Motorola MC13158FTB Datasheet

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The MC13158 is a wideband IF subsystem that is designed for high performance data and analog applications. Excellent high frequency performance is achieved, with low cost, through the use of Motorola’s MOSAIC 1.5 RF bipolar process. The MC13158 has an on–board grounded collector VCO transistor that may be used with a fundamental or overtone crystal in single channel operation or with a PLL in multi–channel operation. The mixer is useful to 500 MHz and may be used in a balanced differential or single ended configuration. The IF amplifier is split to accommodate two low cost cascaded filters. RSSI output is derived by summing the output of both IF sections. A precision data shaper has an Off function to shut the output off to save current. An enable control is provided to power down the IC for power management in battery operated applications.

Applications include DECT , wideband wireless data links for personal and portable laptop computers and other battery operated radio systems which utilize GFSK, FSK or FM modulation.

• Designed for DECT Applications

• 1.8 to 6.0 Vdc Operating Voltage

• Low Power Consumption in Active and Standby Mode

• Greater than 600 kHz Detector Bandwidth

• Data Slicer with Special Off Function

• Enable Function for Power Down of Battery Operated Systems

• RSSI Dynamic Range of 80 dB Minimum

• Low External Component Count

WIDEBAND FM IF

SUBSYSTEM FOR DECT

AND DIGITAL APPLICATIONS

SEMICONDUCTOR

TECHNICAL DATA

FTB SUFFIX

PLASTIC PACKAGE

CASE 873

(Thin QFP)

ORDERING INFORMATION

Operating

Device

MC13158FTB TA = – 40 to +85°C TQFP–32

Temperature Range

Package

Mix Out

CC1

IF In IF Dec1

IF Dec2

IF Out

CC2

Lim In

Representative Block Diagram

Osc

N/C

Osc

Emit

MC13158

Data

Slicer

5.0 p

Lim Out

Base

Quad

Mix

In1

In2

IF Amp

LIM Amp

Lim

Dec2

Dec1

This device contains 234 active transistors.

N/C

EE1

Det

Gain

EnableV

Bias

2532 31 30 29 28 27 26

16 EE2

RSSI

RSSI Buf

DS Gnd

DS Out

DS In2

DS “off”

DS In1

Det Out

MOTOROLA ANALOG IC DEVICE DATA

 Motorola, Inc. 1996 Rev 1

MC13158

MAXIMUM RATINGS

Rating Pin Symbol Value Unit

Power Supply Voltage 16, 26 V Junction Temperature T Storage Temperature Range T

NOTE: 1.Devices should not be operated at or outside these values. The “Recommended Operating

Conditions” provide for actual device operation.

S(max)

JMAX

stg

6.5 Vdc

+150 °C

–65 to +150 °C

RECOMMENDED OPERATING CONDITIONS (V

Rating

Power Supply Voltage 2, 7 V

TA = 25°C –40°C ≤ TA≤ 85°C 16, 26

Input Frequency 31, 32 F Ambient Temperature Range T Input Signal Level 31, 32 V

DC ELECTRICAL CHARACTERISTICS (T

Characteristic

Total Drain Current VS = 2.0 Vdc 16, 26 I

DATA SLICER (Input Voltage Referenced to VEE; VS = 3.0 Vdc; No Input Signal)

Output Current; V18 LO; V19 = V

Data Slicer Enabled (DS “on”) V18 < V

Output Current; V18 HI; V19 = V

Data Slicer Enabled (DS “on”) V18 > V

Output Current; V19 = V

Data Slicer Disabled (DS “off”) V20 = VS/2

= 25°C; VS = 3.0 Vdc; No Input Signal; See Figure 1.)

Condition Pin Symbol Min Typ Max Unit

VS = 3.0 Vdc 3.5 5.7 8.5 VS = 6.0 Vdc 3.5 6.0 9.5 See Figure 2

V20 = VS/2

See Figure 3

V20 = VS/2

See Figure 4

= V2 = V7; VEE = V16 = V22 = V26; VS = VCC – VEE)

Pin Symbol Value Unit

TOTAL

21 I

in A in

2.5 5.5 8.5 mA

2.0 5.9 – mA

– 0.1 1.0 µA

2.0 to 6.0 Vdc

10 to 500 MHz

–40 to +85 °C

200 mVrms

AC ELECTRICAL CHARACTERISTICS (T

Characteristic

MIXER

Mixer Conversion Gain Vin = 1.0 mVrms 31, 32, 1 – – 22 – dB

Noise Figure Input Matched 31, 32, 1 NF – 14 – dB Mixer Input Impedance Single–Ended 31, 32 Rp – 865 – Ω

Mixer Output Impedance 1 – – 330 – Ω

= 25°C; VS = 3.0 Vdc; fRF = 110.7 MHz; fLO = 100 MHz; See Figure 1.)

