LTC1380/LTC1393 CMOS analog multiplexers with SMBus® compatible digita
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LTC1380/LTC1393 Single-Ended 8-Channel/ Differential 4-Channel Analog Multiplexer with SMBus Interface
LTC1380/LTC1393 CMOS analog multiplexers with SMBus® compatible digital interfaces. LTC1380 single-ended 8-channel multiplexer, while LTC1393 differential 4-channel multiplexer. SMBus digital interface requires only wires (SCL SDA). Both LTC1380 LTC1393 have four hard-wired SMBus addresses, selectable with external address pins. This allows four devices, each with unique SMBus address, coexist system four devices synchronized with stop bit. supply current typically 10µA. Both digital interface pins SMBus compatible over full operating supply voltage range. LTC1380 analog switches feature typical (±5V supplies), typical switch leakage 20pA guaranteed break-before-make operation. Charge injection ±1pC typical. LTC1380/LTC1393 available 16-lead packages. Operation fully specified over commercial industrial temperature ranges.
registered trademarks Linear Technology Corporation. SMBus registered trademark Intel Corporation.
Micropower Operation: Supply Current 20µA 2-Wire SMBus Interface Single 2.7V Supply Operation Expandable Single Differential Channels Guaranteed Break-Before-Make RON: Single Ended/70 Differential Charge Injection: 20pC Leakage: ±5nA Available 16-Lead Packages
APPLICATIONS
Data Acquisition Systems Process Control Laptop Computers Signal Multiplexing/Demultiplexing Analog-to-Digital Conversion Systems
TYPICAL APPLICATION
LTC1380 Single-Ended 8-Channel Multiplexer
Resistance
25°C 2.7V
SMBus HOST
ANALOG INPUTS
RESISTANCE
LTC1380
0.1µF
0.1µF ANALOG OUTPUT
1380/93 TA01
1167
LTC1380/LTC1393
ABSOLUTE MAXIMUM RATINGS
(Note
Total Supply Voltage LTC1380 (VCC VEE) LTC1393 (VCC GND) Analog Input Voltage LTC1380 0.3V 0.3V LTC1393 0.3V 0.3V Digital Inputs 0.3V LTC1380 (VCC VEE) (VEE 0.3V) (VEE 15V) LTC1393 (VCC GND) 0.3V
PACKAGE/ORDER INFORMATION
VIEW
ORDER PART NUMBER LTC1380CGN LTC1380CS LTC1380IGN LTC1380IS
PACKAGE PACKAGE 16-LEAD PLASTIC SSOP 16-LEAD PLASTIC
TJMAX 125°C, 130°C/ (GN) TJMAX 125°C, 100°C/
Consult factory Military grade parts.
ELECTRICAL CHARACTERISTICS
SYMBOL VANALOG PARAMETER Analog Signal Range Resistance CONDITIONS LTC1380 LTC1393
(Notes
LT1380: (VS, VCC, ±1mA LT1393: (VS, ±1mA LT1380/LTC1393: 2.7V, (VS, VCC, ±1mA
Temperature ILEAK Off-Channel On-Channel Switch Leakage
(VS, VCC, LTC1380: (VEE 0.5V) (VS, (VCC 0.5V) LTC1393: 0.5V (VS, (VCC 0.5V)
Maximum Switch-On Current 65mA Power Dissipation 500mW Operating Ambient Temperature Range LTC1380C/LTC1393C 70°C LTC1380I/LTC1393I 40°C 85°C Junction Temperature 125°C Storage Temperature Range 65°C 150°C Lead Temperature (Soldering, sec). 300°C
VIEW
ORDER PART NUMBER LTC1393CGN LTC1393CS LTC1393IGN LTC1393IS
PACKAGE PACKAGE 16-LEAD PLASTIC SSOP 16-LEAD PLASTIC
TJMAX 125°C, 130°C/ (GN) TJMAX 125°C, 100°C/
UNITS %/°C
±0.05
LTC1380/LTC1393
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER SCL, Input High Voltage SCL, Input Voltage Output Voltage Address Input High Voltage Address Input Voltage SCL, SDA, Address Input Current Positive Supply Current Negative Supply Current Input Capacitance Output Capacitance Switch Turn-On Time from Stop Condition Switch Turn-Off Time from Stop Condition Break-Before-Make Interval Off-Channel Isolation Charge Injection SMBus Operating Frequency Free Time Between Stop/Start Hold Time After (Repeated) Start Repeated Start Setup Time Stop Condition Setup Time Data Hold Time Data Setup Time Clock Period Clock High Period SCL/SDA Fall Time SCL/SDA Rise Time ISDA CONDITIONS
(Notes
UNITS
Digital Inputs LTC1380: Digital Inputs (Note (Note LTC1380 LTC1393 Figure LTC1380: LTC1393: LTC1380/LTC1393: 2.7V, Figure LTC1380: LTC1393: LTC1380/LTC1393: 2.7V, tOFF Figure 200mVP-P, 100kHz (Note Figure 1000pF (Note
1130
1500 1500 2000 1200 1200 1200
tOFF
tOPEN OIRR QINJ fSMB tBUF tHD:STA tSU:STA tSU:STO tHD:DAT tSU:DAT tLOW tHIGH
SMBus Timing (Note
1000
Time Interval Between 0.9VDD (VILMAX 0.15) Time Interval Between (VILMAX 0.15) (VIHMIN 0.15)
denotes specifications which apply over full operating temperature range. Note Absolute Maximum Ratings those values beyond which life device impaired. Note current into device pins positive; current device pins negative. voltages referenced ground unless otherwise specified. typicals given 25°C, (for both LTC1380 LTC1393) (LTC1380).
