LTM2220-AA
12-Bit, 170Msps ADC
FEATURES
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DESCRIPTION
The LTM
®
2220-AA is a 170Msps sampling 12-bit A/D
converter designed for digitizing high frequency, wide
dynamic range signals. The LTM2220-AA is perfect for
demanding communications applications with AC per-
formance that includes 66.2dB SNR and 84dB spurious
free dynamic range.
DC specs include ±0.5LSB INL (typ), ±0.3LSB DNL (typ)
and no missing codes over temperature.
The CLK+ and CLK- inputs may be driven differentially or
single ended with a sine wave, PECL, TTL or CMOS inputs.
A clock duty cycle stabilizer allows high performance at
full speed for a wide range of clock duty cycles.
The LTM2220-AA is pin compatible with the AD9430 when
used with LVDS outputs, 2’s complement output format
and the 1.536V
PP
input range.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Pin Compatible with the AD9430
Sample Rate: 170Msps
66.2dB SNR, 84dB SFDR
No Missing Codes
Single 3.3V supply
Power Dissipation: 1050mW
LVDS Digital Outputs
1.536V
PP
Input Range
Clock Duty Cycle Stabilizer
Out-of-Range Indicator
Data Ready Output Clock
Integrated Bypass Capacitors
100-Pin SiPLGA Package
APPLICATIONS
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Wireless and Wired Broadband Communication
Spectral Analysis
TYPICAL APPLICATION
3.3V
AV
DD
REFERENCE
3.3V
DRVDD
+
ANALOG
INPUT
INPUT
S/H
–
12-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC
OUTPUT
DRIVERS
D11
•
•
•
D0
LVDS
OUTPUTS
DRGND
CLOCK/DUTY
CYCLE
CONTROL
AGND
CLOCK
INPUT
2220 TA01
2220aaf
1
LTM2220-AA
ABSOLUTE MAXIMUM RATINGS
AVDD = DRVDD (Notes 1, 2)
Supply Voltage (AVDD, DRVDD) .................................4V
Analog Input Voltage (Note 3) .... -0.3V to (AVDD + 0.3V)
Digital Input Voltage................... -0.3V to (AVDD + 0.3V)
Digital Output Voltage ............. -0.3V to (DRVDD + 0.3V)
Power Dissipation ............................................ 1500mW
Operating Temperature Range ..................-40°C to 85°C
Storage Temperature Range....................-65°C to 125°C
PACKAGE/ORDER INFORMATION
TOP VIEW
DRGND
DRVDD
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AVDD
AVDD
AVDD
AVDD
AVDD
AVDD
AVDD
D11+
D11–
D10+
D10–
OR+
OR–
D9+
D9–
75 DRVDD
74 DRGND
73 D8+
72 D8–
71 D7+
70 D7–
69 D6+
68 D6–
AGND
AGND
67 DRGND
66 D5+
65 D5–
64 DCO+
63 DCO–
62 DRVDD
61 DRGND
AGND
60 D4+
AGND
59 D4–
58 D3+
57 D3–
56 D2+
55 D2–
54 DRVDD
53 DRGND
52 D1+
51 D1–
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
DRVDD
DRGND
AGND
AVDD
AVDD
AVDD
AGND
AGND
AGND
NC
AVDD
AGND
CLK+
CLK–
AGND
AVDD
AVDD
AGND
NC
NC
NC
NC
NC
D0–
D0+
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76
NC
NC
NC
AGND
NC
NC
NC
AVDD
AGND
1
2
3
4
5
6
7
8
9
NC 10
NC 11
AGND 12
AGND 13
AVDD 14
AVDD 15
AGND 16
AGND 17
AVDD 18
AVDD 19
AGND 20
V
IN
+
21
V
IN–
22
AGND 23
AVDD 24
AGND 25
SiPLGA PACKAGE
100-LEAD (16mm
×
16mm)
T
JMAX
= 125°C,
θ
JA
= 20°C/W
EXPOSED PADS ARE AGND
ORDER PART NUMBER
LTM2220IV-AA#PBF
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LGA PART MARKING
LTM2220V-AA
2220aaf
2
LTM2220-AA
CONVERTER CHARACTERISTICS
PARAMETER
Resolution (No Missing Codes)
Integral Linearity Error
Differential Linearity Error
Offset Error
Gain Error
(Note 6)
(Note 5)
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
CONDITIONS
●
●
●
MIN
12
–1.5
–1
–35
TYP
±0.5
±0.3
±3
±0.5
MAX
1.5
1
35
UNITS
Bits
LSB
LSB
mV
%FS
ANALOG INPUTS
The
●
denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T
A
= 25°C. (Note 4)
PARAMETER
Differential Input Range
Common Mode Input Range
Lower –3dB Frequency
Upper –3dB Frequency
