Motorola MC13150FTB, MC13150FTA Datasheet

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85°C

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The MC13150 is a narrowband FM IF subsystem targeted at cellular and other analog applications. Excellent high frequency performance is achieved, with low cost, through use of Motorola’s MOSAIC 1.5 RF bipolar process. The MC13150 has an onboard Colpitts VCO for Crystal controlled second LO in dual conversion receivers. The mixer is a double balanced configuration with excellent third order intercept. It is useful to beyond 200 MHz. The IF amplifier is split to accommodate two low cost cascaded filters. RSSI output is derived by summing the output of both IF sections. The quadrature detector is a unique design eliminating the conventional tunable quadrature coil.

Applications for the MC13150 include cellular, CT–1 900 MHz cordless telephone, data links and other radio systems utilizing narrowband FM modulation.

• Linear Coilless Detector

• Adjustable Demodulator Bandwidth

• 2.5 to 6.0 Vdc Operation

• Low Drain Current: <2.0 mA

• Typical Sensitivity of 2.0 µV for 12 dB SINAD

• IIP3, Input Third Order Intercept Point of 0 dBm

• RSSI Range of Greater Than 100 dB

• Internal 1.4 kΩ Terminations for 455 kHz Filters

• Split IF for Improved Filtering and Extended RSSI Range

ORDERING INFORMATION

Operating

Device

MC13150FT A MC13150FTB

Temperature Range

–

= –40 ° to +

Package

LQFP–24 LQFP–32

NARROWBAND FM COILLESS

DETECTOR IF SUBSYSTEM

FOR CELLULAR AND

ANALOG APPLICATIONS

SEMICONDUCTOR

TECHNICAL DATA

24 1

FTA SUFFIX

PLASTIC PACKAGE

CASE 977

(LQFP–24)

FTB SUFFIX

PLASTIC PACKAGE

CASE 873

(LQFP–32)

LQFP–24 LQFP–32

PIN CONNECTIONS

Mix

out

CC1

out

EE1

Mix

24 23 22 21 20 19

Mixer

789101112

CC2

LIM

LOeLO

Limiter

LIMd1LIM

Enable

RSSI

Detector

AdjFAdj

RSSI

DET

EE2

DET

AFT

out

Gain

Filt

out

Mix

Out

CC1

VCC (N/C)

out

MOTOROLA ANALOG IC DEVICE DATA

Mix

32 31 28 27 26 2530 29

1 2

3 4

6 7 8

910 1314151611 12

CC2

 Motorola, Inc. 1997 Rev 2

EE1

Mixer

LIM

(N/C)

LOeLO

Limiter

LIMd1LIM

Enable

(N/C)

Detector

AdjFAdj

RSSI

24 23 22 21 20 19 18 17

RSSI DET

VEE (N/C) V

DET VEE (N/C)

AFT AFT

out

EE2

Gain

Filt

out

MC13150

ÁÁÁÁ

MAXIMUM RATINGS

Rating Pin Symbol Value Unit

Power Supply Voltage Junction Temperature Storage Temperature Range

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

Limits” provide for actual device operation.

2.ESD data available upon request.

RECOMMENDED OPERATING CONDITIONS

Rating Pin Symbol Value Unit

Power Supply Voltage TA = 25°C

БББББББББББ

(See Figure 22)

БББББББББББ

Input Frequency

БББББББББББ

Ambient Temperature Range

БББББББББББ

Input Signal Level

БББББББББББ

–40°C ≤ TA ≤ 85°C

2, 9

– –

VCC(max)

Jmax T

stg

2, 9

21, 31

ÁÁ

–

ÁÁ

6.5

+150

–65 to +150

ÁÁÁÁ

Vdc

°C °C

2.5 to 6.0 0

ÁÁÁÁ

10 to 500

ÁÁÁÁ

–40 to +85

ÁÁÁÁ

Vdc

ÁÁÁ

MHz

ÁÁÁ

°C

ÁÁÁ

dBm

ÁÁÁ

DC ELECTRICAL CHARACTERISTICS (T

Characteristics

Total Drain Current

(See Figure 2)

