LTC1380IGN_技术文档

LTC1380/LTC1393

Single-Ended 8-Channel/

Differential 4-Channel Analog

Multiplexer with SMBus Interface

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FEATURES

DESCRIPTION

The LTC^®1380/LTC1393 are CMOS analog multiplexers with

SMBus^®compatible digital interfaces. The LTC1380 is a

single-ended 8-channel multiplexer, while the LTC1393 is a

differential 4-channel multiplexer. The SMBus digital inter-

face requires only two wires (SCL and SDA). Both the

LTC1380 and the LTC1393 have four hard-wired SMBus

addresses, selectable with two external address pins. This

allows four devices, each with a unique SMBus address, to

coexist on one system and for four devices to be synchro-

nized with one stop bit.

■

Micropower Operation: Supply Current = 20µA Max

2-Wire SMBus Interface

Single 2.7V to ±5V Supply Operation

Expandable to 32 Single or 16 Differential Channels

Guaranteed Break-Before-Make

Low R_ON: 35Ω Single Ended/70Ω Differential

Low Charge Injection: 20pC Max

■

Low Leakage: ±5nA Max

Available in 16-Lead SO and GN Packages

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The supply current is typically 10µA. Both digital interface

pins are SMBus compatible over the full operating supply

voltage range. The LTC1380 analog switches feature a

typicalR_ONof35Ω(± 5Vsupplies), typicalswitchleakageof

20pAandguaranteedbreak-before-makeoperation.Charge

injection is ±1pC typical.

APPLICATIONS

■

Data Acquisition Systems

Process Control

Laptop Computers

Signal Multiplexing/Demultiplexing

Analog-to-Digital Conversion Systems

■

The LTC1380/LTC1393 are available in 16-lead SO and GN

packages. Operation is fully specified over the commercial

and industrial temperature ranges.

, LTC and LT are registered trademarks of Linear Technology Corporation.

SMBus is a registered trademark of Intel Corporation.

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TYPICAL APPLICATION

On Resistance vs V_S

LTC1380 Single-Ended 8-Channel Multiplexer

5V

250

T

D

= 25°C

A

225

200

175

150

125

100

75

I

= 1mA

SMBus

HOST

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

0.1µF

15k

S0

S1

S2

S3

S4

S5

S6

S7

V

CC

V

CC

V

EE

= 2.7V

= 0V

SCL

SDA

SCL

SDA

A0

8 ANALOG

INPUTS

LTC1380

V

= 5V

= 0V

CC

A1

V

EE

V

= 5V

CC

GND

0.1µF

V

EE

= –5V

50

–5V

V

EE

25

ANALOG OUTPUT

1380/93 TA01

D

O

0

–5 –4 –3 –2 –1

0

1

2

3

4

5

V

(V)

S

1167 G15

1

LTC1380/LTC1393

W W U W

ABSOLUTE MAXIMUM RATINGS

(Note 1)

Maximum Switch-On Current .............................. 65mA

Power Dissipation............................................. 500mW

Operating Ambient Temperature Range

LTC1380C/LTC1393C ....................... 0°C ≤ T_A≤ 70°C

LTC1380I/LTC1393I .................... –40°C ≤ T_A≤ 85°C

Junction Temperature........................................... 125°C

Storage Temperature Range ................. –65°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300°C

Total Supply Voltage

LTC1380 (V_CCto V_EE) ......................................... 15V

LTC1393 (V_CCto GND) ....................................... 15V

Analog Input Voltage

LTC1380............................. V_EE– 0.3V to V_CC+ 0.3V

LTC1393................................... – 0.3V to V_CC+ 0.3V

Digital Inputs .............................................–0.3V to 15V

LTC1380 (V_CCTO V_EE) .... (V_EE– 0.3V) to (V_EE+ 15V)

