LTC2203/LTC2202
16-Bit, 25Msps/10Msps ADCs
U
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
FEATURES
■
■
■
■
■
■
■
■
■
■
■
■
DESCRIPTIO
■
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
The LTC
®
2203/LTC2202 are 25Msps/10Msps, sampling
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 ap-
plications, 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.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All
other trademarks are the property of their respective owners. Protected by U.S. Patents
including 4843302 and 6949965B1
APPLICATIO S
■
■
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■
■
■
Telecommunications
Receivers
Cellular Base Stations
Spectrum Analysis
Imaging Systems
ATE
TYPICAL APPLICATIO
+
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)
CLK
PGA
SHDN
ADC CONTROL INPUTS
U
U
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 GO7
DITH
MODE
OE
RAND
22032 TA01
22032fb
1
LTC2203/LTC2202
ABSOLUTE
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
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
OV
DD
= V
DD
(Notes 1 and 2)
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 125°C
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
= 125°C,
θ
JA
= 29°C/W
T
JMAX
= 150°C, OPTION AVAILABLE, CONSULT FACTORY
ORDER PART
NUMBER
LTC2203CUK
LTC2202CUK
LTC2203IUK
LTC2202IUK
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/
*The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
CO VERTER CHARACTERISTICS
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
The
●
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)
MIN
16
●
●
●
●
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
UK PART*
MARKING
LTC2203UK
LTC2202UK
LTC2203UK
LTC2202UK
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
22032fb
2
U
W
U
U
W W
W
U
LTC2203/LTC2202
A ALOG I PUT
The
●
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
⎯
O
⎯
E
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
⎯
O
⎯
E 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
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)
MIN
●
●
●
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
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 )
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)
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)
LTC2203
MIN
TYP
MAX
81.6
79.4
80.0
81.6
79.4
81.4
79.3
80.8
77.5
78.9
78.3
77.2
100
100
85
100
90
100
100
95
100
90
85
95
85
90
100
100
90
100
100
100
100
100
90
100
90
90
LTC2202
MIN
TYP MAX
81.6
79.4
80.0
81.6
79.4
81.4
79.3
80.8
77.5
78.9
78.3
77.2
100
100
85
100
90
100
100
95
100
90
85
95
85
90
100
100
90
100
100
100
100
100
90
100
90
90
UNITS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
22032fb
SFDR
Spurious Free
Dynamic Range
2
nd
or 3
rd
Harmonic
SFDR
Spurious Free
Dynamic Range
4
th
Harmonic
or Higher
U
W U
U
1
–1
–3
Sample Mode CLK = 0
Hold Mode CLK = 0
TYP
MAX
1.667 or 2.5
1.25
1.5
1
3
10
10
10.5
1.4
0.9
200
UNITS
V
P-P
V
μA
μA
μA
μA
pF
pF
ns
fs RMS
dB
MHz
1V < (A
IN+
= A
IN–
) <1.5V
Rs < 20Ω
80
380
●
●
●
●
●
●
3
LTC2203/LTC2202
DY A IC ACCURACY
SYMBOL
S/(N+D)
PARAMETER
Signal-to-Noise
Plus Distortion Ratio
The
●
denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C. A
IN
= –1dBFS unless otherwise noted. (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)
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)
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)
LTC2203
MIN
TYP
MAX
81.5
79.3
●
SFDR
SFDR
CO
operating temperature range, otherwise specifications are at T = 25°C. (Note 4) denotes the specifications which apply over
O
ODE BIAS CHARACTERISTICS
The
●
the full
A
PARAMETER
V
CM
Output Voltage
V
CM
Output Tempco
V
CM
Line Regulation
V
CM
Output Resistance
4
U U UU
U
UU
W U
LTC2202
MIN
TYP
MAX
81.5
79.3
79.7
81.5
79.3
81.3
79.2
80.6
78.6
78.1
77
105
105
105
105
105
105
105
105
100
100
115
115
115
115
115
115
115
115
110
110
UNITS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
79.7
●
77.2
Spurious Free
Dynamic Range
at –25dBFS
Dither “OFF”
Spurious Free
Dynamic Range
at –25dBFS
Dither “ON”
81.5
79.3
81.3
79.2
80.6
78.6
78.1
77
105
105
105
105
105
105
105
105
100
100
115
115
115
115
115
115
115
115
110
110
77.2
●
100
100
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
mV/ V
Ω
22032fb
LTC2203/LTC2202
DIGITAL I PUTS A D DIGITAL OUTPUTS
SYMBOL
PARAMETER
LOGIC INPUTS (CLK,
⎯
O
⎯
E, DITH, PGA, SHDN, RAND)
V
IH
High Level Input Voltage
V
IL
Low Level Input Voltage
I
IN
Digital Input Current
C
IN
Digital Input Capacitance
LOGIC OUTPUTS
OV
DD
= 3.3V
V
OH
High Level Output Voltage
V
OL
I
SOURCE
I
SINK
OV
DD
= 2.5V
V
OH
V
OL
OV
DD
= 1.8V
V
OH
V
OL
Low Level Output Voltage
Output Source Current
Output Sink Current
High Level Output Voltage
Low Level Output Voltage
High Level Output Voltage
Low Level Output Voltage
CONDITIONS
V
DD
= 3.3V
V
DD
= 3.3V
V
IN
= 0V to V
DD
(Note 7)
●
●
●
The
●
denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
MIN
2
0.8
±10
1.5
TYP
MAX
UNITS
V
V
μA
pF
POWER REQUIRE E TS
SYMBOL
V
DD
P
SHDN
OV
DD
I
VDD
P
DIS
PARAMETER
Analog Supply Voltage
Shutdown Power
Output Supply Voltage
Analog Supply Current
Power Dissipation
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
●
U W
U
U
V
DD
= 3.3V
V
DD
= 3.3V
V
OUT
= 0V
V
OUT
= 3.3V
V
DD
= 3.3V
V
DD
= 3.3V
V
DD
= 3.3V
V
DD
= 3.3V
I
O
= –10μA
I
O
= –200μA
●
I
O
= 160μA
I
O
= 1.6mA
●
3.1
3.299
3.29
0.01
0.10
–50
50
0.4
V
V
V
V
mA
mA
V
V
V
V
I
O
= –200μA
I
O
= 1.60mA
I
O
= –200μA
I
O
= 1.60mA
2.49
0.1
1.79
0.1
MIN
3.135
0.5
LTC2203
TYP
3.3
2
66
220
MAX
3.465
3.6
80
264
MIN
3.135
0.5
LTC2202
TYP
3.3
2
42
140
MAX
3.465
3.6
50
165
UNITS
V
mW
V
mA
mW
SHDN = V
DD
, CLK = V
DD
●
●
●
22032fb
5
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