LTC2216/LTC2215
16-Bit, 80Msps/65Msps
Low Noise ADC
DESCRIPTION
FEATURES
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The LTC®2216/LTC2215 are 80Msps/65Msps sampling 16bit A/D converters designed for digitizing high frequency,
wide dynamic range signals with input frequencies up to
400MHz. The input range of the ADC is fixed at 2.75VP-P.
Sample Rate: 80Msps/65Msps
81.5dBFS Noise Floor
100dB SFDR
SFDR >95dB at 70MHz
85fsRMS Jitter
2.75VP-P Input Range
400MHz Full Power Bandwidth S/H
Optional Internal Dither
Optional Data Output Randomizer
LVDS or CMOS Outputs
Single 3.3V Supply
Power Dissipation: 970mW/700mW
Clock Duty Cycle Stabilizer
Pin-Compatible with LTC2208, LTC2217
64-Pin (9mm × 9mm) QFN Package
The LTC2216/LTC2215 are perfect for demanding communications applications, with AC performance that
includes 81.5dBFS noise floor and 100dB spurious free
dynamic range (SFDR). Ultra low jitter of 85fsRMS allows
undersampling of high input frequencies while maintaining
excellent noise performance. Maximum DC specs include
±3.5LSB INL, ±1LSB DNL (no missing codes).
The digital output can be either differential LVDS or
single-ended CMOS. There are two format options for the
CMOS outputs: a single bus running at the full data rate or
demultiplexed buses running at half data rate. A separate
output power supply allows the CMOS output swing to
range from 0.5V to 3.6V.
APPLICATIONS
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Telecommunications
Receivers
Cellular Base Stations
Spectrum Analysis
Imaging Systems
ATE
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 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.
TYPICAL APPLICATION
3.3V
LTC2216: 64k Point FFT,
fIN = 4.9MHz, –1dBFS
SENSE
2.2μF
AIN+
1.575V
COMMON MODE
BIAS VOLTAGE
+
ANALOG
INPUT
AIN–
16-BIT
PIPELINED
ADC CORE
S/H
AMP
–
OVDD
INTERNAL ADC
REFERENCE
GENERATOR
0.5V TO 3.6V
1μF
OUTPUT
DRIVERS
CORRECTION
LOGIC AND
SHIFT REGISTER
OF
CLKOUT
D15
•
•
•
D0
CMOS
OR
LVDS
1μF
1μF
OGND
CLOCK/DUTY
CYCLE
CONTROL
3.3V
VDD
GND
1μF
22165 TA01
ENC
+
ENC
–
SHDN
DITH
MODE
LVDS
RAND
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
AMPLITUDE (dBFS)
VCM
0
10
20
30
FREQUENCY (MHz)
40
22165 TA01b
ADC CONTROL INPUTS
22165f
1
LTC2216/LTC2215
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
OVDD = VDD (Notes 1 and 2)
64 NC
63 RAND
62 MODE
61 LVDS
60 OF+/OFA
59 OF–/DA15
58 D15+/DA14
57 D15–/DA13
56 D14+/DA12
55 D14–/DA11
54 D13+/DA10
53 D13–/DA9
52 D12+/DA8
51 D12–/DA7
50 OGND
49 OVDD
TOP VIEW
SENSE 1
GND 2
VCM 3
GND 4
VDD 5
VDD 6
GND 7
AIN+ 8
AIN– 9
GND 10
GND 11
ENC+ 12
ENC– 13
GND 14
VDD 15
VDD 16
48 D11+/DA6
47 D11–/DA5
46 D10+/DA4
45 D10–/DA3
44 D9+/DA2
43 D9–/DA1
42 D8+/DA0
41 D8–/CLKOUTA
40 CLKOUT+/CLKOUTB
39 CLKOUT –/OFB
38 D7+/DB15
37 D7–/DB14
36 D6+/DB13
35 D6–/DB12
34 D5+/DB11
33 D5–/DB10
65
VDD 17
GND 18
SHDN 19
DITH 20
–/DB0 21
D0
+/DB1 22
DO
D1–/DB2 23
D1+/DB3 24
D2–/DB4 25
D2+/DB5 26
D3–/DB6 27
D3+/DB7 28
D4–/DB8 29
D4+/DB9 30