Condition Pin Symbol Min Typ Max Unit

See Figure 5

See Figure 15 Cp – 1.6 – pF

MOTOROLA ANALOG IC DEVICE DATA

MC13158

AC ELECTRICAL CHARACTERISTICS (continued) (T

Characteristic

IF AMPLIFIER SECTION

IF RSSI Slope See Figure 8 23 – 0.15 0.3 0.4 µA/dB IF Gain f = 10.7 MHz 3, 6 – – 36 – dB

Input Impedance 3 – – 330 – Ω Output Impedance 6 – – 330 – Ω

LIMITING AMPLIFIER SECTION

Limiter RSSI Slope See Figure 9 23 – 0.15 0.3 0.4 µA/dB Limiter Gain f = 10.7 MHz 8, 12 – – 70 – dB Input Impedance 8 – – 330 – Ω

Condition Pin Symbol Min Typ Max Unit

See Figure 7

= 25°C; VS = 3.0 Vdc; fRF = 110.7 MHz; fLO = 100 MHz; See Figure 1.)

Figure 1. T est Circuit

Osc Emit

MC13158

Lim Out

LO Input

5.0 p

Base

100 MHz 200 mVrms

N/COsc

Data

Slicer

N/CQuad

100 k

1.0

–3.0 Vdc

Det

Gain

EE1

Bias

2532 31 30 29 28 27 26

Enable

RSSI RSSI

Buf

Gnd

DS Out

In2

“off”

In1

Det

Out

EE2

51 k

–2.3 Vdc

0 to –3.0 Vdc

100

–1.5 Vdc

0 to –3.0 Vdc

–3.0 Vdc

Mixer

Output

Input

Output

Limiter

Input

110.7 MHz

330

RF Input

1.0 n

100 n

1.0 n

100 n

1.0 n

100 n

1:4

Mix Out

CC1

IF In

IF Dec1

IF Dec2

IF Out

CC2

Lim In

Mix

In2

Lim

Dec1

200

Lim

Dec2

100 n

In1

Lim Amp

N/C

1.0 n1.0 n

N/CMix

MOTOROLA ANALOG IC DEVICE DATA

200 pF

6.8 k

–3.0 Vdc

MC13158

T ypical Performance Over Temperature

(per Figure 1)

6.4

6.2

6.0

5.8

5.6

5.4

5.2

, TOTAL SUPPLY CURRENT (mA)

5.0

TOTAL

4.8

0.12 Data Slicer “On”

V19 = V

0.10

V20 = VS/2

0.08

0.06

0.04

DATA SLICER OUTPUT CURRENT ( A)

0.02

–40

Figure 2. T otal Supply Current versus

Ambient T emperature, Supply Voltage

VS = 6.0 V

3.0 V

2.0 V

DATA SLICER OUTPUT CURRENT (mA)

–20

0 20 40 60 80 100 120 0 20 40 60 80 100 120

TA, AMBIENT TEMPERATURE (°C)

Figure 4. Data Slicer On Output Current

versus Ambient T emperature

V18 > V

– 0.1 – 0.2 – 0.3 – 0.4

NORMALIZED MIXER GAIN (dB)

– 0.5

– 20 0 20 40 60 80 100 120 – 20 0 20 40 60 80 100 120

TA, AMBIENT TEMPERATURE (°C)

– 0.6

Figure 3. Data Slicer On Output Current

versus Ambient T emperature

8.5 Data Slicer “On” V19 = V

8.0

7.5

7.0

6.5

6.0

5.5

5.0

V20 = VS/2

–20

TA, AMBIENT TEMPERATURE (°C)

Figure 5. Normalized Mixer Gain

versus Ambient T emperature

0.2

0.1

–40

TA, AMBIENT TEMPERATURE (°C)

V18 < V

Vin = 1.0 mVrms VS = 3.0 Vdc fc = 110.7 MHz fLO = 100 MHz

Figure 6. Mixer RSSI Output Current versus

Ambient T emperature, Mixer Input Level

7.0

6.0

5.0 VS = 3.0 Vdc

fc = 110.7 MHz fLO = 100 MHz

4.0

3.0

MIXER RSSI OUTPUT CURRENT ( A)

2.0

– 20 0 20 40 60 80 – 20 0 20 40 60 80 100 120100 120

–40

TA, AMBIENT TEMPERATURE (°C)