LTC1393 (V_CCto GND) ..........................–0.3V to 15V

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PACKAGE/ORDER INFORMATION

TOP VIEW

ORDER PART

TOP VIEW

NUMBER

+

S0

S1

S2

S3

S4

S5

S6

S7

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

V

S0

S1

S2

S3

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

V

CC

–

+

–

+

–

+

–

SCL

SDA

A0

SCL

SDA

A0

LTC1380CGN

LTC1380CS

LTC1380IGN

LTC1380IS

LTC1393CGN

LTC1393CS

LTC1393IGN

LTC1393IS

A1

GND

–

V

D

O

EE

+

D

O

D

O

GN PACKAGE

S PACKAGE

GN PACKAGE

S PACKAGE

16-LEAD PLASTIC SSOP 16-LEAD PLASTIC SO

T_JMAX= 125°C, θ_JA= 130°C/ W (GN)

T_JMAX= 125°C, θ_JA= 100°C/ W (S)

T_JMAX= 125°C, θ_JA= 130°C/ W (GN)

T_JMAX= 125°C, θ_JA= 100°C/ W (S)

Consult factory for Military grade parts.

ELECTRICAL CHARACTERISTICS ^{(Notes 2, 4)}

SYMBOL PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

V

Analog Signal Range

LTC1380

●

V

ANALOG

EE

CC

LTC1393

0

R

On Resistance

LT1380: V = 5V, V = –5V,

35

70

120

Ω

ON

CC

EE

V

≤ (V , V ) ≤ V , I = ±1mA

●

EE

S

D

CC D

LT1393: V = 5V,

140

200

Ω

CC

0V ≤ (V , V ) ≤ V , I = ±1mA

S

D

CC D

LT1380/LTC1393: V = 2.7V, V = 0V,

210

400

600

Ω

CC

EE

0V ≤ (V , V ) ≤ V , I = ±1mA

●

S

D

CC D

∆R vs V

V

≤ (V , V ) ≤ V , V = 5V

20

0.5

%

ON

S

EE

S

D

CC CC

R

vs Temperature

= 5V

%/°C

ON

CC

I

Off-Channel or On-Channel

Switch Leakage

LTC1380: (V + 0.5V) ≤ (V , V ) ≤ (V – 0.5V)

±0.05

±5

±50

nA

LEAK

EE

S

D

CC

LTC1393: 0.5V ≤ (V , V ) ≤ (V – 0.5V)

●

S

D

CC

2

LTC1380/LTC1393

ELECTRICAL CHARACTERISTICS

(Notes 2, 4)

SYMBOL PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

V

SCL, SDA Input High Voltage

SCL, SDA Input Low Voltage

SDA Output Low Voltage

Address Input High Voltage

Address Input Low Voltage

SCL, SDA, Address Input Current

Positive Supply Current

●

1.4

IH

0.6

0.4

V

IL

I

= 3mA

= 5V

V

OL

AH

AL

SDA

V

2

V

CC

= 5V

0.8

±1

20

V

I

0V ≤ V ≤ V

CC

µA

pF

IN

V

CC

= 5V, All Digital Inputs at 5V

●

10

–0.1

3

CC

EE

Negative Supply Current

Input Off Capacitance

LTC1380: V = 5V, V = –5V, All Digital Inputs at 5V

–5

CC

EE

C

S

(Note 3)

C

D

Output Off Capacitance

(Note 3) LTC1380

LTC1393

26

18

pF

t

Switch Turn-On Time from

Stop Condition

Figure 1 LTC1380: V = 5V, V = –5V

●

850

1130

1500

2000

ns

ON

CC

EE

LTC1393: V = 5V

CC

LTC1380/LTC1393: V = 2.7V, V = 0V

CC

EE

Switch Turn-Off Time from

Stop Condition

Figure 1 LTC1380: V = 5V, V = –5V

●

640

650

670

1200

ns

OFF

CC

EE

LTC1393: V = 5V

CC

LTC1380/LTC1393: V = 2.7V, V = 0V

CC

EE

Break-Before-Make Interval

Off-Channel Isolation

Charge Injection

t

– t

OFF

●

75

210

–65

±1

ns

dB

pC

OPEN

ON

OIRR

Figure 2, V = 200mV , R = 1k, f = 100kHz (Note 3)

