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PDF LTC2152-14 Data sheet ( Hoja de datos )
| Número de pieza | LTC2152-14 | |
| Descripción | 14-Bit 250Msps/ 210Msps/170Msps ADCs | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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FEATURES
n 70dB SNR
n 90dB SFDR
n Low Power: 338mW/316mW/290mW Total
n Single 1.8V Supply
n DDR LVDS Outputs
n Easy-to-Drive 1.5VP-P Input Range
n 1.25GHz Full Power Bandwidth S/H
n Optional Clock Duty Cycle Stabilizer
n Low Power Sleep and Nap Modes
n Serial SPI Port for Configuration
n Pin Compatible with 12-Bit Versions
n 40-Pin (6mm × 6mm) QFN Package
APPLICATIONS
n Communications
n Cellular Basestations
n Software Defined Radios
n Medical Imaging
n High Definition Video
n Testing and Measurement Instruments
Electrical Specifications Subject to Change
LTC2152-14/
LTC2151-14/LTC2150-14
14-Bit 250Msps/
210Msps/170Msps ADCs
DESCRIPTION
The LTC®2152-14/LTC2151-14/LTC2150-14 are 250Msps/
210Msps/170Msps 14-bit A/D converters designed for
digitizing high frequency, wide dynamic range signals. They
are perfect for demanding communications applications
with AC performance that includes 70dB SNR and 90dB
spurious free dynamic range (SFDR). The latency is only
five clock cycles.
DC specs include ±0.85LSB INL (typ), ±0.25LSB DNL (typ)
and no missing codes over temperature. The transition
noise is 1.82LSBRMS.
The digital outputs are Double-Data Rate (DDR) LVDS.
The ENC+ and ENC– inputs can be driven differentially with
a sine wave, PECL, LVDS, TTL, or CMOS inputs. An optional
clock duty cycle stabilizer allows high performance at full
speed for a wide range of clock duty cycles.
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
ANALOG
INPUT
S/H
CLOCK
CLOCK/DUTY
CYCLE
CONTROL
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VDD
14-BIT
PIPELINED
ADC
CORRECTION
LOGIC
OUTPUT
DRIVERS
OVDD
D12_13
•
•
•
D0_1
DDR
LVDS
OGND
21521014 TA01a
32K Point FFT,
fIN = 15MHz, –1dBFS, 250Msps
0
–20
–40
–60
–80
–100
–120
0
20 40 60 80 100 120
FREQUENCY (MHz)
21521014 TA01b
21521014p
1
1 page  
LTC2152-14/
LTC2151-14/LTC2150-14
D IGITAL 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
CONDITIONS
MIN TYP MAX UNITS
DIGITAL DATA OUTPUTS
VOD
VOS
RTERM
Differential Output Voltage
Common Mode Output Voltage
On-Chip Termination Resistance
100Ω Differential Load, 3.5mA Mode
100Ω Differential Load, 1.75mA Mode
100Ω Differential Load, 3.5mA Mode
100Ω Differential Load, 1.75mA Mode
Termination Enabled, OVDD = 1.8V
l 247
l 125
l 1.125
l 1.125
350
175
1.250
1.250
100
454
250
1.375
1.375
mV
mV
V
V
Ω
TIMING CHARACTERISTICS 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
LTC2152-14
LTC2151-14
LTC2150-14
MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
fS Sampling Frequency (Note 9)
l 10
250 10
210 10
170 MHz
tL
ENC Low Time (Note 8) Duty Cycle Stabilizer Off l 1.9 2 50 2.26 2.38 50 2.79 2.94 50
ns
Duty Cycle Stabilizer On l 1.9 2 50 1.5 2.38 50 1.5 2.94 50
ns
tH
ENC High Time (Note 8) Duty Cycle Stabilizer Off l 1.9 2 50 2.26 2.38 50 2.79 2.94 50
Duty Cycle Stabilizer On l 1.9 2 50 1.5 2.38 50 1.5 2.94 50
ns
ns
DIGITAL DATA OUTPUTS
SYMBOL PARAMETER
tD
tC
tSKEW
ENC to Data Delay
ENC to CLKOUT Delay
DATA to CLKOUT Skew
Pipeline Latency
SPI Port Timing (Note 8)
tSCK SCK Period
tS CS to SCK Set-Up Time
tH SCK to CS Hold Time
tDS SDI Set-Up Time
tDH SDI Hold Time
tDO SCK Falling to SDO Valid
CONDITIONS
CL = 5pF
CL = 5pF
tD – tC
LTC215X-14
MIN TYP MAX
l 1.7 2 2.3
l 1.3
1.6
2
l 0.3
0.4 0.55
55
Write Mode, CSDO = 20pF
Readback Mode RPULLUP = 2k, CSDO = 20pF
Readback Mode RPULLUP = 2k, CSDO = 20pF
l
l
l
l
l
40
250
5
5
5
5
125
UNITS
ns
ns
ns
Cycles
ns
ns
ns
ns
ns
ns
ns
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All voltage values are with respect to GND with GND and OGND
shorted (unless otherwise noted).
wwwNo.Dtea3t:aWShheeentt4hUes.ceopmin voltages are taken below GND or above VDD, they
will be clamped by internal diodes. This product can handle input currents
of greater than 100mA below GND or above VDD without latchup.
Note 4: When these pin voltages are taken below GND they will be
clamped by internal diodes. When these pin voltages are taken above VDD
they will not be clamped by internal diodes. This product can handle input
currents of greater than 100mA below GND without latchup.
Note 5: VDD = OVDD = 1.8V, fSAMPLE = 250MHz (LTC2152),
210MHz (LTC2151), or 170MHz (LTC2150), LVDS outputs, differential
ENC+/ENC– = 2VP-P sine wave, input range = 1.5VP-P with differential
drive, unless otherwise noted.
Note 6: Integral nonlinearity is defined as the deviation of a code from a
best fit straight line to the transfer curve. The deviation is measured from
the center of the quantization band.
Note 7: Offset error is the offset voltage measured from –0.5LSB when the
output code flickers between 00 0000 0000 0000 and 11 1111 1111 1111
in 2’s complement output mode.
Note 8: Guaranteed by design, not subject to test.
Note 9: Recommended operating conditions.
21521014p
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5 Page 
LTC2152-14/
LTC2151-14/LTC2150-14
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2151-14: SNR vs Input
L2e1v0eMl,spfIsN = 71MHz, 1.5V Range,
70 dBFS
60
20
10
0
50
dBc
40
30
–10
–20
–30
–40
20 –50
10 –60
0
–60 –50 –40 –30 –20 –10
–70
0
AMPLITUDE (dBFS)
21521014 G37
LTC2151-14: SFDR vs Input Level,
–1dBFS, 1.5V Range, 210Msps
90
80
70
60
50
40
30
20
10
0
0 100 200 300 400 500 600 700 800 900 1000
INPUT FREQUENCY (MHz)
21521014 G38
LTC2151-14: SNR vs Input Level,
–1dBFS, 1.5V Range, 210Msps
75
70
65
60
55
50
45
40
0 100 200 300 400 500 600 700 800 900 1000
INPUT FREQUENCY (MHz)
21521014 G39
LTC2151-14: Frequency Response
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
–4.5
–5.0
–5.5
–6.0
100 1000
INPUT FREQUENCY (MHz)
21521014 G40
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21521014p
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| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LTC2152-14.PDF ] | |
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