Note These typical parameters based bench measurements production tested. Note Both assume external pull-up resistor typical SMBus host power supply Note Typical curves with apply LTC1380. Curves with apply both LTC1380 LTC1393. Note These parameters guaranteed design tested production.
LTC1380/LTC1393 TYPICAL PERFOR CHARACTERISTICS
Resistance Temperature
0.0020 0.0018 0.0016
LEAKAGE (nA)
RESISTANCE
LEAKAGE (nA)
2.7V 1.35V 2.5V
TEMPERATURE (°C)
On-Channel Input Leakage
0.010 0.008 0.006 25°C 0.010 0.008 0.006
LEAKAGE (nA)
LEAKAGE (nA)
0.002 0.002 0.004 0.006 0.008
LEAKAGE (nA)
0.004 2.7V
0.010 -1.5
1380/93
Off-Channel Output Leakage Temperature
1000 0.01 0.001 0.0001 1000 0.01 0.001
LEAKAGE (nA)
2.5V
2.7V 1.35V
LEAKAGE (nA)
LEAKAGE (nA)
2.7V 1.35V
TEMPERATURE (°C)
(Note
Off-Channel Input Leakage
0.010 25°C 2.7V 0.008 0.006 0.004 0.002 0.002 0.004 0.006 0.008
Off-Channel Output Leakage
25°C
0.0014 0.0012 0.0010 0.0008 0.0006 0.0004 0.0002
2.7V
-1.5
1380/93
0.010 -1.5
1380/93
1380/93
On-Channel Output Leakage
25°C
Off-Channel Input Leakage Temperature
2.7V 1.35V 2.5V
0.004 0.002 0.002 0.004 0.006 0.008
2.7V
0.01
0.001 0.0001 TEMPERATURE (°C)
0.010 -1.5
1380/93
1380/93
On-Channel Input Leakage Temperature
1000 2.5V 0.01 0.001
On-Channel Output Leakage Temperature
2.7V 1.35V
2.5V
0.0001
TEMPERATURE (°C)
0.0001
TEMPERATURE (°C)
1380/93
1380/93
1380/93
LTC1380/LTC1393 TYPICAL PERFOR CHARACTERISTICS
Time Temperature
2.7V 1.35V 2.5V 1600 1400 1200
TIME (ns)
TIME (ns)
TEMPERATURE (°C)
2.5V
QINJ (pC)
QINJ Temperature (Figure
QINJ(pC)
OIRR (dB)
2.5V 2.7V 1.35V
Temperature
(µA)
TEMPERATURE (°C)
(nA)
2.7V
(Note QINJ (Figure
2.7V 25°C
Time Temperature
2.7V 1.35V
1000
TEMPERATURE (°C)
1380/93
1380/93
1380/93
Off-Channel Isolation Input Common Mode Voltage (Figure
25°C 200mVP-P, 100kHz 2.7V
TEMPERATURE (°C)
1380/93
1380/93
Temperature
-100
TEMPERATURE (°C)
1380/93
1380/93
LTC1380/LTC1393
FUNCTIONS
S7/S0 (Pin Single-Ended Analog Multiplexer Inputs LTC1380. Differential Analog Multiplexer Inputs LTC1393. DO/DO+ (Pin Analog Multiplexer Output LTC1380. Positive Differential Analog Multiplexer Output LTC1393. VEE/DO (Pin 10): Negative Supply LTC1380. Negative Differential Multiplexer Output LTC1393. LTC1380, should bypassed with 0.1µF ceramic capacitor when operating from split supplies connected single supply operation. (Pin 11): Ground Pin. (Pin 13): Address Selection Pins. these pins either select four possible addresses which LTC1380/LTC1393 will respond. (Pin 14): SMBus Bidirectional Digital Input/Output Pin. This open-drain output requires pullup resistor current source positive supply normal operation. Data shifted into acknowledged LTC1380/LTC1393 using this pin. (Pin 15): SMBus Clock Input. data shifted rising edges this clock during data transfer. (Pin 16): Positive Supply Pin. This should bypassed with 0.1µF ceramic capacitor.