S P-P L

Q

Figure 3, C = 1000pF (Note 3)

●

±20

INJ

L

SMBus Timing (Note 6)

f

t

SMBus Operating Frequency

Bus Free Time Between Stop/Start

Hold Time After (Repeated) Start

Repeated Start Setup Time

Stop Condition Setup Time

Data Hold Time

●

100

kHz

µs

ns

µs

ns

SMB

4.7

4.0

4.7

4.0

300

250

4.7

4.0

BUF

HD:STA

SU:STA

SU:STO

HD:DAT

SU:DAT

LOW

Data Setup Time

Clock Low Period

Clock High Period

HIGH

f

SCL/SDA Fall Time

Time Interval Between 0.9V and (V

– 0.15)

ILMAX

300

DD

SCL/SDA Rise Time

Time Interval Between (V

– 0.15)

1000

r

ILMAX

and (V

+ 0.15)

IHMIN

Note 3: These typical parameters are based on bench measurements and

The

● denotes specifications which apply over the full operating

are not production tested.

temperature range.

Note 4: Both SCL and SDA assume an external 15k pull-up resistor to a

Note 1: Absolute Maximum Ratings are those values beyond which the life

typical SMBus host power supply V of 5V.

of a device may be impaired.

DD

Note 5: Typical curves with V = –5V apply to the LTC1380. Curves with

Note 2: All current into device pins is positive; all current out of device

EE

V

= 0V apply to both the LTC1380 and the LTC1393.

pins is negative. All voltages are referenced to ground unless otherwise

EE

specified. All typicals are given for T = 25°C, V = 5V (for both LTC1380

A

CC

Note 6: These parameters are guaranteed by design and are not tested in

production.

and LTC1393) and V = –5V (LTC1380).

EE

3

LTC1380/LTC1393

U W

(Note 5)

TYPICAL PERFOR A CE CHARACTERISTICS

On Resistance vs Temperature

Off-Channel Output Leakage vs V_D

Off-Channel Input Leakage vs V_S

0.0020

0.0018

0.0016

0.0014

0.0012

0.0010

0.0008

0.0006

0.0004

0.0002

0

0.010

0.008

0.006

0.004

0.002

0

250

225

200

175

150

125

100

75

I

= 1mA

T

= 25°C

T = 25°C

A

D

A

V

CC

V

EE

= 5V

= –5V

V

= 2.7V

= 0V

CC

EE

S

V

CC

V

EE

= 5V

= –5V

= 1.35V

V

CC

V

= 2.7V

EE

V

= 5V

= 0V

CC

EE

= 2.5V

V

CC

V

EE

= 5V

= 0V

V

EE

V

= 5V

CC

V

= 5V

= 0V

–0.002

–0.004

–0.006

–0.008

–0.010

CC

V

S

V

= –5V

V

EE

= 0V

V

= 2.7V

EE

S

CC

V

= 0V

50

25

0

50

75 100 125

–4.5–3.5 –2.5 –1.5 –0.5 0.5 1.5 2.5 3.5 4.5

(V)

–4.5–3.5 –2.5 –1.5 –0.5 0.5 1.5 2.5 3.5 4.5

(V)

– 50

0

25

–25

V

S

V

D

TEMPERATURE (°C)

