600 mA peak current at 5 V
Automotive temperature range: −40°C to +125°C
Rail-to-rail switching operation
Typical power consumption (<0.1 μW)
IN1
1B
3B
ADG888
D1
D2
D3
APPLICATIONS
Cellular phones
PDAs
MP3 players
Power routing
Battery-powered systems
PCMCIA cards
Modems
Audio and video signal routing
Communication systems
Data switching
IN2
SWITCHES SHOWN
FOR A LOGIC 1 INPUT
Figure 1.
05432-001
GENERAL DESCRIPTION
The ADG888 is a low voltage, dual DPDT (double pole double
throw) CMOS device optimized for high performance audio
switching. With its low power and small physical size, it is ideal
for portable devices.
This device offers ultralow on resistance of less than 0.8 Ω over
the full temperature range making it an ideal solution for
applications requiring minimal distortion through the switch.
The ADG888 also has the capability of carrying large amounts
of current, typically 400 mA at 5 V operation.
When on, each switch conducts equally well in both directions
and has an input signal range that extends to the supplies. The
ADG888 exhibits break-before-make switching action.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
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.
The ADG888 is available in a 4 × 4 bump, 2.0 mm × 2.0 mm
WLCSP; a 4 mm × 4 mm, 16-lead LFCSP; and a 16-lead TSSOP.
These packages make the ADG888 the ideal solution for spaceconstrained applications.
PRODUCT HIGHLIGHTS
1. <0.6 Ω over full temperature range of −40°C to +125°C.
2. High current handling capability (400 mA continuous
current at 5 V).
3. Low THD + N (0.008% typical).
4. Tiny 2 mm × 2 mm, 16-ball WLCSP package, and 16-lead
LFCSP and TSSOP packages.
VDD = 4.2 V to 5.5 V, GND = 0 V, unless otherwise noted.
Table 1.
−40°C −40°C
Parameter +25°C
ANALOG SWITCH
Analog Signal Range 0 V to VDD V
On Resistance (RON) 0.4 Ω typ VDD = 4.2 V, VS = 0 V to VDD, IDS = 100 mA;
0.48 0.55 0.6 Ω max See Figure 16
On Resistance Match Between 0.04 Ω typ VDD = 4.2 V, VS = 2.2 V, IDS = 100 mA
Channels (∆RON) 0.06 0.07 0.075 Ω max
On Resistance Flatness (R
) 0.07 Ω typ VDD = 4.2 V, VS = 0 V to VDD,
FLAT (ON)
0.11 0.13 0.14 Ω max IDS = 100 mA
LEAKAGE CURRENTS VDD = 5.5 V
Source Off Leakage IS (OFF) ±0.2 nA typ VS = 1 V/4.5 V, VD = 4.5 V/1 V; see Figure 17
Channel On Leakage ID, IS (ON) ±0.2 nA typ VS = VD = 1 V or 4.5 V; see Figure 18
DIGITAL INPUTS
Input High Voltage, V
Input Low Voltage, V
2.0 V min
INH
0.8 V max
INL
Input Current
I
or I
0.005 μA typ VIN = V
INL
INH
±0.1 μA max
CIN, Digital Input Capacitance 2 pF typ
DYNAMIC CHARACTERISTICS
2
tON 22 ns typ RL = 50 Ω, CL = 35 pF
30 33 35 ns max VS = 3 V/0 V; see Figure 19
t
13 ns typ RL = 50 Ω, CL = 35 pF
OFF
17 18 19 ns max VS = 3 V/0 V; see Figure 19
Break-Before-Make Time Delay (t
) 9 ns typ RL = 50 Ω, CL = 35 pF
BBM
5 ns min VS1 = VS2 = 3 V; see Figure 20
Charge Injection 70 pC typ VS = 0 V, RS = 0 Ω, CL = 1 nF; see Figure 21
Off Isolation −67 dB typ RL = 50 Ω, CL = 5 pF, f = 100 kHz; see Figure 22
Channel-to-Channel Crosstalk −99 dB typ
−67 dB typ
Total Harmonic Distortion (THD + N) 0.008 % RL = 32 Ω, f = 20 Hz to 20 kHz, VS = 3 V p-p
Insertion Loss −0.03 dB typ RL = 50 Ω, CL = 5 pF; see Figure 24
−3 dB Bandwidth 29 MHz typ RL = 50 Ω, CL = 5 pF; see Figure 24
CS (OFF) 58 pF typ
CD, CS (ON) 110 pF typ
POWER REQUIREMENTS VDD = 5.5 V
IDD 0.003 μA typ Digital inputs = 0 V or 5.5 V
1 4 μA max
1
Temperature range, Y version: −40°C to +125°C.
2
Guaranteed by design, not subject to production test.
Rev. 0 | Page 3 of 16
Page 4
ADG888
VDD = 2.7 V to 3.6 V, GND = 0 V, unless otherwise noted1.
