16-bit A/D converters designed for digitizing high frequen-
cy, wide dynamic range signals with input frequencies up
to 380MHz. The input range of the ADC can be optimized
with the PGA front end.
The LTC2203/LTC2202 are perfect for demanding app-
lications, with AC performance that includes 81.6dB
SNR and 100dB spurious free dynamic range (SFDR).
Maximum DC specs include ±4LSB INL, ±1LSB DNL (no
missing codes).
A separate output power supply allows the CMOS output
swing to range from 0.5V to 3.6V.
A single-ended CLK input controls converter operation. An
optional clock duty cycle stabilizer allows high performance
at full speed with a wide range of clock duty cycles.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 4843302, 6949965B1.
n
Sample Rate: 25Msps/10Msps
81.6dB SNR and 100dB SFDR (2.5V Range)
SFDR 90dB at 70MHz (1.667V
P-P
Input Range)
PGA Front End (2.5V
P-P
or 1.667V
P-P
Input Range)
380MHz Full Power Bandwidth S/H
Optional Internal Dither
Optional Data Output Randomizer
Single 3.3V Supply
Power Dissipation: 220mW/140mW
Clock Duty Cycle Stabilizer
Out-of-Range Indicator
Pin Compatible Family
25Msps: LTC2203 (16-Bit)
10Msps: LTC2202 (16-Bit)
48-Pin (7mm
×
7mm) QFN Package
APPLICATIONS
n
n
n
n
n
n
Telecommunications
Receivers
Cellular Base Stations
Spectrum Analysis
Imaging Systems
ATE
TYPICAL APPLICATION
LTC2203: 128K Point FFT,
f
IN
= 5.1MHz, –1dBFS, PGA = 0
3.3V
SENSE
V
CM
2.2μF
A
IN +
ANALOG
INPUT
A
IN –
1.25V
COMMON MODE
BIAS VOLTAGE
INTERNAL ADC
REFERENCE
GENERATOR
OV
DD
0.5V TO 3.6V
+
S/H
AMP
–
16-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC AND
SHIFT REGISTER
OUTPUT
DRIVERS
OF
CLKOUT+
CLKOUT–
D15
•
•
•
D0
OGND
CMOS
OUTPUTS
CLOCK/DUTY
CYCLE
CONTROL
V
DD
GND
1μF
1μF
3.3V
1μF
AMPLITUDE (dBFS)
1μF
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
0
2
8
4
6
FREQUENCY(MHz)
10
12
22032 TA02
CLK
PGA
SHDN
DITH
MODE
OE
RAND
22032 TA01
ADC CONTROL INPUTS
22032fd
1
LTC2203/LTC2202
ABSOLUTE MAXIMUM RATINGS
OV
DD
= V
DD
(Notes 1 and 2)
TOP VIEW
PIN CONFIGURATION
48 GND
47 PGA
46 RAND
45 MODE
44
OE
43 OF
42 D15
41 D14
40 D13
39 D12
38 OGND
37 OV
DD
SENSE 1
V
CM
2
V
DD
3
V
DD
4
GND 5
A
IN+
6
A
IN–
7
GND 8
GND 9
CLK 10
GND 11
V
DD
12
49
36 OV
DD
35 D11
34 D10
33 D9
32 D8
31 OGND
30 CLKOUT
+
29 CLKOUT
–
28 D7
27 D6
26 D5
25 OV
DD
UK PACKAGE
48-LEAD (7mm 7mm) PLASTIC QFN
EXPOSED PAD IS GND (PIN 49)
MUST BE SOLDERED TO PCB BOARD
T
JMAX
= 150°C,
θ
JA
= 29°C/W
Supply Voltage (V
DD
) .................................. –0.3V to 4V
Digital Output Supply Voltage (OV
DD
) ......... –0.3V to 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 ............................................2000mW
Operating Temperature Range
LTC2203C/LTC2202C ............................. 0°C to 70°C
LTC2203I/LTC2202I ............................ –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
ORDER INFORMATION
LEAD FREE FINISH
LTC2203CUK#PBF
LTC2202CUK#PBF
LTC2203IUK#PBF
LTC2202IUK#PBF
LEAD BASED FINISH
LTC2203CUK
LTC2202CUK
LTC2203IUK
LTC2202IUK
TAPE AND REEL
LTC2203CUK#TRPBF
LTC2202CUK#TRPBF
LTC2203IUK#TRPBF
LTC2202IUK#TRPBF
TAPE AND REEL
LTC2203CUK#TR
LTC2202CUK#TR
LTC2203IUK#TR
LTC2202IUK#TR
PART MARKING*
LTC2203UK
LTC2202UK
LTC2203UK
LTC2202UK
PART MARKING*
LTC2203UK
LTC2202UK
LTC2203UK
LTC2202UK
PACKAGE DESCRIPTION
48-Lead (7mm
×
7mm) Plastic QFN
48-Lead (7mm
×
7mm) Plastic QFN
48-Lead (7mm
×
7mm) Plastic QFN
