FEATURES
■
Low RON: 45Ω
■
Single 2.7V to ±5V Supply Operation
■
Low Charge Injection
■
Serial Digital Interface
■
Analog Inputs May Extend to Supply Rails
■
Low Leakage: ±5nA Max
■
Guaranteed Break-Before-Make
■
TTL/CMOS Compatible for All Digital Inputs
■
Cascadable to Allow Additional Channels
■
Can Be Used as a Demultiplexer
U
APPLICATIO S
■
Data Acquisition Systems
■
Communication Systems
■
Signal Multiplexing/Demultiplexing
LTC1391
8-Channel
Analog Multiplexer with
Cascadable Serial Interface
U
DESCRIPTIO
The LTC®1391 is a high performance CMOS 8-to-1 analog
multiplexer. It features a serial digital interface that allows
several LTC1391s to be daisy-chained together, increasing the number of MUX channels available using a single
digital port.
The LTC1391 features a typical RON of 45Ω, a typical
switch leakage of 50pA and guaranteed break-beforemake operation. Charge injection is ±10pC maximum. All
digital inputs are TTL and CMOS compatible when operated from single or dual supplies. The inputs can withstand 100mA fault current.
The LTC1391 is available in 16-pin PDIP, SSOP and
narrow SO packages. For applications requiring 2-way
serial data transmission, see the LTC1390 data sheet.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
3V, 8-Channel 12-Bit ADC
ANALOG
INPUTS
SERIAL INTERFACE
TO MUX AND ADC
1
S0
2
S1
3
S2
4
S3
LTC1391
5
S4
6
S5
7
S6
8
S7
DATA IN
DATA OUT
D
GND
CLK
OUT
D
CLK
CS
16
+
V
15
D
14
–
V
13
12
IN
11
CS
10
9
U
0.1µF
OPTIONAL A/D
INPUT FILTER
On-Resistance vs
3V
300
1391 TA01
1µF
250
200
150
100
ON-RESISTANCE (Ω)
50
0
–5 –4 –2 0 2 4
1
V
REF
2
+IN
LTC1285
3
–IN
4
GND
CS/SHDN
8
V
CC
7
CLK
6
D
OUT
5
Analog Input Voltage
TA = 25°C
V+ = 5V
–
= –5V
V
–3 –1 1 3
ANALOG INPUT VOLTAGE (V)
V+ = 2.7V
–
= 0V
V
5
1391 TA02
sn1391 1391fas
1
LTC1391
WWWU
ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
UU
W
(Note 1)
Total Supply Voltage (V+ to V–) .............................. 15V
Input Voltage
Analog Inputs/Outputs ..... (V– – 0.3V) to (V+ + 0.3V)
Digital Inputs .........................................– 0.3V to 15V
Digital Outputs ..........................–0.3V to (V+ + 0.3V)
Power Dissipation.............................................. 500mW
Operating Temperature Range
LTC1391C ............................................... 0°C to 70°C
LTC1391I........................................... –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
S0
S1
S2
S3
S4
S5
S6
S7
GN PACKAGE
16-LEAD PLASTIC SSOP
T
JMAX
T
JMAX
T
JMAX
Consult LTC Marketing for parts specified with wider operating temperature ranges.