OGND 31
OVDD 32
Supply Voltage (VDD) ................................... –0.3V to 4V
Digital Output Supply Voltage (OVDD) .......... –0.3V to 4V
Digital Output Ground Voltage (OGND)........ –0.3V to 1V
Analog Input Voltage (Note 3) ..... –0.3V to (VDD + 0.3V)
Digital Input Voltage .................... –0.3V to (VDD + 0.3V)
Digital Output Voltage ................–0.3V to (OVDD + 0.3V)
Power Dissipation.............................................2000mW
Operating Temperature Range
LTC2215C/LTC2216C ............................... 0°C to 70°C
LTC2215I/LTC2216I..............................–40°C to 85°C
Storage Temperature Range ..................–65°C to 150°C
TJMAX = 150°C, θJA = 20°C/W
EXPOSED PAD (PIN 65) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2215CUP#PBF
LTC2215CUP#TRPBF
LTC2215UP
64-Lead (9mm × 9mm) Plastic QFN
0°C to 70°C
LTC2215IUP#PBF
LTC2215IUP#TRPBF
LTC2215UP
64-Lead (9mm × 9mm) Plastic QFN
–40°C to 85°C
LTC2216CUP#PBF
LTC2216CUP#TRPBF
LTC2216UP
64-Lead (9mm × 9mm) Plastic QFN
0°C to 70°C
LTC2216IUP#PBF
LTC2216IUP#TRPBF
LTC2216UP
64-Lead (9mm × 9mm) Plastic QFN
–40°C to 85°C
LEAD BASED FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2215CUP
LTC2215CUP#TR
LTC2215UP
64-Lead (9mm × 9mm) Plastic QFN
0°C to 70°C
LTC2215IUP
LTC2215IUP#TR
LTC2215UP
64-Lead (9mm × 9mm) Plastic QFN
–40°C to 85°C
LTC2216CUP
LTC2216CUP#TR
LTC2216UP
64-Lead (9mm × 9mm) Plastic QFN
0°C to 70°C
LTC2216IUP
LTC2216IUP#TR
LTC2216UP
64-Lead (9mm × 9mm) Plastic QFN
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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/
22165f
2
LTC2216/LTC2215
CONVERTER CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 4)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Integral Linearity Error
Differential Analog Input (Note 5)
l
±1.2
±3.5
LSB
Differential Linearity Error
Differential Analog Input
l
0.16/–0.2
±1
LSB
Offset Error
(Note 6)
l
±1.5
±8
mV
Offset Drift
±4
Gain Error
External Reference
l
μV/°C
±0.3
±1
%FS
Full-Scale Drift
Internal Reference
External Reference
–65
±12
ppm/°C
ppm/°C
Transition Noise
External Reference
2
LSBRMS
ANALOG INPUT
The l denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at TA = 25°C. (Note 4)
SYMBOL
PARAMETER
CONDITIONS
VIN
Analog Input Range (AIN+ – AIN–)
3.135V ≤ VDD ≤ 3.465V
VIN, CM
Analog Input Common Mode
Differential Input (Note 7)
l
1.2
IIN
Analog Input Leakage Current
0V ≤ AIN+, AIN– ≤ VDD
l
–1
ISENSE
SENSE Input Leakage Current
0V ≤ SENSE ≤ VDD
l
–3
IMODE
MODE Pin Pull-Down Current to GND
ILVDS
LVDS Pin Pull-Down Current to GND
CIN
Analog Input Capacitance
tAP
Sample-and-Hold
Acquisition Delay Time
tJITTER
Sample-and-Hold
Aperture Jitter
CMRR
Analog Input
Common Mode Rejection Ratio
BW-3dB
Full Power Bandwidth
Sample Mode ENC+ < ENC–
Hold Mode ENC+ > ENC–
MIN
TYP
MAX
2.75
1.575
UNITS
VP-P
1.8
V
1
μA
3
μA
10
μA
10
μA
9.1
1.8
pF
pF
0.35
ns
85
fs RMS
1.2V < (AIN+ = AIN–)
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