22323f
LTC2232/LTC2233
1
22323f
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
Sample Rate: 105Msps/80Msps
61dB SNR up to 140MHz Input
75dB SFDR up to 200MHz Input
775MHz Full Power Bandwidth S/H
Single 3.3V Supply
Low Power Dissipation: 475mW/366mW
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 x 7mm QFN Package
10-Bit,105Msps/
80Msps ADCs
The LTC
2232 and LTC2233 are 105Msps/80Msps, sam-
pling 10-bit A/D converters designed for digitizing high
frequency, wide dynamic range signals. The LTC2232/
LTC2233 are perfect for demanding communications
applications with AC performance that includes 61dB SNR
and 75dB spurious free dynamic range for signals
up to 200MHz. 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 0.8LSB INL, 0.6LSB DNL over temperature. The
transition noise is a low 0.12LSB
RMS
.
A separate output power supply allows the outputs to drive
0.5V to 3.3V logic.
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.
Wireless and Wired Broadband Communication
Cable Head-End Systems
Power Amplifier Linearization
Communications Test Equipment
+
INPUT
S/H
CORRECTION
LOGIC
OUTPUT
DRIVERS
10-BIT
PIPELINED
ADC CORE
CLOCK/DUTY
CYCLE
CONTROL
FLEXIBLE
REFERENCE
D9
D0
ENCODE INPUT
REFH
REFL
ANALOG
INPUT
22323 TA01
0.5V
TO 3.3V
OV
DD
OGND
V
DD
3.3V
INPUT FREQUENCY (MHz)
0
90
85
80
75
70
65
60
55
50
100
200
300
400
22323 TA01b
500
600
SFDR (dBFS)
4th OR HIGHER
2nd OR 3rd
SFDR vs Input Frequency
LTC2232/LTC2233
2
22323f
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
LTC2232C, LTC2233C ............................. 0C to 70C
LTC2232I, LTC2233I ...........................40C to 85C
Storage Temperature Range ..................65C to 125C
ORDER PART
NUMBER
UK PART
MARKING*
T
JMAX
= 125C,
JA
= 29C/W
LTC2232UK
LTC2232UK
LTC2233UK
LTC2233UK
LTC2232CUK
LTC2232IUK
LTC2233CUK
LTC2233IUK
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
= 25C. (Note 4)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Resolution (No Missing Codes)
10
Bits
Integral Linearity Error (Note 5)
Differential Analog Input
0.8
0.15
0.8
LSB
Differential Linearity Error
Differential Analog Input
0.6
0.1
0.6
LSB
Integral Linearity Error (Note 5)
Single-Ended Analog Input
0.5
LSB
Differential Linearity Error
Single-Ended Analog Input
0.1
LSB
Offset Error (Note 6)
37
5
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
0.12
LSB
RMS
*The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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 D7
35 D6
34 D5
33 OV
DD
32 OGND
31 D4
30 D3
29 D2
28 OV
DD
27 OGND
26 D1
25 D0
49
48 GND
47 V
DD
46 V
DD
45 GND
44 V
CM
43 SENSE
42 MODE
41 OF
40 D9
39 D8
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
NC 24
LTC2232/LTC2233
3
22323f
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
Differential Input
1
1.6
1.9
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
Full Power Bandwidth
Figure 8 Test Circuit
775
MHz
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
LTC2232
LTC2233
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
SNR
Signal-to-Noise Ratio
30MHz Input (1V Range)
59.8
59.9
dB
30MHz Input (2V Range)
60.4
61.3
60.4
61.3
dB
70MHz Input (1V Range)
59.8
59.8
dB
70MHz Input (2V Range)
61.2
61.3
dB
140MHz Input (1V Range)
59.8
59.8
dB
140MHz Input (2V Range)
61.2
61.2
dB
250MHz Input (1V Range)
59.6
59.7
dB
250MHz Input (2V Range)
61.1
61.2
dB
SFDR
