ANALOG DEVICES ADG936, ADG936-R Service Manual

查询ADG936BCP-500RL7供应商

Wideband 4 GHz, 36 dB Isolation at 1 GHz,

FEATURES

Wideband switch: −3 dB @ 4 GHz ADG936 absorptive dual SPDT ADG936-R reflective dual SPDT High off isolation (36 dB @ 1 GHz) Low insertion loss (0.9 dB dc to 1 GHz) Single 1.65 to 2.75 V power supply CMOS/LVTTL control logic 20-lead TSSOP and 4 mm × 4 mm LFCSP package Low power consumption (1 µA max)

APPLICATIONS

Wireless communications General-purpose RF switching Dual-band applications High speed filter selection Digital transceiver front end switch IF switching Tuner modules Antenna diversity switching

GENERAL DESCRIPTION

The ADG936/ADG936-R are wideband analog switches that comprise two independently selectable SPDT switches using a CMOS process to provide high isolation and low insertion loss to 1 GHz. The ADG936 is an absorptive/matched dual SPDT with 50 Ω terminated shunt legs; the ADG936-R is a reflective dual SPDT. These devices are designed such that the isolation is high over the dc to 1 GHz frequency range. They have on-board CMOS control logic, eliminating the need for external controlling circuitry. The control inputs are both CMOS and

–10

VDD = 2.5V

= 25°C

T

A

–20

–30

–40

–50

–60

OFF ISOLATION (dB)

–70

–80

Figure 3. Off Is olation v s. Frequency Figure 4. Inser tion Loss vs. Fre quency

S21

S12

FREQUENCY (Hz)

10G10k 100k 1M 10M 100M 1G

04503-0-019

CMOS 1.65 V to 2.75 V, Dual SPDT

ADG936/ADG936-R

FUNCTIONAL BLOCK DIAGRAMS

RF1A

04503-0-001

RFCA

INA

ADG936-R

RFCB

INB

VDD= 2.5V

RFCA

INA

ADG936

RFCB

INB

50Ω

RF2A

50Ω

RF1B

50Ω

RF2B

50Ω

Figure 1. Figure 2.

LVTTL compatible. The low power consumption of these CMOS devices makes them ideally suited for wireless applications and general-purpose high frequency switching.

PRODUCT HIGHLIGHTS

1. –36 dB off isolation @ 1 GHz.

2. 0.9 dB insertion loss @ 1 GHz.

3. 20-lead TSSOP and 4 mm × 4 mm LFCSP package.

–0.3 –0.4 –0.5 –0.6 –0.7 –0.8 –0.9 –1.0 –1.1 –1.2 –1.3 –1.4 –1.5 –1.6 –1.7 –1.8 –1.9 –2.0 –2.1 –2.2

INSERTION LOSS (dB)

–2.3 –2.4 –2.5 –2.6 –2.7 –2.8 –2.9

TA = 25°C

–3.0

FREQUENCY (Hz)

RF1A

RF2A

RF1B

RF2B

04503-0-012

10G10k 100k 1M 10M 100M 1G

04503-0-015

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.

www.analog.com

ADG936/ADG936-R

TABLE OF CONTENTS

Specifications..................................................................................... 3

Absorptive vs. Reflective ........................................................... 11

Absolute Maximum Ratings............................................................ 4

Pin Configurations and Function Descriptions ........................... 5

Te r mi n ol o g y ...................................................................................... 6

Typical Performance Characteristics ............................................. 7

Test C ir c ui t s ....................................................................................... 9

Applications..................................................................................... 11

REVISION HISTORY

7/04—Revision 0: Initial Version

Filter Selection ............................................................................ 11

Tx/Rx Switching ......................................................................... 11

Antenna Diversity Switch.......................................................... 11

Evaluation Board ............................................................................ 12

Outline Dimensions ....................................................................... 13

Ordering Guide .......................................................................... 14

Rev. 0 | Page 2 of 16

ADG936/ADG936-R

SPECIFICATIONS

VDD = 1.65 V to 2.75 V, GND = 0 V, Input Power = 0 dBm, all specifications T

MIN

to T

, unless otherwise noted.

MAX

Table 1.

B Version Parameter Symbol Conditions Min Typ2Max Unit

AC ELECTRICAL CHARACTERISTICS

Operating Frequency3 DC 2 GHz 3 dB Frequency4 4 GHz Input Power4 0 V dc bias 7 dBm

0.5 V dc bias 16 dBm Insertion Loss S21, S12 DC to 100 MHz; VDD = 2.5 V ± 10% 0.4 0.5 dB

500 MHz; VDD = 2.5 V ± 10% 0.6 0.8 dB 1000 MHz; VDD = 2.5 V ± 10% 0.9 1.25 dB

Isolation—RFCx to RF1x/RF2x S21, S

100 MHz 52 60 dB

12

500 MHz 40 47 dB 1000 MHz 31 36 dB

Crosstalk—RF1x to RF2x S21, S

100 MHz 53 69 dB

12

500 MHz 42 45 dB 1000 MHz 34 37 dB

Return Loss (On Channel)4 S

, S

11

DC to 100 MHz 20 25 dB

22

500 MHz 19 23 dB 1000 MHz 16 24 dB

Return Loss (Off Channel)4 S

, S

11

DC to 100 MHz 18 24 dB

22

500 MHz 17 23 dB 1000 MHz 16 21 dB

On Switching Time4 t Off Switching Time4 t Rise Time4 t Fall Time4 t 1 dB Compression4 P Third-Order Intermodulation Intercept IP Video Feedthrough

