LTC2242IUP-10#PBF Linear Technology, LTC2242IUP-10#PBF Datasheet

IC ADC 10BIT 250MSPS 64-QFN

LTC2242IUP-10#PBF

Manufacturer Part Number
LTC2242IUP-10#PBF
Description
IC ADC 10BIT 250MSPS 64-QFN
Manufacturer
Linear Technology
Datasheet

Specifications of LTC2242IUP-10#PBF

Number Of Bits
10
Sampling Rate (per Second)
250M
Data Interface
Parallel
Number Of Converters
1
Power Dissipation (max)
975mW
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
64-WFQFN, Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
APPLICATIONS
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
TYPICAL APPLICATION
ANALOG
INPUT
REFH
REFL
Sample Rate: 250Msps
60.5dB SNR
78dB SFDR
1.2GHz Full Power Bandwidth S/H
Single 2.5V Supply
Low Power Dissipation: 740mW
LVDS, CMOS, or Demultiplexed CMOS Outputs
Selectable Input Ranges: ±0.5V or ±1V
No Missing Codes
Optional Clock Duty Cycle Stabilizer
Shutdown and Nap Modes
Data Ready Output Clock
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)*
64-Pin 9mm × 9mm QFN Package
Wireless and Wired Broadband Communication
Cable Head-End Systems
Power Amplifi er Linearization
Communications Test Equipment
+
CLOCK/DUTY
REFERENCE
INPUT
CONTROL
FLEXIBLE
ENCODE
S/H
CYCLE
INPUT
PIPELINED
ADC CORE
10-BIT
2.5V
V
DD
CORRECTION
LOGIC
DRIVERS
OUTPUT
224210 TA01
TO 2.625V
D9
D0
0.5V
DESCRIPTION
The LTC
verter designed for digitizing high frequency, wide dynamic
range signals. The LTC2240-10 is perfect for demanding
communications applications with AC performance that
includes 60.5dB SNR and 78dB SFDR. Ultralow jitter of
95fs
performance.
DC specs include ±0.4LSB INL (typ), ±0.2LSB 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
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.
L, LT, LTC and LTM 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.
OV
OGND
CMOS
OR
LVDS
DD
RMS
®
+
2242-10 is a 250Msps, sampling 10-bit A/D con-
allows IF undersampling with excellent noise
and ENC
10-Bit, 250Msps ADC
inputs may be driven differentially or
85
80
75
70
65
60
55
50
45
40
0
SFDR vs Input Frequency
100
200
INPUT FREQUENCY (MHz)
300
2V RANGE
400
LTC2242-10
500
600 700
1V RANGE
800
224210 G11
900
1000
224210fc
1

Related parts for LTC2242IUP-10#PBF

LTC2242IUP-10#PBF Summary of contents

Page 1

... An optional clock duty cycle stabilizer allows high performance over a wide range of clock duty cycles. L, LT, LTC and LTM 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. ...

Page 2

... LEAD BASED FINISH TAPE AND REEL LTC2242CUP-10#PBF LTC2242CUP-10#TR LTC2242IUP-10#PBF LTC2242IUP-10#TR Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *Temperature grades are identifi label on the shipping container. For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to: CONVERTER CHARACTERISTICS temperature range, otherwise specifi ...

Page 3

CONVERTER CHARACTERISTICS temperature range, otherwise specifi cations are at T PARAMETER Offset Drift Full-Scale Drift Transition Noise ANALOG INPUT ● The denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are ...

Page 4

LTC2242-10 INTERNAL REFERENCE CHARACTERISTICS PARAMETER V Output Voltage CM V Output Tempco CM V Line Regulation CM V Output Resistance CM DIGITAL INPUTS AND DIGITAL OUTPUTS full operating temperature range, otherwise specifi cations are at T SYMBOL PARAMETER + – ...

Page 5

POWER REQUIREMENTS range, otherwise specifi cations are SYMBOL PARAMETER V Analog Supply Voltage DD P Sleep Mode Power SLEEP P Nap Mode Power NAP LVDS OUTPUT MODE OV Output Supply Voltage DD I Analog Supply Current VDD ...

Page 6

LTC2242-10 ELECTRICAL CHARACTERISTICS Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: All voltage ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS 8192 Point FFT 70MHz, IN –1dB, 2V Range, LVDS Mode 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 100 120 FREQUENCY (MHz) 224210 G04 8192 Point ...

Page 8

LTC2242-10 TYPICAL PERFORMANCE CHARACTERISTICS SFDR and SNR vs Sample Rate, 2V Range 30MHz, –1dB, IN LVDS Mode 90 85 SFDR SNR 100 150 200 250 SAMPLE RATE (Msps) 224210 G13 ...

Page 9

PIN FUNCTIONS (CMOS Mode (Pins 1, 2): Positive Differential Analog Input. IN – A (Pins 3, 4): Negative Differential Analog Input. IN REFHA (Pins 5, 6): ADC High Reference. Bypass to Pins 7, 8 with 0.1μF ceramic chip ...

Page 10

LTC2242-10 PIN FUNCTIONS (LVDS Mode) + AIN (Pins 1, 2): Positive Differential Analog Input. – AIN (Pins 3, 4): Negative Differential Analog Input. REFHA (Pins 5, 6): ADC High Reference. Bypass to Pins 7, 8 with 0.1μF ceramic chip capacitor, ...