1380/93 G02

1380/93 G03

1380/93 G01

Off-Channel Input Leakage

vs Temperature

On-Channel Input Leakage vs V_S

On-Channel Output Leakage vs V_D

0.010

0.008

0.006

0.004

0.002

0

0.010

0.008

0.006

0.004

0.002

0

10

1

T

A

= 25°C

T = 25°C

A

V

= 2.7V

EE

= 1.35V

CC

V

= 0V

S

V

CC

V

EE

= 5V

= –5V

V

CC

V

EE

= 5V

= –5V

V

= 5V

= 0V

0.1

CC

EE

= 2.5V

V

= 2.7V

EE

CC

V

S

V = 2.7V

CC

V

= 0V

V

EE

= 0V

0.01

0.001

0.0001

–0.002

–0.004

–0.006

–0.008

–0.010

–0.002

–0.004

–0.006

–0.008

–0.010

V

= 5V

CC

EE

S

= –5V

= 0V

V

CC

V

EE

= 5V

= 0V

V

CC

V

EE

= 5V

= 0V

–4.5–3.5 –2.5 –1.5 –0.5 0.5 1.5 2.5 3.5 4.5

(V)

–4.5–3.5 –2.5 –1.5 –0.5 0.5 1.5 2.5 3.5 4.5

(V)

–50 –25

0

25

50

75 100 125

V

TEMPERATURE (°C)

S

D

1380/93 G04

1380/93 G05

1380/93 G06

Off-Channel Output Leakage

vs Temperature

On-Channel Input Leakage

vs Temperature

On-Channel Output Leakage

vs Temperature

1000

100

1000

100

1000

100

V

= 5V

= –5V

= 0V

V

= 2.7V

= 0V

CC

V

= 5V

= 0V

CC

V

CC

EE

= 2.5V

V

EE

V

EE

= 1.35V

D

V

S

D

V

= 2.7V

EE

= 1.35V

10

1

10

1

10

1

CC

V

= 0V

V

= 5V

CC

EE

S

V

EE

V

= 5V

CC

= –5V

D

V

= 5V

= 0V

CC

EE

= 2.5V

V

= –5V

= 0V

V

D

V

= 5V

= 0V

V

D

0.1

CC

EE

= 2.5V

V

= 2.7V

= 0V

CC

EE

V

D

0.01

0.001

0.01

0.001

0.01

0.001

= 1.35V

S

0.0001

50

TEMPERATURE (°C)

100 125

50

TEMPERATURE (°C)

100 125

50

TEMPERATURE (°C)

100 125

–50 –25

0

25

75

–50 –25

0

25

75

–50 –25

0

25

75

1380/93 G08

1380/93 G09

1380/93 G07

4

LTC1380/LTC1393

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TYPICAL PERFOR A CE CHARACTERISTICS

(Note 5)

Off Time vs Temperature

On Time vs Temperature

Q_INJvs V_C(Figure 3)

800

1600

5.0

T

= 25°C

V

= 2.7V

EE

= 1.35V

V

= 5V

A

CC

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

V

= 0V

V

= –5V

EE

V = 0V

S

700

600

1400

1200

V

= 2.7V

S

CC

V

= 0V

EE

V = 1.35V

S

V

CC

V

EE

= 5V

= –5V

V

EE

V

= 5V

= –5V

= 0V

V

= 5V

= 0V

CC

EE

= 2.5V

V

500

400

300

200

100

1000

800

600

400

200

V

S

V

= 5V

= 0V

CC

EE

V

= 2.5V

S

V

= 5V

= 0V

CC

EE

V

CC

V

EE

= 2.7V

= 0V

0

–25

0

50

75 100 125

–25

0

50

75 100 125

–50

25

–50

25

–5 –4 –3 –2 –1

0

1

2

3

4

5

TEMPERATURE (°C)

V (V)

C

1380/93 G10

1380/93 G11

1380/93 G12

Off-Channel Isolation vs Input

Common Mode Voltage (Figure 2)

Q_INJvs Temperature (Figure 3)

–75

–74

–73

–72

–71

–70

–69

–68

–67

–66

–65

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

V

EE

V

= 5V

= –5V

= 0V

CC

V

= 5V

= 0V

CC

EE

V

= 2.7V

= 0V

CC

EE

V

S

V

= 5V

= –5V

CC

EE

V

= 5V

= 0V

= 2.5V

CC

EE

V

S

V

= 2.7V

EE

= 1.35V

CC

V

= 0V

T

= 25°C

A

S

L

V

S

V

= 200mV , 100kHz

P-P

R

= 1k

–5 –4 –3 –2 –1

0

1

2

3

4

5

–50

0

25

50

75 100 125

–25

TEMPERATURE (°C)

