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PDF LTC2636 Data sheet ( Hoja de datos )
| Número de pieza | LTC2636 | |
| Descripción | Octal 12-/10-/8-Bit SPI VOUT DACs | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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LTC2636
Octal 12-/10-/8-Bit SPI VOUT
DACs with10ppm/°C Reference
FEATURES
wwwn.daItanstheegerta4ute.cdomPrecision Reference
2.5V Full-Scale 10ppm/°C (LTC2636-L)
4.096V Full-Scale 10ppm/°C (LTC2636-H)
n Maximum INL Error: 2.5LSB (LTC2636-12)
n Low Noise: 0.75mVP-P 0.1Hz to 200KHz
n Guaranteed Monotonic Over –40°C to 125°C
Temperature Range
n Selectable Internal or External Reference
n 2.7V to 5.5V Supply Range (LTC2636-L)
n Ultralow Crosstalk Between DACs (<2.4nV•s)
n Low Power: 0.9mA at 3V (LTC2636-L)
n Power-On-Reset to Zero-Scale/Mid-Scale
n Double-Buffered Data Latches
n Tiny 14-Lead 4mm × 3mm DFN and 16-Lead MSOP
Packages
APPLICATIONS
n Mobile Communications
n Process Control and Industrial Automation
n Automatic Test Equipment
n Portable Equipment
n Automotive
n Optical Networking
DESCRIPTION
The LTC®2636 is a family of octal 12-, 10-, and 8-bit
voltage-output DACs with an integrated, high-accuracy,
low-drift 10ppm/°C reference in 14-lead DFN and 16-lead
MSOP packages. It has a rail-to-rail output buffer and is
guaranteed monotonic. The LTC2636-L has a full-scale
output of 2.5V, and operates from a single 2.7V to 5.5V
supply. The LTC2636-H has a full-scale output of 4.096V,
and operates from a 4.5V to 5.5V supply. Each DAC can
also operate with an external reference, which sets the DAC
full-scale output to the external reference voltage.
These DACs communicate via an SPI/MICROWIRE™-com-
patible 3-wire serial interface which operates at clock rates
up to 50MHz. Hardware clear (CLR) and asynchronous
DAC update (LDAC) pins are available in the MSOP pack-
age. The LTC2636 incorporates a power-on reset circuit.
Options are available for reset to zero-scale or reset to
mid-scale in internal reference mode, or reset to mid-scale
in external reference mode after power-up.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
SPI/MICROWIRE is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents including 5396245, 5859606,
6891433, 6937178, 7414561.
BLOCK DIAGRAM
INTERNAL REFERENCE
GND
VOUTA
VREF
VOUTB
VREF
VOUTC
VREF
VOUTD
CS/LD
SCK
(LDAC)
DAC A
DAC B
DAC C
DAC D
CONTROL LOGIC
DECODE
32-BIT SHIFT REGISTER
( ) MSOP PACKAGE ONLY
SWITCH
VREF
DAC H
DAC G
DAC F
DAC E
REF
VCC
VOUTH
VREF
VOUTG
VREF
VOUTF
VREF
VOUTE
SDI
POWER-ON RESET
(CLR)
2636 BD
12-Bit Integral Nonlinearity
(LTC2636-LZ12)
2
VCC = 3V
INTERNAL REF.
1
0
–1
–2
0
1024
2048
CODE
3072
4095
2636 TA01
2636f
1
1 page  
LTC2636
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 2.7V to 5.5V, VOUT unloaded unless otherwise specified.
