Electrical Specifications Subject to Change
FEATURES
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LTC2205/LTC2204
16-Bit, 65Msps/40 Msps
ADCs
DESCRIPTIO
The LTC
®
2205/LTC2204 are sampling 16-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 LTC2205/LTC2204 are perfect for demanding com-
munications applications, with AC performance that in-
cludes 78dB SNR and 100dB spurious free dynamic range
(SFDR). Ultralow jitter of 120fs
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 3.3V.
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 cycle.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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Sample Rate: 65Msps/40Msps
79dB SNR and 100dB SFDR (2.25V Range)
SFDR >83dB at 170MHz (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: 530mW/470mW
Optional Clock Duty Cycle Stabilizer
Out-of-Range Indicator
Pin Compatible Family
105Msps: LTC2207 (16-Bit)
80Msps: LTC2206 (16-Bit)
65Msps: LTC2205 (16-Bit),
40Msps: LTC2204 (16-Bit)
48-Pin 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 3.3V
1µF
OF
CLKOUT
D15
•
•
•
D0
AIN
+
ANALOG
INPUT
AIN
–
+
S/H
AMP
–
16-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC AND
SHIFT REGISTER
OUTPUT
DRIVERS
OGND
CLOCK/DUTY
CYCLE
CONTROL
V
DD
GND
ENC
ENC
PGA
SHDN
DITH
MODE
OE
RAND
1µF
1µF
3.3V
1µF
22076 TA01
ADC CONTROL INPUTS
U
U
U
22054p
1
LTC2205/LTC2204
ABSOLUTE
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
48 GND
47 PGA
46 RAND
45 MODE
44 OE
43 OF
42 D15
41 D14
40 D13
39 D12
38 OGND
37 OVP
TOP VIEW
OV
DD
= V
DD
(Notes 1 and 2)
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
LTC2205C/LTC2204C ............................... 0°C to 70°C
LTC2205I/LTC2204I ............................. –40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Digital Output Supply Voltage (OV
DD
) .......... –0.3V to 4V
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 OVP
35 D11
34 D10
33 D9
32 D8
31 OGND
30 CLKOUT+
29 CLKOUT
–
28 D7
27 D6
26 D5
25 OVP
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
ORDER PART NUMBER
LTC2205C
LTC2204C
LTC2205I
LTC2204I
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 LTC Marketing for parts specified with wider operating temperature ranges.
*The temperature grade is identified by a label on the shipping container.
CO VERTER CHARACTERISTICS
PARAMETER
Resolution
(No Missing Codes)
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
●
V
DD
13
V
DD
14
GND 15
SHDN 16
DITH 17
D0 18
D1 19
D2 20
D3 21
D4 22
OGND 23
OVP 24
UK PART MARKING*
XXXXX
XXXXX
MIN
16
●
●
●
●
TYP
±0.7
±0.3
±1
±10
±0.2
±30
±10
2.5
MAX
±4
±1
±5
±0.5
UNITS
Bits
LSB
LSB
mV
μV/
°C
%FS
ppm/°C
ppm/°C
Differential Analog Input (Note 5)
Differential Analog Input
(Note 6)
External Reference
Internal Reference
External Reference
LSB
RMS
22054p
2
U
W
U
U
W W
W
U
LTC2205/LTC2204
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
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
0V ≤ SENSE ≤ V
DD
Sample Mode ENC
+
< ENC
–
Hold Mode ENC
+
> ENC
–
MIN
●
●
●
●
DY A IC 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)
25MHz Input (2.25V Range, PGA = 0)
25MHz 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
2
nd
