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PDF LTC2664 Data sheet ( Hoja de datos )
| Número de pieza | LTC2664 | |
| Descripción | SoftSpan DACs | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LTC2664 (archivo pdf) en la parte inferior de esta página. Total 26 Páginas | ||
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Features
nn Precision Reference 10ppm/°C Max
nn Independently Programmable Output Ranges:
0V to 5V, 0V to 10V, ±2.5V, ±5V, ±10V
nn Full 16-Bit/12-Bit Resolution at All Ranges
nn Maximum INL Error: ±4LSB at 16 Bits
nn A/B Toggle via Software or Dedicated Pin
nn Analog Multiplexer with Auxiliary Inputs
nn Guaranteed Monotonic Over Temperature
nn Internal or External Reference
nn Outputs Drive ±10mA Guaranteed
nn 1.8V to 5V SPI Serial interface
nn 32-Lead (5mm × 5mm) QFN Package
Applications
nn Optical Networking
nn Instrumentation
nn Data Acquisition
nn Automatic Test Equipment
nn Process Control and Industrial Automation
LTC2664
Quad 16-Bit/12-Bit ±10V
VOUT SoftSpan DACs with
10ppm/°C Max Reference
Description
The LTC®2664 is a family of four-channel, 16-/12-bit ±10V
digital-to-analog converters with integrated precision
references. They are guaranteed monotonic and have
built-in rail-to-rail output buffers. These SoftSpan™ DACs
offer five output ranges up to ±10V. The range of each
channel is independently programmable, or the part can
be hardware-configured for operation in a fixed range.
The integrated 2.5V reference is buffered separately to each
channel; an external reference can be used for additional
range options. The LTC2664 also includes A/B toggle
capability via a dedicated pin or software toggle command.
The SPI/Microwire-compatible 3-wire serial interface
operates on logic levels as low as 1.71V at clock rates
up to 50MHz.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners. Protected by U.S. Patents, including 6891433, 5859606, 5936245,
7671770.
Block Diagram
REFCOMP 26
OVRTMP 30
GND
11, 29
REFLO
10, 27
MUXIN0 2
VOUT0 3
VREF
DAC 0
INTERNAL REFERENCE
MUX MUX
VREF
DAC 3
25 REF
28 VCC
24 CLR
7 V+
8 V–
23 MUXIN3
22 VOUT3
VREF
VOUT1 4
MUXIN1 5
CS/LD 13
SCK 14
SDI 16
SDO 15
MUXOUT 9
DAC 1
VREF
MUX MUX
DAC 2
CONTROL LOGIC
DECODE
32-BIT SHIFT REGISTER
POWER-ON RESET
MONITOR MUX TOGGLE SELECT REGISTER
21 VOUT2
20 MUXIN2
12 LDAC
17 TGP
31 MSP0
32 MSP1
1 MSP2
18 IOVCC
2664 BD
Integral Nonlinearity (LTC2664-16)
4
±10V RANGE
3
2
1
0
–1
–2
–3
–4
0
16384
32768
CODE
49152 65535
2664 TA01b
For more information www.linear.com/LTC2664
2664f
1
1 page  
LTC2664
E lectrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise
unless otherwise specified.
specifications
are
at
TA
=
25°C.
VCC
=
5V,
IOVCC
=
5V,
V+
=
15V,
V
–
=
–15V,
VREF
=
2.5V,
VOUT
unloaded
SYMBOL PARAMETER
CONDITIONS
Reference Load Regulation
Reference Output Voltage Noise
Density
VCC = 5V ± 10%, IOUT = 100µA Sourcing
CREFCOMP = CREF = 0.1µF, at f = 10kHz
Reference Input Range
External Reference Mode (Note 8)
Reference Input Current
External Reference
Reference Input Capacitance (Note 9)
Power Supply
VCC Analog Supply Voltage
V+ Analog Positive Supply
V– Analog Negative Supply
V– Not Tied to GND
V– Tied to GND
IOVCC
I(VCC)
IS
Digital I/O Supply Voltage
Supply Current VCC
Supply Current V+/V–
VCC = 5V, Unipolar Ranges (Note 10)
VCC = 5V, Bipolar Ranges (Note 10)
Unipolar Ranges (Code = 0)
