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PDF LTC2226 Data sheet ( Hoja de datos )
| Número de pieza | LTC2226 | |
| Descripción | 65/40/25Msps Low Power 3V ADCs | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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FEATURES
■ Sample Rate: 65Msps/40Msps/25Msps
■ Single 3V Supply (2.7V to 3.4V)
■ Low Power: 205mW/120mW/75mW
■ 71dB SNR up to 70MHz Input
■ 80dB SFDR up to 140MHz Input
■ No Missing Codes
■ Flexible Input: 1VP-P to 2VP-P Range
■ 575MHz Full Power Bandwidth S/H
■ Clock Duty Cycle Stabilizer
■ Shutdown and Nap Modes
■ Pin Compatible Family
80Msps: LTC2229 (12-Bit), LTC2249 (14-Bit)
65Msps: LTC2228 (12-Bit), LTC2248 (14-Bit)
40Msps: LTC2227 (12-Bit), LTC2247 (14-Bit)
25Msps: LTC2226 (12-Bit), LTC2246 (14-Bit)
10Msps: LTC2225 (12-Bit), LTC2245 (14-Bit)
■ 32-Pin (5mm × 5mm) QFN Package
U
APPLICATIO S
■ Wireless and Wired Broadband Communication
■ Imaging Systems
■ Ultrasound
■ Spectral Analysis
■ Portable Instrumentation
TYPICAL APPLICATIO
REFH
REFL
FLEXIBLE
REFERENCE
ANALOG
INPUT
+
INPUT
S/H
–
12-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC
CLOCK/DUTY
CYCLE
CONTROL
CLK
LTC2228/LTC2227/LTC2226
12-Bit, 65/40/25Msps
Low Power 3V ADCs
DESCRIPTIO
The LTC®2228/LTC2227/LTC2226 are 12-bit 65Msps/
40Msps/25Msps, low power 3V A/D converters designed
for digitizing high frequency, wide dynamic range signals.
The LTC2228/LTC2227/LTC2226 are perfect for demand-
ing imaging and communications applications with AC
performance that includes 71dB SNR and 80dB SFDR for
signals well beyond the Nyquist frequency.
DC specs include ±0.3LSB INL (typ), ±0.15LSB DNL (typ)
and no missing codes over temperature. The transition
noise is a low 0.25LSBRMS.
A single 3V supply allows low power operation. A separate
output supply allows the outputs to drive 0.5V to 3.3V
logic.
A single-ended CLK input controls converter operation. An
optional clock duty cycle stabilizer allows high perfor-
mance at full speed for a wide range of clock duty cycles.
, LTC and LT are registered trademarks of Linear Technology Corporation.
OUTPUT
DRIVERS
OVDD
D11
•
•
•
D0
OGND
LTC2228: SNR vs Input Frequency,
–1dB, 2V Range, 65Msps
72
71
70
69
222876 TA01
68
0 50 100 150 200
INPUT FREQUENCY (MHz)
2228 G09
222876f
1
1 page  
LTC2228/LTC2227/LTC2226
POWER REQUIRE E TS The ● denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. (Note 8)
SYMBOL PARAMETER
CONDITIONS
LTC2228
LTC2227
LTC2226
MIN TYP MAX MIN TYP MAX MIN TYP MAX
UNITS
VDD
Analog Supply
(Note 9)
Voltage
● 2.7 3 3.4 2.7 3 3.4 2.7 3 3.4
V
OVDD
Output Supply
Voltage
(Note 9)
● 0.5 3 3.6 0.5 3 3.6 0.5 3 3.6
V
IVDD
PDISS
PSHDN
Supply Current
Power Dissipation
Shutdown Power
SHDN = H,
OE = H, No CLK
●
●
68.3 80
205 240
2
40 48
120 144
2
25 30
75 90
2
mA
mW
mW
PNAP Nap Mode Power SHDN = H,
OE = L, No CLK
15 15 15 mW
