LTC2602.pdf 데이터시트 (총 16 페이지) - 파일 다운로드 LTC2602 데이타시트 다운로드

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LTC2602/LTC2612/LTC2622
Dual 16-/14-/12-Bit
Rail-to-Rail DACs in 8-Lead MSOP
FEATURES
s Smallest Pin-Compatible Dual DACs:
LTC2602: 16-Bits
LTC2612: 14-Bits
LTC2622: 12-Bits
s Guaranteed 16-Bit Monotonic Over Temperature
s Wide 2.5V to 5.5V Supply Range
s Low Power Operation: 300µA per DAC at 3V
s Individual Channel Power-Down to 1µA, Max
s Ultralow Crosstalk between DACs (30µV)
s High Rail-to-Rail Output Drive (±15mA)
s Double-Buffered Data Latches
s Pin-Compatible 10-Bit Version (LTC1661)
s Tiny 8-Lead MSOP Package
U
APPLICATIO S
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s Mobile Communications
s Process Control and Industrial Automation
s Instrumentation
s Automatic Test Equipment
DESCRIPTIO
The LTC®2602/LTC2612/LTC2622 are dual 16-,14- and
12-bit, 2.5V-to-5.5V rail-to-rail voltage-output DACs, in a
tiny 8-lead MSOP package. They have built-in high per-
formance output buffers and are guaranteed monotonic.
These parts establish advanced performance standards
for output drive, crosstalk and load regulation in single-
supply, voltage output multiples.
The parts use a simple SPI/MICROWIRE™ compatible
3-wire serial interface which can be operated at clock
rates up to 50MHz.
The LTC2602/LTC2612/LTC2622 incorporate a power-
on reset circuit. During power-up, the voltage outputs
rise less than 10mV above zero scale, and after power-
up, they stay at zero scale until a valid write and update
take place.
, LTC and LT are registered trademarks of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
BLOCK DIAGRA
LTC2602
VOUT A 8
16-BIT
DAC A
GND 7
CS/LD 1
SCK 2
CONTROL
LOGIC
DECODE
24-BIT SHIFT REGISTER
16-BIT
DAC B
5 VOUT B
6 VCC
4 REF
3 SDI
2602 BD01
Differential Nonlinearity (DNL)(LTC2602)
1.0
VCC = 5V
0.8 VREF = 4.096V
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384
32768
CODE
49152 65535
2602 TA01
2602f
1

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LTC2602/LTC2612/LTC2622
ABSOLUTE AXI U RATI GS
(Note 1)
Any Pin to GND ........................................... – 0.3V to 6V
Any Pin to VCC ........................................................ –6V to 0.3V
Maximum Junction Temperature ......................... 125°C
Operating Temperature Range
LTC2602C/LTC2612C/LTC2622C .......... 0°C to 70°C
LTC2602I/LTC2612I/LTC2622I .......... – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................ 300°C
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
TOP VIEW
CS/LD 1
SCK 2
SDI 3
REF 4
8 VOUT A
7 GND
6 VCC
5 VOUT B
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 300°C/W
LTC2602CMS8
LTC2602IMS8
LTC2612CMS8
LTC2612IMS8
LTC2622CMS8
LTC2622IMS8
MS8 PART MARKING
LTACX
LTACY
LTACZ
LTADA
LTADB
LTADC
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
www.DataSheet4U.ctoemmperature range, otherwise specifications are at TA = 25°C. VCC = 2.5V to 5.5V, VREF VCC, VOUT unloaded, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
LTC2622
LTC2612
LTC2602
MIN TYP MAX MIN TYP MAX MIN TYP MAX
UNITS
DC Performance
Resolution
q 12 14 16
Bits
Monotonicity
VCC = 5V, VREF = 4.096V (Note 2) q 12
14
16
Bits
DNL Differential Nonlinearity VCC = 5V, VREF = 4.096V (Note 2) q
±0.5
±1
±1 LSB
INL Integral Nonlinearity
VCC = 5V, VREF = 4.096V (Note 2) q
±0.75 ±4
±3 ±16
±12 ±64
LSB
Load Regulation
VREF = VCC = 5V, Midscale
IOUT = 0mA to 15mA Sourcing
IOUT = 0mA to 15mA Sinking
q
q
0.025 0.125
0.05 0.125
0.1 0.5
0.2 0.5
0.4 2
0.65 2
LSB/mA
LSB/mA
