

QIN

QIN

QINB

Q_OFFSET

10n 10n

QOUT

100n

V

CC

100k100k

10n 10n

Q_OFFSETB

Q_OC_TEST

Q_OC_TESTB

QOUT

V

QBAL MODE_CDMA

EN_TEST ENABLE

TEST

JUPITER

IINB

I_OFFSET

I_OFFSETB

I_OC_TEST

I_OC_TESTB

IOUT

IIN

ITUNE

100n

100k100k

V

CC

IIN

IOUT

QOUTB

RTUNE

220n 18k

VEEVEE2

Fig. 4 Test circuit

1n

V

REF

IOUTB

100n

V

CC

7

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