Page 11

FUNCTIONAL BLOCK DIAGRAM + A IN INPUT FIRST PIPELINED S/H ADC STAGE – 1.25V CM REFERENCE 2.2μF RANGE SELECT REF SENSE BUF SECOND PIPELINED THIRD PIPELINED ADC STAGE ADC STAGE REFH REFL INTERNAL CLOCK SIGNALS DIFFERENTIAL DIFF ...

Page 12

LTC2242-10 TIMING DIAGRAMS ANALOG INPUT – ENC + ENC D0-D9, OF – CLKOUT + CLKOUT ANALOG INPUT – ENC + ENC DA0-DA9, OFA CLKOUTB CLKOUTA DB0-DB9, OFB 12 LVDS Output Mode Timing All Outputs Are Differential and Have LVDS Levels ...

Page 13

TIMING DIAGRAMS ANALOG INPUT – ENC + ENC DA0-DA9, OFA DB0-DB9, OFB CLKOUTB CLKOUTA Demultiplexed CMOS Outputs with Simultaneous Update ANALOG INPUT – ENC + ENC DA0-DA9, OFA DB0-DB9, OFB CLKOUTB CLKOUTA Demultiplexed CMOS Outputs with Interleaved Update All Outputs ...

Page 14

LTC2242-10 APPLICATIONS INFORMATION DYNAMIC PERFORMANCE Signal-to-Noise Plus Distortion Ratio The signal-to-noise plus distortion ratio [S/(N + D)] is the ratio between the RMS amplitude of the fundamen- tal input frequency and the RMS amplitude of all other frequency components at ...

Page 15

APPLICATIONS INFORMATION Each pipelined stage shown in Figure 1 contains an ADC, a reconstruction DAC and an interstage residue amplifi er. In operation, the ADC quantizes the input to the stage and the quantized value is subtracted from the input ...

Page 16

LTC2242-10 APPLICATIONS INFORMATION driver circuit. The V pin must be bypassed to ground CM close to the ADC with a 2.2μF or greater capacitor. Input Drive Impedance As with all high performance, high speed ADCs, the dy- namic performance of ...

Page 17

APPLICATIONS INFORMATION the sample-and-hold charging glitches and limiting the wideband noise at the converter input. For input frequen- cies higher than 100MHz, the capacitor may need to be decreased to prevent excessive signal loss. + – The A and A ...

Page 18

LTC2242-10 APPLICATIONS INFORMATION LTC2242-10 2Ω 1.25V 2.2μF RANGE DETECT AND CONTROL TIE TO V FOR 2V RANGE; DD SENSE TIE TO V FOR 1V RANGE; CM RANGE = 2 • V FOR SENSE REFLB 0.5V < V < ...

Page 19

APPLICATIONS INFORMATION T1 MA/COM 0.1μF ETC1-1-13 CLOCK • INPUT 0.1μF + ENC V = 1.5V THRESHOLD – 1.5V ENC 0.1μF Figure 12a. Single-Ended ENC Drive, Not Recommended for Low Jitter Maximum and Minimum Encode Rates The maximum encode rate for ...

Page 20

LTC2242-10 APPLICATIONS INFORMATION Table 1. Output Codes vs Input Voltage + – A – – (2V Range) OF (Offset Binary) >+1.000000V 1 11 1111 1111 +0.998047V 0 11 1111 1111 +0.996094V 0 11 1111 1110 ...

Page 21

APPLICATIONS INFORMATION LTC2242- DATA PREDRIVER FROM LOGIC LATCH OE Figure 13a. Digital Output Buffer in CMOS Mode Data Format The LTC2242-10 parallel digital output can be selected for offset binary or 2’s complement format. The format ...

Page 22

LTC2242-10 APPLICATIONS INFORMATION Output Enable The outputs may be disabled with the output enable pin, OE. In CMOS or LVDS output modes OE high disables all data outputs including OF and CLKOUT. The data access and bus relinquish times are ...

Page 23

APPLICATIONS INFORMATION The lowest phase noise oscillators have single-ended sinusoidal outputs, and for these devices the use of a fi lter close to the ADC may be benefi cial. This fi lter should be close to the ADC to both ...

Page 24

LTC2242-10 APPLICATIONS INFORMATION GND 16 GND 61 GND 64 GND ...

Page 25

APPLICATIONS INFORMATION Silkscreen Top Layer 1 Component Side LTC2242-10 Layer 2 GND Plane Layer 3 Power/Ground Plane 25 224210fc ...

Page 26

LTC2242-10 APPLICATIONS INFORMATION Layer 4 Power/Ground Planes Layer 5 Power/Ground Planes 26 Layer Back Solder Side Silk Screen Back, Solder Side 224210fc ...

Page 27

... PIN 1 TOP MARK (SEE NOTE 5) Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. UP Package 64-Lead Plastic QFN (9mm × ...

Page 28

... High IIP3: 20dBm at 1.9GHz, Integrated LO Quadrature Generator High IIP3: 21.5dBm at 900MHz, Integrated LO Quadrature Generator High IIP3: 21dBm at 800MHz, Integrated LO Quadrature Generator 4.5V to 5.25V Supply, 25dBm IIP3 at 900MHz 12.5dB, 50Ω Single-Ended RF and LO Ports www.linear.com ● 224210fc LT 1107 REV C • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2006 ...

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