222211f.pm65
LTC2222-11
1
222211f
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
Sample Rate: 105Msps
65.4dB SNR up to 140MHz Input
80dB SFDR up to 150MHz Input
775MHz Full Power Bandwidth S/H
Single 3.3V Supply
Low Power Dissipation: 475mW
CMOS Outputs
Selectable Input Ranges:
0.5V or 1V
No Missing Codes
Optional Clock Duty Cycle Stabilizer
Shutdown and Nap Modes
Data Ready Output Clock
Pin Compatible Family
135Msps: LTC2224 (12-Bit), LTC2234 (10-Bit)
105Msps: LTC2222 (12-Bit), LTC2232 (10-Bit)
80Msps: LTC2223 (12-Bit), LTC2233 (10-Bit)
48-Pin 7mm
7mm QFN Package
Wireless and Wired Broadband Communication
Cable Head-End Systems
Power Amplifier Linearization
Communications Test Equipment
11-Bit, 105Msps ADC
The LTC
2222-11 is a 105Msps, sampling 11-bit A/D
converter designed for digitizing high frequency, wide
dynamic range signals. The LTC2222-11 is perfect for
demanding communications applications with AC perfor-
mance that includes 65.4dB SNR and 80dB spurious free
dynamic range for signals up to 150MHz. Ultralow jitter of
0.15ps
RMS
allows undersampling of IF frequencies with
excellent noise performance.
DC specs include
0.15LSB INL (typ), 0.1LSB DNL (typ)
and no missing codes over temperature. The transition
noise is a low 0.25LSB
RMS
.
A separate output power supply allows the CMOS output
swing to range from 0.5V to 3.3V.
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 allows high
performance at full speed for a wide range of clock duty
cycles.
0.5V TO 3.3V
OV
DD
OGND
+
INPUT
S/H
CORRECTION
LOGIC
OUTPUT
DRIVERS
11-BIT
PIPELINED
ADC CORE
CLOCK/DUTY
CYCLE
CONTROL
FLEXIBLE
REFERENCE
D10
D0
ENCODE
INPUT
REFH
REFL
ANALOG
INPUT
222211 TA01
3.3V
V
DD
APPLICATIO S
U
SFDR vs Input Frequency
SFDR (dBFS)
INPUT FREQUENCY (MHz)
0
600
500
400
222211 TA01b
100
200
300
95
90
85
80
75
70
65
60
55
50
4th OR HIGHER
2nd OR 3rd
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
LTC2222-11
2
222211f
CO VERTER CHARACTERISTICS
U
Supply Voltage (V
DD
) ................................................. 4V
Digital Output Ground Voltage (OGND) ....... 0.3V to 1V
Analog Input Voltage (Note 3) ..... 0.3V to (V
DD
+ 0.3V)
Digital Input Voltage .................... 0.3V to (V
DD
+ 0.3V)
Digital Output Voltage ............... 0.3V to (OV
DD
+ 0.3V)
Power Dissipation ............................................ 1500mW
Operating Temperature Range
LTC2222-11C .......................................... 0
C to 70C
LTC2222-11I .......................................40
C to 85C
Storage Temperature Range ..................65
C to 125C
ORDER PART NUMBER
UK PART MARKING*
T
JMAX
= 125
C,
JA
= 29
C/W
LTC2222UK-11
LTC2222CUK-11
LTC2222IUK-11
ABSOLUTE AXI U
RATI GS
W
W
W
U
PACKAGE/ORDER I FOR ATIO
U
U
W
OV
DD
= V
DD
(Notes 1, 2)
The
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25
C. (Note 4)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Resolution (No Missing Codes)
11
Bits
Integral Linearity Error
Differential Analog Input (Note 5)
1
0.15
1
LSB
Differential Linearity Error
Differential Analog Input
0.8
0.1
0.8
LSB
Integral Linearity Error
Single-Ended Analog Input (Note 5)
0.5
LSB
Differential Linearity Error
Single-Ended Analog Input
0.1
LSB
Offset Error
(Note 6)
37
3
37
mV
Gain Error
External Reference
2.5
0.5
2.5
%FS
Offset Drift
10
V/C
Full-Scale Drift
Internal Reference
30
ppm/
C
External Reference
15
ppm/
C
Transition Noise
SENSE = 1V
0.25
LSB
RMS
Consult LTC Marketing for parts specified with wider operating temperature ranges.
