FEATURES
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LTC2207/LTC2206
16-Bit, 105Msps/80Msps
ADCs
DESCRIPTIO
The LTC
®
2207/LTC2206 are 105Msps/80Msps, sampling
16-bit A/D converters designed for digitizing high fre-
quency, wide dynamic range signals up to input frequencies
of 700MHz. The input range of the ADC can be optimized
with the PGA front end.
The LTC2207/LTC2206 are perfect for demanding commu-
nications applications, with AC performance that includes
78.2dB Noise Floor and 100dB spurious free dynamic range
(SFDR). Ultralow jitter of 80fs
RMS
allows undersampling of
high input frequencies with excellent noise performance.
Maximum DC specs include ±4LSB INL, ±1LSB DNL (no
missing codes) over temperature.
A separate output power supply allows the CMOS output
swing to range from 0.5V to 3.6V.
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 al-
lows 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. Patents Pending.
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Sample Rate: 105Msps/80Msps
78.2dBFS Noise Floor
100dB SFDR
SFDR >82dB at 250MHz (1.5V
P-P
Input Range)
PGA Front End (2.25V
P-P
or 1.5V
P-P
Input Range)
700MHz Full Power Bandwidth S/H
Optional Internal Dither
Optional Data Output Randomizer
Single 3.3V Supply
Power Dissipation: 900mW/725mW
Optional Clock Duty Cycle Stabilizer
Out-of-Range Indicator
Pin Compatible Family
105Msps: LTC2207 (16-Bit), LTC2207-14 (14-Bit)
80Msps: LTC2206 (16-Bit), LTC2206-14 (14-Bit)
65Msps: LTC2205 (16-Bit), LTC2205-14 (14-Bit)
40Msps: LTC2204 (16-Bit)
25Msps: LTC2203 (16-Bit) Single-Ended Clock
10Msps: LTC2202 (16-Bit) Single-Ended Clock
48-Pin 7mm
×
7mm QFN Package
APPLICATIO S
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Telecommunications
Receivers
Cellular Base Stations
Spectrum Analysis
Imaging Systems
ATE
TYPICAL APPLICATIO
3.3V
SENSE
V
CM
2.2µF
1.25V
COMMON MODE
BIAS VOLTAGE
INTERNAL ADC
REFERENCE
GENERATOR
OV
DD
0.5V TO 3.6V
0.1µF
OF
CLKOUT
+
CLKOUT
–
D15
•
•
•
D0
AIN
+
ANALOG
INPUT
AIN
–
+
S/H
AMP
–
CLOCK/DUTY
CYCLE
CONTROL
ENC
+
ENC
–
16-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC AND
SHIFT REGISTER
OUTPUT
DRIVERS
OGND
V
DD
GND
PGA
SHDN
DITH
MODE
OE
RAND
0.1µF
0.1µF
3.3V
0.1µF
22054 TA01
AMPLITUDE (dBFS)
ADC CONTROL INPUTS
U
U
U
LTC2207: 64K Point FFT,
f
IN
= 14.8MHz, –1dBFS,
PGA = 0, 105Msps
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
10
30
40
20
FREQUENCY (MHz)
50
22076 G05
22076fa
1
LTC2207/LTC2206
ABSOLUTE MAXIMUM RATINGS
OV
DD
= V
DD
(Notes 1, 2)
PACKAGE/ORDER INFORMATION
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
AIN+ 6
AIN
–
7
GND 8
ENC
+
9
ENC
–
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
TOP VIEW
Supply Voltage (V
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
LTC2207C/LTC2206C ............................... 0°C to 70°C
LTC2207I/LTC2206I ............................. –40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Digital Output Supply Voltage (OV
DD
) .......... –0.3V to 4V
ORDER PART NUMBER
LTC2207CUK
LTC2206CUK
LTC2207IUK
LTC2206IUK
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 factory for parts specified with wider operating temperature ranges.
*The temperature grade is identified by a label on the shipping container.
