LTC1861L 반도체 회로 부품 판매점
(LTC1860L / LTC1861L) 12-Bit 1/2-Channel 150ksps ADCs
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 Linear Technology |
( 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
18601Lf
1
LTC1860L/LTC1861L
ABSOLUTE AXI U RATI GS (Notes 1, 2)
Supply Voltage (VCC) ................................................. 7V
Ground Voltage Difference
AGND, DGND LTC1861L MSOP Package ......... ±0.3V
Analog Input .................... (GND – 0.3V) to (VCC + 0.3V)
Digital Input ..................................... (GND – 0.3V) to 7V
Digital Output .................. (GND – 0.3V) to (VCC + 0.3V)
UW U
PACKAGE/ORDER I FOR ATIO
Power Dissipation .............................................. 400mW
Operating Temperature Range
LTC1860LC/LTC1861LC ......................... 0°C to 70°C
LTC1860LI/LTC1861LI ...................... – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
TOP VIEW
VIRNE+F
1
2
IN¯ 3
GND 4
8 VCC
7 SCK
6 SDO
5 CONV
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 210°C/W
ORDER PART
NUMBER
LTC1860LCMS8
LTC1860LIMS8
MS8 PART MARKING
LTD2
LTD3
CONV 1
CH0 2
CH1 3
AGND 4
DGND 5
TOP VIEW
10 VREF
9 VCC
8 SCK
7 SDO
6 SDI
MS PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 210°C/W
TOP VIEW
VREF 1
IN+ 2
IN– 3
GND 4
8 VCC
7 SCK
6 SDO
5 CONV
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 175°C/W
ORDER PART
NUMBER
LTC1860LCS8
LTC1860LIS8
S8 PART MARKING
1860L
1860LI
TOP VIEW
CONV 1
CH0 2
CH1 3
GND 4
8 VCC
7 SCK
6 SDO
5 SDI
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 175°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
LTC1861LCMS
LTC1861LIMS
MS PART MARKING
LTD4
LTD5
ORDER PART
NUMBER
LTC1861LCS8
LTC1861LIS8
S8 PART MARKING
1861L
1861LI
CO VERTER A D ULTIPLEXER CHARACTERISTICS
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VCC = 2.7V, VREF = 2.5V, fSCK = fSCK(MAX) as defined in Recommended Operating Conditions, unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
Resolution
q 12
Bits
No Missing Codes Resolution
q 12
Bits
INL
(Note 3)
q ±1 LSB
Transition Noise
Gain Error
0.13 LSBRMS
q ±20 mV
Offset Error
Input Differential Voltage Range
Absolute Input Range
VREF Input Range
Analog Input Leakage Current
VIN = IN+ – IN–
IN+ Input
IN– Input
LTC1860L S0-8 and MSOP, LTC1861L MSOP
(Note 4)
q
q0
– 0.05
– 0.05
1
q
±2 ±5
VREF
VCC + 0.05
VCC/2
VCC
±1
mV
V
V
V
V
µA
CIN Input Capacitance
In Sample Mode
During Conversion
12 pF
5 pF
18601Lf
2
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LTC1861L data
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