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Linear Technology Electronic Components Datasheet

LTC2247 Datasheet

(LTC2246 - LTC2248) 65/40/25Msps Low Power 3V ADCs

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LTC2247 pdf
FEATURES
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Sample Rate: 65Msps/40Msps/25Msps
Single 3V Supply (2.7V to 3.4V)
Low Power: 205mW/120mW/75mW
74.3dB SNR
90dB SFDR
No Missing Codes
Flexible Input: 1VP-P to 2VP-P Range
575MHz Full Power Bandwidth S/H
Clock Duty Cycle Stabilizer
Shutdown and Nap Modes
Pin Compatible Family
125Msps: LTC2253 (12-Bit), LTC2255 (14-Bit)
105Msps: LTC2252 (12-Bit), LTC2254 (14-Bit)
80Msps: LTC2229 (12-Bit), LTC2249 (14-Bit)
65Msps: LTC2228 (12-Bit), LTC2248 (14-Bit)
40Msps: LTC2227 (12-Bit), LTC2247 (14-Bit)
25Msps: LTC2226 (12-Bit), LTC2246 (14-Bit)
10Msps: LTC2225 (12-Bit), LTC2245 (14-Bit)
32-Pin (5mm × 5mm) QFN Package
U
APPLICATIO S
Wireless and Wired Broadband Communication
Imaging Systems
Ultrasound
Spectral Analysis
Portable Instrumentation
LTC2248/LTC2247/LTC2246
14-Bit, 65/40/25Msps
Low Power 3V ADCs
DESCRIPTIO
The LTC®2248/LTC2247/LTC2246 are 14-bit 65Msps/
40Msps/25Msps, low power 3V A/D converters designed
for digitizing high frequency, wide dynamic range signals.
The LTC2248/LTC2247/LTC2246 are perfect for demand-
ing imaging and communications applications with AC
performance that includes 74.3dB SNR and 90dB SFDR
for signals at the Nyquist frequency.
DC specs include ±1LSB INL (typ), ±0.5LSB DNL (typ) and
no missing codes over temperature. The transition noise
is a low 1LSBRMS.
A single 3V supply allows low power operation. A separate
output supply allows the outputs to drive 0.5V to 3.6V
logic.
A single-ended CLK input controls converter operation. An
optional clock duty cycle stabilizer allows high perfor-
mance at full speed for a wide range of clock duty cycles.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
REFH
REFL
FLEXIBLE
REFERENCE
ANALOG
INPUT
+
INPUT
S/H
14-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC
CLOCK/DUTY
CYCLE
CONTROL
CLK
OUTPUT
DRIVERS
OVDD
D13
D0
OGND
2249 TA01a
LTC2248: SNR vs Input Frequency,
–1dB, 2V Range, 65Msps
75
74
73
72
71
70
0 50 100 150 200
INPUT FREQUENCY (MHZ)
2249 TAO1b
224876fa
1


Linear Technology Electronic Components Datasheet

LTC2247 Datasheet

(LTC2246 - LTC2248) 65/40/25Msps Low Power 3V ADCs

No Preview Available !

LTC2247 pdf
LTC2248/LTC2247/LTC2246
ABSOLUTE AXI U RATI GS
OVDD = VDD (Notes 1, 2)
Supply Voltage (VDD) ................................................. 4V
Digital Output Ground Voltage (OGND) ....... –0.3V to 1V
wwwA.dnaatalsohgeeItn4pu.ucot mVoltage (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 ............................................ 1500mW
Operating Temperature Range
LTC2248C, LTC2247C, LTC2246C ........... 0°C to 70°C
LTC2248I, LTC2247I, LTC2246I ..........–40°C to 85°C
Storage Temperature Range ..................–65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
AIN+ 1
AIN2
32 31 30 29 28 27 26 25
24
23
D10
D9
REFH 3
22 D8
REFH 4
REFL 5
33 21 OVDD
20 OGND
REFL 6
19 D7
VDD 7
GND 8
18 D6
17 D5
9 10 11 12 13 14 15 16
UH PACKAGE
32-LEAD (5mm × 5mm) PLASTIC QFN
TJMAX = 125°C, θJA = 34°C/W
EXPOSED PAD IS GND (PIN 33)
MUST BE SOLDERED TO PCB
ORDER PART NUMBER QFN PART MARKING*
LTC2248CUH
LTC2248IUH
LTC2247CUH
LTC2247IUH
LTC2246CUH
LTC2246IUH
2248
2248
2247
2247
2246
2246
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 The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 4)
PARAMETER
Resolution
(No Missing Codes)
Integral
Linearity Error
Differential
Linearity Error
Offset Error
CONDITIONS
Differential Analog Input
(Note 5)
Differential Analog Input
(Note 6)
LTC2248
LTC2247
LTC2246
MIN TYP MAX MIN TYP MAX MIN TYP MAX
14 14 14
UNITS
Bits
–4 ±1 4 –4 ±1 4 –4 ±1 4
LSB
–1 ±0.5 1
–1 ±0.5 1
–1 ±0.5 1
LSB
–12 ±2 12 –12 ±2 12 –12 ±2 12
mV
Gain Error
Offset Drift
Full-Scale Drift
Transition Noise
2
External Reference
Internal Reference
External Reference
SENSE = 1V
–2.5 ±0.5 2.5 –2.5 ±0.5 2.5 –2.5 ±0.5 2.5
%FS
±10 ±10 ±10 µV/°C
±30 ±30 ±30 ppm/°C
±5 ±5 ±5 ppm/°C
1 1 1 LSBRMS
224876fa


Part Number LTC2247
Description (LTC2246 - LTC2248) 65/40/25Msps Low Power 3V ADCs
Maker Linear Technology
Total Page 24 Pages
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