TOP VIEW
1
2
3
4
5
6
7
8
S PACKAGE
16-LEAD PLASTIC SO
= 125°C, θJA = 110°C/ W (GN)
= 125°C, θJA = 70°C/W (N)
= 125°C, θJA = 100°C/ W (S)
16
15
14
13
12
11
10
9
N PACKAGE
16-LEAD PDIP
+
V
D
–
V
D
OUT
DIN
CS
CLK
GND
ORDER PART
NUMBER
LTC1391CGN
LTC1391CN
LTC1391CS
LTC1391IGN
LTC1391IN
LTC1391IS
GN PART MARKING
1391
1391I
temperature range, otherwise specifications are at TA = 25°C. V+ = 5V, V– = –5V, GND = 0V, unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Switch
V
ANALOG
R
ON
I
S(OFF)
I
D(OFF)
I
D(ON)
Digital
V
INH
V
INL
I
INL
V
OH
V
OL
Analog Signal Range (Note 2) ● –5 5 V
On-Resistance VS = ±3.5V, ID = 1mA T
∆RON vs V
∆RON vs Temperature 0.5 %/°C
Off Input Leakage VS = 4V, VD = –4V, VS = –4V, VD = 4V ±0.05 ±5nA
Off Output Leakage VS = 4V, VD = –4V, VS = –4V, VD = 4V ±0.05 ±5nA
On Channel Leakage VS = VD = ±4V ±0.05 ±5nA
High Level Input Voltage V+ = 5.25V ● 2.4 V
Low Level Input Voltage V+ = 4.75V ● 0.8 V
, I
Input Current VIN = 5V, 0V ● ±5 µA
INH
High Level Output Voltage V+ = 4.75V, IO = –10µA 4.74 V
Low Level Output Voltage V+ = 4.75V, IO = 1.6mA ● 0.5 0.8 V
S
Channel Off
Channel Off
Channel On
+
= 4.75V, IO = –360µA ● 2.4 4.50 V
V
= 0°C (LTC1391C) 75 Ω
MIN
T
= –40°C (LTC1391I)
MIN
25°C4575Ω
T
= 70°C (LTC1391C) 120 Ω
MAX
= 85°C (LTC1391I)
T
MAX
20 %
● ±20 nA
● ±20 nA
● ±20 nA
2
sn1391 1391fas
LTC1391
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. V+ = 5V, V– = –5V, GND = 0V, unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Dynamic
f
CLK
t
ON
t
OFF
t
OPEN
OIRR Off Isolation VS = 2V
Q
INJ
C
S(OFF)
C
D(0FF)
Clock Frequency (Note 2) 5 MHz
Enable Turn-On Time VS = 2.5V, RL = 1k, CL = 35pF 260 400 ns
Enable Turn-Off Time VS = 2.5V, RL = 1k, CL = 35pF 100 200 ns
Break-Before-Make Interval 35 155 ns
, RL = 1k, f = 100kHz 70 dB
P–P
Charge Injection RS = 0, CL = 1000pF, VS = 1V (Note 2) ±2 ±10 pC
Input Off Capacitance 5pF
Output Off Capacitance 10 pF
Supply
+
I
–
I
Positive Supply Current All Logic Inputs Tied Together, VIN = 0V or 5V ● 15 40 µA
Negative Supply Current All Logic Inputs Tied Together, VIN = 0V or 5V ● –15 –40 µA
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
V+ = 2.7V, V– = GND = 0V, unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Switch
V
ANALOG
R
ON
I
S(OFF)
I
D(OFF)
I
D(ON)
Digital
V
INH
V
INL
I
INL
V
OH
V
OL
Analog Signal Range (Note 2) ● 0 2.7 V
On-Resistance VS = 1.2V, IO = 1mA T
= 0°C (LTC1391C) 300 Ω
MIN
T
= –40°C (LTC1391I)
MIN
25°C 250 300 Ω
T
= 70°C (LTC1391C) 350 Ω
MAX
= 85°C (LTC1391I)
T
MAX
∆RON vs V
S
20 %
∆RON vs Temperature 0.5 %/°C
Off Input Leakage VS = 2.5V, VD = 0.5V; VS = 0.5V, VD = 2.5V (Note 3) ±0.05 ±5nA
Channel Off
● ±20 nA
Off Output Leakage VS = 2.5V, VD = 0.5V; VS = 0.5V, VD = 2.5V (Note 3) ±0.05 ±5nA
Channel Off
● ±20 nA
On Channel Leakage VS = VD = 0.5V, 2.5V (Note 3) ±0.05 ±5nA
Channel On
● ±20 nA
High Level Input Voltage V+ = 3.0V ● 2.0 V
Low Level Input Voltage V+ = 2.4V ● 0.8 V
, I
Input Current VIN = 2.7V, 0V ● ±5 µA
INH
High Level Output Voltage V+ = 2.7V, IO = –20µA 2.68 V
Low Level Output Voltage V+ = 2.7V, IO = 20µA 0.01 V
+
= 2.7V, IO = –400µA ● 2.0 2.30 V
V
+
V
= 2.7V, IO = 400µA ● 0.20 0.8 V
sn1391 1391fas
3
LTC1391
TEMPERATURE (°C)
–40
OUTPUT VOLTAGE (V)
0.65
0.60
0.55
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
60
1391 G03
–20
020
40
80
V+ = 5V
V
–
= –5V
I
O
= 1.8mA
V+ = 2.7V
V
–
= 0V
I
O
= 400µA
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. V+ = 2.7V, V– = GND = 0V, unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Dynamic
f
CLK
t
ON
t
OFF
t
OPEN
QIRR Off Isolation VS = 2V
Q
INJ
C
S(OFF)
C
D(OFF)
Clock Frequency (Note 2) 5 MHz
Enable Turn-On Time VS = 1.5V, RL = 1k, CL = 35pF (Note 4) 490 800 ns
Enable Turn-Off Time VS = 1.5V, RL = 1k, CL = 35pF (Note 4) 190 400 ns
Break-Before-Make Interval (Note 4) 125 290 ns
, RL = 1k, f = 100kHz 70 dB
P–P
Charge Injection RS = 0, CL = 1000pF, VS = 1V (Note 2) ±1 ±5pC
Input Off Capacitance 5pF
Output Off Capacitance 10 pF
Supply
+
I
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Guaranteed by Design.
