ADF5904 데이터시트 PDF

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Data Sheet

4-Channel, 24 GHz,

Receiver Downconverter

ADF5904

FEATURES

GENERAL DESCRIPTION

Integrated baluns for single-ended receiver (Rx) inputs and

local oscillator (LO) input

Rx channel gain: 22 dB

Noise figure (NF): 10 dB

P1dB: −10 dBm

LO input range: −8 dBm to +5 dBm

Rx to IF isolation: 30 dB

RF signal bandwidth: 250 MHz

Rx output impedance: 900 Ω differential

LO input buffer: 24 GHz

RF and LO S11 at 50 Ω: −5 dB

Temperature sensor with analog output: ±5°

Electric static distortion (ESD) performance

Human body model (HBM): 1000 V

Charged device model (CDM): 500 V

Qualified for automotive applications

The ADF5904 is a 4-channel, 24 GHz, receiver downconverter.

Each channel contains a single-ended RF input with an on-chip

balun followed by a differential low noise amplifier (LNA) and a

downconverter mixer with differential output buffers. The RF

LO path also has an on-chip balun.

Control of the on-chip registers is through a simple 3-wire

interface.

The ADF5904 comes in a compact 32-lead, 5 mm × 5 mm

LFCSP package.

APPLICATIONS

Automotive radars

Industrial radars

Microwave (µW) radar sensors

FUNCTIONAL BLOCK DIAGRAM

AVDD

RX1_RF

RX2_RF

RX3_RF

RX4_RF

ATEST

CE

CLK

DATA

LE

DOUT

TEMP

SENSOR

32-BIT DATA

REGISTER

BALUN

LNA

BALUN

LNA

BALUN

LNA

BALUN

LNA

LO_IN

BALUN

ADF5904

GND

Figure 1.

Rev. 0

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Technical Support

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ADF5904

Data Sheet

TIMING CHARACTERISTICS

AVDD = 3.3 V ± 5%, GND = 0 V, dBm referred to 50 Ω, TA = TMAX to TMIN, unless otherwise noted. Operating temperature range is −40°C

to +105°C.

Table 2.

Parameter

t1

t2

t3

t4

t5

t6

t7

t8

t9

Limit at TMIN to TMAX

20

10

10

25

25

10

20

10

15

Unit

ns min

ns min

ns min

ns min

ns min

ns min

ns min

ns max

ns max

Description

LE setup time

DATA to CLK setup time

DATA to CLK hold time

CLK high duration

CLK low duration

CLK to LE setup time

LE pulse width

LE setup time to DOUT

CLK setup time to DOUT

Timing Diagrams

CLK

t4 t5

DATA

DB31 (MSB)

LE

t1

DOUT

DB31

(MSB)

t8

t9

t2 t3

DB30

DB2

(CONTROL BIT C3)

DB1

(CONTROL BIT C2)

DB0 (LSB)

(CONTROL BIT C1)

t7

DB30

DB1

t6

DB0

Figure 2. Timing Diagram

500µA IOL

TO DOUT PIN

CL

10pF

VDD/2

500µA IOH

Figure 3. Load Circuit for DOUT Timing, CL = 10 pF

Rev. 0 | Page 4 of 15

Data Sheet

TYPICAL PERFORMANCE CHARACTERISTICS

10

1

0.1

–40°C

+25°C

+105°C

0.01

–50 –45 –40 –35 –30 –25 –20 –15 –10 –5 0

RF INPUT POWER (dBm)

Figure 5. IF Output Power vs. RF Input Power,

LO Frequency = 24 GHz at −5 dBm and IF Frequency = 100 kHz

30

25

20

15

10

5 –40°C

+25°C

+105°C

0

–50 –45 –40 –35 –30 –25 –20 –15 –10 –5

0

RF INPUT POWER (dBm)

Figure 6. Conversion Gain vs. RF Input Power,

LO Frequency = 24 GHz at −5 dBm, and IF Frequency = 100 kHz

20

15

10

5

0

–5

–10

–15

–20

–25 –40°C

+25°C

–30 +105°C

–35

–50 –45 –40 –35 –30 –25 –20 –15 –10 –5

0

RF INPUT POWER (dBm)

Figure 7. IF Output Power vs. RF Input Power,

LO Frequency = 24 GHz at −5 dBm, and IF Frequency = 100 kHz

ADF5904

30

25

20

15

10

5 –40°C

+25°C

+105°C

0

23.90 23.95 24.00 24.05 24.10 24.15 24.20 24.25 24.30 24.35

RF FREQUENCY (Hz)

Figure 8. Channel Gain vs. RF Frequency,

Rx Input = −50 dBm, LO Power = −5 dBm, and IF Frequency = 100 kHz

30

25

20

15

10

5 –40°C

+25°C

+105°C

0

–20 –15 –10

–5

0

LO INPUT POWER (dB)

5

Figure 9. Channel Gain vs. LO Input Power, Rx Input = −50 dBm,

LO Frequency = 24 GHz, and IF Frequency = 100 kHz

20

18

16

14

12

10

8

6

4

–40°C

2 +25°C

+105°C

0

10k 100k 1M 10M

IF FREQUENCY (Hz)

Figure 10. Noise Figure vs. IF Frequency, LO Frequency = 24.125 GHz at −5 dBm

Rev. 0 | Page 7 of 15

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