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20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

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The HMC611LP4(E) Logarithmic Detector/Controller

converts RF signals at its input, to a proportional DC

voltage at its output. The HMC611LP4(E) employs

a successive compression topology which delivers

extremely high dynamic range and conversion accuracy

over a wide input frequency range. As the input power

is increased, successive amplifiers move into saturation

one by one creating an accurate approximation of the

logarithm function. The output of a series of square law

detectors is summed, converted into voltage domain

and buffered to drive the LOGOUT output. For detection

mode, the LOGOUT pin is shorted to the VSET input,

and will provide a nominal logarithmic slope of -25mV/

dB and an intercept of 18 dBm (22 dBm for ƒ ≥ 5.8 GHz).

The HMC611LP4(E) can also be used in the controller

mode where an external voltage is applied to the VSET

pin, to create an AGC or APC feedback loop.

General Description

Features

Functional Diagram

Wide Dynamic Range: Up to 63 dB

High Accuracy: ±1 dB with 54 dB Range Up to 8 GHz

Supply Voltage: +5V

Excellent Stability over Temperature

Buffered Temperature Sensor Output

24 Lead 4x4mm SMT Package: 16mm2

Typical Applications

The HMC611LP4(E) is ideal for IF and RF applica-

tions in:

• Cellular/PCS/3G

• WiMAX, WiBro, WLAN, Fixed Wireless & Radar

• Power Monitoring & Control Circuitry

• Receiver Signal Strength Indication (RSSI)

• Automatic Gain & Power Control

Parameter

Typ.

Typ.

Typ.

Typ.

Typ.

Units

Input Frequency

1 - 3600

5800

7000

8000

10000

MHz

±3 dB Dynamic Range

70

66

62

59

50

dB

±3 dB Dynamic Range Center

-25

-23

-21

-20

-15

dBm

±1 dB Dynamic Range

60

61

58

52

42

dB

Output Intercept

18

25

23

22

21

dBm

Output Slope

-25

-24

-26

-28

-32

mV/dB

758

20

28

mdB/°C

[1] Detector mode measurements; LOGOUT (Pin 15) is shorted to VSET (Pin 16).

60 dB, LOGARITHMIC

DETECTOR / CONTROLLER, 1 - 10000 MHz

v04.0309