LTC2636-LMI12/-LMI10/-LMI8/-LMX12/-LMX10/-LMX8/-LZ12/-LZ10/-LZ8 (VFS = 2.5V)
wwwS.dYaMtaBsOhLeet4PuA.RcAoMmETER
CONDITIONS
LTC2636-8
LTC2636-10
LTC2636-12
MIN TYP MAX MIN TYP MAX MIN TYP MAX
UNITS
DC Performance
Resolution
l8
10 12
Bits
DNL
INL
ZSE
VOS
VOSTC
Monotonicity
VCC = 3V, Internal Reference (Note 4) l 8
10 12
Differential Nonlinearity VCC = 3V, Internal Reference (Note 4) l ±0.5 ±0.5 ±1
Integral Nonlinearity VCC = 3V, Internal Reference (Note 4) l
±0.05 ±0.5
±0.2 ±1
±1 ±2.5
Zero-Scale Error
VCC = 3V, Internal Reference, Code = 0 l
0.5 5
0.5 5
0.5 5
Offset Error
VCC = 3V, Internal Reference (Note 5) l
±0.5 ±5
±0.5 ±5
±0.5 ±5
VOS Temperature
Coefficient
VCC=3V, Internal Reference
±10 ±10 ±10
Bits
LSB
LSB
mV
mV
μV/°C
GE Gain Error
GETC Gain Temperature
Coefficient
VCC = 3V, Internal Reference
VCC = 3V, Internal Reference (Note 10)
C-Grade
I-Grade
H-Grade
l
±0.2 ±0.8
10
10
10
±0.2 ±0.8
10
10
10
±0.2 ±0.8 %FSR
10 ppm/°C
10 ppm/°C
10 ppm/°C
ROUT
Load Regulation
DC Output Impedance
Internal Reference, Mid-Scale,
VCC = 3V±10%,
–5mA ≤ IOUT ≤ 5mA
VCC = 5V±10%, (Note 11)
–10mA ≤ IOUT ≤ 10mA
Internal Reference, Mid-Scale,
VCC = 3V±10%,
–5mA ≤ IOUT ≤ 5mA
VCC = 5V±10%, (Note 11)
–10mA ≤ IOUT ≤ 10mA
l 0.009 0.016 0.035 0.064 0.14 0.256 LSB/mA
l 0.009 0.016 0.035 0.064 0.14 0.256 LSB/mA
l
0.09 0.156
0.09 0.156
0.09 0.156
Ω
l
0.09 0.156
0.09 0.156
0.09 0.156
Ω
SYMBOL PARAMETER
VOUT DAC Output Span
PSR Power Supply Rejection
ISC Short Circuit Output Current (Note 6)
Sinking
Sourcing
Power Supply
VCC Positive Supply Voltage
ICC Supply Current (Note 7)
ISD Supply Current in Power-Down Mode
(Note 7)
CONDITIONS
External Reference
Internal Reference
VCC = 3V±10% or 5V±10%
VFS = VCC = 5.5V
Zero-Scale; VOUT shorted to VCC
Full-Scale; VOUT shorted to GND
For Specified Performance
VCC = 3V, VREF =2.5V, External Reference
VCC = 3V, Internal Reference
VCC = 5V, VREF =2.5V, External Reference
VCC = 5V, Internal Reference
VCC = 5V, C-Grade, I-Grade
VCC = 5V, H-Grade
MIN TYP MAX
0 to VREF
0 to 2.5
–80
l 27 48
l –28 –48
UNITS
V
V
dB
mA
mA
l 2.7
5.5
l 0.8 1.1
l 0.9 1.3
l 0.9 1.3
l 1 1.5
l 0.5 1.8
l 0.5 5
V
mA
mA
mA
mA
μA
μA
2636f
5
5 Page 
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, unless otherwise noted. LTC2636-H12 (Internal Reference, VFS = 4.096V)
www.datasheet4u.com
Integral Nonlinearity (INL)
1.0
VCC = 5V
0.5
Differential Nonlinearity (DNL)
1.0
VCC = 5V
0.5
LTC2636
00
–0.5 –0.5
–1.0
0
1024
2048
CODE
3072
4095
2636 G08
–1.0
0
INL vs Temperature
1.0
VCC = 5V
0.5 INL (POS)
0
INL (NEG)
–0.5
DNL vs Temperature
1.0
VCC = 5V
0.5
DNL (POS)
0
DNL (NEG)
–0.5
1024
2048
CODE
3072
4095
2636 G09
Reference Output Voltage
vs Temperature
2.068
VCC = 5V
2.058
2.048
2.038
–1.0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
2636 G10
–1.0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
2636 G11
2.028
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
2636 G12
Settling to ±1LSB Rising
CS/LD
5V/DIV
VOUT
1LSB/DIV
4.0μs
1/4 SCALE TO
3/4 SCALE STEP
VCC = 5V, VFS = 4.095V
RL = 2k, CL = 100pF
AVERAGE OF 256 EVENTS
2μs/DIV
2636 G13
Settling to ±1LSB Falling
VOUT
1LSB/DIV
1/4 SCALE TO
3/4 SCALE STEP
VCC = 5V, VFS = 4.095V
RL = 2k, CL = 100pF
AVERAGE OF 256 EVENTS
4.8μs
CS/LD
5V/DIV
2μs/DIV
2636 G14
2636f
11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet LTC2636.PDF ] | |
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