Positive Supply Current All Logic Inputs Tied Together, VIN = 0V or 2.7V ● 0.2 2 µA
Note 3: Leakage current with a single 2.7V supply is guaranteed by
correlation with the ±5V leakage current specifications.
Note 4: Timing specifications with a single 2.7V supply are guaranteed by
correlation with the ±5V timing specifications.
UW
TYPICAL PERFOR A CE CHARACTERISTICS
300
250
200
150
100
ON-RESISTANCE (Ω)
50
0
4
On-Resistance vs Temperature
V+ = 2.7V
–
= 0V
V
= 1.2V
V
S
V+ = 5V
–
= –5V
V
= 0V
V
S
–40 –20
20 40 60
0
TEMPERATURE (°C)
80
1391 G01
Driver Output Low Voltage
vs Output Current
1.2
TA = 25°C
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
OUTPUT VOLTAGE (V)
0.3
0.2
0.1
0
0.2 0.6
0.4
0
OUTPUT CURRENT (mA)
1.0 2.01.8
0.8
V+ = 2.7V
–
= 0V
V
V+ = 5V
–
= –5V
V
1.4
1.2
Driver Output Low Voltage
vs Temperature
1.6
1391 G02
sn1391 1391fas
UW
TYPICAL PERFOR A CE CHARACTERISTICS
LTC1391
Driver Output High Voltage
vs Output Current
0
–0.5
–1.0
–1.5
–2.0
–2.5
OUTPUT CURRENT (mA)
–3.0
–3.5
–4.0
V+ = 2.7V
V
2.0 2.5
–
= 0V
V+ = 5V
–
= –5V
V
3.0 4.03.5
OUTPUT VOLTAGE (V)
TA =25°C
4.5
1391 G04
5.0
UUU
PIN FUNCTIONS
S0, S1, S2, S3, S4, S5, S6, S7 (Pins 1, 2, 3, 4, 5, 6, 7,
8): Analog Multiplexer Inputs.
Driver Output High Voltage
vs Temperature
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
OUTPUT VOLTAGE (V)
1.0
0.5
0
–20
–40
V+ = 5V
–
V
= –5V
= 1.6mA
I
O
V+ = 2.7V
–
= 0V
V
= 400µA
I
O
020
TEMPERATURE (°C)
40
60
80
1391 G05
DIN (Pin 12): Digital Input (TTL/CMOS Compatible). Input
for the channel selection bits.
GND (Pin 9): Digital Ground. Connect to system ground.
CLK (Pin 10): System Clock (TTL/CMOS Compatible). The
clock synchronizes the channel selection bits and the
serial data transfer from DIN to D
OUT
.
CS (Pin 11): Channel Select Input (TTL/CMOS Compatible). A logic high on this input enables the LTC1391 to
read in the channel selection bits and allows digital data
transfer from DIN to D
D
into three-state and enables the selected channel for
OUT
. A logic low on this input puts
OUT
analog signal transmission.
D
(Pin 13): Digital Output (TTL/CMOS Compatible).
OUT
Output from the internal shift register.