Table 2.
−40°C −40°C
Parameter +25°C to +85°C to +125°C Unit Test Conditions/Comments
ANALOG SWITCH
Analog Signal Range 0 V to VDD V
On Resistance (RON) 0.5 Ω typ VDD = 2.7 V, VS = 0 V to VDD,
0.7 0.75 0.8 Ω max IS = 100 mA; see Figure 16
On Resistance Match Between 0.045 Ω typ VDD = 2.7 V, VS = 1 V,
Channels (∆RON) 0.065 0.07 0.075 Ω max IS = 100 mA
On Resistance Flatness (R
0.25 Ω max IS = 100 mA
LEAKAGE CURRENTS VDD = 3.6 V
Source Off Leakage IS (OFF) ±0.2 nA typ VS = 1 V/2.6 V, VD = 2.6 V/1 V; see Figure 17
Channel On Leakage ID, IS (ON) ±0.2 nA typ VS = VD = 1 V or 2.6 V; see Figure 18
DIGITAL INPUTS
Input High Voltage, V
Input Low Voltage, V
INH
0.8 V max
INL
Input Current
I
or I
0.005 μA typ VIN = V
INL
INH
±0.1 μA max
CIN, Digital Input Capacitance 2 pF typ
DYNAMIC CHARACTERISTICS
tON 28 ns typ RL = 50 Ω, CL = 35 pF; see Figure 19
43 47 50 ns max VS = 1.5 V/0 V
t
13 ns typ RL = 50 Ω, CL = 35 pF; see Figure 19
OFF
20 21 22 ns max VS = 1.5 V/0 V
Break-Before-Make Time Delay (t
5 ns min VS1 = VS2 = 1.5 V; see Figure 20
Charge Injection 50 pC typ VS = 0 V, RS = 0 Ω, CL = 1 nF; see Figure 21
Off Isolation −67 dB typ RL = 50 Ω, CL = 5 pF, f = 100 kHz; see Figure 22
Channel-to-Channel Crosstalk −99 dB typ
−67 dB typ
Total Harmonic Distortion (THD + N) 0.01 % RL = 32 Ω, f = 20 Hz to 20 kHz, VS = 1 V p-p
Insertion Loss −0.04 dB typ RL = 50 Ω, CL = 5 pF; see Figure 24
–3 dB Bandwidth 29 MHz typ RL = 50 Ω, CL = 5 pF; see Figure 24
CS (OFF) 60 pF typ
CD, CS (ON) 115 pF typ
POWER REQUIREMENTS VDD = 3.6 V
IDD 0.003 μA typ Digital inputs = 0 V or 3.6 V
1 2 μA max
1
Temperature range, Y version: −40°C to +125°C.
2
Guaranteed by design, not subject to production test.
) 0.16 Ω typ VDD = 2.7 V, VS = 0 V to VDD,
FLAT (ON)
1.3 V min
or V
INL
INH
2
) 14 ns typ RL = 50 Ω, CL = 35 pF
BBM
Adjacent channel; R
see
Figure 25
Adjacent switch; R
Figure 23
see
= 50 V, CL = 5 pF, f = 100 kHz;
L
= 50 Ω, CL = 5 pF, f = 100 kHz;
L
Rev. 0 | Page 4 of 16
Page 5
ADG888
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 3.
Parameter Rating
VDD to GND −0.3 V to +6 V
Analog Inputs1, Digital Inputs1
Peak Current, S or D
Continuous Current, S or D 400 mA
Operating Temperature Range
Automotive (Y Version) −40°C to +125°C
Storage Temperature Range −65°C to +150°C
Junction Temperature 150°C
16-Lead TSSOP Package
Overvoltages at IN, S, or D are clamped by internal diodes. Limit current to
the maximum ratings given.
−0.3 V to V
10 mA, whichever
occurs first
600 mA (pulsed at 1 ms,
10% duty cycle max)
112°C/W
130°C/W
30.4°C/W
+ 0.3 V or
DD
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 indicated in the operational
section 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.
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.