V

(V)

C

1380/93 G14

1380/93 G13

I_CCvs Temperature

I_EEvs Temperature

10

9

8

7

6

5

4

3

2

1

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

–100

V

EE

= 5V

CC

V

= –5V

V

EE

V

= 5V

CC

V

= –5V

V

= 2.7V

EE

= 0V

CC

S

V

= 5V

= 0V

V

= 0V

CC

EE

V

–50

0

25

50

75 100 125

–50

0

25

50

75 100 125

–25

TEMPERATURE (°C)

1380/93 G15

1380/93 G16

5

LTC1380/LTC1393

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PIN FUNCTIONS

S0 to S7/S0^±to S3^±(Pin 1 to Pin 8):Single-Ended Analog

Multiplexer Inputs (S0 to S7) for the LTC1380. Differential

Analog Multiplexer Inputs (S0^±to S3^±) for the LTC1393.

A1, AO (Pin 12, Pin 13): Address Selection Pins. Tie these

twopinstoeitherV_CCorGNDtoselectoneoffourpossible

addresses to which the LTC1380/LTC1393 will respond.

+

SDA (Pin 14): SMBus Bidirectional Digital Input/Output

Pin. Thispinhasanopen-drainoutput andrequiresapull-

up resistor or current source to the positive supply for

normal operation. Data is shifted into and acknowledged

by the LTC1380/LTC1393 using this pin.

D_O/D_O(Pin9):AnalogMultiplexerOutputfortheLTC1380.

Positive Differential Analog Multiplexer Output for the

LTC1393.

V_EE/D_O^–(Pin 10): Negative Supply Pin for the LTC1380.

Negative Differential Multiplexer Output for the LTC1393.

For the LTC1380, V_EEshould be bypassed to GND with a

0.1µF ceramic capacitor when operating from split sup-

plies or connected to GND for single supply operation.

SCL (Pin 15): SMBus Clock Input. SDA data is shifted in

at rising edges of this clock during data transfer.

V_CC(Pin 16): Positive Supply Pin. This pin should be

bypassed to GND with a 0.1µF ceramic capacitor.

GND (Pin 11): Ground Pin.

W

BLOCK DIAGRA

ANALOG INPUTS

ANALOG OUTPUT(S)

MULTIPLEXER

SWITCHES

(LTC1380: S0 TO S7)

(LTC1380: D )

O

±

(LTC1393: S0 TO S3 )

(LTC1393: D )

O

4-BIT LATCH

AND DECODER

HOLD

SHIFT REGISTER

A0

A1

ADDRESS

COMPARATOR

SDA

SCL

SMBus STATE

MACHINE

STOP

1380/93 BD

6

LTC1380/LTC1393

TEST CIRCUITS

STOP CONDITION

WITH EN = 1

STOP CONDITION

WITH EN = 0

SCL

SDA

SCL

SDA

1.5V

0.4V

SCL

SDA

LTC1380

V

S

D

1.5V

0.4V

C

L

R

L

1V

35pF

1k

t

OFF

ON

V

80%

C

V

D

20%

t < 20ns, t < 20ns

1/2 • (V + V

)

CC

EE

V

C

1380/93 F01

r

f

Figure 1. Switch t_ON/t_OFFPropagation Delay from SMBus STOP Condition

SCL

SDA

SCL

SDA

OIRR = 20LOG (V /V )

LTC1380

10

D

S

WHERE V AND V ARE THE

S

D

V

S

D

AC VOLTAGE COMPONENTS

AT S AND D

V

S

R

L

200mV

P-P

1k

100kHz

V

C1

C2

1/2 • (V + V

)

1/2 • (V + V

)

