LTC2222-11
11-Bit, 105Msps ADC
FEATURES
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DESCRIPTIO
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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
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
APPLICATIO S
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Wireless and Wired Broadband Communication
Cable Head-End Systems
Power Amplifier Linearization
Communications Test Equipment
TYPICAL APPLICATIO
REFH
REFL
FLEXIBLE
REFERENCE
3.3V
V
DD
0.5V TO 3.3V
OV
DD
95
90
4th OR HIGHER
85
SFDR (dBFS)
80
75
70
65
2nd OR 3rd
+
ANALOG
INPUT
INPUT
S/H
–
11-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC
OUTPUT
DRIVERS
D10
•
•
•
D0
OGND
CLOCK/DUTY
CYCLE
CONTROL
222211 TA01
60
55
50
0
100
200
300
400
500
INPUT FREQUENCY (MHz)
600
ENCODE
INPUT
U
SFDR vs Input Frequency
222211 TA01b
U
U
222211f
1
LTC2222-11
ABSOLUTE
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
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
OV
DD
= V
DD
(Notes 1, 2)
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 70°C
LTC2222-11I .......................................–40°C to 85°C
Storage Temperature Range ..................–65°C to 125°C
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
49
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
UK PACKAGE
48-LEAD (7mm
×
7mm) PLASTIC QFN
EXPOSED PAD IS GND (PIN 49),
MUST BE SOLDERED TO PCB
T
JMAX
= 125°C,
θ
JA
= 29°C/W
ORDER PART NUMBER
LTC2222CUK-11
LTC2222IUK-11
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/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
*The temperature grade is identified by a label on the shipping container.
CO VERTER CHARACTERISTICS
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
PARAMETER
Resolution (No Missing Codes)
Integral Linearity Error
Differential Linearity Error
Integral Linearity Error
Differential Linearity Error
Offset Error
Gain Error
Offset Drift
Full-Scale Drift
Transition Noise
Internal Reference
External Reference
SENSE = 1V
Differential Analog Input (Note 5)
Differential Analog Input
Single-Ended Analog Input (Note 5)
Single-Ended Analog Input
(Note 6)
External Reference
●
●
CONDITIONS
●
●
●
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
UK PART MARKING*
LTC2222UK-11
MIN
11
–1
–0.8
TYP
±0.15
±0.1
±0.5
±0.1
MAX
1
0.8
UNITS
Bits
LSB
LSB
LSB
LSB
–37
–2.5
±3
±0.5
±10
±30
±15
0.25
37
2.5
%FS
µV/°C
ppm/°C
ppm/°C
LSB
RMS
222211f
2
U
mV
W
U
U
W W
W
U
LTC2222-11
A ALOG I PUT
SYMBOL
V
IN
V
IN, CM
I
IN
I
SENSE
I
MODE
t
AP
t
JITTER
CMRR
The
●
denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T
A
= 25°C. (Note 4)
PARAMETER
Analog Input Range (A
IN+
– A
IN–
)
Analog Input Common Mode (A
IN+
+ A
IN–
)/2
Analog Input Leakage Current
SENSE Input Leakage
MODE Pin Pull-Down Current to GND
Sample and Hold Acquisition Delay Time
Sample and Hold Acquisition Delay Time Jitter
Analog Input Common Mode Rejection Ratio
Full Power Bandwidth
Figure 8 Test Circuit
CONDITIONS
3.1V < V
DD
< 3.5V
Differential Input Drive
Single Ended Input Drive
0 < A
IN+
, A
IN–
< V
DD
0V < SENSE < 1V
●
●
●
●
●
DY A IC ACCURACY
SYMBOL
SNR
PARAMETER
Signal-to-Noise Ratio
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)
CONDITIONS
30MHz Input (1V Range)
30MHz Input (2V Range)
70MHz Input (1V Range)
70MHz Input (2V Range)
140MHz Input (1V Range)
140MHz Input (2V Range)
250MHz Input (1V Range)
250MHz Input (2V Range)
SFDR
Spurious Free Dynamic Range
30MHz Input (1V Range)
30MHz Input (2V Range)
70MHz Input (1V Range)
70MHz Input (2V Range)