Figure 14. Total Harmonic Distortion + Noise (THD + N)
TA = 25°C
05432-014
0
TA=25°C
V
= 3V, 4.2V, 5V
DD
–20
–40
–60
–80
ATTENUATION (dB)
–100
–120
1001k10k100k1M10M100M
FREQUENCY (Hz)
Figure 12. Off Isolation vs. Frequency
0
TA = 25°C
= 3V, 4.2V, 5V
V
DD
–20
–40
–60
–80
ATTENUATION (dB)
–100
–120
ADJACENT CHANNELS (S1A-S2A)
ADJACENT SWITCHES (S1A-S1B)
S1A-S4A
05432-012
20
TA=25°C
= 3V, 4.2V, 5V
V
DD
NO DECOUPLING ON SUPPLIES
0
–20
–40
–60
ATTENUATION (dB)
–80
–100
1001k10k100k1M10M100M
FREQUENCY (Hz)
Figure 15. AC PSRR
05432-023
–140
1001k10k100k1M10M100M
FREQUENCY (Hz)
05432-013
Figure 13. Cross talk vs. Frequency
Rev. 0 | Page 8 of 16
Page 9
ADG888
V
V
TEST CIRCUITS
I
DS
V1
SD
V
S
RON = V1/I
Figure 16. On Resistance
DS
05432-015
IS (OFF)ID (OFF)
SD
AA
V
S
Figure 17. Off Leakage Figure 18. On Leakage
V
D
05432-016
NC
SD
ID (ON)
A
V
D
05432-017
V
DD
0.1μF
V
DD
S1B
V
S
S1A
IN
GND
D1
R
L
50Ω
V
C
L
35pF
OUT
V
IN
V
OUT
Figure 19. Switching Times, tON, t
50%50%
90%90%
t
ON
OFF
t
OFF
05432-018
V
DD
0.1μF
V
DD
S1B
S
S1A
IN
GND
D1
R
L
50Ω
C
L
35pF
V
OUT
0V
V
IN
V
OUT
Figure 20. Break-Before-Make Time Delay, t
50%50%
80%
t
BBM
BBM
80%
t
BBM
05432-019
V
DD
SW ON
V
OUT
IN
V
OUT
ΔV
OUT
S1B
D1
S
IN
S1A
GND
NC
V
1nF
Figure 21. Charge Injection
Q
INJ
SW OFF
= CL ×ΔV
OUT
05432-020
Rev. 0 | Page 9 of 16
Page 10
ADG888
0.1μF
V
DD
0.1μF
V
DD
V
DD
NC
S1B
OFF ISOLATION = 20 log
GND
S1A
D
50Ω
V
OUT
VS
Figure 22. Off Isolation
0.1μF
V
OUT
CHANNEL-TO-CHANNEL CROSSTALK = 20 log
V
R
50Ω
50Ω
S
L
S1A
S1B
Figure 23. Channel-to-Channel Crosstalk (S1A to S1B)
GND
V
V
V
OUT
VS
DD
DD
NETWORK
ANALYZER
50Ω
V
V
OUT
R
L
50Ω
D
V
DD
GND
S1AS1B
D
WITH SWITCH
V
OUT
V
WITHOUT SWITCH
OUT
S
05432-021
INSERTION LOSS = 20 log
NETWORK
ANALYZER
50Ω
V
V
OUT
R
L
50Ω
S
05432-022
Figure 24. Bandwidth
NETWORK
ANALYZER
V
R
50Ω
L
05432-024
OUT
50Ω
NC
50Ω
V
S
CHANNEL-TO-CHANNEL CROSSTALK = 20 log
NC
S2A
S2B
S1A
S1B
D2
D1
V
OUT
VS
NC
50Ω
05432-025
Figure 25. Channel-to-Channel Crosstalk (S1A to S2A)
Rev. 0 | Page 10 of 16
Page 11
ADG888
TERMINOLOGY
I
DD
Positive supply current.
V
(VS)
D
Analog voltage on Terminal D and Terminal S.
RON
Ohmic resistance between Terminal D and Terminal S.
R
FLAT (ON)
Flatness is defined as the difference between the maximum and
minimum value of on resistance as measured.
RON
Δ
On resistance match between any two channels.
(OFF)
I
S
Source leakage current with the switch off.
I
, IS (ON)
D
Channel leakage current with the switch on.
V
INL
Maximum input voltage for Logic 0.
V
INH
Minimum input voltage for Logic 1.
(I
INL
INH
)
I
Input current of the digital input.
(OFF)
C
S
Off switch source capacitance. Measured with reference to
ground.
, CS (ON)
C
D
On switch capacitance. Measured with reference to ground.
C
IN
Digital input capacitance.
t
ON
Delay time between the 50% and the 90% points of the digital
input and switch on condition.
t
OFF
Delay time between the 50% and the 90% points of the digital
input and switch off condition.
t
BBM
On or off time measured between the 80% points of both
switches when switching from one to another.
Charge Injection
A measure of the glitch impulse transferred from the digital
input to the analog output during on-off switching.
Off Isolation
A measure of unwanted signal coupling through an off switch.
Crosstalk
A measure of unwanted signal that is coupled through from one
channel to another as a result of parasitic capacitance. This is
specified for two conditions:
Adjacent channel, that is, S1A to S2A, S1B to S2B, S3A to
S4A, or S3B to S4B.
Adjacent switch, that is, S1A to S1B, S2A to S2B, S3A to
S3B, or S4A to S4B.
−3 dB Bandwidth
The frequency at which the output is attenuated by 3 dB.
On Response
The frequency response of the on switch.
Insertion Loss
The loss due to the on resistance of the switch.
THD + N
The ratio of the harmonic amplitudes plus signal noise to the
fundamental.