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PDF LTC1605-1 Data sheet ( Hoja de datos )

Número de pieza LTC1605-1
Descripción Single Supply 16-Bit/ 100ksps/ Sampling ADCs
Fabricantes Linear Technology　
Logotipo Linear Technology Logotipo



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No Preview Available ! LTC1605-1 Hoja de datos, Descripción, Manual

LTC1605-1/LTC1605-2
Single Supply 16-Bit, 100ksps,
Sampling ADCs
FEATURES
s Sample Rate: 100ksps
s Complete 16-Bit Solution on a Single 5V Supply
s Unipolar Input Range: 0V to 4V (LTC1605-1)
s Bipolar Input Range: ±4V (LTC1605-2)
s Power Dissipation: 55mW Typ
s Signal-to-Noise Ratio: 86dB Typ
s Operates with Internal or External Reference
s Internal Synchronized Clock
s 28-Pin 0.3" PDIP and SSOP Packages
U
APPLICATIO S
s Industrial Process Control
s Multiplexed Data Acquisition Systems
s High Speed Data Acquisition for PCs
s Digital Signal Processing
DESCRIPTIO
The LTC®1605-1/LTC1605-2 are 100ksps, sampling
16-bit A/D converters that draw only 55mW (typical) from
a single 5V supply. These easy-to-use devices include a
sample-and-hold, precision reference, switched capacitor
successive approximation A/D and trimmed internal clock.
The LTC1605-1’s input range is 0V to 4V while the
LTC1605-2’s input range is ±4V. An external reference
can be used if greater accuracy over temperature is
needed.
The ADC has a microprocessor compatible, 16-bit or two
byte parallel output port. A convert start input and a data
ready signal (BUSY) ease connections to FIFOs, DSPs and
microprocessors.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
LTC1605-1 Low Power, 100kHz, 16-Bit Sampling ADC on 5V Supply
0V TO 4V 200Ω
INPUT
33.2k
2.5V
2.2µF
2.5V
2.2µF
1 VIN
4 CAP
3 REF
5V
28 27
VDIG VANA
4k
20k 10k
10µF
0.1µF
16-BIT
SAMPLING ADC
6 TO 13
15 TO 22
D15 TO D0
16-BIT
OR 2 BYTE
PARALLEL
BUS
BUFFER
4k 2.5V
REFERENCE
CONTROL
LOGIC AND
TIMING
AGND1 AGND2 DGND
2 5 14
BUSY 26
CS 25
R/C 24
BYTE 23
DIGITAL
CONTROL
SIGNALS
1605-1/2 TA01
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
0
Typical INL Curve
16384
32768
CODE
49152 65535
1605-1/2 TA02/G04
1

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LTC1605-1 pdf
TYPICAL PERFOR A CE CHARACTERISTICS
LTC1605-1/LTC1605-2
Supply Current vs Supply Voltage
12.5
fSAMPLE = 100kHz
12.0
11.5
11.0
10.5
10.0
9.5
4.50
4.75 5.00 5.25 5.50
SUPPLY VOLTAGE (V)
1605-1/2 G01
Supply Current vs Temperature
12.0
fSAMPLE = 100kHz
11.5
11.0
10.5
10.0
–50 –25
0
25 50
TEMPERATURE (°C)
75 100
1605-1/2 G02
Change in CAP Voltage vs
Load Current
0.04
0.02
0
–0.02
–0.04
LTC1605-2
–0.06
–0.08
LTC1605-1
–0.10
–80 –70 –60 –50 –40 –30 –20 –10 0 10
LOAD CURRENT (mA)
1605-1/2 G03
Typical INL Curve
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
0
16384
32768
CODE
49152 65535
1605-1/2 TA02/G04
LTC1605-2 Nonaveraged
4096-Point FFT Plot
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
fSAMPLE = 100kHz
fIN = 1kHz
SINAD = 87dB
THD = 101.1dB
SNR = 87.2dB
5 10 15 20 25 30 35 40 45 50
FREQUENCY (kHz)
1605-1/2 G07/F11
Typical DNL Curve
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
0
16384
32768
CODE
49152 65535
1605-1/2 G05
SINAD vs Input Frequency
(LTC1605-2)
90
88
86
84
82
80
1
10
INPUT FREQUENCY (kHz)
100
1605-1/2 G08
Power Supply Feedthrough
vs Ripple Frequency
–20
–30
–40 LTC1605-2
–50
–60
LTC1605-1
–70
–80
100
1k 10k 100k
RIPPLE FREQUENCY (Hz)
1M
LTXXXX GXX
Total Harmonic Distortion vs
Input Frequency (LTC1605-2)
– 70
–80
–90
–100
–110
1
10
INPUT FREQUENCY (kHz)
100
1605-1/2 G09
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LTC1605-1 arduino
APPLICATIONS INFORMATION
LTC1605-1/LTC1605-2
t10
R/C
CS
BUSY
MODE
ACQUIRE
DATA BUS
t10
t1
t10 t10
t1
t3
t4
t6
CONVERT
tCONV
ACQUIRE
HI-Z
t12
Figure 9. Using CS to Control Conversion and Read Timing
DATA
VALID
t7
HI-Z
1605-1/2 F09
t10
R/C
t10
CS
BYTE
PINS 6 TO 13
PINS 15 TO 22
HI-Z
t12
HI-Z
HIGH BYTE
t12
LOW BYTE
LOW BYTE
t7
HIGH BYTE
HI-Z
HI-Z
Figure 10. Using CS and BYTE to Control Data Bus Read Timing
1605-1/2 F10
11

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