*The temperature grade is identified by a label on the shipping container.
TOP VIEW
UK PACKAGE
48-LEAD (7mm
7mm) PLASTIC QFN
EXPOSED PAD IS GND (PIN 49),
MUST BE SOLDERED TO PCB
A
IN
+
1
A
IN
2
REFHA 3
REFHA 4
REFLB
5
REFLB
6
REFHB 7
REFHB 8
REFLA 9
REFLA 10
V
DD
11
V
DD
12
36 D8
35 D7
34 D6
33 OV
DD
32 OGND
31 D5
30 D4
29 D3
28 OV
DD
27 OGND
26 D2
25 D1
49
48 GND
47 V
DD
46 V
DD
45 GND
44 V
CM
43 SENSE
42 MODE
41 OF
40 D10
39 D9
38 OGND
37 OV
DD
GND 13
V
DD
14
GND 15
ENC
+
16
ENC
17
SHDN
18
OE
19
CLOCKOUT
20
NC 21
OGND 22
OV
DD
23
D0 24
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
http://www.linear.com/leadfree/
LTC2222-11
3
222211f
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
IN
Analog Input Range (A
IN
+
A
IN
)
3.1V < V
DD
< 3.5V
0.5 to 1
V
V
IN, CM
Analog Input Common Mode (A
IN
+
+ A
IN
)/2
Differential Input Drive
1
1.6
1.9
V
Single Ended Input Drive
0.5
1.6
2.1
V
I
IN
Analog Input Leakage Current
0 < A
IN
+
, A
IN
< V
DD
1
1
A
I
SENSE
SENSE Input Leakage
0V < SENSE < 1V
1
1
A
I
MODE
MODE Pin Pull-Down Current to GND
10
A
t
AP
Sample and Hold Acquisition Delay Time
0
ns
t
JITTER
Sample and Hold Acquisition Delay Time Jitter
0.15
ps
RMS
CMRR
Analog Input Common Mode Rejection Ratio
80
dB
Full Power Bandwidth
Figure 8 Test Circuit
775
MHz
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SNR
Signal-to-Noise Ratio
30MHz Input (1V Range)
62.5
dB
30MHz Input (2V Range)
64.3
65.7
dB
70MHz Input (1V Range)
62.5
dB
70MHz Input (2V Range)
65.7
dB
140MHz Input (1V Range)
62.2
dB
140MHz Input (2V Range)
65.4
dB
250MHz Input (1V Range)
61.8
dB
250MHz Input (2V Range)
64.9
dB
SFDR
Spurious Free Dynamic Range
30MHz Input (1V Range)
84
dB
30MHz Input (2V Range)
71
84
dB
70MHz Input (1V Range)
84
dB
70MHz Input (2V Range)
84
dB
140MHz Input (1V Range)
81
dB
140MHz Input (2V Range)
81
dB
250MHz Input (1V Range)
77
dB
250MHz Input (2V Range)
77
dB
SFDR
Spurious Free Dynamic Range
30MHz Input (1V Range)
88
dB
4th Harmonic or Higher
30MHz Input (2V Range)
88
dB
70MHz Input (1V Range)
88
dB
70MHz Input (2V Range)
88
dB
140MHz Input (1V Range)
88
dB
140MHz Input (2V Range)
88
dB
250MHz Input (1V Range)
85
dB
250MHz Input (2V Range)
85
dB
S/(N+D)
Signal-to-Noise Plus
30MHz Input (1V Range)
62.5
dB
Distortion Ratio
30MHz Input (2V Range)
64
65.6
dB
70MHz Input (1V Range)
62.5
dB
70MHz Input (2V Range)
65.6
dB
IMD
Intermodulation Distortion
f
IN1
= 138MHz, f
IN2
= 140MHz
81
dBc
A ALOG I PUT
U
U
DY
A
IC ACCURACY
U
W
The
denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T
A
= 25
C. (Note 4)
The
denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25
C. A
IN
= 1dBFS. (Note 4)
LTC2222-11
4
222211f
DIGITAL I PUTS A D DIGITAL OUTPUTS
U
U
The
denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25
C. (Note 4)
I TER AL REFERE CE CHARACTERISTICS
U
U
U
(Note 4)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
CM
Output Voltage
I
OUT
= 0
1.575
1.600
1.625
V
V
CM
Output Tempco
25
ppm/
C
V
CM
Line Regulation
3.1V < V
DD
< 3.5V
3
mV/V
V
CM