48-Lead (7mm
×
7mm) Plastic QFN
PACKAGE DESCRIPTION
48-Lead (7mm
×
7mm) Plastic QFN
48-Lead (7mm
×
7mm) Plastic QFN
48-Lead (7mm
×
7mm) Plastic QFN
48-Lead (7mm
×
7mm) Plastic QFN
TEMPERATURE RANGE
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
TEMPERATURE RANGE
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
V
DD
13
V
DD
14
GND 15
SHDN 16
DITH 17
D0 18
D1 19
D2 20
D3 21
D4 22
OGND 23
OV
DD
24
22032fd
2
LTC2203/LTC2202
CONVERTER CHARACTERISTICS
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
CONDITIONS
Differential Analog Input (Note 5) T
A
= 25°C
Differential Analog Input (Note 5)
Differential Analog Input
(Note 6)
External Reference
Internal Reference
External Reference
External Reference (2.5V Range, PGA = 0)
l
l
l
l
PARAMETER
Resolution (No missing codes)
Integral Linearity Error
Integral Linearity Error
Differential Linearity Error
Offset Error
Offset Drift
Gain Error
Full-Scale Drift
Transition Noise
MIN
16
TYP
±1.2
±1.5
±0.3
±2
±10
±0.2
±30
±15
1.92
MAX
±4.0
±4.5
±1
±10
±1.5
UNITS
LSB
LSB
LSB
mV
μV/°C
%FS
ppm/°C
ppm/°C
LSB
RMS
The
l
denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T
A
= 25°C. (Note 4)
SYMBOL
V
IN
V
IN, CM
I
IN
I
SENSE
I
MODE
I
OE
C
IN
t
AP
t
JITTER
CMRR
BW-3dB
PARAMETER
Analog Input Range (A
IN+
–
A
IN–
)
Analog Input Common Mode
Analog Input Leakage Current
SENSE Input Leakage Current
MODE Pin Pull-Down Current to GND
OE
Pin Pull-Down Current to GND
Analog Input Capacitance
Sample-and-Hold
Acquisition Delay Time
Sample-and-Hold
Acquisition Delay Time Jitter
Analog Input
Common Mode Rejection Ratio
Full Power Bandwidth
1V < (A
IN+
= A
IN–
) <1.5V
Rs < 20Ω
Sample Mode CLK = 0
Hold Mode CLK = 0
CONDITIONS
3.135V ≤ V
DD
≤ 3.465V
Differential Input (Note 7)
0V ≤ A
IN+
,
A
IN–
≤ V
DD
(Note 9)
0V ≤ SENSE ≤ V
DD
(Note 10)
l
l
l
ANALOG INPUT
MIN
1
–1
–3
TYP
1.667 or 2.5
1.25
MAX
1.5
1
3
UNITS
V
P-P
V
μA
μA
μA
μA
pF
pF
ns
f
SRMS
dB
MHz
10
10
10.5
1.4
0.9
200
80
380
DYNAMIC ACCURACY
SYMBOL
SNR
PARAMETER
Signal-to-Noise Ratio
The
l
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
1MHz Input (2.25V Range, PGA = 0)
1MHz Input (1.667V Range, PGA = 1)
5MHz Input (2.5V Range, PGA = 0)
5MHz Input (1.667V Range, PGA = 1)
12.5MHz Input (2.5V Range, PGA = 0)
12.5MHz Input (1.667V Range, PGA = 1)
30MHz Input (2.5V Range, PGA = 0)
30MHz Input (1.667V Range, PGA = 1)
70MHz Input (2.5V Range, PGA = 0)
70MHz Input (1.667V Range, PGA =1 )
l
l
LTC2203
MIN
TYP
MAX
81.6
79.4
80
81.6
79.4
81.4
79.3
77.5
80.8
78.9
78.3
77.2
MIN
LTC2202
TYP
MAX
81.6
79.4
UNITS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
80
81.6
79.4
81.4
79.3
77.5
80.8
78.9
78.3
77.2
22032fd
3
LTC2203/LTC2202
DYNAMIC ACCURACY
SYMBOL
SFDR
PARAMETER
Spurious Free
Dynamic Range
2
nd
or 3
rd
Harmonic
The
l
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
1MHz Input (2.5V Range, PGA = 0)
1MHz Input (1.667V Range, PGA = 1)
5MHz Input (2.5V Range, PGA = 0)
5MHz Input (2.5V Range, PGA = 0)
5MHz Input (1.667V Range, PGA = 1)
12.5MHz Input (2.5V Range, PGA = 0)
12.5MHz Input (1.667V Range, PGA = 1)
30MHz Input (2.5V Range, PGA = 0)
30MHz Input (1.667V Range, PGA = 1)
70MHz Input (2.5V Range, PGA = 0)
70MHz Input (1.667V Range, PGA = 1)
SFDR
Spurious Free
Dynamic Range
4th Harmonic or Higher
1MHz Input (2.5V Range, PGA = 0)
1MHz Input (1.667V Range, PGA = 1)
5MHz Input (2.5V Range, PGA = 0)
5MHz Input (1.667V Range, PGA = 1)
