LTC1864 Datasheet PDF - Linear Technology
| Part Number | LTC1864 | |
| Description | (LTC1864 / LTC1865) 16-Bit 1/2-Channel 250ksps ADCs | |
| Manufacturers | Linear Technology | |
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( DataSheet : www.DataSheet4U.com )
FEATURES
s 16-Bit 250ksps ADCs in MSOP Package
s Single 5V Supply
s Low Supply Current: 850µA (Typ)
s Auto Shutdown Reduces Supply Current
to 2µA at 1ksps
s True Differential Inputs
s 1-Channel (LTC1864) or 2-Channel (LTC1865)
Versions
s SPI/MICROWIRETM Compatible Serial I/O
s 16-Bit Upgrade to 12-Bit LTC1286/LTC1298
s Pin Compatible with 12-Bit LTC1860/LTC1861
U
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
LTC1864/LTC1865
µPower, 16-Bit, 250ksps
1- and 2-Channel ADCs in MSOP
DESCRIPTIO
The LTC®1864/LTC1865 are 16-bit A/D converters that are
offered in MSOP and SO-8 packages and operate on a
single 5V supply. At 250ksps, the supply current is only
850µA. The supply current drops at lower speeds because
the LTC1864/LTC1865 automatically power down
between conversions. These 16-bit switched capacitor
successive approximation ADCs include sample-and-holds.
The LTC1864 has a differential analog input with an
adjustable reference pin. The LTC1865 offers a software-
selectable 2-channel MUX and an adjustable reference pin
on the MSOP version.
The 3-wire, serial I/O, small 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 5V Supply, 250ksps, 16-Bit Sampling ADC
1µF
5V
ANALOG INPUT
0V TO 5V
LTC1864
1
VREF
2 IN+
8
VCC
7
SCK
3 IN–
6
SDO
4
GND
5
CONV
1864 TA01
SERIAL DATA LINK TO
ASIC, PLD, MPU, DSP
OR SHIFT REGISTERS
www.DataSheet4U.com
Supply Current vs Sampling Frequency
1000
100
10
1
0.1
0.01
0.01
0.1 1 10 100
SAMPLING FREQUENCY (kHz)
1000
186w4 TwA02w.DataSheet4U.com
18645f
1
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TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Sampling
Frequency
1000
100
VCC = 5V
TA = 25°C
CONV LOW = 800ns
Supply Current vs Temperature
1000
800
10 600
1
0.1
0.01
0.01
0.1 1.0 10 100
SAMPLING FREQUENCY (kHz)
1000
1864/65 G01
Reference Current vs
Sampling Rate
60
VCC = 5V
TA = 25°C
50 VREF = 5V
CONV LOW = 800ns
40
30
20
10
0
0 50 100 150 200 250
SAMPLE RATE (kHz)
1864/65 G04
400
200
0
–50 –25
VCC = 5V
VREF = 5V
fSAMPLE = 250kHz
CONV HIGH = 3.2µS
0 25 50 75 100 125
TEMPERATURE (°C)
1864/65 G02
Reference Current vs
Temperature
55
VCC = 5V
54 VREF = 5V
53 fS = 250kHz
52
51
50
49
48
47
46
45
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1864/65 G05
Typical INL Curve
4
VCC = 5V
TA = 25°C
VREF = 5V
2
Typical DNL Curve
2
VCC = 5V
TA = 25°C
VREF = 5V
1
LTC1864/LTC1865
Sleep Current vs Temperature
1000
CONV = VCC = 5V
900
800
700
600
500
400
300
200
100
0
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
1864/65 G03
Reference Current vs
Reference Voltage
60
VCC = 5V
TA = 25°C
50 fS = 250kHz
40
30
20
10
0
01
23
VREF (V)
45
1864/65 G06
Analog Input Leakage Current vs
Temperature
100
VCC = 5V
VREF = 5V
CONV = 0V
75
0 0 50
–2 –1 25
–4
0
16384
32768
CODE
49152 65536
1864/65 G07
–2
0
16384
32768
CODE
49152 65536
1864/65 G08
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1864/65 G09
18645f
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LTC1864 electronic component. |
| Information | Total 20 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ LTC1864.PDF Datasheet ] | |
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