LTC1393C [Linear]
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接口型号: | LTC1393C |
厂家: | Linear |
描述: | Single-Ended 8-Channel/ Differential 4-Channel Analog Multiplexer with SMBus Interface |
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 |
LTC1380/LTC1393
Single-Ended 8-Channel/
Differential 4-Channel Analog
Multiplexer with SMBus Interface
U
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 RON: 35Ω Single Ended/70Ω Differential
Low Charge Injection: 20pC Max
■
■
■
■
■
■
■
■
Low Leakage: ±5nA Max
Available in 16-Lead SO and GN Packages
U
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
typicalRON of35Ω(± 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.
U
TYPICAL APPLICATION
On Resistance vs VS
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
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 ≤ TA ≤ 70°C
LTC1380I/LTC1393I .................... –40°C ≤ TA ≤ 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 (VCC to VEE) ......................................... 15V
LTC1393 (VCC to GND) ....................................... 15V
Analog Input Voltage
LTC1380............................. VEE – 0.3V to VCC + 0.3V
LTC1393................................... – 0.3V to VCC + 0.3V
Digital Inputs .............................................–0.3V to 15V
LTC1380 (VCC TO VEE) .... (VEE – 0.3V) to (VEE + 15V)
LTC1393 (VCC to GND) ..........................–0.3V to 15V
U
W U
PACKAGE/ORDER INFORMATION
TOP VIEW
ORDER PART
ORDER PART
TOP VIEW
NUMBER
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
S0
S1
S1
S2
S2
S3
S3
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
CC
–
+
–
+
–
+
–
SCL
SDA
A0
SCL
SDA
A0
LTC1380CGN
LTC1380CS
LTC1380IGN
LTC1380IS
LTC1393CGN
LTC1393CS
LTC1393IGN
LTC1393IS
A1
A1
GND
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
16-LEAD PLASTIC SSOP 16-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 130°C/ W (GN)
TJMAX = 125°C, θJA = 100°C/ W (S)
TJMAX = 125°C, θJA = 130°C/ W (GN)
TJMAX = 125°C, θJA = 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
V
V
V
V
ANALOG
EE
CC
CC
LTC1393
0
R
On Resistance
LT1380: V = 5V, V = –5V,
35
70
70
120
Ω
Ω
ON
CC
EE
V
≤ (V , V ) ≤ V , I = ±1mA
●
●
EE
S
D
CC D
LT1393: V = 5V,
140
200
Ω
Ω
CC
0V ≤ (V , V ) ≤ V , I = ±1mA
S
D
CC D
LT1380/LTC1393: V = 2.7V, V = 0V,
210
400
600
Ω
Ω
CC
EE
0V ≤ (V , V ) ≤ V , I = ±1mA
●
S
D
CC D
∆R vs V
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
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
V
V
V
V
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
V
2
V
CC
CC
= 5V
0.8
±1
20
V
I
I
I
0V ≤ V ≤ V
CC
µA
µA
µA
pF
IN
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
pF
t
t
t
Switch Turn-On Time from
Stop Condition
Figure 1 LTC1380: V = 5V, V = –5V
●
●
●
850
850
1130
1500
1500
2000
ns
ns
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
1200
1200
ns
ns
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
t
t
t
t
t
t
t
t
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
µs
µs
µs
ns
ns
µs
µs
ns
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 VD
Off-Channel Input Leakage vs VS
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
V
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
= 0V
V
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 VS
On-Channel Output Leakage vs VD
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
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
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
V
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
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
V
= 2.7V
= 0V
CC
V
V
= 5V
= 0V
CC
V
CC
EE
= 2.5V
V
EE
V
EE
= 1.35V
D
V
S
D
V
V
= 2.7V
EE
= 1.35V
10
1
10
1
10
1
CC
V
= 0V
V
V
V
= 5V
CC
EE
S
V
EE
V
= 5V
CC
= –5V
D
V
= 5V
= 0V
CC
EE
= 2.5V
V
= –5V
= 0V
= 0V
V
D
V
= 5V
= 0V
V
D
0.1
0.1
0.1
CC
EE
= 2.5V
V
V
V
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
0.0001
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
U W
TYPICAL PERFOR A CE CHARACTERISTICS
(Note 5)
Off Time vs Temperature
On Time vs Temperature
QINJ vs VC (Figure 3)
800
1600
5.0
T
= 25°C
V
= 2.7V
EE
= 1.35V
V
= 5V
A
CC
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
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
CC
EE
= 2.5V
V
V
500
400
300
200
100
1000
800
600
400
200
V
S
S
V
= 5V
= 0V
CC
EE
V
V
= 2.5V
S
V
V
= 5V
= 0V
CC
EE
V
CC
V
EE
= 2.7V
= 0V
0
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)
TEMPERATURE (°C)
V (V)
C
1380/93 G10
1380/93 G11
1380/93 G12
Off-Channel Isolation vs Input
Common Mode Voltage (Figure 2)
QINJ vs 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
V
= 5V
= 0V
CC
EE
V
V
= 2.7V
= 0V
CC
EE
V
S
V
V
= 5V
= –5V
CC
EE
V
= 5V
= 0V
= 2.5V
CC
EE
V
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
ICC vs Temperature
IEE vs Temperature
10
9
8
7
6
5
4
3
2
1
0
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
–25
TEMPERATURE (°C)
TEMPERATURE (°C)
1380/93 G15
1380/93 G16
5
LTC1380/LTC1393
U
U
U
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
twopinstoeitherVCC orGNDtoselectoneoffourpossible
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.
