LTC2260-12 Просмотр технического описания (PDF) - Linear Technology
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LTC2260-12 Datasheet PDF : 32 Pages
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LTC2261-12
LTC2260-12/LTC2259-12
ANALOG INPUT The l denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at TA = 25°C. (Note 5)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN
VIN(CM)
VSENSE
IINCM
IIN1
IIN2
IIN3
tAP
tJITTER
CMRR
Analog Input Range (AIN+ – AIN–)
1.7V < VDD < 1.9V
l
Analog Input Common Mode (AIN+ + AIN–)/2 Differential Analog Input (Note 8) l VCM – 100mV
External Voltage Reference Applied to SENSE External Reference Mode
l
0.625
Analog Input Common Mode Current
Analog Input Leakage Current
PAR/SER Input Leakage Current
SENSE Input Leakage Current
Per Pin, 125Msps
Per Pin, 105Msps
Per Pin, 80Msps
0 < AIN+, AIN– < VDD, No Encode l
–1
0 < PAR/SER < VDD
l
–3
0.625V < SENSE < 1.3V
l
–6
Sample-and-Hold Acquisition Delay Time
Sample-and-Hold Acquisition Delay Jitter
Analog Input Common Mode Rejection Ratio
1 to 2
VCM
1.250
155
130
100
0
0.17
80
VCM + 100mV
1.300
1
3
6
VP-P
V
V
μA
μA
μA
μA
μA
μA
ns
psRMS
dB
BW-3B Full-Power Bandwidth
Figure 6 Test Circuit
800
MHz
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)
LTC2261-12
LTC2260-12
LTC2259-12
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
SNR
Signal-to-Noise Ratio
5MHz Input
70.8
70.8
70.6
dB
70MHz Input
l 69.4 70.7
69.4 70.7
69.1 70.5
dB
140MHz Input
70.4
70.4
70.2
dB
SFDR Spurious Free Dynamic Range 5MHz Input
88
88
88
dB
2nd or 3rd Harmonic
70MHz Input
l 76 85
76 85
79 85
dB
140MHz Input
82
82
82
dB
Spurious Free Dynamic Range 5MHz Input
90
90
90
dB
4th Harmonic or Higher
70MHz Input
l 83 90
82 90
85 90
dB
140MHz Input
90
90
90
dB
S/(N+D) Signal-to-Noise Plus
5MHz Input
70.6
70.6
70.4
dB
Distortion Ratio
70MHz Input
l 68.6 70.4
68.6 70.4
68.8 70.3
dB
140MHz Input
70
70
69.9
dB
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
IOUT = 0
–600μA < IOUT < 1mA
IOUT = 0
0.5 • VDD – 25mV
1.225
0.5 • VDD
±25
4
1.250
0.5 • VDD + 25mV
1.275
V
ppm/°C
Ω
V
VREF Output Temperature Drift
VREF Output Resistance
VREF Line Regulation
–400μA < IOUT < 1mA
1.7V < VDD < 1.9V
±25
ppm/°C
7
Ω
0.6
mV/V
226112f
4
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