|
|
PDF LTC2657 Data sheet ( Hoja de datos )
| Número de pieza | LTC2657 | |
| Descripción | Octal I2C 12-Bit Rail-to-Rail DACs | |
| Fabricantes | Linear Technology Corporation | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LTC2657 (archivo pdf) en la parte inferior de esta página. Total 24 Páginas | ||
|
No Preview Available !
FEATURES
n Integrated Reference 10ppm/°C Max
n Maximum INL Error: ±4LSB
n Guaranteed Monotonic Over Temperature
n Selectable Internal or External Reference
n 2.7V to 5.5V Supply Range (LTC2657-L)
n Integrated Reference Buffers
n Ultralow Crosstalk between DACs(0.8nV•s)
n Power-On-Reset to Zero-Scale/Mid-Scale
n 400kHz I2C Interface
n Tiny 20-Lead 4mm × 5mm QFN and 20-Lead
Thermally enhanced TSSOP packages
APPLICATIONS
n Mobile Communications
n Process Control and Industrial Automation
n Instrumentation
n Automatic Test Equipment
n Automotive
LTC2657
Octal I2C 16-/12-Bit
Rail-to-Rail DACs with
10ppm/°C Max Reference
DESCRIPTION
The LTC®2657 is a family of octal I2C 16-/12-Bit Rail-to-
Rail DACs with Integrated 10ppm/°C Max Reference. The
DACs have built-in high performance, rail-to-rail, output
buffers and are guaranteed monotonic. The LTC2657-L has
a full-scale output of 2.5V with the integrated reference and
operates from a single 2.7V to 5.5V supply. The LTC2657-H
has a full-scale output of 4.096V with the integrated reference
and operates from a 4.5V to 5.5V supply. Each DAC can also
operate with an external reference, which sets the full-scale
output to 2 times the external reference voltage.
The parts use a 2-wire I2C compatible serial interface. The
LTC2657 operates in both the standard mode (maximum
clock rate of 100kHz) and the fast mode (maximum clock
rate of 400kHz). The LTC2657 incorporates a power-on reset
circuit that is controlled by the PORSEL pin. If PORSEL is tied
to GND the DACs reset to zero-scale at power-up. If PORSEL
is tied to VCC, the DACs reset to mid-scale at power-up.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents including
5396245, 6891433 and patent pending.
BLOCK DIAGRAM
www.DataSheet4U.com
REFCOMP
GND
REF
INTERNAL REFERENCE
REFLO
VOUTA
DAC A
DAC H
REFIN/OUT
VCC
VOUTH
VOUTB
DAC B
DAC G
VOUTG
VOUTC
DAC C
DAC F
VOUTF
VOUTD
CA0
CA1
CA2
LDAC
DAC D
32-BIT SHIFT REGISTER
2-WIRE INTERFACE
DAC E
POWER-ON RESET
VOUTE
PORSEL
SDA
SCL
2657 BD
INL vs Code (LTC2657-16)
4
3
2
1
0
–1
–2
–3
–4
128
16384
DAC A
DAC B
DAC C
DAC D
DAC E
DAC F
DAC G
DAC H
32768
CODE
49152 65535
2657 TA01
2657f
1
1 page  
LTC2657
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.