Spurious Free Dynamic Range
30MHz Input (1V Range)
80
80
dB
30MHz Input (2V Range)
69
78
69
78
dB
70MHz Input (1V Range)
80
80
dB
70MHz Input (2V Range)
78
78
dB
140MHz Input (1V Range)
78
78
dB
140MHz Input (2V Range)
78
78
dB
250MHz Input (1V Range)
71
73
dB
250MHz Input (2V Range)
70
72
dB
SFDR
Spurious Free Dynamic Range
30MHz Input (1V Range)
86
86
dB
4th Harmonic or Higher
30MHz Input (2V Range)
86
86
dB
70MHz Input (1V Range)
86
86
dB
70MHz Input (2V Range)
86
86
dB
140MHz Input (1V Range)
86
86
dB
140MHz Input (2V Range)
86
86
dB
250MHz Input (1V Range)
86
86
dB
250MHz Input (2V Range)
86
86
dB
S/(N+D)
Signal-to-Noise Plus
30MHz Input (1V Range)
59.8
59.9
dB
Distortion Ratio
30MHz Input (2V Range)
60.2
61.3
60.2
61.3
dB
70MHz Input (1V Range)
59.8
59.8
dB
70MHz Input (2V Range)
61.2
61.2
dB
IMD
Intermodulation Distortion
f
IN1
= 138MHz, f
IN2
= 140MHz
81
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
= 25C. (Note 4)
The
denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25C. A
IN
= 1dBFS. (Note 4)
LTC2232/LTC2233
4
22323f
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
= 25C. (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
1.570
1.600
1.630
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
= 10A
3.295
V
I
O
= 200A
3.1
3.29
V
V
OL
Low Level Output Voltage
I
O
= 10A
0.005
V
I
O
= 1.6mA
0.09
0.4
V
OV
DD
= 2.5V
V
OH
High Level Output Voltage
I
O
= 200A
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
= 200A
1.79
V
V
OL
Low Level Output Voltage
I
O
= 1.6mA
0.09
V
LTC2232/LTC2233
5
22323f
LTC2232
LTC2233
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
V
DD
Analog Supply Voltage
3.1
3.3
3.5
3.1
3.3
3.5
V
OV
DD
Output Supply Voltage
0.5
3.3
3.6
0.5
3.3
3.6
V
I
VDD
Analog Supply Current
144
162
111
123
mA
P
DISS
Power Dissipation
475
535
366
406
mW
P
SHDN
Shutdown Power
SHDN = H, OE = H, No CLK
2
2
mW
P
NAP
Nap Mode Power
SHDN = H, OE = L, No CLK
35
35
mW
LTC2232
LTC2233
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
f
S
Sampling Frequency
1
105
1
80
MHz
t
L
ENC Low Time (Note 8)
Duty Cycle Stabilizer Off
4.5
4.76
500
5.9
6.25
500
ns
Duty Cycle Stabilizer On
3
4.76
500
3
6.25
500
ns
t
H
ENC High Time (Note 8)
Duty Cycle Stabilizer Off
4.5
4.76
500
5.9
6.25
500
ns
Duty Cycle Stabilizer On
3
4.76
500
3
6.25
500
ns
t
AP
Sample-and-Hold Aperture Delay
0
0
ns
t
D
ENC to DATA Delay
(Note 7)
1.3
2.1
4
1.3
2.1
4
ns
t
C
ENC to CLOCKOUT Delay
(Note 7)
1.3
2.1
4
1.3
2.1
4
ns
DATA to CLOCKOUT Skew
(t
C
- t
D
) (Note 7)
0.6
0
0.6
0.6
0
0.6
ns
t
OE
Output Enable Delay
(Note 7)
5
10
5
10
ns
Pipeline Latency
5
5
Cycles
POWER REQUIRE E TS
W
U
The
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25C. (Note 9)
TI I G CHARACTERISTICS
U
W
The
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25C. (Note 4)
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, f
SAMPLE
= 105MHz (LTC2232) or 80MHz (LTC2233),
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
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 00 0000 0000 and 11 1111 1111 in 2's
complement output mode.
Note 7: Guaranteed by design, not subject to test.
Note 8: Recommended operating conditions.
Note 9: V
DD
= 3.3V, f
SAMPLE
= 105MHz (LTC2232) or 80MHz (LTC2233),
differential ENC
+
/ENC
= 2V
P-P
sine wave, input range = 1V
P-P
with differential
drive.
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