BLOCK DIAGRA
ANALOG INPUTS (LTC1380: (LTC1393:
MULTIPLEXER SWITCHES
ANALOG OUTPUT(S) (LTC1380: (LTC1393: DO±)
4-BIT LATCH DECODER
SHIFT REGISTER
HOLD
ADDRESS COMPARATOR
SMBus STATE MACHINE
STOP
1380/93
LTC1380/LTC1393
TEST CIRCUITS
LTC1380 35pF
STOP CONDITION WITH 1.5V 0.4V 1.5V 0.4V
STOP CONDITION WITH
tOFF
1380/93
(VCC VEE)
20ns, 20ns
Figure Switch /tOFF Propagation Delay from SMBus STOP Condition
LTC1380 OIRR 20LOG10 WHERE VOLTAGE COMPONENTS
200mVP-P 100kHz (VCC VEE)
(VCC VEE)
1380/93
Figure Off-Channel Isolation (OIRR) Test
LTC1380
CHARGE INJECTION 1000pF
STOP CONDITION WITH 1.5V 0.4V 1.5V 0.4V
STOP CONDITION WITH
1380/93
Figure Charge Injection Test
LTC1380/LTC1393 DIAGRA
tHD:STA FROM HOST tBUF FROM LTC1380/LTC1393 tOPEN tLOW tSU:DAT tHD:DAT tSU:STA tSU:STO
APPLICATIONS INFORMATION
Theory Operation LTC1380/LTC1393 analog input multiplexers with SMBus digital interface. LTC1380 single-ended 8-to-1 multiplexer; LTC1393 differential 4-to-1 mulitplexer. LTC1380 operates either bipolar unipolar supplies, LTC1393 operates single supply. minimum supply LTC1380/LTC1393 2.7V. maximum supply voltage (VCC LTC1380, LTC1393) should exceed 14V. multiplexer switches operate within entire power supply range. LTC1380 supplies offset such 2.7V/-11V 11V/- Serial Interface LTC1380/LTC1393 serial interface supports SMBus send byte protocol shown below with interface signals, SDA.
LTC1380 Send Byte Protocol
LTC1393 Send Byte Protocol
ADDRESS BYTE COMMAND BYTE
SMBus START SMBus STOP (THE FIRST STOP AFTER SUCCESSFUL COMMAND BYTE UPDATES MULTIPLEXER CONTROL LATCH) ACKNOWLEDGE FROM LTC1380/LTC1393 WRITE COMMAND ADDRESS BITS MULTIPLEXER CONTROL BITS
ADDRESS BYTE tHIGH COMMAND BYTE LTC1380, LTC1393 tOFF
send byte protocol initiated SMBus host with start followed 7-bit address code write bit. Each slave compares address code with address. send byte write Low. selected slaves then reply with acknowledge pulling line Low. Next, host sends 8-bit command byte. When selected slave receives whole command byte, acknowledges retains command byte shift register. host terminate serial transfer with stop communicate with another slave device with repeat start. When repeat start occurs slave selected, command byte data kept shift register multiplexer control updated. multiplexer control latches command from shift register first stop after successful command byte transfer. This allows host synchronize several slave devices with single stop bit. select four possible LTC1380/LTC1393 addresses shown Table This allows four similar devices share same SMBus, expanding multiplexer single-ended channels with LTC1380; differential channels with LTC1393. first stop after successful send byte transfer will latch multiplexer control bits (EN, initiate break-before-make sequence.