LTC2657B-L16/LTC2657-L12 (Internal Reference = 1.25V)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VOUT DAC Output Span
PSR Power Supply Rejection
ROUT DC Output Impedance
DC Crosstalk (Note 5)
Internal Reference
External Reference = VEXTREF
VCC ±10%
VCC = 5V ±10%, Internal Reference, Mid-Scale,
–15mA ≤ IOUT ≤ 15mA
VCC = 3V ±10%, Internal Reference, Mid-Scale,
–7.5mA ≤ IOUT ≤ 7.5mA
Due to Full-Scale Output Change
Due to Load Current Change
Due to Powering Down (per Channel)
l
l
0 to 2.5
0 to 2 • VEXTREF
–80
0.04
0.15
V
V
dB
Ω
0.04 0.15 Ω
±1.5 μV
±2 μV/mA
±1 μV
ISC Short-Circuit Output Current (Note 6) VCC = 5.5V, VEXTREF = 2.8V
Code: Zero-Scale, Forcing Output to VCC
Code: Full-Scale, Forcing Output to GND
l 20
l 20
65 mA
65 mA
Reference
Reference Output Voltage
VCC = 2.7V, VEXTREF = 1.4V
Code: Zero-Scale, Forcing Output to VCC
Code: Full-Scale, Forcing Output to GND
l 10
l 10
1.248
1.25
40
40
1.252
mA
mA
V
Reference Temperature Coefficient
(Note 7) C-Grade Only
±2 ±10 ppm/°C
Reference Line Regulation
Reference Short-Circuit Current
REFCOMP Pin Short-Circuit Current
Reference Load Regulation
VCC ±10%
VCC = 5.5V, Forcing REFIN/OUT to GND
VCC = 5.5V, Forcing REFCOMP to GND
VCC = 3V ±10% or 5V ±10%, IOUT = 100μA
Sourcing
Reference Output Voltage Noise Density CREFCOMP = CREFIN/OUT = 0.1μF at f = 1kHz
Reference Input Range
External Reference Mode (Note 14)
www.DataSheeRt4eUfe.rceonmce Input Current
Reference Input Capacitance
(Note 9)
l
l
l 0.5
l
–80
40
30
0.001
40
dB
5 mA
200 μA
mV/mA
VCC/2
1
nV/√Hz
V
μA
pF
Power Supply
VCC Positive Supply Voltage
For Specified Performance
ICC Supply Current (Note 8)
VCC = 5V, Internal Reference On
VCC = 5V, Internal Reference Off
VCC = 3V, Internal Reference On
VCC = 3V, Internal Reference Off
ISD
Supply Current in Shutdown Mode
VCC = 5V
(Note 8)
l 2.7
5.5 V
l 3.1 4.25 mA
l 2.7 3.7 mA
l 3 3.8 mA
l 2.6 3.2 mA
l 3 μA
Digital I/O
VIL Low Level Input Voltage
(SDA and SCL)
l
0.3VCC
V
VIH High Level Input Voltage
(SDA and SCL)
VIL(LDAC) Low Level Input Voltage (LDAC)
VIH(LDAC) High Level Input Voltage (LDAC)
VCC = 4.5V to 5.5V
VCC = 2.7V to 4.5V
VCC = 3.6V to 5.5V
VCC = 2.7V to 3.6V
l 0.7VCC
l
l
l 2.4
l2
V
0.8 V
0.6 V
V
V
2657f
5
5 Page 
LTC2657
TYPICAL PERFORMANCE CHARACTERISTICS LTC2657-H16, TA = 25°C unless otherwise noted.
Integral Nonlinearity (INL)
4
VCC = 5V
3
2
1
0
–1
–2
–3
–4
128
16384
32768
CODE
49152 65535
2657 G10
Differential Nonlinearity (DNL)
1
VCC = 5V
0.5
0
–0.5
–1
128
16384
32768
CODE
49152 65535
2657 G011
INL vs Temperature
4
VCC = 5V
3
2
INL (POS)
1
0
–1 INL (NEG)
–2
–3
–4
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
3586 G35
DNL vs Temperature
1
VCC = 5V
0.5
DNL (POS)
0
DNL (NEG)
–0.5
www.DataSheet4U.com
–1
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
2657 G13
REFIN/OUT Output Voltage
vs Temperature
2.054
VCC = 5V
2.052
2.050
2.048
2.046
2.044
2.042
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
2657 G14
Settling to ±1LSB Rising
SCL
5V/DIV
9TH CLOCK OF
3RD DATA BYTE
9.7μs
VOUT
250μV/DIV
1/4 SCALE TO 3/4
SCALE STEP
VCC = 5V, VFS = 4.096V
RL = 2k, CL = 200pF
AVERAGE OF 2048 EVENTS
2μs/DIV
2657 G16
Settling to ±1LSB Falling
9.2μs
VOUT
250μV/DIV
9TH CLOCK OF
3RD DATA BYTE
SCL
5V/DIV
3/4 SCALE TO 1/4 SCALE
STEP
VCC = 5V, VFS = 4.096V
RL = 2k, CL = 200pF
AVERAGE OF 2048
EVENTS
2μs/DIV
2657 G17
2657f
11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet LTC2657.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LTC2654 | Quad 16-/12-Bit Rail-to-Rail DACs |  Linear Technology |
| LTC2655 | 16-/12-Bit Rail-to-Rail DACs | Linear Technology |
| LTC2656 | Octal 16-/12-Bit Rail-to-Rail DACs | Linear Technology Corporation |
| LTC2657 | Octal I2C 12-Bit Rail-to-Rail DACs | Linear Technology Corporation |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |