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LTC2242CUP-12#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30
LTC2242-12
1
224212fc
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
12-Bit, 250Msps ADC
The LTC
®
2242-12 is a 250Msps, sampling 12-bit A/D con-
verter designed for digitizing high frequency, wide dynamic
range signals. The LTC2242-12 is perfect for demanding
communications applications with AC performance that
includes 65.4dB SNR and 78dB SFDR. Ultralow jitter of
95fs
RMS
allows IF undersampling with excellent noise
performance.
DC specs include ±1.0LSB INL (typ), ±0.4LSB DNL (typ)
and no missing codes over temperature.
The digital outputs can be either differential LVDS, or
single-ended CMOS. There are three format options for
the CMOS outputs: a single bus running at the full data
rate or two demultiplexed buses running at half data rate
with either interleaved or simultaneous update. A separate
output power supply allows the CMOS output swing to
range from 0.5V to 2.625V.
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 over a wide range of clock duty cycles.
SFDR vs Input Frequency
n
Sample Rate: 250Msps
n
65.4dB SNR
n
78dB SFDR
n
1.2GHz Full Power Bandwidth S/H
n
Single 2.5V Supply
n
Low Power Dissipation: 740mW
n
LVDS, CMOS, or Demultiplexed CMOS Outputs
n
Selectable Input Ranges: ±0.5V or ±1V
n
No Missing Codes
n
Optional Clock Duty Cycle Stabilizer
n
Shutdown and Nap Modes
n
Data Ready Output Clock
n
Pin Compatible Family
250Msps: LTC2242-12 (12-Bit), LTC2242-10 (10-Bit)
210Msps: LTC2241-12 (12-Bit), LTC2241-10 (10-Bit)
170Msps: LTC2240-12 (12-Bit), LTC2240-10 (10-Bit)
185Msps: LTC2220-1 (12-Bit)*
170Msps: LTC2220 (12-Bit), LTC2230 (10-Bit)*
135Msps: LTC2221 (12-Bit), LTC2231 (10-Bit)*
n
64-Pin 9mm × 9mm QFN Package
n
Wireless and Wired Broadband Communication
n
Cable Head-End Systems
n
Power Amplifi er Linearization
n
Communications Test Equipment
–
+
INPUT
S/H
CORRECTION
LOGIC
OUTPUT
DRIVERS
12-BIT
PIPELINED
ADC CORE
CLOCK/DUTY
CYCLE
CONTROL
FLEXIBLE
REFERENCE
D11
•
•
•
D0
ENCODE
INPUT
REFH
REFL
ANALOG
INPUT
224212 TA01
CMOS
OR
LVDS
0.5V
TO 2.625V
2.5V
V
DD
OV
DD
OGND
INPUT FREQUENCY (MHz)
0
SFDR (dBFS)
70
80
85
800
224212 G11
60
50
65
75
55
45
40
200100
400300
600 700 900
500
1000
1V RANGE
2V RANGE
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.
*LTC2220-1, LTC2220, LTC2221, LTC2230, LTC2231 are 3.3V parts.
LTC2242-12
2
224212fc
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
DD
) ...............................................2.8V
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)
OV
DD
= V
DD
(Notes 1, 2)
TOP VIEW
UP PACKAGE
64-LEAD (9mm × 9mm) PLASTIC QFN
EXPOSED PAD (PIN 65) IS GND, MUST BE SOLDERED TO PCB
T
JMAX
= 150°C, θ
JA
= 20°C/W
A
IN
+
1
A
IN
+
2
A
IN
–
3
A
IN
–
4
REFHA 5
REFHA 6
REFLB
7
REFLB
8
REFHB 9
REFHB 10
REFLA 11
REFLA 12
V
DD
13
V
DD
14
V
DD
15
GND 16
48 D9
+
/DA6
47 D9
–
/DA5
46 D8
+
/DA4
45 D8
–
/DA3
44 D7
+
/DA2
43 D7
–
/DA1
42 OV
DD
41 OGND
40 D6
+
/DA0
39 D6
–
/CLKOUTA
38 D5
+
/CLKOUTB
37 D5
–
/OFB
36 CLKOUT
+
/DB11
35 CLKOUT
–
/DB10
34 OV
DD
33 OGND
64 GND
63 V
DD
62 V
DD
61 GND
60 V
CM
59 SENSE
58 MODE
57 LVDS
56 OF
+
/OFA
55 OF
–
/DA11
54 D11
+
/DA10
53 D11
–
/DA9
52 D10
+
/DA8
51 D10
–
/DA7
50 OGND
49 OV
DD
ENC
+
17
ENC
–
18
SHDN
19
OE
20
DO
–
/DB0 21
DO
+
/DB1 22
D1
–
/DB2 23
D1
+
/DB3 24
OGND 25
OV
DD
26
D2
–
/DB4 27
D2
+
/DB5 28
D3
–
/DB6 29
D3
+
/DB7 30
D4
–
/DB8 31
D4
+
/DB9 32
65