140MHz Input (1V Range)
140MHz Input (2V Range)
250MHz Input (1V Range)
250MHz Input (2V Range)
SFDR
Spurious Free Dynamic Range
4th Harmonic or Higher
30MHz Input (1V Range)
30MHz Input (2V Range)
70MHz Input (1V Range)
70MHz Input (2V Range)
140MHz Input (1V Range)
140MHz Input (2V Range)
250MHz Input (1V Range)
250MHz Input (2V Range)
S/(N+D)
Signal-to-Noise Plus
Distortion Ratio
30MHz Input (1V Range)
30MHz Input (2V Range)
70MHz Input (1V Range)
70MHz Input (2V Range)
IMD
Intermodulation Distortion
f
IN1
= 138MHz, f
IN2
= 140MHz
●
●
●
U
W U
U
MIN
1
0.5
–1
–1
TYP
±0.5
to
±1
1.6
1.6
MAX
1.9
2.1
1
1
UNITS
V
V
V
µA
µA
µA
ns
ps
RMS
dB
MHz
10
0
0.15
80
775
MIN
64.3
TYP
62.5
65.7
62.5
65.7
62.2
65.4
61.8
64.9
MAX
UNITS
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBc
71
84
84
84
84
81
81
77
77
88
88
88
88
88
88
85
85
64
62.5
65.6
62.5
65.6
81
222211f
3
LTC2222-11
I TER AL REFERE CE CHARACTERISTICS
PARAMETER
V
CM
Output Voltage
V
CM
Output Tempco
V
CM
Line Regulation
V
CM
Output Resistance
3.1V < V
DD
< 3.5V
–1mA < I
OUT
< 1mA
CONDITIONS
I
OUT
= 0
DIGITAL I PUTS A D DIGITAL OUTPUTS
SYMBOL
V
ID
V
ICM
R
IN
C
IN
V
IH
V
IL
I
IN
C
IN
LOGIC OUTPUTS
OV
DD
= 3.3V
C
OZ
I
SOURCE
I
SINK
V
OH
V
OL
OV
DD
= 2.5V
V
OH
V
OL
OV
DD
= 1.8V
V
OH
V
OL
High Level Output Voltage
Low Level Output Voltage
I
O
= –200µA
I
O
= 1.6mA
High Level Output Voltage
Low Level Output Voltage
I
O
= –200µA
I
O
= 1.6mA
Hi-Z Output Capacitance
Output Source Current
Output Sink Current
High Level Output Voltage
Low Level Output Voltage
OE = High (Note 7)
V
OUT
= 0V
V
OUT
= 3.3V
I
O
= –10µA
I
O
= –200µA
I
O
= 10µA
I
O
= 1.6mA
PARAMETER
Differential Input Voltage
Common Mode Input Voltage
Input Resistance
Input Capacitance
High Level Input Voltage
Low Level Input Voltage
Input Current
Input Capacitance
(Note 7)
V
DD
= 3.3V
V
DD
= 3.3V
V
IN
= 0V to V
DD
(Note 7)
CONDITIONS
ENCODE INPUTS (ENC
+
, ENC
–
)
The
●
denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
MIN
●
LOGIC INPUTS (OE, SHDN)
●
●
●
4
U
U
U
U
U
(Note 4)
MIN
1.575
TYP
1.600
±25
3
4
MAX
1.625
UNITS
V
ppm/°C
mV/V
Ω
TYP
MAX
UNITS
V
0.2
1.1
1.6
1.6
6
3
2
0.8
–10
3
10
2.5
Internally Set
Externally Set (Note 7)
●
V
V
kΩ
pF
V
V
µA
pF
3
50
50
●
●
pF
mA
mA
V
V
0.4
V
V
V
V
V
V
3.1
3.295
3.29
0.005
0.09
2.49
0.09
1.79
0.09
222211f
LTC2222-11
The
●
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 8)
SYMBOL
V
DD
OV
DD
I
VDD
P
DISS
P
SHDN
P
NAP
PARAMETER
Analog Supply Voltage
Output Supply Voltage
Analog Supply Current
Power Dissipation
Shutdown Power
Nap Mode Power
SHDN = High, OE = High, No CLK
SHDN = High, OE = Low, No CLK
CONDITIONS
●
●
●
●
POWER REQUIRE E TS
The
●
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 4)
SYMBOL
f
S
t
L
t
H
t
AP
t
OE
t
D
t
C
Pipeline Latency
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.
PARAMETER
Sampling Frequency
ENC Low Time
ENC High Time
Sample-and-Hold Aperture Delay
Output Enable Delay
ENC to DATA Delay
ENC to CLOCKOUT Delay
DATA to CLOCKOUT Skew
(Note 7)
(Note 7)
(Note 7)
(t
C
- t
D
) (Note 7)
●
●
●
●
TI I G CHARACTERISTICS
U W
MIN
3.1
0.5
TYP
3.3
3.3
144
475
2
35
MAX
3.5
3.6
162
535
UNITS
V
V
mA
mW
mW
mW
UW
CONDITIONS
●
MIN
1
4.5
3
4.5
3
●
●
●
●
TYP
4.76
4.76
4.76
4.76
0
5
MAX
105
500
500
500
500
10
4
4
0.6
UNITS
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
Cycles
Duty Cycle Stabilizer Off
Duty Cycle Stabilizer On
Duty Cycle Stabilizer Off
Duty Cycle Stabilizer On
1.3
1.3
–0.6
2.1
2.1
0
5
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.
222211f
5
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