5

ON

OFF

RISE

FALL

–1 dB

3

3 mV p-p

50% CTRL to 90% RF 11 14 ns 50% CTRL to 10% RF 10 13 ns 10% to 90% RF 6.1 8 ns 90% to 10% RF 6 8 ns 1000 MHz 16 dBm 900 MHz/901 MHz, 4 dBm 29 32 dBm

DC ELECTRICAL CHARACTERISTICS

Input High Voltage V

V

Input Low Voltage V

V

Input Leakage Current I

INH

INL

I

VDD = 2.25 V to 2.75 V 1.7 V VDD = 1.65 V to 1.95 V 0.65 V

CC

VDD = 2.25 V to 2.75 V 0.7 V VDD = 1.65 V to 1.95 V 0.35 V 0 ≤ VIN ≤ 2.75 V ± 0.1 ± 1 µA

CAPACITANCE4

RF Port On Capacitance CRF ON f = 1 MHz 2.5 pF Digital Input Capacitance C

DIG

f = 1 MHz 2 pF

POWER REQUIREMENTS

V

DD

Quiescent Power Supply Current I

1.65 2.75 V

DD

Digital inputs = 0 V or V

DD

0.1 1 µA

1

Temperature range B Version: −40°C to +85°C.

2

Typical values are at VDD = 2.5 V and 25°C, unless otherwise noted.

3

Operating frequency is the point at which insertion loss degrades by 1 dB.

4

Guaranteed by design, not subject to production test.

5

Video feedthrough is the dc transience at the output of any port of the switch when the control voltage is switched from high to low or low to high in a 50 Ω test

setup, measured with 1 ns rise time pulses and 500 MHz bandwidth.

1

V

CC

Rev. 0 | Page 3 of 16

ADG936/ADG936-R

ABSOLUTE MAXIMUM RATINGS

TA = 25°C, unless otherwise noted.

Table 2.

Parameter Rating

VDD to GND –0.5 V to +4 V Inputs to GND –0.5 V to VDD + 0.3 V Continuous Current 30 mA Input Power 18 dBm Operating Temperature Range

Industrial (B Version) –40°C to +85°C Storage Temperature Range –65°C to +150°C Junction Temperature 150°C TSSOP Package

θJA Thermal Impedance 143°C/W LFCSP Package

θJA Thermal Impedance (4-layer board) 30.4°C/W Lead Temperature, Soldering (10 s) 300°C IR Reflow, Peak Temperature (<20 s) 235°C ESD 1 kV

1

Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Only one absolute maximum rating may be applied at any one time.

Table 3. Truth Table

INx RF1x RF2x

0 Off On 1 On Off

1

RF1x/RF2x Off Port Inputs to Ground = –0.5 V to VDD – 0.5 V.

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.

Rev. 0 | Page 4 of 16

ADG936/ADG936-R

A

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

RFC

V

GND

RF1A

GND GND

RF1B

GND GND

RFCB

DD

1 2

3

ADG936

ADG936-R

4 5

TOP VIEW

(Not to Scale)

6 7 8 9

10

20

GND

19

INA

18

GND

17

RF2A

16

GND

15

GND

14

RF2B

13

GND

12

INB GND

11

04503-0-002

Figure 5. 20-Lead TSSOP (RU-20) Figure 6. 20-Lead 4 mm × 4 mm LFCSP (CP-20)

Table 4. Pin Function Descriptions

Pin No.

20-Lead TSSOP

20-Lead LFCSP Mnemonic Function

1 18 RFCA Common RF Port for Switch A. 2 19 V

DD

Power Supply Input. These parts can be operated from 1.65 V to 2.75 V. VDD should be decoupled to GND.

3, 5, 6, 8, 9, 11,13, 15, 16, 18, 20

1, 3, 4, 6, 7, 9, 12,13, 15, 17, 20

GND Ground Reference Point for All Circuitry on the Part.

4 2 RF1A RF1A Port. 7 5 RF1B RF1B Port. 10 8 RFCB Common RF Port for Switch B. 12 10 INB Logic Control Input. 14 11 RF2B RF2B Port. 17 14 RF2A RF2A Port. 19 16 INA Logic Control Input.

GND

RF1A

GND GND

RF1B

1 2 3 4 5

DD

GND18 RFC

GND

V

20

17

19

ADG936

ADG936-R

TOP VIEW

(Not to Scale)

7

8

9

GND6GND

GND

RFCB

INA

16

10

INB

15 14 13 12 11

GND RF2A GND GND RF2B

04503-0-003

Rev. 0 | Page 5 of 16