1659 is a single supply, rail-to-rail voltage output,
12-bit digital-to-analog converter (DAC) in an MSOP pack-
age. It includes a rail-to-rail output buffer amplifier and an
easy-to-use 3-wire cascadable serial interface.
The LTC1659 output swings from 0V to REF. The REF input
can be tied to V
CC
which can range from 2.7V to 5.5V.
This allows a rail-to-rail output swing from 0V to V
CC
. The
LTC1659 draws only 250μA from a 5V supply.
Its guaranteed ±0.5LSB maximum DNL makes the LTC1659
excel in calibration, control and trim/adjust applications.
The low power supply current and the small MSOP
package make the LTC1659 ideal for battery-powered
applications.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Buffered True Rail-to-Rail Voltage Output
Maximum DNL Error: 0.5LSB
12-Bit Resolution
Supply Operation: 3V to 5V
Output Swings from 0V to V
REF
V
REF
Can Tie to V
CC
Schmitt Trigger On Clock Input Allows Direct
Optocoupler Interface
Power-On Reset Clears DAC to 0V
3-Wire Cascadable Serial Interface
Low Cost
8-Lead SO and MSOP Packages
APPLICATIONS
■
■
■
■
Digital Calibration
Industrial Process Control
Automatic Test Equipment
Cellular Telephones
TYPICAL APPLICATION
Functional Block Diagram: 12-Bit Rail-to-Rail DAC
2.7V TO 5.5V
8
V
CC
2 D
IN
1 CLK
μP
3 CS/LD
12-BIT
SHIFT
REG
AND
DAC
LATCH
6
REF
0.5
Differential Nonlinearity
vs Input Code
+
12-BIT
DAC
V
OUT
–
DNL ERROR (LSB)
7
RAIL-TO-RAIL
VOLTAGE
OUTPUT
0
4 D
OUT
TO
OTHER
DACS
POWER-ON
RESET
GND
5
1659 TA01
–0.5
0
512 1024 1536 2048 2560 3072 3584 4095
CODE
1659 TA02
1659fa
1
LTC1659
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V
CC
to GND ............................................... –0.5V to 7.5V
Logic Inputs to GND ................................. –0.5V to 7.5V
V
OUT
.................................................–0.5V to V
CC
+ 0.5V
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range................... –65°C to 150°C
Operating Temperature Range
LTC1659CS8 ............................................ 0°C to 70°C
LTC1659IS8 ......................................... –40°C to 85°C
LTC1659CMS8 ......................................... 0°C to 70°C
LTC1659IMS8 ...................................... –40°C to 85°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
PIN CONFIGURATION
TOP VIEW
CLK 1
D
IN
2
CS/LD 3
D
OUT
4
8
7
6
5
V
CC
V
OUT
REF
GND
TOP VIEW
CLK
D
IN
CS/LD
D
OUT
1
2
3
4
8
7
6
5
V
CC
V
OUT
REF
GND
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 125°C,
θ
JA
= 160°C/W
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 140°C/W
ORDER INFORMATION
LEAD FREE FINISH
LTC1659CS8#PBF
LTC1659IS8#PBF
LTC1659CMS8#PBF
LTC1659IMS8#PBF
TAPE AND REEL
LTC1659CS8#TRPBF
LTC1659IS8#TRPBF
LTC1659CMS8#TRPBF
LTC1659IMS8#TRPBF
PART MARKING*
1659
1659I
LTCK
LTCK
PACKAGE DESCRIPTION
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic MSOP
8-Lead Plastic MSOP
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 2.7V to 5.5V, V
OUT
unloaded, REF ≤ V
CC
, T
A
= T
MIN
to T
MAX
unless otherwise noted.
SYMBOL
DAC
Resolution
Monotonicity
DNL
INL
Differential Nonlinearity
Integral Nonlinearity
V
REF
≤ V
CC
– 0.1V (Note 2)
V
REF
≤ V
CC
– 0.1V (Note 2)
●
●
●
●
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
12
12
TYP
MAX
UNITS
Bits
Bits
±0.5
±5.0
±5.5
LSB
LSB
LSB
1659fa
2
LTC1659
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 2.7V to 5.5V, V
OUT
unloaded, REF ≤ V
CC
, T
A
= T
MIN
to T
MAX
unless otherwise noted.