V– (Pin 14): Negative Supply. For ±5V dual supply appli-
cations, |V– | should not exceed |V+|by more than 20% for
proper channel selection.
D (Pin 15): Analog Multiplexer Output.
V+ (Pin 16): Positive Supply.
sn1391 1391fas
5
LTC1391
U
WUU
APPLICATIONS INFORMATION
Multiplexer Operation
Figure 1 shows the block diagram of the components
within the LTC1391 required for MUX operation. The
LTC1391 uses DIN to select the active channel and the chip
select input, CS, to switch on the selected channel as
shown in Figure 2.
When CS is high, the input data on the DIN pin is latched
into the 4-bit shift register on the rising clock edge. The
input data consists of the “EN” bit and a string of three bits
for channel selection. If “EN” bit is logic high as illustrated
in the first input data sequence, it enables the selected
channel. After the clocking in of the last channel selection
bit B0, the CS pin must be pulled low before the next rising
clock edge to ensure correct operation. Once CS is pulled
low, the previously selected channel is switched off to
ensure a break-before-make interval. After a delay of tON,
the selected channel is switched on allowing signal transmission. The selected channel remains on until the next
falling edge of CS. After a delay of t
terminates the analog signal transmission and allows the
CLK
D
IN
CS
CONTROL
LOGIC
4-BIT SHIFT
REGISTER
, the LTC1391
OFF
selection of next channel. If the “EN” bit is logic low, as
illustrated in the second data sequence, it disables all
channels and there will be no analog signal transmission.
Table 1 shows the various bit combinations for channel
selection.
Table 1. Logic Table for Channel Selection
ACTIVE CHANNEL EN B2 B1 BO
All Off 0 X X X
S0 1 0 0 0
S1 1 0 0 1
S2 1 0 1 0
S3 1 0 1 1
S4 1 1 0 0
S5 1 1 0 1
S6 1 1 1 0
S7 1 1 1 1
Digital Data Transfer Operation
The block diagram of Figure 3 shows the components
within the LTC1391 required for serial data transfer. When
CS is held high, data is fed into the 4-bit shift register and
then shifted to D
. Data appears at D
OUT
after the fourth
OUT
rising edge of the clock as shown in Figure 4. The last four
ANALOG INPUTS
(S0 TO S7)
MUX
BLOCK
ANALOG
OUTPUT (D)
1391 • F01
Figure 1. Simplified Block Diagram of the MUX Operation
CLK
CS
D
ANY ANALOG
INPUT
IN
D
EN
HIGH
B2
t
ON
Figure 2. Multiplexer Operation
CLK
D
IN
CS
CONTROL
LOGIC
4-BIT SHIFT
REGISTER
Figure 3. Simplified Block Diagram of the
Digital Data Transfer Operation
EN LO
B2 B1 B0B1 B0
t
OFF
D
OUT
1391 F03
1391 • F02
sn1391 1391fas
6
LTC1391
U
WUU
APPLICATIONS INFORMATION
bits clocked into the LTC1391 shift register before CS is
taken low select the MUX channel that is turned on. This
allows a series of devices, with the D
connected to the DIN of the next device, to be programmed
with a single data stream.
D
CLK
D
OUT
IN
1234
D3 D4 D5
D2D1
D2D1
Figure 4. Digital Data Transfer Operation
Multiplexer Expansion
Several LTC1391s can be daisy-chained to expand the
number of multiplexer inputs. No additional interface
ports are required for the expansion. Figure 5 shows two
LTC1391s connected at their analog outputs to form a
16-to-1 multiplexer at the input to an LTC1400 A/D converter.
of one device
OUT
D3 D4 D5
1391 • F04
To ensure that only one channel is switched on at any one
time, two sets of channel selection bits are needed for
DATA as shown in Figure 6. The first data sequence is used
to switch off one MUX and the second data sequence is
used to select one channel from the other MUX or
vice versa. In other words, if bit “ENA” is high and bit
“ENB” is low, one channel of MUX A is switched on and all
channels of MUX B are switched off. If bit “ENA” is low and
bit “ENB” is high, all channels at MUX A are switched off
and one channel of MUX B is switched on. Care should be
taken to ensure that only one LTC1391 is enabled at any
one time to prevent two channels from being enabled
simultaneously.