CONVERTER CHARACTERISTICS
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
PARAMETER
Integral Linearity Error
Integral Linearity Error
Differential Linearity Error
Offset Error
Offset Drift
Gain Error
Full-Scale Drift
Transition Noise
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
●
●
●
●
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*
LTC2207UK
LTC2206UK
LTC2207UK
LTC2206UK
MIN
TYP
±1.2
1.5
±0.3
±1
±10
±0.2
±30
±15
2.8
MAX
±4
±4.5
±1
±8.5
±1.5
UNITS
LSB
LSB
LSB
mV
µV/
°C
%FS
ppm/°C
ppm/°C
LSB
RMS
22076fa
2
LTC2207/LTC2206
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
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
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 10)
0V ≤ SENSE ≤ V
DD
(Note 11)
Sample Mode ENC
+
< ENC
–
Hold Mode ENC
+
> ENC
–
●
●
●
●
ANALOG INPUT
MIN
1
–1
–3
TYP
1.5 to 2.25
1.25
MAX
1.5
1
3
UNITS
V
P-P
V
µA
µA
µA
pF
pF
ns
fs
RMS
dB
MHz
10
6.7
1.8
1
80
1V < (A
IN+
= A
IN–
) <1.5V
R
S
≤ 25Ω
80
700
DYNAMIC ACCURACY
SYMBOL PARAMETER
SNR
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
5MHz Input (2.25V Range, PGA = 0)
5MHz Input (1.5V Range, PGA = 1)
15MHz Input (2.25V Range, PGA = 0),
15MHz Input (2.25V Range, PGA = 0)
15MHz Input (1.5V Range, PGA = 1)
70MHz Input (2.25V Range, PGA = 0)
70MHz Input (1.5V Range, PGA = 1)
140MHz Input (2.25V Range, PGA = 0)
140MHz Input (1.5V Range, PGA = 1),
140MHz Input (1.5V Range, PGA = 1)
170MHz Input (2.25V Range, PGA = 0)
170MHz Input (1.5V Range, PGA = 1)
73.8
73.4
●
MIN
LTC2206
TYP
77.9
75.5
MAX
MIN
LTC2207
TYP
77.9
75.5
MAX
UNITS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
76.5
76.2
77.8
77.5
75.4
77.5
75.3
76.7
74.8
74.5
76.2
75.4
100
100
76.5
76.2
77.8
77.5
75.4
77.5
75.3
●
73.8
73.4
76.7
74.8
74.5
76.2
75.4
100
100
SFDR
Spurious Free
Dynamic Range
2
nd
or 3
rd
Harmonic
5MHz Input (2.25V Range, PGA = 0)
5MHz Input (1.5V Range, PGA = 1)
15MHz Input (2.25V Range, PGA = 0),
15MHz Input (2.25V Range, PGA = 0)
15MHz Input (1.5V Range, PGA = 1)
70MHz Input (2.25V Range, PGA = 0)
70MHz Input (1.5V Range, PGA = 1)
140MHz Input (2.25V Range, PGA = 0)
140MHz Input (1.5V Range, PGA = 1),
140MHz Input (1.5V Range, PGA = 1)
170MHz Input (2.25V Range, PGA = 0)
170MHz Input (1.5V Range, PGA = 1)
84
83
●
87
86
95
95
100
90
95
85
90
89
82
86
88
87
95
95
100
90
95
●
84
83
85
90
89
82
86
22076fa
3
LTC2207/LTC2206
DYNAMIC ACCURACY
SYMBOL PARAMETER
SFDR
Spurious Free
Dynamic Range
4
th
Harmonic
or Higher
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
5MHz Input (2.25V Range, PGA = 0)
5MHz Input (1.5V Range, PGA = 1)
15MHz Input (2.25V Range, PGA = 0)
15MHz Input (1.5V Range, PGA = 1)
70MHz Input (2.25V Range, PGA = 0)
70MHz Input (1.5V Range, PGA = 1)
140MHz Input (2.25V Range, PGA = 0)
140MHz Input (1.5V Range, PGA = 1)
170MHz Input (2.25V Range, PGA = 0)
170MHz Input (1.5V Range, PGA = 1)
S/(N+D)
Signal-to-Noise
Plus Distortion Ratio
5MHz Input (2.25V Range, PGA = 0)
5MHz Input (1.5V Range, PGA = 1)
15MHz Input (2.25V Range, PGA = 0)
15MHz Input (2.25V Range, PGA = 0
15MHz Input (1.5V Range, PGA = 1)
70MHz Input (2.25V Range, PGA = 0)