Sample and Hold Jitter
R
S
= 75Ω
SYMBOL
V
IN
V
IN, CM
f
L
f
H
t
JITTER
CONDITIONS
V
IN+
– V
IN–
(V
IN+
+ V
IN–
)/2
●
●
MIN
0
TYP
1.536
MAX
3.6
UNITS
V
V
kHz
MHz
ps
RMS
1.6
195
0.2
DYNAMIC ACCURACY
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)
PARAMETER
Signal-to-Noise Ratio
Signal to Noise Plus Distortion Ratio
Spurious Free Dynamic Range: 2nd or
3rd Harmonic
Spurious Free Dynamic Range: 4th
Harmonic or Higher
Intermodulation Distortion
SYMBOL
SNR
SINAD
SFDR
SFDR
IMD
CONDITIONS
10MHz Input
70MHz Input
10MHz Input
70MHz Input
10MHz Input
70MHz Input
10MHz Input
70MHz Input
f
IN1
= 138MHz, f
IN2
= 140MHz
●
●
●
●
MIN
63.5
63.2
70
78
TYP
66.2
66.1
66.1
65.9
84
84
90
90
81
MAX
UNITS
dB
dB
dB
dB
dB
dB
dB
dB
dB
2220aaf
3
LTM2220-AA
DIGITAL INPUTS AND OUTPUTS
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
PARAMETER
Differential Input Voltage
Common Mode Input Voltage
Input Resistance
Input Capacitance
Differential Output Voltage
Output Common Mode Voltage
(Note 7)
100Ω Load
●
●
SYMBOL
V
ID
V
ICM
R
IN
C
IN
V
OD
V
OS
CONDITIONS
●
MIN
0.2
1.1
TYP
MAX
UNITS
V
CLOCK INPUTS (CLK+, CLK–)
Internally Set
Externally Set
1.6
1.6
6
3
247
1.125
350
1.250
454
1.375
V
V
kΩ
pF
mV
V
●
2.5
DIGITAL LOGIC OUTPUTS
POWER REQUIREMENTS
SYMBOL
AVDD
DRVDD
IAVDD
IDVDD
PDISS
PARAMETER
Analog Supply Voltage
Digital Supply Voltage
Analog Supply Current
Digital Supply Current
Power Dissipation
The
●
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 4)
CONDITIONS
(Note 8)
(Note 8)
●
●
●
●
●
MIN
3.1
3.0
TYP
3.3
3.3
264
55
1050
MAX
3.5
3.6
288
70
1182
UNITS
V
V
mA
mA
mW
TIMING CHARACTERISTICS
SYMBOL
f
S
t
L
t
H
t
AP
t
D
t
C
PARAMETER
Sampling Frequency
CLK Low Time
CLK High Time
Sample-and-Hold Aperture Delay
CLK to DATA Delay
CLK to DCO Delay
DATA to DCO Skew
Rise Time
Fall Time
Pipeline Latency
The
●
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 4)
CONDITIONS
●
MIN
1
2
2
1.5
1.5
–0.6
●
●
TYP
2.94
2.94
0
3
3
0
0.5
0.5
5
MAX
170
500
500
4.3
4.3
0.6
UNITS
MHz
ns
ns
ns
ns
ns
ns
ns
ns
Cycles
(Note 7)
(Note 7)
(Note 7)
(Note 7)
(t
C
– t
D
), (Note 7)
●
●
●
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 ground with AGND and
DRGND 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:
AVDD = DRVDD = 3.3V, f
SAMPLE
=170MHz, differential CLK+/CLK-
= 2Vpp sine wave, differential analog inputs, unless otherwise noted.
Note 5:
Integral nonlinearity is defined as the deviation of a code from a
“best fit 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 0000 0000 0000 and 1111 1111 1111.
Note 7:
Guaranteed by design, not subject to test.
Note 8:
Recommended operating conditions.
2220aaf
4
LTM2220-AA
TYPICAL PERFORMANCE CHARACTERISTICS
8192 Point FFT, f
IN
= 5MHz, –1dB,
170Msps
0
–10
–20
–30
AMPLITUDE (dB)
AMPLITUDE (dB)
–40
–50
–60
–70
–80
–90
–100
–110
0
10
20
30 40 50 60
FREQUENCY (MHz)
70
80
2220 G01
8192 Point FFT, f
IN
= 30MHz,
–1dB, 170Msps
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
0
10
20
30 40 50 60
FREQUENCY (MHz)
70
80
2220 G02
8192 Point FFT, f
IN
= 70MHz,
–1dB, 170Msps
0
–10
–20
–30
AMPLITUDE (dB)
–40
–50
–60
–70
–80
–90
–100
–110
0
10
20
30 40 50 60
FREQUENCY (MHz)
70
80
2220 G03
8192 Point FFT, f
IN
= 140MHz,
–1dB, 170Msps
0
–10
–20
–30
AMPLITUDE (dB)
ERROR (LSB)
–40
–50
–60
–70
–80
–90
–100
–110
0
10
20
30 40 50 60
FREQUENCY (MHz)
70
80
2220 G04
INL Error
1.0
0.8
0.6
0.4
0.2
0
– 0.2
– 0.4
– 0.6
– 0.8
– 1.0
0
1024
3072
2048
OUTPUT CODE
4096
2220 G05
DNL Error
1.0
0.8
0.6
0.4
ERROR (LSB)
0.2
0
– 0.2
– 0.4
– 0.6
– 0.8
– 1.0
0
1024
3072
2048
OUTPUT CODE
4096
2220 G06
2220aaf
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