CLK
D
CS
IN
12345678
ENA A2 A1 A0 ENB
B2 B1 B0
Figure 6. Data Sequence for MUX Expansion
1391 • F06
ANALOG
INPUTS
ANALOG
INPUTS
5V
0.1µF
1
S0
2
S1
3
S2
4
S3
LTC1391
5
S4
S5
S6
S7
S0
S1
S2
S3
S4
S5
S6
S7
A
LTC1391
B
6
7
8
1
2
3
4
5
6
7
8
D
CLK
GND
D
CLK
GND
OUT
D
OUT
D
16
+
V
15
D
14
–
V
13
12
IN
11
CS
10
9
16
+
V
15
D
14
–
V
13
12
IN
11
CS
10
9
–5V
0.1µF
OPTIONAL A/D
INPUT FILTER
+
0.1µF
1
V
CC
2
A
IN
LTC1400
3
V
+
10µF
0.1µF
REF
4
GND
V
CONV
CLK
D
OUT
8
SS
7
6
5
10µF
+
5V
10µF
–5V
0.1µF
DATA
OUT
DATA IN
CS
CLK
1391 • F05
Figure 5. Daisy-Chaining Two LTC1391s for Expansion
sn1391 1391fas
7
LTC1391
U
TYPICAL APPLICATIONS
Daisy-Chaining Five LTC1391s
ANALOG
INPUTS
ANALOG
INPUTS
ANALOG
INPUTS
0.1µF BYPASS CAPACITORS FROM
+
TO GND FOR EACH LTC1391
V
1
S0
2
S1
3
S2
LTC1391
4
S3
S4
S5
S6
S7
S0
S1
S2
S3
S4
S5
S6
S7
S0
S1
S2
S3
S4
S5
S6
S7
A
LTC1391
B
LTC1391
C
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
D
CLK
GND
D
CLK
GND
D
CLK
GND
OUT
D
OUT
D
OUT
D
16
+
V
15
D
14
–
V
13
12
IN
11
CS
10
9
16
+
V
15
D
14
–
V
13
12
IN
11
CS
10
9
16
+
V
15
D
14
–
V
13
12
IN
11
CS
10
9
5V
1
V
REF
2
+IN
LTC1286
3
–IN
4
GND
8
V
CC
7
CLK
6
D
OUT
5
CS
0.1µF
DATA
OUT
8
ANALOG
INPUTS
ANALOG
INPUTS
1
S0
2
S1
3
S2
LTC1391
4
S3
S4
S5
S6
S7
S0
S1
S2
S3
S4
S5
S6
S7
D
LTC1391
E
5
6
7
8
1
2
3
4
5
6
7
8
D
CLK
GND
D
CLK
GND
OUT
D
OUT
D
16
+
V
15
D
14
–
V
13
12
IN
11
CS
10
9
16
+
V
15
D
14
–
V
13
12
IN
11
CS
10
9
DATA IN
CS
CLK
1391 TA04
sn1391 1391fas
PACKAGE DESCRIPTIO
U
GN Package
16-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
0.189 – 0.196*
16
15
(4.801 – 4.978)
14
12 11 10
13
LTC1391
0.009
(0.229)
9
REF
0.015
± 0.004
(0.38 ± 0.10)
0.007 – 0.0098
(0.178 – 0.249)
0.016 – 0.050
(0.406 – 1.270)
* 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
0° – 8° TYP
× 45°
0.229 – 0.244
(5.817 – 6.198)
0.053 – 0.068
(1.351 – 1.727)
0.008 – 0.012
(0.203 – 0.305)
12
0.150 – 0.157**
(3.810 – 3.988)
5
4
3
678
0.0250
(0.635)
BSC
0.004 – 0.0098
(0.102 – 0.249)
GN16 (SSOP) 1098
sn1391 1391fas
9
LTC1391
PACKAGE DESCRIPTIO
U
N Package
16-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
16
0.255 ± 0.015*
(6.477 ± 0.381)
1
0.770*
(19.558)
MAX
14
15
2
3
12
13
4
11
6
5
910
8
7
0.300 – 0.325
(7.620 – 8.255)
0.009 – 0.015
(0.229 – 0.381)
+0.035
0.325
–0.015
+0.889
8.255
()
–0.381
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
0.020
(0.508)
MIN
0.130 ± 0.005
(3.302 ± 0.127)
0.125
(3.175)
MIN
0.100
(2.54)
BSC
0.045 – 0.065
(1.143 – 1.651)
0.065
(1.651)
TYP
0.018 ± 0.003
(0.457 ± 0.076)
N16 1098
10
sn1391 1391fas
PACKAGE DESCRIPTIO
U
S Package
16-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