ББББББББ

Supply Current, Power Down

Condition Pin Symbol Min Typ Max Unit

VS = 3.0 Vdc

ÁÁÁ

–

= 25°C, V

ÁÁ

CC1

2 + 9

= V

CC2

ÁÁÁÁ

(See Figure 3)

AC ELECTRICAL CHARACTERISTICS (T

= 25°C, VS = 3.0 Vdc, fRF = 50 MHz, fLO = 50.455 MHz,

LO Level = –10 dBm, see Figure 1 Test Circuit*, unless otherwise specified.)

Characteristics

12 dB SINAD Sensitivity

ББББББББ

(See Figure 15)

RSSI Dynamic Range

(See Figure 7)

ББББББББ

Input 1.0 dB Compression Point Input 3rd Order Intercept Point

ББББББББ

(See Figure 18)

Coilless Detector Bandwidth

Adjust (See Figure 11)

ББББББББ

Condition Pin Symbol Min Typ Max Unit

= 1.0 kHz;

mod

ББББББ

= ±5.0 kHz

dev

ÁÁÁ

–

ББББББ

ÁÁÁ

–

ББББББ

–

ÁÁÁ

Measured with No IF Filters

ББББББ

ÁÁÁ

MIXER

Conversion Voltage Gain

(See Figure 5) Mixer Input Impedance Mixer Output Impedance

Pin = –30 dBm; PLO = –10 dBm

Single–Ended

–

LOCAL OSCILLATOR

LO Emitter Current

ББББББББ

(See Figure 26)

ББББББ

–

ÁÁÁ

IF & LIMITING AMPLIFIERS SECTION

IF and Limiter RSSI Slope IF Gain IF Input & Output Impedance Limiter Input Impedance Limiter Gain

* Figure 1 Test Circuit uses positive (VCC) Ground.

Figure 7 Figure 8

– – –

= 3.0 Vdc, No Input Signal.)

TOTAL

–

– –

–

25 4, 8 4, 8

–

ÁÁÁ

–

ÁÁÁ

–

ÁÁÁ

1.0 dB C. Pt. IIP3

ÁÁÁ

∆BW adj

ÁÁÁ

–

– –

–

ÁÁÁ

– – – – –

1.7

ÁÁ

–

– –

–

– –

– – – – –

–100

100

–11

–1.0

200

1.5

0.4 42

1.5

1.5 96

3.0

ÁÁ

–

ÁÁ

–

– –

–

– –

100

– – – – –

ÁÁ

dBm

kHz/µA

Ω

kΩ

µA

µA/dB

dB kΩ kΩ dB

MOTOROLA ANALOG IC DEVICE DATA

MC13150

AC ELECTRICAL CHARACTERISTICS (continued) (T

LO Level = –10 dBm, see Figure 1 Test Circuit*, unless otherwise specified.)

Characteristics UnitMaxTypMinSymbolPinCondition

DETECTOR

Frequency Adjust Current Figure 9,

Frequency Adjust Voltage Figure 10,

Bandwidth Adjust Voltage Figure 12,

Detector DC Output Voltage

(See Figure 25)

Recovered Audio Voltage f

* Figure 1 Test Circuit uses positive (VCC) Ground.

fIF = 455 kHz

I15 = 1.0 µA

– 23 – – 1.36 – Vdc

= ±3.0 kHz 23 – 85 122 175 mVrms

dev

= 25°C, VS = 3.0 Vdc, fRF = 50 MHz, fLO = 50.455 MHz,

Figure 1. T est Circuit

LO Input

Local

Oscillator

Limiter

Mixer

IF In

49.9

IF Amp

Out

Mixer

Out

220 n

1:4

Z Xformer

220 n

1.5 k

220 n

1.5 k

EE1

220 n

100 n

31 30 29 28 27 26 25

EE1

Mixer

CC1

CC2

910111213141516

16 – 41 49 56 µA

16 – 600 650 700 mVdc

15 – – 570 – mVdc

100 n

Enable

49.9

RSSI

Buffer

(6)

Detector

EE2

100 p

100 k

RSSI

Buffer

V18–V17 = 0; fIF = 455 kHz

RSSI

Detector

Output

100 k

220 n 10

EE2

Limiter

MOTOROLA ANALOG IC DEVICE DATA

220 n

49.9

This device contains 292 active transistors.