70MHz Input (1.5V Range, PGA = 1)
140MHz Input (2.25V Range, PGA = 0)
140MHz Input (1.5V Range, PGA = 1)
140MHz Input (1.5V Range, PGA = 1)
170MHz Input (2.25V Range, PGA = 0)
170MHz Input (1.5V Range, PGA = 1)
73.6
73.2
●
●
●
MIN
LTC2206
TYP
100
100
MAX
MIN
LTC2207
TYP
100
100
MAX
UNITS
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
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
90
100
100
100
100
90
100
100
100
100
88
95
100
90
95
77.9
75.5
88
95
100
90
95
77.9
75.5
76.3
75.9
77.8
77.4
75.4
77.1
75.2
75.6
74.6
74.3
74.4
73.9
105
105
105
105
105
105
100
100
100
100
115
115
76.3
75.9
77.8
77.4
75.4
77.1
75.2
●
73.6
73.2
75.6
74.6
74.3
74.4
73.9
105
105
105
105
105
105
100
100
100
100
115
115
SFDR
Spurious Free
Dynamic Range
at –25dBFS
Dither “OFF”
5MHz Input (2.25V Range, PGA = 0)
5MHz Input (1.5V Range, PGA = 1)
15MHz Input (2.25V Range, PGA = 0)
15MHz Input (1.5V Range, PGA = 1)
70MHz Input (2.25V Range, PGA = 0)
70MHz Input (1.5V Range, PGA = 1)
140MHz Input (2.25V Range, PGA = 0)
140MHz Input (1.5V Range, PGA = 1)
170MHz Input (2.25V Range, PGA = 0)
170MHz Input (1.5V Range, PGA = 1)
SFDR
Spurious Free
Dynamic Range
at –25dBFS
Dither “ON”
5MHz Input (2.25V Range, PGA = 0)
5MHz Input (1.5V Range, PGA = 1)
15MHz Input (2.25V Range, PGA = 0)
15MHz Input (1.5V Range, PGA = 1)
70MHz Input (2.25V Range, PGA = 0)
70MHz Input (1.5V Range, PGA = 1)
140MHz Input (2.25V Range, PGA = 0)
140MHz Input (1.5V Range, PGA = 1)
170MHz Input (2.25V Range, PGA = 0)
170MHz Input (1.5V Range, PGA = 1)
●
100
115
115
115
115
110
110
105
105
100
115
115
115
115
110
110
105
105
22076fa
4
LTC2207/LTC2206
COMMON MODE BIAS CHARACTERISTICS
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
The
●
denotes the specifications which apply over
the full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
MIN
1.15
TYP
1.25
40
1
2
MAX
1.35
UNITS
V
ppm/°C
mV/ V
Ω
DIGITAL INPUTS AND DIGITAL OUTPUTS
SYMBOL
PARAMETER
ENCODE INPUTS (ENC
+
, ENC
–
)
V
ID
Differential Input Voltage
V
ICM
Common Mode Input Voltage
R
IN
Input Resistance
CONDITIONS
(Note 7)
Internally Set
Externally Set (Note 7)
(See Figure 2)
(Note 7)
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
●
TYP
MAX
UNITS
V
V
0.2
1.6
1.4
6
3
3.0
k
Ω
pF
V
V
µA
pF
C
IN
Input Capacitance
LOGIC INPUTS (DITH, PGA, SHDN, RAND)
V
IH
High Level Input Voltage
V
IL
Low Level Input Voltage
I
IN
Input Current
C
IN
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
●
●
●
2
0.8
±10
1.5
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
2.49
0.1
1.79
0.1
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
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)
SYMBOL PARAMETER
V
DD
P
SHDN
OV
DD
I
VDD
P
DIS
Analog Supply Voltage
Shutdown Power
Output Supply Voltage
Analog Supply Current
Power Dissipation
DC Input
DC Input
SHDN = V
DD
●
●
●
POWER REQUIREMENTS
CONDITIONS
●
MIN
3.135
0.5
LTC2206
TYP
3.3
0.2
MAX
3.465
3.6
MIN
3.135
0.5
LTC2207
TYP
3.3
0.2
MAX
3.465
3.6
UNITS
V
mW
V
mA
mW
22076fa
220
725
265
875
273
900
325
1,073
5
PCB Design
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