SYMBOL
V
OS
V
OS
TC
V
FS
V
FS
TC
V
CC
I
CC
PARAMETER
Offset Error
Offset Error Temperature Coefficient
Full-Scale Voltage
Full-Scale Voltage Temperature Coefficient
Positive Supply Voltage
Supply Current
Short-Circuit Current Low
Short-Circuit Current High
Output Impedance to GND
Output Line Regulation
AC Performance
Voltage Output Slew Rate
Voltage Output Settling Time
Digital Feedthrough
Reference Input
R
IN
REF
Digital I/O
V
IH
V
IL
V
OH
V
OL
V
IH
V
IL
V
OH
V
OL
I
LEAK
C
IN
Digital Input High Voltage
Digital Input Low Voltage
Digital Output High Voltage
Digital Output Low Voltage
Digital Input High Voltage
Digital Input Low Voltage
Digital Output High Voltage
Digital Output Low Voltage
Digital Input Leakage
Digital Input Capacitance
V
CC
= 5V
V
CC
= 5V
V
CC
= 5V, I
OUT
= –1mA, D
OUT
Only
V
CC
= 5V, I
OUT
= 1mA, D
OUT
Only
V
CC
= 3V
V
CC
= 3V
V
CC
= 3V, I
OUT
= –1mA, D
OUT
Only
V
CC
= 3V, I
OUT
= 1mA, D
OUT
Only
V
IN
= GND to V
CC
(Note 7)
●
●
●
●
●
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
CONDITIONS
Measured at Code 20
●
MIN
TYP
MAX
±12
±18
UNITS
mV
mV
μV/°C
V
V
ppm/°C
±15
REF = 4.096V
●
4.070
4.060
4.095
4.095
10
4.120
4.130
Power Supply
For Specified Performance
(Note 5)
V
OUT
Shorted to GND
V
OUT
Shorted to V
CC
Input Code = 0
Input Code = 4095, V
CC
= 4.5V to 5.5V
(Note 3)
(Notes 3, 4) to ±0.5LSB
●
●
●
2.7
240
70
65
40
0.1
0.5
1.0
14
0.3
5.5
450
120
120
150
1.5
V
μA
mA
mA
Ω
LSB/V
V/μs
μs
nV • s
Op Amp DC Performance
●
●
●
REF Input Resistance
REF Input Range
(Notes 6, 7)
●
●
17
0
2.4
28
40
V
CC
kΩ
V
V
0.8
V
CC
– 1.0
0.4
2.0
0.6
V
CC
– 0.7
0.4
±10
10
V
V
V
V
V
V
V
μA
pF
1659fa
3
LTC1659
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 2.7V to 5.5V, V
OUT
unloaded, REF ≤ V
CC
, T
A
= T
MIN
to T
MAX
unless otherwise noted.
SYMBOL
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
8
t
9
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
8
t
9
PARAMETER
D
IN
Valid to CLK Setup
D
IN
Valid to CLK Hold
CLK High Time
CLK Low Time
⎯
C
⎯
S/LD Pulse Width
LSB CLK to
⎯
C
⎯
S/LD
⎯
C
⎯
S/LD Low to CLK
D
OUT
Output Delay
CLK Low to
⎯
C
⎯
S/LD Low
D
IN
Valid to CLK Setup
D
IN
Valid to CLK Hold
CLK High Time
CLK Low Time
⎯
C
⎯
S/LD Pulse Width
LSB CLK to
⎯
C
⎯
S/LD
⎯
C
⎯
S/LD Low to CLK
D
OUT
Output Delay
CLK Low to
⎯
C
⎯
S/LD Low
(Note 7)
(Note 7)
(Note 7)
(Note 7)
(Note 7)
C
LOAD
= 15pF
(Note 7)
(Note 7)
(Note 7)
(Note 7)
(Note 7)
(Note 7)
C
LOAD
= 15pF
(Note 7)
CONDITIONS
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
Switching (V
CC
= 4.5V to 5.5V
MIN
40
0
40
40
50
40
20
5
20
60
0
60
60
80
60
30
10
30
TYP
MAX
UNITS
ns
ns
ns
ns
ns
ns
ns
150
ns
ns
ns
ns
ns
ns
ns
ns
ns
Switching (V
CC
= 2.7V to 5.5V)
220
ns
ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
Nonlinearity is defined from code 20 to code 4095 (full scale). See
Applications Information.
Note 3:
Load is 5kΩ in parallel with 100pF.
Note 4:
DAC switched between all 1s and the code corresponding to V
1. Introduction
Electronic scales are gradually replacing traditional measuring tools like springs and balances in everyday life, such as electronic price computing scales and electronic weigh...[详细]
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