Analog Devices ADG787 Datasheet

2.5 Ω CMOS Low Power

A

A

FEATURES

USB 1.1 signal switching compliant

−3 dB bandwidth 150 MHz
Tiny 10-lead LFCSP, WLCSP, MSOP packages
Single-supply 1.8 V to 5.5 V operation
Low on resistance

2.5 Ω typ

3.35 max at 85°C

Typical power consumption: <0.1 µW

APPLICATIONS

USB 1.1 signal switching circuits
Cellular phones
PDAs
MP3 players
Battery-powered systems
Headphone switching
Audio and video signal routing
Communications systems

Dual 2:1 Mux/Demux USB 1.1 Switch

ADG787

FUNCTIONAL BLOCK DIAGRAM

S1

S1B

S2

S2B

ADG787

IN1

IN2

SWITCHES SHOWN

FOR A LOGIC 0 INPUT

Figure 1.

D1

D2

05250-001

GENERAL DESCRIPTION

The ADG787 is a low voltage, CMOS device that contains two
independently selectable, single-pole, double-throw (SPDT)
switches. It is designed as a general analog/digital switch and
can also be used for routing USB 1.1 signals.

This device offers low on resistance of typically 2.5 Ω, making
the part an attractive solution for applications that require low
distortion through the switch.

The ADG787 comes in a tiny 3 × 4 bump, 1.50 mm × 2.00 mm
WLCSP, a tiny 10-lead LFCSP, and a 10-lead MSOP. These
packages make the ADG787 the ideal solution for space­constrained applications.

Each switch conducts equally well in both directions when on
and has an input signal range that extends to the supplies. The
ADG787 exhibits break-before-make switching action.

MASK: FS (12Mbps)

1

= 25°C

05250-032

Figure 2. Eye Pattern; 12 Mbps, V

V

= 4.2 V, PRBS 31

DD

20.0ns/DIV
= 3V p-p

IN

T

A

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.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone]
Fax: [phone] © 2005 Analog Devices, Inc. All rights reserved.

www.analog.com

ADG787

TABLE OF CONTENTS

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

Te r m in o l o g y .......................................................................................7

Absolute Maximum Ratings............................................................ 5

Truth Tab l e .................................................................................... 5

ESD Caution.................................................................................. 5

Pin Configurations and Function Descriptions ........................... 6

REVISION HISTORY

1/05—Revision 0: Initial Version

Typical Perfor m a n c e Charac t e r ist i c s ..............................................8

Tes t Ci rc ui ts ..................................................................................... 12

Outline Dimensions....................................................................... 14

Ordering Guide .......................................................................... 15

Rev. 0 | Page 2 of 16

ADG787

SPECIFICATIONS

VDD = 4.2 V to 5.5 V, GND = 0 V, unless otherwise noted.

Table 1.

Parameter +25°C −40°C to +85°C Unit Test Conditions/Comments

ANALOG SWITCH

Analog Signal Range 0 to V
On Resistance (RON) 2.5 Ω typ VDD = 4.2 V, VS = 0 V to VDD, IS = 10 mA

2.9 3.35 Ω max See Figure 28
On Resistance Match Between Channels (∆RON) 0.02 Ω typ VDD = 4.2 V, VS = 3.5 V, IS = 10 mA

0.1 Ω max

On Resistance Flatness (R

) 0.65 Ω typ VDD = 4.2 V, VS = 0 V to V

FLAT (ON)

0.8 0.95 Ω max IS = 10 mA
LEAKAGE CURRENTS VDD = 5.5 V

Source Off Leakage IS(OFF) ±0.05 nA typ VS = 1 V/4.5 V, VD = 4.5 V/1 V; see Figure 29
Channel On Leakage ID, IS(ON) ±0.05 nA typ VS = VD = 1 V or 4.5 V; see Figure 30

DIGITAL INPUTS

Input High Voltage, V
Input Low Voltage, V

INH

INL

Input Current

I

or I

INL

INH

±0.1 µA max
CIN, Digital Input Capacitance 2.5 pF typ

DYNAMIC CHARACTERISTICS

t

ON

2

19 22 ns max VS = 3 V; See Figure 31
t

3 ns typ RL = 50 Ω, CL = 35 pF

OFF

5 6 ns max VS = 3 V; See Figure 31
Propagation Delay Skew, t

SKEW

0.15 ns max
Break-Before-Make Time Delay (t

) 10 ns typ RL = 50 Ω, CL = 35 pF

BBM

5 ns min VS1 = VS2 = 3 V; See Figure 32
Charge Injection 14 pC typ VD = 1 V, RS = 0 Ω, CL = 1 nF; See Figure 33
Off Isolation −63 dB typ RL = 50 Ω, CL = 5 pF, f = 1 MHz; See Figure 34
Channel-to-Channel Crosstalk −110 dB typ

−63 dB typ

Total Harmonic Distortion (THD + N) 0.03 % RL = 32 Ω, f = 20 Hz to 20 kHz, VS = 2 V p-p
Insertion Loss −0.2 dB typ RL = 50 Ω, CL = 5 pF; see Figure 35

−3 dB Bandwidth 145 MHz typ RL = 50 Ω, CL = 5 pF; see Figure 35
CS (OFF) 16 pF typ
CD, CS (ON) 40 pF typ

POWER REQUIREMENTS VDD = 5.5 V

I

DD

1 µA max

1

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

2

Guaranteed by design, not subject to production test.