CC

EE

CC

EE

1380/93 F02

Figure 2. Off-Channel Isolation (OIRR) Test

STOP CONDITION

WITH EN = 1

STOP CONDITION

WITH EN = 0

SCL

SDA

SCL

SDA

CHARGE INJECTION

1.5V

∆Q = ∆V • C

D

L

SCL

LTC1380

0.4V

V

S

D

1.5V

0.4V

C

L

SDA

V

C

1000pF

V

C

∆V

V

D

1380/93 F03

Figure 3. Charge Injection Test

7

LTC1380/LTC1393

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W

TI I G DIAGRA

ADDRESS BYTE

COMMAND BYTE

t

f

t

r

HIGH

S

P

SCL

t

HD:STA

LOW

SU:DAT

SU:STA

SU:STO

HD:DAT

SDA FROM

HOST

1

0

1

*

A1 A0

0

X

EN C2

C1 C0

t

*0 FOR LTC1380, 1 FOR LTC1393

BUF

SDA FROM

LTC1380/LTC1393

t

OFF

ON

t

OPEN

D

O

U

W U U

APPLICATIONS INFORMATION

Theory of Operation

A send byte protocol is initiated by the SMBus host with a

start bit followed by a 7-bit address code and a write bit.

Each slave compares the address code with its address.

The send byte write bit is Low. The selected slaves then

reply with an acknowledge bit by pulling the SDA line Low.

Next, the host sends an 8-bit command byte. When the

selected slave receives the whole command byte, it ac-

knowledges and retains the command byte in the shift

register. The host can terminate the serial transfer with a

stop bit or communicate with another slave device with a

repeatstart.Whenarepeatstartoccursbut theslaveisnot

selected, the command byte data is kept in the shift

register but the multiplexer control is not updated. The

multiplexer control latches the new command from the

shift register on the first stop bit after a successful com-

mand byte transfer. This allows the host to synchronize

several slave devices with a single stop bit. A1 and A0

select one of the four possible LTC1380/LTC1393 ad-

dresses as shown in Table 1. This allows up to four similar

devices to share the same SMBus, expanding the multi-

plexer to 32 single-ended channels with the LTC1380; 16

differential channels with the LTC1393. The first stop bit

after a successful send byte transfer will latch in the

multiplexer control bits (EN, C2, C1 and C0) and initiate a

break-before-make sequence.

The LTC1380/LTC1393 are analog input multiplexers with

anSMBusdigitalinterface. TheLTC1380isasingle-ended

8-to-1 multiplexer; the LTC1393 is a differential 4-to-1

mulitplexer. The LTC1380 operates on either bipolar or

unipolar supplies, the LTC1393 operates on a single

supply.TheminimumV_CCsupplyfortheLTC1380/LTC1393

is 2.7V. The maximum supply voltage (V_CCto V_EEfor the

LTC1380, V_CCfor the LTC1393) should not exceed 14V.

The multiplexer switches operate within the entire power

supply range. The LTC1380 V_CCand V_EEsupplies can be

offset such as 2.7V/–11V and 11V/–3V.

Serial Interface

The LTC1380/LTC1393 serial interface supports SMBus

send byte protocol as shown below with two interface

signals, SCL and SDA.

LTC1380 Send Byte Protocol

S

1

0

1

0

A1 A0

W

A

X

EN C2 C1 C0

A

P

LTC1393 Send Byte Protocol

S

1

0

1

A1 A0

W

X

EN C2 C1 C0

ADDRESS BYTE

COMMAND BYTE

S = SMBus START BIT

P = SMBus STOP BIT (THE FIRST STOP BIT AFTER A SUCCESSFUL COMMAND BYTE

UPDATES THE MULTIPLEXER CONTROL LATCH)

A = ACKNOWLEDGE BIT FROM LTC1380/LTC1393

W = WRITE COMMAND BIT

A1, A0 = ADDRESS BITS

EN, C2, C1, C0 = MULTIPLEXER CONTROL BITS

8

LTC1380/LTC1393

U

W U U

APPLICATIONS INFORMATION

Table 1. LTC1380/LTC1393 Address Selection

Both the LTC1380 and LTC1393 are compatible with the

Philips/Signetics I²C Bus interface. This 1V threshold for

SCA and SDA should not pose an operational problem

with I²C applications.