220 n

I16I15

MC13150

MC13150 CIRCUIT DESCRIPTION

General

The MC13150 is a very low power single conversion narrowband FM receiver incorporating a split IF. This device is designated for use as the backend in analog narrowband FM systems such as cellular, 900 MHz cordless phones and narrowband data links with data rates up to 9.6 k baud. It contains a mixer, oscillator, extended range received signal strength indicator (RSSI), RSSI buffer , IF amplifier , limiting IF, a unique coilless quadrature detector and a device enable function (see Package Pin Outs/Block Diagram).

Low Current Operation

The MC13150 is designed for battery and portable applications. Supply current is typically 1.7 mAdc at 3.0 Vdc. Figure 2 shows the supply current versus supply voltage.

Enable

The enable function is provided for battery powered operation. The enabled pin is pulled down to enable the regulators. Figure 3 shows the supply current versus enable voltage, V device. Note that the device is fully enabled at VCC – 1.3 Vdc. Figure 4 shows the relationship of enable current, I enable voltage, V

Mixer

The mixer is a double–balanced four quadrant multiplier and is designed to work up to 500 MHz. It has a single ended input. Figure 5 shows the mixer gain and saturated output response as a function of input signal drive and for –10 dBm LO drive level. This is measured in the application circuit shown in Figure 15 in which a single LC matching network is used. Since the single–ended input impedance of the mixer is 200 Ω, an alternate solution uses a 1:4 impedance transformer to match the mixer to 50 Ω input impedance. The linear voltage gain of the mixer alone is approximately 4.0 dB (plus an additional 6.0 dB for the transformer). Figure 6 shows the mixer gain versus the LO input level for various mixer input levels at 50 MHz RF input.

(relative to VCC) needed to enable the

enable

The buffered output of the mixer is internally loaded,

resulting in an output impedance of 1.5 kΩ.

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 . 3rd overtone crystals are used through about 65 to 70 MHz. Operation from 70 MHz up to 200 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’s bias is increased by adding an external resistor from Pin 29 (in 32 pin QFP package) to VEE to keep the oscillator on continuously or it may be taken to the enable pin to shut it off when the receiver is disabled. –10 dBm of local oscillator drive is needed to adequately drive the mixer (Figure 6). The oscillator configurations specified above are described in the application section.

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 IF and limiting amplifier stages. An external resistor at Pin 25 (in 32 pin QFP package) sets the voltage range or swing of the RSSI output voltage. Linearity of the RSSI is optimized by using external ceramic bandpass filters which have an insertion loss of 4.0 dB. The RSSI circuit is designed to provide 100+ dB of dynamic range with temperature compensation (see Figures 7 and 23 which show the RSSI response of the applications circuit).

RSSI Buffer

The RSSI buffer has limitations in what loads it can drive. It can pull loads well towards the positive and negative supplies, but has problems pulling the load away from the supplies. The load should be biased at half supply to overcome this limitation.

