sampling 14-bit A/D converters designed for digitizing
high frequency, 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 LTC2207-14/LTC2206-14 are perfect for demanding
communications applications, with AC performance that
includes 77.3dB SNR and 98dB spurious free dynamic
range (SFDR). Ultralow jitter of 80fs
RMS
allows under-
sampling of high input frequencies with excellent noise
performance. Maximum DC specs include ±1.5LSB 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.
n
Sample Rate: 105Msps/80Msps
77.3dBFS Noise Floor
98dB 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: 947mW/762mW
Optional Clock Duty Cycle Stabilizer
Out-of-Range Indicator
Pin-Compatible Family
n
105Msps: LTC2207 (16-Bit), LTC2207-14 (14-Bit)
n
80Msps: LTC2206 (16-Bit), LTC2206-14 (14-Bit)
n
65Msps: LTC2205 (16-Bit), LTC2205-14 (14-Bit)
n
40Msps: LTC2204 (16-Bit)
n
25Msps: LTC2203 (16-Bit) Single-Ended Clock
n
10Msps: LTC2202 (16-Bit) Single-Ended Clock
48-Pin 7mm
×
7mm QFN Package
Telecommunications
Receivers
Cellular Base Stations
Spectrum Analysis
Imaging Systems
ATE
applicaTions
n
n
n
n
n
n
Typical applicaTion
3.3V
SENSE
OV
DD
V
CM
2.2µF
AIN
+
ANALOG
INPUT
AIN
–
1.25V
COMMON MODE
BIAS VOLTAGE
INTERNAL ADC
REFERENCE
GENERATOR
0.5V TO 3.6V
0.1µF
OF
CLKOUT
+
CLKOUT
–
D13
•
•
•
D0
OGND
V
DD
GND
PGA
SHDN
DITH
MODE
OE
RAND
0.1µF
0.1µF
2207614 TA01
LTC2207-14: 32K Point FFT,
f
IN
= 14.86MHz, –1dBFS,
PGA = 0, 105Msps
0
–10
–20
–30
AMPLITUDE (dBFS)
3.3V
0.1µF
–40
–50
–60
–70
–80
–90
–100
–110
–120
0
10
30
40
20
FREQUENCY (MHz)
50
2207614 TA01b
+
–
S/H
AMP
14-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC AND
SHIFT REGISTER
OUTPUT
DRIVERS
CLOCK/DUTY
CYCLE
CONTROL
ENC
+
ENC
–
ADC CONTROL INPUTS
220714614fd
For more information
www.linear.com/LTC2207-14
1
LTC2207-14/LTC2206-14
OV
DD
= V
DD
(Notes 1, 2)
absoluTe MaxiMuM raTings
pin conFiguraTion
48 GND
47 PGA
46 RAND
45 MODE
44
OE
43 OF
42 D13
41 D12
40 D11
39 D10
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 D9
34 D8
33 D7
32 D6
31 OGND
30 CLKOUT+
29 CLKOUT
–
28 D5
27 D4
26 D3
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
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
LTC2207-14C/LTC2206-14C ..................... 0°C to 70°C
LTC2207-14I/LTC2206-14I ...................–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-14#PBF
LTC2206CUK-14#PBF
LTC2207IUK-14#PBF
LTC2206IUK-14#PBF
TAPE AND REEL
PART MARKING*
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
LTC2207CUK-14#TRPBF LTC2207UK-14
LTC2206CUK-14#TRPBF LTC2206UK-14
LTC2207IUK-14#TRPBF LTC2207UK-14
LTC2206IUK-14#TRPBF LTC2206UK-14
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/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
The
l
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
Differential Linearity Error
Offset Error
Offset Drift
Gain Error
Full-Scale Drift
Transition Noise
External Reference
Internal Reference
External Reference
l
converTer characTerisTics
CONDITIONS
Differential Analog Input (Note 5)
Differential Analog Input
(Note 6)
l
l
l
V
DD
13
V
DD
14
GND 15
SHDN 16
DITH 17
NC 18
NC 19
D0 20
D1 21
D2 22
OGND 23
OV
DD
24
MIN
TYP
±0.4
±0.1
±1
±10
±0.2
±30
±15
0.8
MAX
±1.5
±1
±10.3
±2.3
UNITS
LSB
LSB
mV
µV/
°C
%FS
ppm/°C
ppm/°C
LSB
RMS
220714614fd
2
For more information
www.linear.com/LTC2207-14
LTC2207-14/LTC2206-14
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
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 8)
0V ≤ SENSE ≤ V
DD
(Note 9)
l
l
l
l
analog inpuT
MIN
1
–1
–4
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
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
MIN
LTC2206-14
TYP
MAX
77.3
75.1
76
75.8
77.2
77.2
75
76.9
75
73.1
72.9
76.2
74.5
74.6
75.8
75.1
98
98
85
84
93
93
98
90
94
82
81
85
90
90
81
85
82
81
85
84
73.1
72.9
76
75.8
MIN
LTC2207-14
TYP
MAX UNITS
77.3
75.1
77.2
77.2
75
76.9
75
76.2
74.5
74.6
75.8
75.1
98
98
93
93
98
90
94
85
90
90
81
85
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
Signal-to-Noise Ratio 5MHz Input (2.25V Range, PGA = 0)
5MHz Input (1.5V Range, PGA = 1)
15MHz Input (2.25V Range, PGA = 0), T
A
= 25ºC
l
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), T
A
= 25ºC
l
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
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), T
A
= 25ºC
l
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), T
A
= 25ºC
l
140MHz Input (1.5V Range, PGA = 1)
170MHz Input (2.25V Range, PGA = 0)
170MHz Input (1.5V Range, PGA = 1)
220714614fd
For more information
www.linear.com/LTC2207-14
3
LTC2207-14/LTC2206-14
DynaMic accuracy
SYMBOL PARAMETER
SFDR
Spurious Free
Dynamic Range
4
th
Harmonic
or Higher
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
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)
l
l
MIN
LTC2206-14
TYP
MAX
100
100
LTC2207-14
MIN
TYP
MAX UNITS
100
100
90
100
100
100
100
86.5
95
97
89
93
77
74.9
75.9
75.7
77.1
77.1
75.3
76.7
75
72.7
72.5
74.8
74.5
74.5
74.4
73.7
100
100
100
100
100
100
97
97
96
96
108
108
95
107
107
107
107
102
102
100
100
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
86.5
95
97
89
93
77
74.9
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), T
A
= 25ºC
l
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), T
A
= 25ºC
l
140MHz Input (1.5V Range, PGA = 1)
170MHz Input (2.25V Range, PGA = 0)
170MHz Input (1.5V Range, PGA = 1)
72.7
72.5
75.9
75.7
77.1
77.1
75.3
76.7
75
74.8
74.5
74.5
74.1
73.7
100
100
100
100
100
100
97
97
96
96
108
108
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)
l
95
107
107
107
107
102
102
100
100
4
220714614fd
For more information
www.linear.com/LTC2207-14
LTC2207-14/LTC2206-14
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
l
The
l
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
l
denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
1. Introduction
Electronic scales are gradually replacing traditional measuring tools like springs and balances in everyday life, such as electronic price computing scales and electronic weigh...[详细]
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