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Datasheet LTC2368-16 PDF ( 特性, スペック, ピン接続図 )

部品番号 LTC2368-16
部品説明 Pseudo-Differential Unipolar SAR ADC
メーカ Linear
ロゴ Linear ロゴ 
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Total 24 pages
		
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LTC2368-16 Datasheet, LTC2368-16 PDF,ピン配置, 機能
FEATURES
n 1Msps Throughput Rate
n ±0.75LSB INL (Max)
n Guaranteed 16-Bit No Missing Codes
n Low Power: 13.5mW at 1Msps, 13.5µW at 1ksps
n 94.7dB SNR (Typ) at fIN = 2kHz
n118dB THD (Typ) at fIN = 2kHz
n Guaranteed Operation to 125°C
n 2.5V Supply
n Pseudo-Differential Unipolar Input Range: 0V to VREF
n VREF Input Range from 2.5V to 5.1V
n No Pipeline Delay, No Cycle Latency
n 1.8V to 5V I/O Voltages
n SPI-Compatible Serial I/O with Daisy-Chain Mode
n Internal Conversion Clock
n 16-Lead MSOP and 4mm × 3mm DFN Packages
APPLICATIONS
n Medical Imaging
n High Speed Data Acquisition
n Portable or Compact Instrumentation
n Industrial Process Control
n Low Power Battery-Operated Instrumentation
n ATE
LTC2368-16
16-Bit, 1Msps, Pseudo-
Differential Unipolar SAR
ADC with 94.7dB SNR
DESCRIPTION
The LTC®2368-16 is a low noise, low power, high speed
16-bit successive approximation register (SAR) ADC.
Operating from a 2.5V supply, the LTC2368-16 has a 0V
to VREF pseudo-differential unipolar input range with VREF
ranging from 2.5V to 5.1V. The LTC2368-16 consumes
only 13.5mW and achieves ±0.75LSB INL maximum, no
missing codes at 16 bits with 94.7dB SNR.
The LTC2368-16 has a high speed SPI-compatible serial
interface that supports 1.8V, 2.5V, 3.3V and 5V logic
while also featuring a daisy-chain mode. The fast 2Msps
throughput with no cycle latency makes the LTC2368-16
ideally suited for a wide variety of high speed applications.
An internal oscillator sets the conversion time, easing exter-
nal timing considerations. The LTC2368-16 automatically
powers down between conversions, leading to reduced
power dissipation that scales with the sampling rate.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents, including 7705765.
TYPICAL APPLICATION
2.5V 1.8V TO 5V
VREF
0V
+
LT®6202
10µF
0.1µF
10Ω
IN+
VDD
OVDD
CHAIN
RDL/SDI
10nF
LTC2368-16
SDO
SCK
INBUSY
REF GND CNV
2.5V TO 5.1V
236816 TA01a
47µF
(X5R, 0805 SIZE)
SAMPLE CLOCK
32k Point FFT fS = 1Msps, fIN = 2kHz
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
SNR = 94.7dB
THD = –118dB
SINAD = 94.7dB
SFDR = 119dB
100 200 300 400 500
FREQUENCY (kHz)
236816 TA01b
236816f
1