Vin = 10 mVrms

Vin = 1.0 mVrms

0.6 VS = 3.0 Vdc

0.4

f = 10.7 MHz Vin = 1.0 mVrms

0.2

0 – 0.2 – 0.4

NORMALIZED IF AMP GAIN (dB)

– 0.6 – 0.8

–40

Figure 7. Normalized IF Amp Gain

versus Ambient T emperature

TA, AMBIENT TEMPERATURE (°C)

MOTOROLA ANALOG IC DEVICE DATA

MC13158

tT ypical Performance Over Temperature

(per Figure 1)

Figure 8. IF Amp RSSI Output Current versus

Ambient T emperature, IF Input Level

9.0

8.0

7.0 VS = 3.0 Vdc

6.0

f = 10.7 MHz

5.0

4.0

3.0

IF AMP RSSI OUTPUT CURRENT ( A)

2.0

– 20 0 20 40 60 80 – 20 0 20 40 60 80 100 120100 120

–40

TA, AMBIENT TEMPERATURE (°C)

Figure 10. Total RSSI Output Current versus

Ambient T emperature (No Signal)

0.60 VS = 3.0 Vdc

No Input Signal

0.55

0.50

0.45

Vin = 10 mVrms

Vin = 1.0 mVrms

Figure 9. Limiter Amp RSSI Output Current

versus Ambient T emperature, Input Signal Level

8.0

Vin = 100 mVrms

6.0

LIMITER AMP RSSI OUTPUT CURRENT ( A)

4.0

2.0

– 2.0

VS = 3.0 Vdc f = 10.7 MHz

–40

TA, AMBIENT TEMPERATURE (°C)

Vin = 10 mVrms

Vin = 1.0 mVrms

Vin = 100

Figure 11. Demodulator DC Voltage versus

Ambient Temperature

1.20

1.15

1.10

1.05

1.00

Vrms

VS = 3.0 Vdc R17 = 51 k R15 = 100 k

0.40

TOTAL RSSI OUTPUT CURRENT ( A)

0.35

SYSTEM LEVEL AC ELECTRICAL CHARACTERISTICS (T

12 dB SINAD Sensitivity: fRF = 112 MHz 1 – dBm Narrowband Application f

Without Preamp Figure 25 –101 With Preamp Figure 26 –113

Third Order Intercept Point f

1.0 dB Comp. Point VS = 3.5 Vdc 1.0 dB C.Pt. –39

NOTES: 1. Test Circuit & Test Set per Figure 24.

– 20 0 20 40 60 80 100 120

–40

TA, AMBIENT TEMPERATURE (°C)

Characteristic

RF2

2.Test Circuit & Test Set per Figure 27.

Condition Notes Symbol Typ Unit

= 1.0 kHz

mod

= ±125 kHz

dev

SINAD Curve

= 112 MHz 2 IIP3 –32 dBm

RF1

= 112.1 MHz

Figure 28

0.95

DEMODULATOR OUTPUT DC VOLTAGE (Vdc)

0.90 –40

– 20 0 20 40 60 80 100 120

TA, AMBIENT TEMPERATURE (°C)

= 25°C; VS = 3.0 Vdc; fRF = 112 MHz; fLO = 122.7 MHz)

MOTOROLA ANALOG IC DEVICE DATA

MC13158

CIRCUIT DESCRIPTION

General

The MC13158 is a low power single conversion wideband FM receiver incorporating a split IF . This device is designated for use as the backend in digital FM systems such as Digital European Cordless Telephone (DECT) and wideband data links with data rates up to 2.0 Mbps. It contains a mixer, oscillator, Received Signal Strength Indicator (RSSI), IF amplifier, limiting IF, quadrature detector, power down or enable function, and a data slicer with output off function. Further details are covered in the Pin Function Description which shows the equivalent internal circuit and external circuit requirements.

Current Regulation/Enable

Temperature compensating voltage independent current regulators which are controlled by the enable pin (Pin 25) where “low” powers up and “high” powers down the entire circuit.

Mixer

The mixer is a double–balanced four quadrant multiplier and is designed to work up to 500 MHz. It can be used in differential or in single ended mode by connecting the other input to the positive supply rail. The linear gain of the mixer is approximately 22 dB at 100 mVrms LO drive level. The mixer gain and noise figure have been emphasized at the expense of intermodulation performance. RSSI measurements are added in the mixer to extend the range to higher signal levels. The single–ended parallel equivalent input impedance of the mixer is Rp ~ 1.0 kΩ and Cp ~ 2.0 pF. The buffered output of the mixer is internally loaded resulting in an output impedance of 330 Ω.