DO/DO (Pin9):AnalogMultiplexerOutputfortheLTC1380.
Positive Differential Analog Multiplexer Output for the
LTC1393.
VEE/DO– (Pin 10): Negative Supply Pin for the LTC1380.
Negative Differential Multiplexer Output for the LTC1393.
For the LTC1380, VEE should 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.
VCC (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
D
1.5V
0.4V
C
L
R
L
1V
1V
1V
35pF
1k
t
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 tON/tOFF Propagation 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
D
AC VOLTAGE COMPONENTS
AT S AND D
V
S
R
L
200mV
P-P
1k
100kHz
V
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
D
1.5V
0.4V
C
L
SDA
V
C
1000pF
V
C
∆V
∆V
V
D
D
D
1380/93 F03
Figure 3. Charge Injection Test
7
LTC1380/LTC1393
W U
W
TI I G DIAGRA
ADDRESS BYTE
COMMAND BYTE
t
t
f
t
r
HIGH
S
S
P
SCL
t
t
t
t
t
t
HD:STA
LOW
SU:DAT
SU:STA
SU:STO
HD:DAT
SDA FROM
HOST
1
0
0
1
*
A1 A0
0
X
X
X
X
EN C2
C1 C0
t
*0 FOR LTC1380, 1 FOR LTC1393
BUF
SDA FROM
LTC1380/LTC1393
t
OFF
ON
t
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.TheminimumVCCsupplyfortheLTC1380/LTC1393
is 2.7V. The maximum supply voltage (VCC to VEE for the
LTC1380, VCC for the LTC1393) should not exceed 14V.
The multiplexer switches operate within the entire power
supply range. The LTC1380 VCC and VEE supplies 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
0
1
0
A1 A0
W
A
A
X
X
X
X
X
X
EN C2 C1 C0
A
A
P
P
LTC1393 Send Byte Protocol
S
1
0
0
1
1
A1 A0
W
X
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
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
CHANNEL STATUS
All Off
S0
All Off
+
–
–
–
–
1
S0 , S0
At VCC supply 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
VCC = 5V.
1
0
0
1
S1
+
1
0
1
0
S2
S1 , S1
1
0
1
1
S3
+
1
1
0
0
S4
S2 , S2
1
1
0
1
S5
+
1
1
1
0
S6
S3 , S3
1
1
1
1
S7
U
TYPICAL APPLICATIONS
Simplified LTC1393 Application
5V
SMBus
HOST
1
2
3
4
5
6
7
8
16
+
0.1µF
15k
15k
S0
S0
S1
S1
S2
S2
S3
S3
V
CC
15
14
13
12
11
10
9
–
SCL
SDA
A0
SCL
SDA
+
–
+
–
+
–
4 DIFFERENTIAL
ANALOG INPUTS
LTC1393
A1
GND
–
D
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
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
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
15k
S0
V
CC
2
3
4
5
6
7
8
S0
S1
S1
S2
S2
S3
S3
SCL
SDA
A0
SCL
SDA
LTC1393
A1
GND
–
D
D
O
+
O
8 DIFFERENTIAL
ANALOG INPUTS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
+
–
+
–
+
–
+
–
S0
S0
S1
S1
S2
S2
S3
S3
V
CC
SCL
SDA
A0
4.7µF
LTC1393
A1
LTC1286
1
2
3
4
8
7
6
5
GND
–
V
V
REF
CC
SERIAL CLOCK IN
D
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
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