12.5MHz Input (2.5V Range, PGA = 0)
12.5MHz Input (1.667V Range, PGA = 1)
30MHz Input (2.5V Range, PGA = 0)
30MHz Input (1.667V Range, PGA = 1)
70MHz Input (2.5V Range, PGA = 0)
70MHz Input (1.667V Range, PGA = 1)
S/(N+D)
Signal-to-Noise
Plus Distortion Ratio
1MHz Input (2.5V Range, PGA = 0)
1MHz Input (1.667V Range, PGA = 1)
5MHz Input (2.5V Range, PGA = 0)
5MHz Input (1.667V Range, PGA = 1)
12.5MHz Input (2.5V Range, PGA = 0)
12.5MHz Input (1.667V Range, PGA = 1)
30MHz Input (2.5V Range, PGA = 0)
30MHz Input (1.667V Range, PGA = 1)
70MHz Input (2.5V Range, PGA = 0)
70MHz Input (1.667V Range, PGA = 1)
SFDR
Spurious Free
Dynamic Range
at –25dBFS
Dither “OFF”
1MHz Input (2.5V Range, PGA = 0)
1MHz Input (1.667V Range, PGA = 1)
5MHz Input (2.5V Range, PGA = 0)
5MHz Input (1.667V Range, PGA = 1)
12.5MHz Input (2.5V Range, PGA = 0)
12.5MHz Input (1.667V Range, PGA = 1)
30MHz Input (2.5V Range, PGA = 0)
30MHz Input (1.667V Range, PGA = 1)
70MHz Input (2.5V Range, PGA = 0)
70MHz Input (1.667V Range, PGA = 1)
l
l
l
l
l
l
LTC2203
MIN
TYP
MAX
100
100
85
87
100
100
100
95
100
85
90
95
85
90
100
100
90
100
100
100
100
90
100
100
90
90
81.5
79.3
79.7
81.5
79.3
81.3
79.2
77.2
80.6
78.6
78.1
77
105
105
105
105
105
105
105
105
100
100
MIN
LTC2202
TYP
MAX
100
100
UNITS
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
85
87
100
100
100
95
100
85
90
95
85
90
100
100
90
100
100
100
100
90
100
100
90
90
81.5
79.3
79.7
81.5
79.3
81.3
79.2
77.2
80.6
78.6
78.1
77
105
105
105
105
105
105
105
105
100
100
22032fd
4
LTC2203/LTC2202
DYNAMIC ACCURACY
SYMBOL
SFDR
PARAMETER
Spurious Free
Dynamic Range
at –25dBFS
Dither “ON”
The
l
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
1MHz Input (2.5V Range, PGA = 0)
1MHz Input (1.667V Range, PGA = 1)
5MHz Input (2.5V Range, PGA = 0)
5MHz Input (1.667V Range, PGA = 1)
12.5MHz Input (2.5V Range, PGA = 0)
12.5MHz Input (1.667V Range, PGA = 1)
30MHz Input (2.5V Range, PGA = 0)
30MHz Input (1.667V Range, PGA = 1)
70MHz Input (2.5V Range, PGA = 0)
70MHz Input (1.667V Range, PGA = 1)
l
LTC2203
MIN
TYP
MAX
115
115
100
115
115
115
115
115
115
110
110
MIN
LTC2202
TYP
MAX
115
115
UNITS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
100
115
115
115
115
115
115
110
110
The
l
denotes the specifications which apply over
the full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
PARAMETER
V
CM
Output Voltage
V
CM
Output Tempco
V
CM
Line Regulation
V
CM
Output Resistance
CONDITIONS
I
OUT
= 0
I
OUT
= 0
3.135V ≤ V
DD
≤ 3.465V
1mA ≤ | I
OUT
| ≤ 1mA
MIN
1.15
TYP
1.25
±40
1
2
MAX
1.35
UNITS
V
ppm/°C
COMMON MODE BIAS CHARACTERISTICS
mV/ V
Ω
DIGITAL INPUTS AND DIGITAL OUTPUTS
SYMBOL
V
IH
V
IL
I
IN
C
IN
LOGIC OUTPUTS
OV
DD
= 3.3V
V
OH
V
OL
I
SOURCE
I
SINK
OV
DD
= 2.5V
V
OH
V
OL
OV
DD
= 1.8V
V
OH
V
OL
High Level Output Voltage
Low Level Output Voltage
V
DD
= 3.3V
V
DD
= 3.3V
High Level Output Voltage
Low Level Output Voltage
V
DD
= 3.3V
V
DD
= 3.3V
High Level Output Voltage
Low Level Output Voltage
Output Source Current
Output Sink Current
V
DD
= 3.3V
V
DD
= 3.3V
V
OUT
= 0V
V
OUT
= 3.3V
PARAMETER
High Level Input Voltage
Low Level Input Voltage
Digital Input Current
Digital Input Capacitance
CONDITIONS
V
DD
= 3.3V
V
DD
= 3.3V
V
IN
= 0V to V
DD
(Note 7)
LOGIC INPUTS (CLK,
OE,
DITH, PGA, SHDN, RAND)
The
l
denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
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