1

DD

V

DD

2.0 V min

0.8 V max

0.005 µA typ VIN = V

INL

or V

INH

13 ns typ RL = 50 Ω, CL = 35 pF

0.06 ns typ CL = 50 pF; VS = 3 V

S1A to S2A/S1B to S2B; R

= 50 Ω, CL = 5 pF,

L

f = 1 MHz; see Figure 37
S1A to S1B/S2A to S2B; R

= 50 Ω, CL = 5 pF,

L

f = 1 MHz; see Figure 36

0.005 µA typ Digital inputs = 0 V or 5.5 V

Rev. 0 | Page 3 of 16

ADG787

VDD = 2.7 V to 3.6 V, GND = 0 V, unless otherwise noted.

Table 2.

Parameter +25°C −40°C to +85°C Unit Test Conditions/Comments

ANALOG SWITCH

Analog Signal Range V
On Resistance (RON) 4 Ω typ VDD = 2.7 V, VS = 0 V to VDD

5.2 5.5 Ω max IS = 10 mA; see Figure 28
On Resistance Match Between Channels (∆RON) 0.07 Ω typ VDD = 2.7 V, VS = 1.5 V

0.3 0.35 Ω max IS = 10 mA
On Resistance Flatness (R

) 1.6 Ω typ VDD = 2.7 V, VS = 0 V to V

FLAT (ON)

2.2 2.5 Ω max IS = 10 mA
LEAKAGE CURRENTS VDD = 3.6 V

Source Off Leakage IS(OFF) ±0.01 nA typ VS = 0.6 V/3.3 V, VD = 3.3 V/0.6 V; see Figure 29
Channel On Leakage ID, IS(ON) ±0.01 nA typ VS = VD = 0.6 V or 3.3 V; see Figure 30

DIGITAL INPUTS

Input High Voltage, V
Input Low Voltage, V

INH

INL

Input Current

I

or I

INL

INH

±0.1 µA max
CIN, Digital Input Capacitance 2 pF typ

DYNAMIC CHARACTERISTICS

t

ON

2

30 35 ns max VS = 1.5 V; see Figure 31
t

4 ns typ RL = 50 Ω, CL = 35 pF

OFF

6 7 ns max VS = 1.5 V; see Figure 31
Propagation Delay Skew, t

SKEW

0.12 ns max
Break-Before-Make Time Delay (t

) 15 ns typ RL = 50 Ω, CL = 35 pF

BBM

5 ns min VS1 = VS2 = 1.5 V; see Figure 32
Charge Injection 10 pC typ VD = 1.25 V, RS = 0 Ω, CL = 1 nF; see Figure 33
Off Isolation −63 dB typ RL = 50 Ω, CL = 5 pF, f = 1 MHz; see Figure 34
Channel-to-Channel Crosstalk −110 dB typ

−63 dB typ

Total Harmonic Distortion (THD + N) 0.07 % RL = 32 Ω, f = 20 Hz to 20 kHz, VS = 1.5 V p-p
Insertion Loss −0.24 dB typ RL = 50 Ω, CL = 5 pF; see Figure 35

−3 dB Bandwidth 145 MHz typ RL = 50 Ω, CL = 5 pF; see Figure 35
CS (OFF) 16 pF typ
CD, CS (ON) 40 pF typ

POWER REQUIREMENTS VDD = 3.6 V

I

DD

1 µA max

1

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

2

Guaranteed by design, not subject to production test.

1

DD

1.3 V min

0.8 V max

0.005 µA typ VIN = V

INL

or V

INH

18 ns typ RL = 50 Ω, CL = 35 pF

0.04 ns typ CL = 50 pF; VS = 1.5 V

S1A to S2A/S1B to S2B; R

= 50 Ω, CL = 5 pF,

L

f = 1 MHz; see Figure 37
S1A to S1B/S2A to S2B; R

= 50 Ω, CL = 5 pF,

L

f = 1 MHz; see Figure 35

0.005 µA typ Digital Inputs = 0 V or 3.6 V

Rev. 0 | Page 4 of 16

ADG787

ABSOLUTE MAXIMUM RATINGS

TA = 25°C, unless otherwise noted.

Table 3.

Parameter Rating

VDD to GND −0.3 V to +6 V
Analog Inputs
Digital Inputs1

Peak Current, S or D

5 V Operation 300 mA

3.3 V Operation

Continuous Current, S or D

5 V Operation 100 mA

3.3 V Operation 80 mA

Operating Temperature Range

Industrial (B Version) −40°C to +85°C
Storage Temperature Range −65°C to +150°C
Junction Temperature 150°C
WLCSP Package (4-Layer Board)

θJA Thermal Impedance 120°C/W
LFCSP Package (4-Layer Board)

θJA Thermal Impedance 61°C/W
MSOP Package (4-Layer Board)

θJA Thermal Impedance 142°C/W

θJC Thermal Impedance 43.7°C/W
Lead-Free Temperature Soldering

IR Reflow, Peak Temperature 260°C ± 5°C

1

−0.3 V to VDD + 0.3 V

−0.3 V to +6 V or 10 mA,
whichever occurs first

200 mA (pulsed at 1 ms,
10% duty cycle max)

1

Overvoltages at IN, S, or D are clamped by internal diodes. Current should be

limited to the maximum ratings given.

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; 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.

TRUTH TABLE

Table 4.

Logic (IN1/IN2) Switch 1A/2A Switch 1B/2B

0 Off On
1 On Off

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 5 of 16