or 3
rd
Harmonic
SFDR
Spurious Free
Dynamic Range
4
th
Harmonic
or Higher
U
W U
U
1
–1
–1
TYP
1.5 to 2.25
1.25
MAX
1.5
1
1
10
6
1.2
–0.7
120
UNITS
V
P-P
V
µA
µA
µA
pF
ns
fs
RMS
dB
MHz
1V < (A
IN+
= A
IN–
) <1.5V
80
700
MIN
LTC2204
TYP
79.0
76.4
MAX
MIN
LTC2205
TYP
79.0
76.4
MAX
UNITS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
22054p
TBD
77.9
75.7
72.6
71.7
67.3
67.0
TBD
77.9
75.7
72.6
71.7
67.3
67.0
TBD
65.4
65.2
100
100
TBD
65.4
65.2
100
100
5MHz Input (2.25V Range, PGA = 0)
5MHz Input (1.5V Range, PGA = 1)
25MHz Input (2.25V Range, PGA = 0)
25MHz 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)
5MHz Input (2.25V Range, PGA = 0)
5MHz Input (1.5V Range, PGA = 1)
25MHz Input (2.25V Range, PGA = 0)
25MHz 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)
●
●
●
●
TBD
90
90
90
90
82
85
TBD
90
90
90
90
82
85
TBD
82
84
105
105
TBD
82
84
105
105
TBD
98
98
100
100
97
97
TBD
98
98
100
100
97
97
TBD
95
95
TBD
95
95
3
LTC2205/LTC2204
DY A IC ACCURACY
SYMBOL PARAMETER
S/(N+D)
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
5MHz Input (2.25V Range, PGA = 0)
5MHz Input (1.5V Range, PGA = 1)
25MHz Input (2.25V Range, PGA = 0)
25MHz 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
SFDR
The
●
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
±100
1
2
MAX
1.35
UNITS
V
ppm/°C
CO
4
U U UU
U
UU
W U
MIN
LTC2204
TYP
79.0
76.5
MAX
MIN
LTC2205
TYP
79.0
76.5
MAX
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
TBD
77.5
75.5
72.3
71.6
67.0
66.9
TBD
77.5
75.5
72.3
71.6
67.0
66.9
TBD
65.3
65.1
105
105
TBD
65.3
65.1
105
105
Spurious Free
Dynamic Range
at –25dBFS
Dither “OFF”
5MHz Input (2.25V Range, PGA = 0)
5MHz Input (1.5V Range, PGA = 1)
25MHz Input (2.25V Range, PGA = 0)
25MHz 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)
●
●
TBD
105
105
105
105
100
100
TBD
105
105
105
105
100
100
TBD
100
100
115
115
TBD
100
100
115
115
Spurious Free
Dynamic Range
at –25dBFS
Dither “OFF”
5MHz Input (2.25V Range, PGA = 0)
5MHz Input (1.5V Range, PGA = 1)
25MHz Input (2.25V Range, PGA = 0)
25MHz 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)
●
●
TBD
115
115
115
115
115
115
TBD
115
115
115
115
115
115
TBD
105
105
TBD
105
105
O
ODE BIAS CHARACTERISTICS
mV/ V
Ω
22054p
LTC2205/LTC2204
DIGITAL I PUTS A D DIGITAL OUTPUTS
SYMBOL
PARAMETER
ENCODE INPUTS (ENC
+
, ENC
–
)
V
ID
Differential Input Voltage
V
ICM
Common Mode Input Voltage
R
IN
Input Resistance
C
IN
Input Capacitance
LOGIC INPUTS (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
●
The
●
denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
MIN
0.2
1.6
1.2
6
3
●
●
●
POWER REQUIRE E TS
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
The
●
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. A
IN
= –1dBFS. (Note 9)
CONDITIONS
SHDN = V
DD
●
●
●
●
U W
U
U
TYP
MAX
UNITS
V
V
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)
V
DD
k
Ω
pF
V
V
µA
pF
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
●
●
3.0
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
MIN
3.135
0.5V
LTC2204
TYP
3.3
2
MAX
3.465
3.6
MIN
3.315
0.5V
LTC2205
TYP
3.3
2
3.3
160
580
MAX
3.465
3.6
UNITS
V
mW
V
mA
mW
141
470
22054p
5
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