Local Oscillator

The on–chip transistor operates with crystal and LC resonant elements up to 220 MHz. Series resonant, overtone crystals are used to achieve excellent local oscillator stability . Third overtone crystals are used through about 65 to 70 MHz. Operation from 70 MHz up to 180 MHz is feasible using the on–chip transistor with a 5th or 7th overtone crystal. To enhance operation using an overtone crystal, the internal transistor bias is increased by adding an external resistor from Pin 29 to VEE; however, with an external resistor the oscillator stays on during power down. Typically, –10 dBm of local oscillator drive is needed to adequately drive the mixer. With an external oscillator source, the IC can be operated up to 500 MHz.

RSSI

The received signal strength indicator (RSSI) output is a current proportional to the log of the received signal amplitude. The RSSI current output is derived by summing the currents from the mixer, IF and limiting amplifier stages. An increase in RSSI dynamic range, particularly at higher input signal levels is achieved. The RSSI circuit is designed to provide typically 85 dB of dynamic range with temperature compensation.

Linearity of the RSSI is optimized by using external ceramic bandpass filters which have an insertion loss of

4.0 dB and 330 Ω source and load impedance. For higher data rates used in DECT and related applications, LC bandpass filtering is necessary to acquire the desired

bandpass response; however, the RSSI linearity will require the same insertion loss.

RSSI Buffer

The RSSI output current creates a voltage across an external resistor. A unity voltage–gain amplifier is used to buffer this voltage. The output of this buffer has an active pull–up but no pull–down, so it can also be used as a peak detector. The negative slew rate is determined by external capacitance and resistance to the negative supply .

IF Amplifier

The first IF amplifier section is composed of three differential stages with the second and third stages contributing to the RSSI. This section has internal DC feedback and external input decoupling for improved symmetry and stability. The total gain of the IF amplifier block is approximately 40 dB at 10.7 MHz.

The fixed internal input impedance is 330 Ω. When using ceramic filters requiring source and loss impedances of 330 Ω, no external matching is necessary. Overall RSSI linearity is dependent on having total midband attenuation of 10 dB (4.0 dB insertion loss plus 6.0 dB impedance matching loss) for the filter. The output of the IF amplifier is buffered and the impedance is 330 Ω.

Limiter

The limiter section is similar to the IF amplifier section except that five differential stages are used. The fixed internal input impedance is 330 Ω. The total gain of the limiting amplifier section is approximately 70 dB. This IF limiting amplifier section internally drives the quadrature detector section and it is also brought out on Pin 12.

Quadrature Detector

The quadrature detector is a doubly balanced four quadrant multiplier with an internal 5.0 pF quadrature capacitor between Pins 12 and 13. An external capacitor may be added between these pins to increase the IF signal to the external parallel RLC resonant circuit that provides the 90 degree phase shift and drives the quadrature detector. A single pin (Pin 13) provides for the external LC parallel resonant network and the internal connection to the quadrature detector.

Internal low pass filter capacitors have been selected to control the bandwidth of the detector. The recovered signal is brought out by the inverting amplifier buffer. An external feedback resistor from the output (Pin 17) to the input of the inverting amplifier (Pin 15) controls the output amplitude; it is combined with another external resistor from the input to the negative supply (Pin 16) to set the output dc level. For a resistor ratio of 1, the DC level at the detector output is

2.0 VBE (see Figure 12). A small capacitor C17 across the first resistor (from Pin 17 to 15) can be used to reduce the bandwidth.

Data Slicer

The data slicer is a comparator that is designed to square up the data signal. Across the data slicer inputs (Pins 18 and 20) are back to back diodes.

MOTOROLA ANALOG IC DEVICE DATA

MC13158

Out

Oscillator, and IF Amplifer. The operating

The recovered data signal from the quadrature detector can be DC coupled to the data slicer DS IN1 (Pin 18). In the application circuit shown in Figure 1 it will be centered at

2.0 VBE and allowed to swing ± VBE. A capacitor is placed from DS IN2 (Pin 20) to VEE. The size of this capacitor and the nature of the data signal determine how faithfully the data slicer shapes up the recovered signal. The time constant is short for large peak to peak voltage swings or when there is a change in DC level at the detector output. For small signal or for continuous bits of the same polarity which drift close to the threshold voltage, the time constant is longer.