ORDER INFORMATION
PIN CONFIGURATION
Power Dissipation .............................................1500mW
Operating Temperature Range
LTC2242C-12 ........................................... 0°C to 70°C
LTC2242I-12 ........................................–40°C to 85°C
Storage Temperature Range ................... –65°C to 150°C
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2242CUP-12#PBF LTC2242CUP-12#TRPBF LTC2242UP-12 64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C
LTC2242IUP-12#PBF LTC2242IUP-12#TRPBF LTC2242UP-12 64-Lead (9mm × 9mm) Plastic QFN –40°C to 85°C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2242CUP-12 LTC2242CUP-12#TR LTC2242UP-12 64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C
LTC2242IUP-12 LTC2242IUP-12#TR LTC2242UP-12 64-Lead (9mm × 9mm) Plastic QFN –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *Temperature grades are identifi ed 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 specifi cations, go to: http://www.linear.com/tapeandreel/
LTC2242-12
3
224212fc
ANALOG INPUT
The ● denotes the specifi cations which apply over the full operating temperature range, otherwise
specifi cations are at T
A
= 25°C. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Analog Input Range (A
IN
+
– A
IN
–
) 2.375V < V
DD
< 2.625V (Note 7)
●
±0.5 to ±1 V
V
IN, CM
Analog Input Common Mode (A
IN
+
+ A
IN
–
)/2 Differential Input (Note 7)
●
1.2 1.25 1.3 V
I
IN
Analog Input Leakage Current 0 < A
IN
+
, A
IN
–
< V
DD
●
–1 1 μA
I
SENSE
SENSE Input Leakage 0V < SENSE < 1V
●
–1 1 μA
I
MODE
MODE Pin Pull-Down Current to GND 7 μA
I
LVDS
LVDS Pin Pull-Down Current to GND 7 μA
t
AP
Sample and Hold Acquisition Delay Time 0.4 ns
t
JITTER
Sample and Hold Acquisition Delay Time Jitter 95 fs
RMS
Full Power Bandwidth Figure 8 Test Circuit 1200 MHz
DYNAMIC ACCURACY
The ● denotes the specifi cations which apply over the full operating temperature range,
otherwise specifi cations are at T
A
= 25°C. A
IN
= –1dBFS. (Note 4)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SNR Signal-to-Noise Ratio (Note 10) 10MHz Input 65.4 dB
70MHz Input
l
63.4 65.3 dB
140MHz Input 65.3 dB
240MHz Input 65.1 dB
SFDR Spurious Free Dynamic Range
2nd or 3rd Harmonic
(Note 11)
10MHz Input 78 dB
70MHz Input
l
65 75 dB
140MHz Input 74 dB
240MHz Input 73 dB
Spurious Free Dynamic Range
4th Harmonic or Higher
(Note 11)
10MHz Input 87 dB
70MHz Input
l
73 87 dB
140MHz Input 87 dB
240MHz Input 87 dB
S/(N+D) Signal-to-Noise Plus
Distortion Ratio
(Note 12)
10MHz Input 65.3 dB
70MHz Input
l
61.8 65.1 dB
140MHz Input 64.8 dB
240MHz Input 64.5 dB
IMD Intermodulation Distortion f
IN1
= 135MHz, f
IN2
= 140MHz 81 dBc
CONVERTER CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. (Note 4)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes)
●
12 Bits
Integral Linearity Error Differential Analog Input (Note 5)
●
–2.7 ±1 2.7 LSB
Differential Linearity Error Differential Analog Input
●
–1 ±0.4 1 LSB
Offset Error (Note 6)
●
–17 ±5 17 mV
Gain Error External Reference
●
–3.2 ±0.7 3.2 %FS
Offset Drift ±10 μV/C
Full-Scale Drift Internal Reference
External Reference
±60
±45
ppm/C
ppm/C
Transition Noise SENSE = 1V 0.74 LSB
RMS
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30

LTC2242CUP-12#TRPBF

Mfr. #:
Buy LTC2242CUP-12#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 12-B, 250Msps ADC
Lifecycle:
New from this manufacturer.
Delivery:
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