Output Resistance
1mA < I
OUT
< 1mA
4
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ENCODE INPUTS (ENC
+
, ENC
)
V
ID
Differential Input Voltage
0.2
V
V
ICM
Common Mode Input Voltage
Internally Set
1.6
V
Externally Set (Note 7)
1.1
1.6
2.5
V
R
IN
Input Resistance
6
k
C
IN
Input Capacitance
(Note 7)
3
pF
LOGIC INPUTS (OE, SHDN)
V
IH
High Level Input Voltage
V
DD
= 3.3V
2
V
V
IL
Low Level Input Voltage
V
DD
= 3.3V
0.8
V
I
IN
Input Current
V
IN
= 0V to V
DD
10
10
A
C
IN
Input Capacitance
(Note 7)
3
pF
LOGIC OUTPUTS
OV
DD
= 3.3V
C
OZ
Hi-Z Output Capacitance
OE = High (Note 7)
3
pF
I
SOURCE
Output Source Current
V
OUT
= 0V
50
mA
I
SINK
Output Sink Current
V
OUT
= 3.3V
50
mA
V
OH
High Level Output Voltage
I
O
= 10
A
3.295
V
I
O
= 200
A
3.1
3.29
V
V
OL
Low Level Output Voltage
I
O
= 10
A
0.005
V
I
O
= 1.6mA
0.09
0.4
V
OV
DD
= 2.5V
V
OH
High Level Output Voltage
I
O
= 200
A
2.49
V
V
OL
Low Level Output Voltage
I
O
= 1.6mA
0.09
V
OV
DD
= 1.8V
V
OH
High Level Output Voltage
I
O
= 200
A
1.79
V
V
OL
Low Level Output Voltage
I
O
= 1.6mA
0.09
V
LTC2222-11
5
222211f
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
DD
Analog Supply Voltage
3.1
3.3
3.5
V
OV
DD
Output Supply Voltage
0.5
3.3
3.6
V
I
VDD
Analog Supply Current
144
162
mA
P
DISS
Power Dissipation
475
535
mW
P
SHDN
Shutdown Power
SHDN = High, OE = High, No CLK
2
mW
P
NAP
Nap Mode Power
SHDN = High, OE = Low, No CLK
35
mW
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
f
S
Sampling Frequency
1
105
MHz
t
L
ENC Low Time
Duty Cycle Stabilizer Off
4.5
4.76
500
ns
Duty Cycle Stabilizer On
3
4.76
500
ns
t
H
ENC High Time
Duty Cycle Stabilizer Off
4.5
4.76
500
ns
Duty Cycle Stabilizer On
3
4.76
500
ns
t
AP
Sample-and-Hold Aperture Delay
0
ns
t
OE
Output Enable Delay
(Note 7)
5
10
ns
t
D
ENC to DATA Delay
(Note 7)
1.3
2.1
4
ns
t
C
ENC to CLOCKOUT Delay
(Note 7)
1.3
2.1
4
ns
DATA to CLOCKOUT Skew
(t
C
- t
D
) (Note 7)
0.6
0
0.6
ns
Pipeline Latency
5
Cycles
TI I G CHARACTERISTICS
U
W
The
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25
C. (Note 4)
POWER REQUIRE E TS
W
U
The
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25
C. (Note 8)
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 V
DD
, they
will be clamped by internal diodes. This product can handle input currents
of greater than 100mA below GND or above V
DD
without latchup.
Note 4: V
DD
= 3.3V, OV
DD
= 1.8V, f
SAMPLE
= 105MHz, differential
ENC
+
/ENC
= 2V
P-P
sine wave, input range = 2V
P-P
with differential drive,
unless otherwise noted.
Note 5: Integral nonlinearity is defined as the deviation of a code from a
"best straight line" fit to 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 000 0000 0000 and 111 1111 1111 in 2's
complement output mode.
Note 7: Guaranteed by design, not subject to test.
Note 8: V
DD
= 3.3V, OV
DD
= 1.8V, f
SAMPLE
= 105MHz, differential
ENC
+
/ENC
= 2V
P-P
sine wave, input range = 1V
P-P
with differential drive,
output C
LOAD
= 5pF.
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