PIN FUNCTION DESCRIPTION

ÁÁ

Symbol

Mix Out

ÁÁÁ

CC1

ÁÁÁ

IF In

ÁÁÁ

Internal Equivalent Circuit

CC1

EE1

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CC1

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IF Dec2

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330

Dec1

ÁÁ

ÁÁÁ

Dec2

ÁÁÁ

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EE1

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IF In

IF Dec1

A unique feature of the data slicer is that the inverting switching stages in the comparator are supplied through the emitter pin of the output transistor (Pin 22 – DS Gnd) to V rather than internally to VEE. This is provided in order to reduce switching feedback to the front end. A control pin is provided to shut the data slicer output off (DS “off” – Pin 19). With DS “off” pin at VCC the data slicer output is shut off by shutting down the base drive to the output transistor. When a channel is being monitored to make an RSSI measurement, but not to collect data, the data output may be shut off to save current.

Description/External Circuit Requirements

Mixer Output

The mixer output impedance is 330 Ω; it

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matches to 10.7 MHz ceramic filters with 330 Ω input impedance.

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Mix

Supply V oltage (V

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This pin is the VCC pin for the Mixer, Local

supply voltage range is from 1.8 Vdc to

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5.0 Vdc. In the PCB layout, the VCC trace

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must be kept as wide as possible to minimize inductive reactances along the trace; it is best

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to have it completely fill around the surface

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mount components and traces on the circuit side of the PCB.

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CC1

)

IF Input

The input impedance at Pin 3 is 330 Ω. It

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64 k 64 k

matches the 330 Ω load impedance of a

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10.7 MHz ceramic filter. Thus, no external matching is required.

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IF DEC1 & DEC2

IF decoupling pins. Decoupling capacitors should be placed directly at the pins to enhance

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stability . Two capacitors are decoupled to the

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RF ground V

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& DEC2.

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; one is placed between DEC1

CC1

ÁÁ

MOTOROLA ANALOG IC DEVICE DATA

ÁÁÁ

Out

ÁÁÁ

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CC1

EE1

Out

IF Output

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The output impedance is 330 Ω; it matches

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the 330 input resistance of a 10.7 MHz ceramic filter.

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Limiter Decoupling

Out

ÁÁ

1 1,14,

27 & 28

ÁÁ

Symbol

CC2

ÁÁÁ

Lim

ÁÁÁ

Lim

ÁÁÁ

Dec1

ÁÁÁ

Lim

ÁÁÁ

Dec2

ÁÁÁ

N/C

ÁÁÁ

Lim Out

ÁÁÁ

Quad

ÁÁÁ

Det

ÁÁÁ

Gain

ÁÁÁ

Det

ÁÁÁ

Out

ÁÁÁ

EE2

ÁÁÁ

MC13158

PIN FUNCTION DESCRIPTION (continued)

Internal Equivalent Circuit

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7 V

CC2

EE2

Dec2

CC2

Lim

EE2

CC2

Det

Gain

EE2

330 64 k

Lim In

Lim Dec1

Lim

Quad

Out

5.0 p

64 k

Det

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Description/External Circuit Requirements

Supply Voltage (V

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This pin is VCC supply for the Limiter, Quadrature Detector, data slicer and RSSI

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buffer circuits. In the application PC board this

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pin is tied to a common VCC trace with V

Limiter Input

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The limiter input impedance is 330 Ω.

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Limiter Decou

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Decoupling capacitors are placed directly at

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these pins and to VCC (RF ground). Use the

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same procedure as in the IF decoupling.

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lin

CC2

)

CC1

No Connects

There is no internal connection to these pins;

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however it is recommended that these pins be

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connected externally to VCC (RF ground).

Limiter Output

The output impedance is low. The limiter

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drives a quadrature detector circuit with in–

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phase and quadrature phase signals.

Quadrature Detector Circuit

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The quadrature detector is a doubly balanced

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four–quadrant multiplier with an internal 5.0 pF capacitor between Pins 12 and 13. An external

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capacitor may be added to increase the IF

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signal to Pin 13. The quadrature detector pin is provided to connect the external RLC parallel

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resonant network which provides the 90 degree

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phase shift and drives the quadrature detector.

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Detector Buffer Amplifier

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This is an inverting amplifier. An external feed-

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back resistor from Pin 17 to 15, (the inverting input) controls the output amplitude; another

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resistor from Pin 15 to the negative supply

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(Pin 16) sets the DC output level. A 1:1 resistor

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ratio sets the output DC level at two VBE with respect to VEE. A small capacitor from Pin 17 to

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15 can be used to set the bandwidth.

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Supply Ground (V

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In the PCB layout, the ground pins (also applies

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to Pin 26) should be connected directly to

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chassis ground. Decoupling capacitors to V should be placed directly at the ground pins.

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EE2

)

MOTOROLA ANALOG IC DEVICE DATA

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