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PDF LTC2269 Data sheet ( Hoja de datos )
| Número de pieza | LTC2269 | |
| Descripción | 20Msps Low Noise ADC | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LTC2269 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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FEATURES
n 84.1dB SNR (46μVRMS Input Referred Noise)
n 99dB SFDR
n ±2.3LSB INL(Maximum)
n Low Power: 88mW
n Single 1.8V Supply
n CMOS, DDR CMOS, or DDR LVDS Outputs
n Selectable Input Ranges: 1VP-P to 2.1VP-P
n 200MHz Full Power Bandwidth S/H
n Shutdown and Nap Modes
n Serial SPI Port for Configuration
n Pin Compatible with
LTC2160:16-Bit, 25Msps, 45mW
n 48-Lead (7mm × 7mm) QFN Package
APPLICATIONS
n Low Power Instrumentation
n Software Defined Radios
n Portable Medical Imaging
n Multichannel Data Acquisition
LTC2269
16-Bit, 20Msps
Low Noise ADC
DESCRIPTION
The LTC®2269 is a sampling 16-bit A/D converter designed
for digitizing high frequency, wide dynamic range signals.
It is perfect for demanding communications applications
with AC performance that includes 84.1dB SNR and 99dB
spurious free dynamic range (SFDR).
DC specs include ±1LSB INL (typ), ±0.2LSB DNL (typ)
and no missing codes over temperature. The transition
noise is 1.44LSBRMS.
The digital outputs can be either full rate CMOS, double
data rate CMOS, or double data rate LVDS. A separate
output power supply allows the CMOS output swing to
range from 1.2V to 1.8V.
The ENC+ and ENC– inputs may be driven differentially
or single-ended with a sine wave, PECL, LVDS, TTL, or
CMOS inputs. An optional clock duty cycle stabilizer al-
lows high performance at full speed for a wide range of
clock duty cycles.www.DataSheet.net/
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
1.8V
VDD
ANALOG
INPUT
S/H
16-BIT
ADC CORE
20MHz
CLOCK
2269 TA01
CLOCK
CONTROL
GND
1.8V
OVDD
OUTPUT
DRIVERS
OGND
D15
t CMOS
t DDR CMOS OR
t DDR LVDS
D0 OUTPUTS
Integral Non-Linearity (INL)
2.0
1.5
1.0
0.5
0.0
–0.5
–1.0
–1.5
–2.0
0
16384 32768 49152 65536
OUTPUT CODE
2269 TA02
2269f
1
Datasheet pdf - http://www.DataSheet4U.co.kr/
1 page  
LTC2269
DYNAMIC ACCURACY The l denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at TA = 25°C. AIN = –1dBFS. (Note 5)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
SFDR Spurious Free Dynamic Range
3rd Harmonic
1.4MHz Input
5MHz Input
30MHz Input
70MHz Input
l 92
99
98
98
96
dBFS
dBFS
dBFS
dBFS
SFDR Spurious Free Dynamic Range
4th Harmonic or Higher
1.4MHz Input
5MHz Input
30MHz Input
70MHz Input
l 95
110
110
105
100
dBFS
dBFS
dBFS
dBFS
S/(N+D) Signal-to-Noise Plus Distortion Ratio
1.4MHz Input
5MHz Input
30MHz Input
70MHz Input
l 81.7
83.9
83.9
83.7
82
dBFS
dBFS
dBFS
dBFS
INTERNAL REFERENCE CHARACTERISTICS The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VCM Output Voltage
VCM Output Temperature Drift
VCM Output Resistance
VREF Output Voltage
VREF Output Temperature Drift
VREF Output Resistance
VREF Line Regulation
IOUT = 0
–600μA < IOUT < 1mA
IOUT = 0
–400μA < IOUT < 1mA
1.7V < VDD < 1.9V
l 0.5•VDD – 25mV 0.5•VDD 0.5•VDD + 25mV
±25
V
ppm/°C
4Ω
l 1.230
1.250
1.270
V
±25 ppm/°C
www.DataSheet.net/
7Ω
0.6 mV/V
DIGITAL INPUTS AND OUTPUTS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 5)
SYMBOL
PARAMETER
ENCODE INPUTS (ENC+, ENC–)
CONDITIONS
MIN TYP MAX UNITS
DIFFERENTIAL ENCODE MODE (ENC– NOT TIED TO GND)
VID
Differential Input Voltage
(Note 8)
l 0.2
V
VICM
Common Mode Input Voltage
Internally Set
Externally Set (Note 8)
VIN Input Voltage Range
ENC+, ENC– to GND
1.2
l 1.1
1.6
l 0.2
3.6
V
V
V
RIN Input Resistance
CIN Input Capacitance
SINGLE-ENDED ENCODE MODE (ENC– TIED TO GND)
(See Figure 10)
(Note 8)
10 kΩ
3.5 pF
VIH High Level Input Voltage VDD = 1.8V
VIL Low Level Input Voltage VDD = 1.8V
VIN Input Voltage Range
ENC+ to GND
RIN Input Resistance
(See Figure 11)
CIN Input Capacitance
(Note 8)
l 1.2
l 0.6
l0
3.6
30
3.5
V
V
V
kΩ
pF
2269f
5
Datasheet pdf - http://www.DataSheet4U.co.kr/
5 Page 
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2269
Integral Non-Linearity (INL)
2.0
1.5
1.0
0.5
0.0
–0.5
–1.0
–1.5
–2.0
0
16384 32768 49152
OUTPUT CODE
65536
2269 G01
Differential Non-Linearity (DNL)
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384 32768 49152 65536
OUTPUT CODE
2269 G02
64k Point FFT, fIN = 1.4MHz,
–1dBFS, 20Msps
0
–20
–40
–60
–80
–100
–120
–140
0
2 4 6 8 10
FREQUENCY (MHz)
2269 G03
64k Point FFT, fIN = 5.1MHz,
–1dBFS, 20Msps
0
–20
–40
–60
–80
–100
–120
–140
0
2 4 6 8 10
FREQUENCY (MHz)
2269 G04
64k Point FFT, fIN = 10MHz,
–1dBFS, 20Msps
0
–20
–40
–60
www.DataSheet.net/
–80
–100
–120
–140
0
2 4 6 8 10
FREQUENCY (MHz)
2269 G05
64k Point FFT, fIN = 30.3MHz,
–1dBFS, 20Msps
0
–20
–40
–60
–80
–100
–120
–140
0
2 4 6 8 10
FREQUENCY (MHz)
2269 G06
64k Point FFT, fIN = 70.3MHz,
–1dBFS, 20Msps
0
–20
–40
–60
–80
–100
–120
–140
0
2 4 6 8 10
FREQUENCY (MHz)
2269 G07
64k Point 2-Tone FFT, fIN = 14.8,
15.2MHz, –7dBFS, 20Msps
0
–20
–40
–60
–80
–100
–120
–140
0
2 4 6 8 10
FREQUENCY (MHz)
2269 G08
Shorted Input Histogram
40000
35000
30000
25000
20000
15000
10000
5000
0
OUTPUT CODE
2269 G09
2269f
11
Datasheet pdf - http://www.DataSheet4U.co.kr/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LTC2269.PDF ] | |
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