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PDF LTC1861L Data sheet ( Hoja de datos )
| Número de pieza | LTC1861L | |
| Descripción | (LTC1860L / LTC1861L) 12-Bit 1/2-Channel 150ksps ADCs | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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( DataSheet : www.DataSheet4U.com )
LTC1860L/LTC1861L
µPower, 3V, 12-Bit, 150ksps
1- and 2-Channel ADCs in MSOP
FEATURES
s 12-Bit 150ksps ADCs in MSOP Package
s Single 3V Supply
s Low Supply Current: 450µA (Typ)
s Auto Shutdown Reduces Supply Current
to 10µA at 1ksps
s True Differential Inputs
s 1-Channel (LTC1860L) or 2-Channel (LTC1861L)
Versions
s SPI/MICROWIRETM Compatible Serial I/O
s High Speed Upgrade to LTC1285/LTC1288
s Pin Compatible with 16-Bit LTC1864L/LTC1865L
s No Minimum DataUTransfer Rate
APPLICATIO S
s High Speed Data Acquisition
s Portable or Compact Instrumentation
s Low Power Battery-Operated Instrumentation
s Isolated and/or Remote Data Acquisition
DESCRIPTIO
The LTC®1860L/LTC1861L are 12-bit A/D converters that
are offered in MSOP and SO-8 packages and operate on a
single 3V supply. At 150ksps, the supply current is only
450µA. The supply current drops at lower speeds because
the LTC1860L/LTC1861L automatically power down be-
tween conversions. These 12-bit switched capacitor suc-
cessive approximation ADCs include sample-and-holds.
The LTC1860L has a differential analog input with an
external reference pin. The LTC1861L offers a software-
selectable 2-channel MUX and an external reference pin on
the MSOP version.
The 3-wire, serial I/O, MSOP or SO-8 package and
extremely high sample rate-to-power ratio make these
ADCs ideal choices for compact, low power, high speed
systems.
These ADCs can be used in ratiometric applications or with
external references. The high impedance analog inputs
and the ability to operate with reduced spans down to 1V
full scale allow direct connection to signal sources in many
applications, eliminating the need for external gain stages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
TYPICAL APPLICATIO
Single 3V Supply, 150ksps, 12-Bit Sampling ADC
1µF
3V
ANALOG INPUT
0V TO 3V
LTC1860L
1
VREF
2 IN+
8
VCC
7
SCK
3 IN–
6
SDO
4
GND
CONV
5
1860L TA01
SERIAL DATA LINK TO
ASIC, PLD, MPU, DSP
OR SHIFT REGISTERS
www.DataSheet4U.com
Supply Current vs Sampling Frequency
1000
100
CONV LOW = 1.5µs
TA = 25°C
VCC = 2.7V
10
1
0.1
0.01
0.1 1 10 100 1000
SAMPLING FREQUENCY (kHz)
1860L/61LwTAw02 w.DataSheet4U.com
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1
1 page  
TYPICAL PERFOR A CE CHARACTERISTICS
Reference Current vs
Sampling Rate
10
CONV LOW = 1.5µs
9 TA = 25°C
8
VCC = 2.7V
VREF = 2.5V
7
6
5
4
3
2
1
0
0 25 50 75 100 125 150
SAMPLING FREQUENCY (kHz)
1860L/61L G04
Reference Current vs
Temperature
25
fS = 150kHz
VCC = 2.7V
20 VREF = 2.5V
15
10
5
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1860L/61L G05
Typical INL Curve
1.0
fS = 150kHz
TA = 25°C
VCC = 2.7V
0.5 VREF = 2.5V
Typical DNL Curve
1.0
fS = 150kHz
TA = 25°C
VCC = 2.7V
0.5 VREF = 2.5V