WU
TI I G CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. (Note 4)
SYMBOL
fs
tL
tH
tAP
tD
Pipeline
Latency
PARAMETER
CONDITIONS
Sampling Frequency (Note 9)
●
CLK Low Time
Duty Cycle Stabilizer Off ●
Duty Cycle Stabilizer On ●
(Note 7)
CLK High Time
Duty Cycle Stabilizer Off ●
Duty Cycle Stabilizer On ●
(Note 7)
Sample-and-Hold
Aperture Delay
CLK to DATA Delay
Data Access Time
After OE↓
CL = 5pF (Note 7)
CL = 5pF (Note 7)
●
●
BUS Relinquish Time (Note 7)
●
LTC2228
MIN TYP MAX
1 65
7.3 7.7 500
5 7.7 500
7.3 7.7 500
5 7.7 500
0
1.4 2.7 5.4
4.3 10
3.3 8.5
6
LTC2227
MIN TYP MAX
1 40
11.8 12.5 500
5 12.5 500
11.8 12.5 500
5 12.5 500
0
1.4 2.7 5.4
4.3 10
3.3 8.5
6
LTC2226
MIN TYP MAX
1 25
18.9 20 500
5 20 500
18.9 20 500
5 20 500
0
1.4 2.7 5.4
4.3 10
3.3 8.5
6
UNITS
MHz
ns
ns
ns
ns
ns
ns
ns
ns
Cycles
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All voltage values are with respect to ground with GND and OGND
wired together (unless otherwise noted).
Note 3: When these pin 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: VDD = 3V, fSAMPLE = 65MHz (LTC2228), 40MHz (LTC2227), or
25MHz (LTC2226), input range = 2VP-P with differential drive, unless
otherwise noted.
Note 5: Integral nonlinearity is defined as the deviation of a code from a
straight line passing through the actual endpoints of the transfer curve.
The deviation is measured from the center of the quantization band.
Note 6: Offset error is the offset voltage measured from –0.5 LSB when
the output code flickers between 0000 0000 0000 and 1111 1111 1111.
Note 7: Guaranteed by design, not subject to test.
Note 8: VDD = 3V, fSAMPLE = 65MHz (LTC2228), 40MHz (LTC2227), or
25MHz (LTC2226), input range = 1VP-P with differential drive.
Note 9: Recommend operating conditions.
222876f
5
5 Page 
LTC2228/LTC2227/LTC2226
TYPICAL PERFOR A CE CHARACTERISTICS
LTC2226: SFDR vs Input
Frequency, –1dB, 2V Range,
25Msps
100
95
90
85
80
75
70
65
0
50 100 150
INPUT FREQUENCY (MHz)
200
2226 G10
LTC2226: SNR and SFDR vs
Sample Rate, 2V Range,
fIN = 5MHz, –1dB
110
SFDR
100
90
80
SNR
70
60
0 10 20 30 40 50
SAMPLE RATE (Msps)
2226 G11
LTC2226: SFDR vs Input Level,
fIN = 5MHz, 2V Range, 25Msps
120
110 dBFS
100
90
80 dBc
70
60
90dBc SFDR
50 REFERENCE LINE
40
30
20
–60
–50 – 40 –30 –20 –10
INPUT LEVEL (dBFS)
0
2226 G13
LTC2226: IVDD vs Sample Rate,
5MHz Sine Wave Input, –1dB
35
30
2V RANGE
25
1V RANGE
20
15
0 5 10 15 20 25 30 35
SAMPLE RATE (Msps)
2226 G14
LTC2226: SNR vs Input Level,
fIN = 5MHz, 2V Range, 25Msps
80
dBFS
70
60
50
dBc
40
30
20
10
0
–60 –50 – 40 –30 –20 –10
INPUT LEVEL (dBFS)
0
2227 G12
LTC2226: IOVDD vs Sample Rate,
5MHz Sine Wave Input, –1dB,
OVDD = 1.8V
3
2
1
0
0 5 10 15 20 25 30 35
SAMPLE RATE (Msps)
2226 G15
222876f
11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet LTC2226.PDF ] | |
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