VREF = VCC = 2.5V, Midscale
IOUT = 0mA to 7.5mA Sourcing
IOUT = 0mA to 7.5mA Sinking
q
q
0.05 0.25
0.1 0.25
0.2 1
0.4 1
0.9 4
1.3 4
LSB/mA
LSB/mA
ZSE Zero-Scale Error
VCC = 5V, VREF = 4.096V Code = 0 q
19
19
19
mV
VOS Offset Error
VCC = 5V, VREF = 4.096V, (Note 7) q
±1 ±9
±1 ±9
±1 ±9
mV
VOS Temperature
Coefficient
±5 ±5 ±5 µV/°C
GE Gain Error
Gain Temperature
Coefficient
VCC = 5V, VREF = 4.096V
q ±0.1 ±0.7 ±0.1 ±0.7 ±0.1 ±0.7 %FSR
±3 ±3 ±3 ppm/°C
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LTC2602/LTC2612/LTC2622
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 2.5V to 5.5V, VREF VCC, VOUT unloaded, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
LTC2602/LTC2612/LTC2622
MIN TYP MAX UNITS
PSRR
ROUT
Power Supply Rejection Ratio
DC Output Impedance
DC Crosstalk (Note 4)
VCC = 5V ±10%
VREF = VCC = 5V, Midscale; –15mA IOUT 15mA
VREF = VCC = 2.5V, Midscale; –7.5mA IOUT 7.5mA
Due to Full Scale Output Change (Note 5)
Due to Load Current Change
Due to Powering Down (per Channel)
q
q
–80 dB
0.05 0.15
0.05 0.15
±30 µV
±16 µV/mA
±4 µV
ISC Short-Circuit Output Current
VCC = 5.5V, VREF = 5.5V
Code: Zero Scale; Forcing Output to VCC
Code: Full Scale; Forcing Output to GND
q 15
q 15
34 60
38 60
mA
mA
VCC = 2.5V, VREF = 2.5V
Code: Zero Scale; Forcing Output to VCC
Code: Full Scale; Forcing Output to GND
q 7.5
q 7.5
20 50
28 50
mA
mA
Reference Input
Input Voltage Range
Resistance
Normal Mode
q0
q 44
VCC
64 80
V
k
Capacitance
23 pF
IREF Reference Current, Power Down Mode All DACs Powered Down
Power Supply
q
0.001
1
µA
VCC
ICC
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Positive Supply Voltage
Supply Current
Digital I/O
For Specified Performance
VCC = 5V (Note 3)
VCC = 3V (Note 3)
All DACs Powered Down (Note 3) VCC = 5V
All DACs Powered Down (Note 3) VCC = 3V
q 2.5
q
q
q
q
5.5
0.7 1.3
0.6 1
0.35 1
0.10 1
V
mA
mA
µA
µA
VIH Digital Input High Voltage
VIL Digital Input Low Voltage
ILK Digital Input Leakage
CIN Digital Input Capacitance
VCC = 2.5V to 5.5V
VCC = 2.5V to 3.6V
VCC = 4.5V to 5.5V
VCC = 2.7V to 5.5V
VCC = 2.5V to 5.5V
VIN = GND to VCC
(Note 6)
q 2.4
q 2.0
q
q
q
q
q
V
V
0.8 V
0.6 V
0.5 V
±1 µA
8 pF
SYMBOL PARAMETER
AC Performance
ts Settling Time (Note 8)
Settling Time for
1LSB Step (Note 9)
Voltage Output Slew Rate
Capacitive Load Driving
Glitch Impulse
Multiplying Bandwidth
en Output Voltage Noise
Density
Output Voltage Noise
CONDITIONS
±0.024% (±1LSB at 12 Bits)
±0.006% (±1LSB at 14 Bits)
±0.0015% (±1LSB at 16 Bits)
±0.024% (±1LSB at 12 Bits)
±0.006% (±1LSB at 14 Bits)
±0.0015% (±1LSB at 16 Bits)
At Midscale Transition
At f = 1kHz
At f = 10kHz
0.1Hz to 10Hz
LTC2622
LTC2612
LTC2602
MIN TYP MAX MIN TYP MAX MIN TYP MAX
UNITS
7 7 7 µs
9 9 µs
10 µs
2.7 2.7 2.7 µs
4.8 4.8 µs
5.2 µs
0.80 0.80 0.80 V/µs
1000 1000 1000 pF
12 12 12 nV • s
180 180 180 kHz
120 120 120 nV/Hz
100 100 100 nV/Hz
15 15 15 µVP-P
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LTC2602/LTC2612/LTC2622
WU
TI I G CHARACTERISTICS The q denotes specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. (See Figure 1) (Note 6)
SYMBOL PARAMETER
CONDITIONS
LTC2602/LTC2612/LTC2622
MIN TYP MAX UNITS
VCC = 2.5V to 5.5V
t1 SDI Valid to SCK Setup
q4
ns
t2 SDI Valid to SCK Hold
q4
ns
t3 SCK High Time
q9
ns
t4 SCK Low Time
t5 CS/LD Pulse Width
q9
q 10
ns
ns
t6 LSB SCK High to CS/LD High
q7
ns
t7 CS/LD Low to SCK High
q7
ns
t10 CS/LD High to SCK Positive Edge
q7
ns
SCK Frequency
50% Duty Cycle
q
50 MHz
Note 1: Absolute maximum ratings are those values beyond which the life
of a device may be impaired.