LTC1860L/LTC1861L
Reference Current vs
Reference Voltage
25
fS = 150kHz
TA = 25°C
20 VCC = 3.6V
15
10
5
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
REFERENCE VOLTAGE (V)
1860L/61L G06
Analog Input Leakage vs
Temperature
100
CONV = 0V
VCC = 2.7V
VREF = 2.5V
75
0 0 50
–0.5 –0.5
25
–1.0
0
512 1024 1536 2048 2560 3072 3584 4096
CODE
1860L/61L G07
Change in Offset vs
Reference Voltage
2
fS = 150kHz
TA = 25°C
VCC = 3.6V
1
0
–1
–2
0
123
REFERENCE VOLTAGE (V)
4
1860L/61L G10
–1.0
0
512 1024 1536 2048 2560 3072 3584 4096
CODE
1860L/61L G08
Change in Offset vs Temperature
1.0
0.8
fS = 150kHz
VCC = 2.7V
0.6 VREF = 2.5V
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
1860L/61L G11
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1860L/61L G09
Change in Gain Error vs
Reference Voltage
2
fS = 150kHz
TA = 25°C
VCC = 3.6V
1
0
–1
–2
0
123
REFERENCE VOLTAGE (V)
4
1860L/61L G12
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5
5 Page 
LTC1860L/LTC1861L
PACKAGE DESCRIPTIO
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660)
0.889 ± 0.127
(.035 ± .005)
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
8 7 65
0.52
(.206)
REF
5.23
(.206)
MIN
3.2 – 3.45
(.126 – .136)
0.254
(.010)
GAUGE PLANE
0.42 ± 0.04
(.0165 ± .0015)
TYP
0.65
(.0256)
BSC
RECOMMENDED SOLDER PAD LAYOUT
0.18
NOTE:
(.077)
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
DETAIL “A”
0° – 6° TYP
4.90 ± 0.15
(1.93 ± .006)
0.53 ± 0.015
(.021 ± .006)
DETAIL “A”
1 234
1.10
(.043)
MAX
SEATING
PLANE
0.22 – 0.38
(.009 – .015)
TYP 0.65
(.0256)
BSC
3.00 ± 0.102
(.118 ± .004)
NOTE 4
0.86
(.034)
REF
0.13 ± 0.076
(.005 ± .003)
MSOP (MS8) 0802
MS Package
10-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1661)
0.889 ± 0.127
(.035 ± .005)
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
10 9 8 7 6
0.497 ± 0.076
(.0196 ± .003)
REF
5.23
(.206)
MIN
3.2 – 3.45
(.126 – .136)
0.254
(.010)
0.305 ± 0.038
(.0120 ± .0015)
TYP
0.50
(.0197)
BSC
RECOMMENDED SOLDER PAD LAYOUT
GAUGE PLANE
0.18
NOTE:
(.007)
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
DETAIL “A”
0° – 6° TYP
0.53 ± 0.01
(.021 ± .006)
DETAIL “A”
4.90 ± 0.15
(1.93 ± .006)
3.00 ± 0.102
(.118 ± .004)
NOTE 4
12345
1.10
(.043)
MAX
0.86
(.034)
REF
SEATING
PLANE
0.17 – 0.27
(.007 – .011)
TYP
0.50
(.0197)
BSC
0.13 ± 0.076
(.005 ± .003)
MSOP (MS) 0802
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.050 BSC
.245
MIN
.045 ±.005
.010
(0.254
–
–
.020
0.508)
×
45°
.008 – .010
(0.203 – 0.254)
.160 ±.005
0°– 8° TYP
.053 – .069
(1.346 – 1.752)
.030 ±.005
TYP
RECOMMENDED SOLDER PAD LAYOUT
.016 – .050
(0.406 – 1.270)
NOTE:
1. DIMENSIONS
IN
INCHES
(MILLIMETERS)
.014 – .019
(0.355 – 0.483)
TYP
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
.004 – .010
(0.101 – 0.254)
.050
(1.270)
BSC
.228 – .244
(5.791 – 6.197)
.189 – .197
(4.801 – 5.004)
NOTE 3
8 765
1 2 34
.150 – .157
(3.810 – 3.988)
NOTE 3
SO8 0303
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Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LTC1861L.PDF ] | |
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