Bipolar Ranges (Note 11)
I(IOVCC)
Supply Current IOVCC (Note 12)
VCC Shutdown Supply Current
V+ Shutdown Supply Current
V– Shutdown Supply Current
Analog Mux
IOVCC = 5V
IOVCC = VCC = 5V, V+/ V – = ±15V
IOVCC = VCC = 5V, V+/ V – = ±15V
IOVCC = VCC = 5V, V+/ V – = ±15V
Analog Mux DC Output Impedance
Analog Mux Leakage Current
Analog Mux Disabled (High Impedance)
Analog Mux Output Voltage Range Analog Mux Selected to DAC Channel
Analog Mux Continuous Current
(Note 9)
Temperature Monitor
Initial Voltage
T = 25°C
Temperature Coefficient
AC Performance
tSET Settling Time (Notes 9, 13)
±0.024% (±1LSB at 12 Bits)
0V to 5V or ±2.5V Span, ±5V Step ±0.0015% (±1LSB at 16 Bits)
Settling Time (Notes 9, 13)
±0.024% (±1LSB at 12 Bits)
0V to 10V or ±5V Span, ±10V Step ±0.0015% (±1LSB at 16 Bits)
Settling Time (Notes 9, 13)
±10V Span, ±20V Step
±0.024% (±1LSB at 12 Bits)
±0.0015% (±1LSB at 16 Bits)
SR Voltage Output Slew Rate
Capacitive Load Driving
No Oscillation
Glitch Impulse (Note 14)
At Mid-Scale Transition, 0V to 5V Range
DAC-to-DAC Crosstalk (Note 15) Due to Full-Scale Output Change
en Output Voltage Noise
0V to 5V Output Span,
Internal Reference
Density at f = 1kHz
Density at f = 10kHz
0.1Hz to 10Hz, Internal Reference
0.1Hz to 200kHz, Internal Reference
MIN
l 0.5
l
l
l 4.5
l 4.5
l –15.75
l 1.71
l
l
l
l
l
l
l
l –60
l
l V–
l
For more information www.linear.com/LTC2664
TYP
140
32
0.001
40
MAX UNITS
mV/mA
nV/√Hz
VCC – 1.75
1
V
µA
pF
5.5
15.75
– 4.5
0
VCC + 0.3
1.6 2.1
2.7 3.2
1.3 1.8
2.3 2.7
0.02 1
1 10
35 70
–27
V
V
V
V
V
mA
mA
mA
mA
µA
µA
µA
µA
2.2
0.02 1
V+ – 1.4
±1
kΩ
µA
V
mA
1.4 V
–3.7 mV/°C
4.5
9
8
9.5
15.5
20
5
1000
7
3.5
90
80
1.7
55
µs
µs
µs
µs
µs
µs
V/µs
pF
nV • s
nV • s
nV/√Hz
nV/√Hz
µVRMS
µVRMS
2664f
5
5 Page 
LTC2664
Typical Performance Characteristics TA = 25°C, unless otherwise noted.
LTC2664-16/LTC2664-12
Output Voltage Noise Density
vs Frequency
500
Output 0.1Hz to 10Hz Voltage
Noise
Reference 0.1Hz to 10Hz
Voltage Noise
400
300
VOUT
10µV/DIV
VREF
10µV/DIV
200
100
0
10 100 1k 10k
FREQUENCY (Hz)
AVP = 5V, V+/V– = ±15V
0V TO 5V RANGE
CODE = MID-SCALE
INTERNAL REFERENCE
CREF = CREFCOMP = 0.1µF
100k 1M
2664 G28
1s/DIV
VCC = 5V; V+/V– = ±15V
0V TO 5V RANGE
CODE = MID–SCALE
INTERNAL REFERENCE
CREF = CREFCOMP = 0.1µF
2664 G29
1s/DIV
VCC = 5V; V+/V– = ±15V
VREF = 2.5V (INTERNAL REFERENCE)
CREF = CREFCOMP = 0.1µF
2664 G30
Mid-Scale Glitch Impulse
DAC-to-DAC Crosstalk
CS/LD
VOUT
10mV/DIV
VVC+/CV,–I:O±V1C5CV: 5V
0V TO 5V RANGE
INTERNAL REFERENCE
CREF, CREFCOMP: 0.1µF
7nV–s TYP
1µs/DIV
2664 G31
RISING MAJOR CARRY TRANSITION
FALLING TRANSITION IS SIMILAR OR BETTER
ALL CHANNELS ARE SIMILAR OR BETTER
CS/LD
VOUT
10mV/DIV
VVC+/CV,–I:O±V1C5CV: 5V
0V TO 10V RANGE
INTERNAL REFERENCE
CREF, CREFCOMP: 0.1µF
3nV–s TYP
1µs/DIV
2664 G32
10V TO 0V FALLING STEP: VOUT1
MEASURED CHANNEL: VOUT0
RISING STEP IS SIMILAR OR BETTER
ALL CHANNELS ARE SIMILAR OR BETTER
Large Signal Response
15
10 0V to 10V RANGE
5
0V to 5V RANGE
0
–5
±10V RANGE
–10
–15
10µs/DIV
2664 G33
Load Regulation
10
8
78µV/mA TYP
CODE: MID–SCALE
6 INTERNAL REF
4
2
0
–2
–4
–6
–8
–10
–30
0 to 5V RANGE
V+/V– = 5V/0V
±10V RANGE
V+/V– = ±15V
–20 –10 0 10 20 30
VOUT LOAD CURRENT (mA)
2664 G34
For more information www.linear.com/LTC2664
2664f
11
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet LTC2664.PDF ] | |
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