A1

0

A0

0

LTC1380

90H

LTC1393

98H

0

1

92H

9AH

1

0

94H

9CH

ThemultiplexerswitchesareselectedasshowninTable2.

Both the LTC1380 and the LTC1393 have an enable bit

(EN). A Low disables all switches while a High enables the

selected switch as programmed by bits C2, C1 and C0. A

stopbitafterasuccessfulsendbytesequenceforLTC1380/

LTC1393 will disable all switches before the new selected

switch is connected.

1

96H

9EH

SCListhesynchronizingclockgeneratedbythehost. SDA

is the bidirectional data transfer between the host and the

slave. ThehostinitiatesastartbitbydroppingtheSDAline

from High to Low while the SCL is High. The stop bit is

initiated by changing the SDA line from Low to High while

SCL is High. All address, command and acknowledge

signals must be valid and should not change while SCL is

High. The acknowledge bit signals to the host the accep-

tance of a correct address byte or the command byte.

Table 2. Multiplexer Control Bits Truth Table

+

–

LTC1380 D

LTC1393 D , D

O O

O

EN

0

C2

X

0

C1

X

0

C0

X

0

CHANNEL STATUS

All Off

S0

All Off

+

–

1

S0 , S0

At V_CCsupply above 2.7V, the SCL and SDA input thresh-

old is typically 1V with an input hysteresis of 100mV. The

typical SCL and SDA lines have either a resistive or current

sourcepull-upatthehost. TheLTC1380/LTC1393havean

open-drain NMOS transistor at the SDA pin to sink 3mA

below 0.4V during the slave acknowledge sequence. The

address selection input A1 and A0 are TTL compatible at

V_CC= 5V.

1

0

1

S1

+

1

0

1

0

S2

S1 , S1

1

0

1

S3

+

1

0

S4

S2 , S2

1

0

1

S5

+

1

0

S6

S3 , S3

1

S7

U

TYPICAL APPLICATIONS

Simplified LTC1393 Application

5V

SMBus

HOST

1

2

3

4

5

6

7

8

16

+

0.1µF

15k

S0

S1

S2

S3

V

CC

15

14

13

12

11

10

9

–

SCL

SDA

A0

SCL

SDA

+

–

+

–

+

–

4 DIFFERENTIAL

ANALOG INPUTS

LTC1393

A1

GND

–

D

O

DIFFERENTIAL

ANALOG OUTPUTS

+

O

1380/93 TA03

9

LTC1380/LTC1393

U

TYPICAL APPLICATIONS

16-Channel Multiplexer with Buffer

5V

SMBus

HOST

1

2

3

4

5

6

7

8

16

0.1µF

15k

S0

S1

S2

S3

S4

S5

S6

S7

V

CC

15

14

13

12

11

10

9

SCL

SDA

A0

SCL

SDA

LTC1380

A1

GND

V

EE

D

O

16

ANALOG

INPUTS

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

S0

S1

S2

S3

S4

S5

S6

S7

V

CC

SCL

SDA

A0

LTC1380

A1

–

GND

–5V

0.1µF

LT1351

V

OUT

V

EE

+

D

O

1380/93 TA04

Programmable Gain Amplifier

5V

R0

R1

R2

R3

R4

R5

R6

R7

SMBus

HOST

1

16

0.1µF

15k

S0

S1

S2

S3

S4

S5

S6

S7

V

CC

2

3

4

5

6

7

8

15

14

13

12

11

10

9

SCL

SDA

SCL

SDA

A0

LTC1380

A1

GND

0.1µF

–5V

V

EE

D

O

R

F

–

+

V

LT1055

OUT

ANALOG INPUT

1380/93 TA05

10

LTC1380/LTC1393

U

PACKAGE DESCRIPTION

Dimensions in inches (millimeters) unless otherwise noted.