Note 2: Linearity and monotonicity are defined from code kL to code
2N – 1, where N is the resolution and kL is given by kL = 0.016(2N/VREF),
rounded to the nearest whole code. For VREF = 4.096V and N = 16, kL =
256 and linearity is defined from code 256 to code 65,535.
Note 3: Digital inputs at 0V or VCC.
Note 4: DC crosstalk is measured with VCC = 5V and VREF = 4.096V, with
the measured DAC at midscale, unless otherwise noted.
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Note 5: RL = 2kto GND or VCC at the output of the DAC not being tested.
Note 6: Guaranteed by design and not production tested.
Note 7: Inferred from measurement at code 256 (LTC2602), code 64
(LTC2612) or code 16 (LTC2622), and at fullscale.
Note 8: VCC = 5V, VREF = 4.096V. DAC is stepped 1/4 scale to 3/4 scale
and 3/4 scate to 1/4 scale. Load is 2k in parallel with 200pF to GND.
Note 9: VCC = 5V, VREF = 4.096V. DAC is stepped ±LBS between half scale
and half scale –1. Load is 2k in parallel with 200pF to GND.
TYPICAL PERFOR A CE CHARACTERISTICS
(LTC2602)
Integral Nonlinearity (INL)
32
VCC = 5V
24 VREF = 4.096V
16
8
0
–8
–16
–24
–32
0
16384
32768
CODE
49152 65535
2602 G20
Differential Nonlinearity (DNL)
1.0
VCC = 5V
0.8 VREF = 4.096V
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384
32768
CODE
49152
65535
2602 G21
INL vs Temperature
32
24
VCC = 5V
VREF = 4.096V
16
8 INL (POS)
0
–8
INL (NEG)
–16
–24
–32
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
2602 G22
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LTC2602/LTC2612/LTC2622
TYPICAL PERFOR A CE CHARACTERISTICS
(LTC2602)
DNL vs Temperature
1.0
0.8 VCC = 5V
0.6 VREF = 4.096V
0.4
DNL (POS)
0.2
0
–0.2
DNL (NEG)
–0.4
–0.6
–0.8
–1.0
–50 –30 –10 10 30 50
TEMPERATURE (°C)
70 90
2602 G23
INL vs VREF
32
24 VCC = 5.5V
16
8 INL (POS)
0
–8 INL (NEG)
–16
–24
–32
0123
VREF (V)
45
2602 G24
DNL vs VREF
1.5
VCC = 5.5V
1.0
0.5
DNL (POS)
0
DNL (NEG)
–0.5
–1.0
–1.5
012345
VREF (V)
2602 G25
Settling to ±1LSB
Settling of Full-Scale Step
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VOUT
100µV/DIV
CS/LD
2V/DIV
9.7µs
VOUT
100µV/DIV
CS/LD
2V/DIV
12.3µs
2µs/DIV
VCC = 5V, VREF = 4.096V
1/4-SCALE TO 3/4-SCALE STEP
RL = 2k, CL = 200pF
AVERAGE OF 2048 EVENTS
2602 G26
5µs/DIV
VCC = 5V, VREF = 4.096V
CODE 512 TO 65535 STEP
AVERAGE OF 2048 EVENTS
SETTLING TO ±1LSB
2602 G27
(LTC2612)
Integral Nonlinearity (INL)
8
VCC = 5V
6 VREF = 4.096V
4
2
0
–2
–4
–6
–8
0
4096
8192
CODE
12288 16383
2602 G28
Differential Nonlinearity (DNL)
Settling to ±1LSB
1.0
VCC = 5V
0.8 VREF = 4.096V
0.6
0.4 VOUT
0.2 100µV/DIV
0
–0.2 CS/LD
2V/DIV
8.9µs
–0.4
–0.6
–0.8
–1.0
0
4096
8192
CODE
12288 16383
2µs/DIV
VCC = 5V, VREF = 4.096V
1/4-SCALE TO 3/4-SCALE STEP
RL = 2k, CL = 200pF
AVERAGE OF 2048 EVENTS
2602 G29
2602 G30
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