1 Page



LTC2368-16 pdf, ピン配列
LTC2368-16
E LECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN TYP
MAX
VIN+
VIN
VIN+ – VIN
IIN
Absolute Input Range (IN+)
Absolute Input Range (IN)
Input Differential Voltage Range
Analog Input Leakage Current
(Note 5)
(Note 5)
VIN = VIN+ – VIN
l –0.1
l –0.1
l0
l
VREF + 0.1
0.1
VREF
±1
CIN Analog Input Capacitance
Sample Mode
Hold Mode
45
5
CMRR
Input Common Mode Rejection Ratio
fIN = 500kHz
80
UNITS
V
V
V
µA
pF
pF
dB
C ONVERTER CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Resolution
l 16
Bits
No Missing Codes
l 16
Bits
Transition Noise
INL Integral Linearity Error
(Note 6)
l –0.75
0.5
±0.1
LSBRMS
0.75 LSB
DNL Differential Linearity Error
l –0.5 ±0.1
0.5
LSB
ZSE Zero-Scale Error
(Note 7)
l –4
0
4
LSB
Zero-Scale Error Drift
4 mLSB/°C
FSE Full-Scale Error
(Note 7)
l –20
±2
20
LSB
Full-Scale Error Drift
±0.1 ppm/°C
DYNAMIC ACCURACY The l denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at TA = 25°C and AIN = –1dBFS. (Notes 4, 8)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
SINAD Signal-to-(Noise + Distortion) Ratio
SNR Signal-to-Noise Ratio
THD
SFDR
Total Harmonic Distortion
Spurious Free Dynamic Range
–3dB Input Bandwidth
fIN = 2kHz, VREF = 5V
fIN = 2kHz, VREF = 5V, (H-Grade)
fIN = 2kHz, VREF = 5V
fIN = 2kHz, VREF = 2.5V
fIN = 2kHz, VREF = 5V, (H-Grade)
fIN = 2kHz, VREF = 2.5V, (H-Grade)
fIN = 2kHz, VREF = 5V
fIN = 2kHz, VREF = 2.5V
fIN = 2kHz, VREF = 5V
l 91.9 94.7
l 91.7 94.7
l 92.5
l 87.7
94.7
90.7
l 92.2
l 87.3
94.7
90.7
l –118 –101
l –116 –101
l 102
120
34
dB
dB
dB
dB
dB
dB
dB
dB
dB
MHz
Aperture Delay
500 ps
Aperture Jitter
4 ps
Transient Response
Full-Scale Step
460 ns
236816f
3


3Pages


LTC2368-16 電子部品, 半導体
LTC2368-16
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VDD = 2.5V, OVDD = 2.5V, REF = 5V,
fSMPL = 1Msps, unless otherwise noted.
Integral Nonlinearity
vs Output Code
1.0
0.8
0.6
0.4
0.2
0.0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384 32768 49152 65536
OUTPUT CODE
236816 G01
Differential Nonlinearity
vs Output Code
0.5
0.4
0.3
0.2
0.1
0.0
–0.1
–0.2
–0.3
–0.4
–0.5
0
16384 32768 49152 65536
OUTPUT CODE
236816 G02
DC Histogram
100000 σ = 0.5
90000
80000
70000
60000
50000
40000
30000
20000
10000
0
32676 32677 32678
CODE
32679
32680
236816 G03
32k Point FFT fS = 1Msps,
fIN = 2kHz
0 SNR = 94.7dB
–20 THD = –118dB
SINAD = 94.7dB
–40 SFDR = 119dB
–60
–80
–100
–120
–140
–160
–180
0
100 200 300 400 500
FREQUENCY (kHz)
236816 G04
SNR, SINAD vs Input Frequency
100
95 SNR
90
SINAD
85
80
75
70
0 25 50 75 100 125 150 175 200
FREQUENCY (kHz)
236816 G05
THD, Harmonics
vs Input Frequency
–60
–70
–80
–90
–100
–110
–120
THD
3RD
2ND
–130
–140
–150
–160
0
25 50 75 100 125 150 175 200
FREQUENCY (kHz)
236816 G06
SNR, SINAD vs Input level,
fIN = 2kHz
96.0
95.5
95.0 SNR
94.5 SINAD
94.0
93.5
93.0
–40
–30 –20
–10
INPUT LEVEL (dB)
0
236816 G07
SNR, SINAD vs Reference
Voltage, fIN = 2kHz
95
94
SNR SINAD
93
92
91
90
2.5
3 3.5 4 4.5
REFERENCE VOLTAGE (V)
5
236816 G08
THD, Harmonics vs Reference
Voltage, fIN = 2kHz
–100
–105
–110
–115
THD
–120
2ND
–125
–130
3RD
–135
–140
–145
–150
2.5
3 3.5 4 4.5
REFERENCE VOLTAGE (V)
5
236816 G09
236816f
6

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