MOTOROLA ANALOG IC DEVICE DATA

MC13150

Figure 2. Supply Current

versus Supply V oltage

2.0

1.6

1.2

0.8

, SUPPLY CURRENT (mA)

0.4

SUPPLY

1.5 2.5 3.5 4.5 5.5 6.5 7.5 V

, SUPPLY VOLTAGE (Vdc)

ENABLE

TA = 25°C

Figure 4. Enable Current

versus Enable V oltage

70 60

50 40 30 20

, ENABLE CURRENT (

ENABLE

IA)

–10

0 0.4 0.8 1.2 1.6 2.0

, ENABLE VOLTAGE (Vdc)

ENABLE

VCC = 3.0 Vdc TA = 25

Figure 3. Supply Current

versus Enable V oltage

Measured

0.7 0.9 1.1 1.3 1.5 V

, ENABLE VOLTAGE (Vdc)

ENABLE

, SUPPLY CURRENT (A)

SUPPLY

10 10 10 10 10 10 10 10

–2 –3 –4 –5 –6 –7 –8 –9

–10

VCC = 3.0 Vdc TA = 25 V

ENABLE

Relative to V

0.5

Figure 5. Mixer IF Output Level versus

RF Input Level

VEE = –3.0 Vdc

0 –10 –20 –30

MIXER IF OUTPUT LEVEL (dBm)

–40 –50

–50 –40 –30 –20 –10 0

TA = 25

fRF = 50 MHz; fLO = 50.455 MHz LO Input Level = –10 dBm (100 mVrms) (Rin = 50

RF INPUT LEVEL (dBm)

Ω

; R

= 1.4 k

out

Ω

10 20

Figure 6. Mixer IF Output Level versus

Local Oscillator Input Level

VEE = –3.0 Vdc

TA = 25

–20

–40

–60

MIXER IF OUTPUT LEVEL (dBm)

–80

–60 –50 –40 –30 –20 –10 0

fRF = 50 MHz; fLO = 50.455 MHz

Ω

Rin = 50

LO DRIVE (dBm)

; R

out

= 1.4 k

RF In = 0 dBm

MOTOROLA ANALOG IC DEVICE DATA

–20 dBm

–40 dBm

Ω

Figure 7. RSSI Output Current

versus Input Signal Level

VCC = 3.0 Vdc f = 50 MHz

RSSI OUTPUT CURRENT ( A)

fLO = 50.455 MHz 455 kHz Ceramic Filter

See Figure 15

–120 –100 –80 –60 –40 –20 0

SIGNAL INPUT LEVEL (dBm)

MC13150

IF Amplifier

The first IF amplifier section is composed of three differential stages. 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 42 dB at 455 kHz. Figure 8 shows the gain of the IF amplifier as a function of the IF frequency .

The fixed internal input impedance is 1.5 kΩ; it is designed for applications where a 455 kHz ceramic filter is used and no external output matching is necessary since the filter requires a 1.5 kΩ source and load impedance.

Figure 8. IF Amplifier Gain

versus IF Frequency

Vin = 100 µV

IF AMP GAIN (dB)

0.01 0.1 1.0 10

Ω

Rin = 50 R

= 1.4 k

out

BW (3.0 dB) = 2.4 MHz TA = 25

Ω

f, FREQUENCY (MHz)

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 1.5 kΩ.

Limiter

The limiter section is similar to the IF amplifier section except that six stages are used. The fixed internal input impedance is 1.5 kΩ. The total gain of the limiting amplifier section is approximately 96 dB. This IF limiting amplifier section internally drives the quadrature detector section.

Figure 9. F

Current

adj

versus IF Frequency

120

VCC = 3.0 Vdc

100

Slope at 455 kHz = 9.26 kHz/

CURRENT (

adj

FA)

200 400 600 800 1000

f, IF FREQUENCY (kHz)

Figure 10. F

versus F

800

750

700

VOLTAGE (mVdc)

adj

650

600

0 20 40 60 80 100

CURRENT (µA)

adj

Current

adj

Voltage

VCC = 3.0 Vdc TA = 25

Figure 11. BW

Current

adj

versus IF Frequency

3.5

3.0

2.5

2.0

1.5

CURRENT (

adj

1.0

BW A)

0.5 0

400 420 440 460 480 500

VCC = 3.0 Vdc



26 kHz/µA

f, IF FREQUENCY (kHz)

MOTOROLA ANALOG IC DEVICE DATA

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