LTC1380/LTC1393
APPLICATIONS INFORMATION
Table LTC1380/LTC1393 Address Selection
LTC1380 LTC1393
synchronizing clock generated host. bidirectional data transfer between host slave. host initiates start dropping line from High while High. stop initiated changing line from High while High. address, command acknowledge signals must valid should change while High. acknowledge signals host acceptance correct address byte command byte. supply above 2.7V, input threshold typically with input hysteresis 100mV. typical lines have either resistive current source pull-up host. LTC1380/LTC1393 have open-drain NMOS transistor sink below 0.4V during slave acknowledge sequence. address selection input compatible
TYPICAL APPLICATIONS
Simplified LTC1393 Application
DIFFERENTIAL ANALOG INPUTS
Both LTC1380 LTC1393 compatible with Philips/Signetics interface. This threshold should pose operational problem with applications. multiplexer switches selected shown Table Both LTC1380 LTC1393 have enable (EN). disables switches while High enables selected switch programmed bits stop after successful send byte sequence LTC1380/ LTC1393 will disable switches before selected switch connected.
Table Multiplexer Control Bits Truth Table
LTC1380 CHANNEL STATUS LTC1393 DO+, CHANNEL STATUS
LTC1393
0.1µF
SMBus HOST
DIFFERENTIAL ANALOG OUTPUTS
1380/93 TA03
LTC1380/LTC1393
TYPICAL APPLICATIONS
16-Channel Multiplexer with Buffer
ANALOG INPUTS
0.1µF
Programmable Gain Amplifier
LTC1380
0.1µF
LT1055 ANALOG INPUT VOUT
1380/93 TA05
LTC1380
0.1µF
SMBus HOST
LTC1380
LT1351
VOUT
1380/93 TA04
SMBus HOST
0.1µF
LTC1380/LTC1393
PACKAGE
0.007 0.0098 (0.178 0.249) 0.016 0.050 (0.406 1.270)
DIMENSION DOES INCLUDE MOLD FLASH. MOLD FLASH SHALL EXCEED 0.006" (0.152mm) SIDE DIMENSION DOES INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL EXCEED 0.010" (0.254mm) SIDE
0.010 0.020 (0.254 0.508) 0.008 0.010 (0.203 0.254)
0.016 0.050 0.406 1.270 *DIMENSION DOES INCLUDE MOLD FLASH. MOLD FLASH SHALL EXCEED 0.006" (0.152mm) SIDE **DIMENSION DOES INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL EXCEED 0.010" (0.254mm) SIDE
Information furnished Linear Technology Corporation believed accurate reliable. However, responsibility assumed use. Linear Technology Corporation makes representation that interconnection circuits described herein will infringe existing patent rights.
Dimensions inches (millimeters) unless otherwise noted.
Package 16-Lead Plastic SSOP (Narrow 0.150)
(LTC 05-08-1641)
0.189 0.196* (4.801 4.978)
0.229 0.244 (5.817 6.198)
0.150 0.157** (3.810 3.988)
0.015 0.004 (0.38 0.10) 0.053 0.068 (1.351 1.727)
0.004 0.0098 (0.102 0.249)
0.008 0.012 (0.203 0.305)
0.025 (0.635)
GN16 (SSOP) 1197
Package 16-Lead Plastic Small Outline (Narrow 0.150)
(LTC 05-08-1610)
0.386 0.394* (9.804 10.008)
0.228 0.244 (5.791 6.197)
0.150 0.157** (3.810 3.988)
0.053 0.069 (1.346 1.752)
0.004 0.010 (0.101 0.254)
0.014 0.019 (0.355 0.483)
0.050 (1.270)
0695
LTC1380/LTC1393
TYPICAL APPLICATION
Differential Channel Multiplexer with Converter
DIFFERENTIAL ANALOG INPUTS LTC1393 LTC1286 VREF DOUT CS/SHDN 4.7µF
RELATED PARTS
PART NUMBER LTC201A/LTC202/ LTC203 LTC221/LTC222 LTC1390/LTC1391 LTC1623 DESCRIPTION Micropower, Charge Injection, Quad CMOS Analog Switches with Data Latches Micropower, Charge Injection, Quad CMOS Analog Switches 8-Channel, Analog Multiplexer with Serial Interface High Side Switch with SMBus Interface COMMENTS Each Channel Independently Controlled Parallel Controlled with Data Latches 16-Pin PDIP Regulated On-Board Charge Pump Drives External N-Channel MOSFETS
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, 95035-7417 (408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977 www.linear-tech.com
LTC1393
0.1µF
SMBus HOST
SERIAL CLOCK SERIAL CLOCK
1380/93 TA06
138093f LT/GP 0398 PRINTED
LINEAR TECHNOLOGY CORPORATION 1998
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