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PDF LTC1865L Data sheet ( Hoja de datos )
| Número de pieza | LTC1865L | |
| Descripción | 16-Bit 2-Channel 150ksps ADCs | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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( DataSheet : www.DataSheet4U.com )
FEATURES
s 16-Bit 150ksps ADC in MSOP Package
s Single 3V Supply
s Low Supply Current: 450µA (Typ)
s Auto Shutdown Reduces Supply Current
to 10µA at 1ksps
s SPI/MICROWIRETM Compatible Serial I/O
s 16-Bit Upgrade to 12-Bit LTC1288
s Pin Compatible with 12-Bit LTC1861L
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
, LTC and LT are registered trademarks of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
Final Electrical Specifications
LTC1865L
µPower, 3V, 16-Bit, 150ksps
2-Channel ADC in MSOP
DESCRIPTIO
November 2002
The LTC®1865L is a 16-bit A/D converter that is offered in
MSOP and SO-8 packages and operates on a single 3V
supply. At 150ksps, the supply current is only 450µA. The
supply current drops at lower speeds because the
LTC1865L automatically powers down to a typical supply
current of 1nA between conversions. This 16-bit switched
capacitor successive approximation ADC includes a
sample-and-hold. The LTC1865L offers a software-select-
able 2-channel MUX. An adjustable reference pin is pro-
vided on the MSOP version.
The 4-wire, serial I/O, MSOP or SO-8 package and
extremely high sample rate-to-power ratio make this ADC
an ideal choice for compact, low power, high speed
systems.
This ADC 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.
TYPICAL APPLICATIO
Single 3V Supply, 150ksps, 16-Bit Sampling ADC
1µF 3V
Supply Current vs Sampling Frequency
1000
100
VCC = 2.7V
TA = 25°C
CONV LOW = 2µs
ANALOG
INPUTS
0V TO 3V
CH0
CH1
VCC VREF
CONV
LTC1865L
SCK
SDO
SDI
AGND DGND
SERIAL DATA LINK TO
ASIC, PLD, MPU, DSP
OR SHIFT REGISTERS
1865L TA01
10
1
0.1
0.01
0.1 1 10 100
SAMPLING FREQUENCY (kHz)
1000
1865 TA02
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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.
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1865li
1
1 page  
TYPICAL PERFOR A CE CHARACTERISTICS
LTC1865L
Supply Current vs Sampling
Frequency
1000
VCC = 2.7V
TA = 25°C
CONV LOW = 2µs
100
Typical INL Curve
4
VCC = 2.7V
VREF = 2.5V
2
Typical DNL Curve
2
VCC = 2.7V
VREF = 2.5V
1
10 0 0
1 –2 –1
0.1
0.01
0.1 1 10 100
SAMPLING FREQUENCY (kHz)
1000
1865 TA02
–4
0
16384
32768
CODE
49152 65536
1865 G02
–2
0
16384
32768
CODE
49152 65536
1865 G03
4096 Point FFT Nonaveraged
0
–10 VCC = 3V
–20
VREF = 3V
fS = 125kHz
–30 fIN = 1kHz
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
5 10 15 20 25 30 35 40 45 50 55 60 65
INPUT FREQUENCY (kHz)
1865 G04
SINAD vs Input Frequency
100
VCC = 3V
90 VREF 3V
80 fS = 125kHz
70
60
50
40
30
20
10
0
1 10 100
fIN (kHz)
1865 G05
SNR vs Input Frequency
100
90
80
70
60
50
40
30
20 VCC = 3V
10 VREF 3V
fS = 125kHz
0
1 10 100
fIN (kHz)
1865 G06
THD vs Input Frequency
0
VCC = 3V
–10 VREF 3V
–20 fS = 125kHz
–30
– 40
– 50
– 60
–70
–80
–90
–100
1
10
fIN (kHz)
100
1865 G07
SFDR vs Input Frequency
100
VCC = 3V
90 VREF 3V
80 fS = 125kHz
70
60
50
40
30
20
10
0
1 10 100
fIN (kHz)
1865 G08
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5 Page 
PACKAGE DESCRIPTIO
LTC1865L
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.050 BSC
N
.245
MIN
12 3
.045 ±.005
.189 – .197
(4.801 – 5.004)
NOTE 3
8 765
.160 ±.005
N/2
.228 – .244
(5.791 – 6.197)
N
.150 – .157
(3.810 – 3.988)
NOTE 3
N/2
.030 ±.005
TYP RECOMMENDED SOLDER PAD LAYOUT
1 2 34
.010
(0.254
–
–
.020
0.508)
×
45°
.008 – .010
(0.203 – 0.254)
0°– 8° TYP
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
.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)
.050
(1.270)
BSC
SO8 0502
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11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LTC1865L.PDF ] | |
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