GN Package

16-Lead Plastic SSOP (Narrow 0.150)

(LTC DWG # 05-08-1641)

0.189 – 0.196*

(4.801 – 4.978)

16 15 14 13 12 11 10

9

0.229 – 0.244

(5.817 – 6.198)

0.150 – 0.157**

(3.810 – 3.988)

1

2

3

4

5

6

7

8

0.015 ± 0.004

(0.38 ± 0.10)

× 45°

0.053 – 0.068

(1.351 – 1.727)

0.004 – 0.0098

(0.102 – 0.249)

0.007 – 0.0098

(0.178 – 0.249)

0° – 8° TYP

0.016 – 0.050

(0.406 – 1.270)

0.008 – 0.012

(0.203 – 0.305)

0.025

(0.635)

BSC

*

DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH

SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

GN16 (SSOP) 1197

** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD

FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

S Package

16-Lead Plastic Small Outline (Narrow 0.150)

(LTC DWG # 05-08-1610)

0.386 – 0.394*

(9.804 – 10.008)

16

15

14

13

12

11

10

9

0.150 – 0.157**

0.228 – 0.244

(3.810 – 3.988)

(5.791 – 6.197)

5

7

8

1

2

3

4

6

0.010 – 0.020

(0.254 – 0.508)

× 45°

0.053 – 0.069

(1.346 – 1.752)

0.004 – 0.010

(0.101 – 0.254)

0.008 – 0.010

(0.203 – 0.254)

0° – 8° TYP

0.050

(1.270)

TYP

0.014 – 0.019

(0.355 – 0.483)

0.016 – 0.050

0.406 – 1.270

S16 0695

*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH

SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD

FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.

11

LTC1380/LTC1393

U

TYPICAL APPLICATION

8 Differential Channel Multiplexer with A/D Converter

5V

SMBus

HOST

1

16

15

14

13

12

11

10

9

+

–

+

–

+

–

+

–

0.1µF

15k

S0

V

CC

2

3

4

5

6

7

8

S0

S1

S2

S3

SCL

SDA

A0

SCL

SDA

LTC1393

A1

GND

–

D

O

+

O

8 DIFFERENTIAL

ANALOG INPUTS

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

+

–

+

–

+

–

+

–

S0

S1

S2

S3

V

CC

SCL

SDA

A0

4.7µF

LTC1393

A1

LTC1286

1

2

3

4

8

7

6

5

GND

–

V

REF

CC

SERIAL CLOCK IN

D

+IN

–IN

CLK

O

+

SERIAL CLOCK OUT

D

O

OUT

CS

GND CS/SHDN

1380/93 TA06

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

LTC201A/LTC202/

LTC203

Micropower, Low Charge Injection, Quad CMOS

Analog Switches with Data Latches

Each Channel is Independently Controlled

LTC221/LTC222

LTC1390/LTC1391

LTC1623

Micropower, Low Charge Injection, Quad CMOS Analog Switches

8-Channel, Analog Multiplexer with Serial Interface

High Side Switch with SMBus Interface

Parallel Controlled with Data Latches

3V to ±5V in 16-Pin SO and PDIP

Regulated On-Board Charge Pump Drives

External N-Channel MOSFETS

138093f LT/GP 0398 4K • PRINTED IN USA

12 ^{Linear Technology Corporation}

●

1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900

●

FAX: (408) 434-0507 TELEX: 499-3977 www.linear-tech.com

LINEAR TECHNOLOGY CORPORATION 1998


型号：	LTC1380IGN
厂家：	Linear
描述：	Single-Ended 8-Channel/ Differential 4-Channel Analog Multiplexer with SMBus Interface 单端8通道/差分4通道模拟多路复用器，带有SMBus接口复用器开关复用器或开关信号电路光电二极管
文件：	总12页 (文件大小：278K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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