0.386 – 0.394*
(9.804 – 10.008)
13
16
14
15
12
LTC1391
11
10
9
0.010 – 0.020
(0.254 – 0.508)
0.008 – 0.010
(0.203 – 0.254)
*
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
× 45°
0° – 8° TYP
0.016 – 0.050
(0.406 – 1.270)
0.228 – 0.244
(5.791 – 6.197)
0.053 – 0.069
(1.346 – 1.752)
0.014 – 0.019
(0.355 – 0.483)
TYP
0.150 – 0.157**
(3.810 – 3.988)
4
5
0.050
(1.270)
BSC
3
2
1
7
6
8
0.004 – 0.010
(0.101 – 0.254)
S16 1098
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
sn1391 1391fas
11
LTC1391
TYPICAL APPLICATIO
U
Interfacing LTC1391 with LTC1257 for Demultiplex Operation
ANALOG
OUTPUTS
TTL COMPATIBLE
+
= 5V
AT V
RELATED PARTS
D
OUT
CLK
GND
DATA
CLK
16
+
V
15
D
14
–
V
13
12
D
IN
11
CS
10
9
CS
47k
OPTIONAL D/A
OUTPUT FILTER
1
CLK
2
D
IN
LTC1257
3
LOAD
4
D
OUT
V
V
GND
V
OUT
REF
8
CC
7
6
5
0.1µF
0.1µF
1391 TA03
5V ≤ V+ ≤ 12V
1
S0
2
S1
3
S2
4
S3
LTC1391
5
S4
6
S5
7
S6
8
S7
PART NUMBER DESCRIPTION COMMENTS
LTC1285 3V 12-Bit ADC Micropower, Auto Shutdown, SO-8 Package, SPI, QSPI + MICROWIRE
TM
Compatible
LTC1286 5V 12-Bit ADC Micropower, Auto Shutdown, SO-8 Package, SPI, QSPI + MICROWIRE Compatible
LTC1380/LTC1393 SMBus-Controlled Analog Multiplexer Low RON and Low Charge Injection
LTC1390 Serial-Controlled 8-to-1 Analog Multiplexer Low RON, Bidirectional Serial Interface, Low Power, 16-Pin SO
LTC1401 3V, 12-Bit, 200ksps Serial ADC 15mW, Internal Reference, SO-8 Package
LTC1402 12-Bit, 2.2Msps Serial ADC 90mW with Nap and Sleep Modes, 5V or ±5V, Internal Reference
LTC1404 12-Bit, 600ksps Serial ADC 5V or ±5V, Internal Reference and Shutdown
LTC1417 14-Bit, 400ksps Serial ADC 20mW, Single 5V or ±5V Supply
LTC1451 5V 12-Bit Voltage Output DAC Complete V
LTC1452 5V and 3V 12-Bit Voltage Output DAC Multiplying V
LTC1453 3V 12-Bit Voltage Output DAC Complete V
DAC, SO-8 Package, Daisy-Chainable, Low Power
OUT
DAC, SO-8 Package, Rail-to-Rail Output, Low Power
OUT
DAC, SO-8 Package, Daisy-Chainable, Low Power
OUT
LT1460-2.5 Micropower, Precision Bandgap Reference 130µA Supply Current, 10ppm/°C, Available in SOT-23
LT1461-2.5 Micropower, Low Dropout Reference 50µA Supply Current, 300mV Dropout, 3ppm/°C Drift
LTC1655/LTC1655L 16-Bit, Voltage Output DAC, 5V/3V SO-8 Package, Micropower, Serial I/O
LTC1658 14-Bit, Voltage Output DAC Micropower, Multiplying V
MICROWIRE is a trademark of National Semiconductor.
Linear Technology Corporation
12
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
, Swings from GND to V
OUT
REF
sn1391 1391fas
LT/TP 0701 1.5K REV A • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1995
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