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 com-
munications 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.
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.
■
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
APPLICATIONS
■
■
■
■
■
■
Telecommunications
Receivers
Cellular Base Stations
Spectrum Analysis
Imaging Systems
ATE
LTC2207: 64K Point FFT,
f
IN
= 14.8MHz, –1dBFS,
PGA = 0, 105Msps
0.5V TO 3.6V
0.1μF
OF
CLKOUT
+
CLKOUT
–
D15
•
•
•
D0
OGND
CLOCK/DUTY
CYCLE
CONTROL
ENC
+
ENC
–
PGA
SHDN
DITH
MODE
OE
RAND
V
DD
GND
0.1μF
0.1μF
3.3V
0.1μF
22076 TA01
TYPICAL APPLICATION
3.3V
SENSE
OV
DD
V
CM
2.2μF
1.25V
COMMON MODE
BIAS VOLTAGE
INTERNAL ADC
REFERENCE
GENERATOR
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
AIN
+
ANALOG
INPUT
AIN
–
+
S/H
AMP
–
16-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC AND
SHIFT REGISTER
OUTPUT
DRIVERS
AMPLITUDE (dBFS)
0
10
30
40
20
FREQUENCY (MHz)
50
22076 G05
ADC CONTROL INPUTS
22076fc
1
LTC2207/LTC2206
ABSOLUTE MAXIMUM RATINGS
OV
DD
= V
DD
(Notes 1, 2)
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
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 INFORMATION
LEAD FREE FINISH
LTC2207CUK#PBF
LTC2206CUK#PBF
LTC2207IUK#PBF
LTC2206IUK#PBF
TAPE AND REEL
LTC2207CUK#TRPBF
LTC2206CUK#TRPBF
LTC2207IUK#TRPBF
LTC2206IUK#TRPBF
PART MARKING*
LTC2207UK
LTC2206UK
LTC2207UK
LTC2206UK
PACKAGE DESCRIPTION
48-Lead (7mm
×
7mm) Plastic Plastic QFN
48-Lead (7mm
×
7mm) Plastic Plastic QFN
48-Lead (7mm
×
7mm) Plastic Plastic QFN
48-Lead (7mm
×
7mm) Plastic Plastic QFN
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.
Consult LTC Marketing for information on non-standard lead based finish parts.
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/
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
External Reference
Internal Reference
External Reference
CONDITIONS
CONVERTER CHARACTERISTICS
The
●
denotes the specifications which apply over the full operating
MIN
●
●
●
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
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
22076fc
Differential Analog Input (Note 5) T
A
= 25°C
Differential Analog Input (Note 5)
Differential Analog Input
(Note 6)
●
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
1V < (A
IN+
= A
IN–
) <1.5V
R
S
≤ 25Ω
Sample Mode ENC
+
< ENC
–
Hold Mode ENC
+
> ENC
–
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)
●
●
●
●
ANALOG INPUT
MIN
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
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
MAX
77.9
75.5
MIN
LTC2207
TYP
MAX
77.9
75.5
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
22076fc
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)
88
●
MIN
LTC2206
TYP
MAX
100
100
MIN
LTC2207
TYP
MAX
100
100
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
95
100
90
95
77.9
75.5
90
100
100
100
100
88
95
100
90
95
77.9
75.5
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
●
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
22076fc
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
V
ID
V
ICM
R
IN
C
IN
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
Differential Input Voltage
Common Mode Input Voltage
Input Resistance
Input Capacitance
High Level Input Voltage
Low Level Input Voltage
Input Current
Input Capacitance
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)
ENCODE INPUTS (ENC
+
, ENC
–
)
The
●
denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
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