LTC2323-12 ADC Datasheet

LTC2323-12 Datasheet PDF, Equivalent


Part Number

LTC2323-12

Description

5Msps Differential Input ADC

Manufacture

Analog Devices

Total Page 26 Pages
Datasheet
Download LTC2323-12 Datasheet


LTC2323-12
LTC2323-12
Dual, 12-Bit + Sign, 5Msps
Differential Input ADC with Wide
Input Common Mode Range
FEATURES
DESCRIPTION
nn 5Msps Throughput Rate
nn ±0.5LSB INL (Typ)
nn Guaranteed 12-Bit, No Missing Codes
nn 8VP-P Differential Inputs with Wide Input Common
Mode Range
nn 73dB SNR (Typ) at fIN = 2MHz
nn –85dB THD (Typ) at fIN = 2MHz
nn Guaranteed Operation to 125°C
nn Single 3.3V or 5V Supply
nn Low Drift (20ppm/°C Max) 2.048V or 4.096V Internal
Reference
nn 1.8V to 2.5V I/O Voltages
nn CMOS or LVDS SPI-Compatible Serial I/O
nn Power Dissipation 38mW/Ch (Typ)
nn Small 28-Lead (4mm × 5mm) QFN Package
APPLICATIONS
nn High Speed Data Acquisition Systems
nn Communications
nn Remote Data Acquisition
nn Imaging
nn Optical Networking
nn Automotive
nn Multiphase Motor Control
The LTC®2323-12 is a low noise, high speed dual
12-bit + sign successive approximation register (SAR)
ADC with differential inputs and wide input common mode
range. Operating from a single 3.3V or 5V supply, the
LTC2323-12 has an 8VP-P differential input range, making
it ideal for applications which require a wide dynamic
range with high common mode rejection. The LTC2323-
12 achieves ±0.5LSB INL typical, no missing codes at 12
bits and 73dB SNR.
The LTC2323-12 has an onboard low drift (20ppm/°C max)
2.048V or 4.096V temperature-compensated reference.
The LTC2323-12 also has a high speed SPI-compatible
serial interface that supports CMOS or LVDS. The fast
5Msps per channel throughput with one-cycle latency
makes the LTC2323-12 ideally suited for a wide variety of
high speed applications. The LTC2323-12 dissipates only
38mW per channel and offers nap and sleep modes to
reduce the power consumption to 5μW for further power
savings during inactive periods.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog
Devices, Inc. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
DIFFERENTIAL INPUTS
NO CONFIGURATION REQUIRED
IN+, IN
INSTRUMENTATION
DIFFERENTIAL
25Ω
0V 0V
3.3V OR 5V
10µF
AIN1+
220pF
VDD REFOUT1
VBYP1
LTC2323-12
REFOUT2
10µF
1µF
10µF
16k Point FFT fS = 5Msps, fIN = 2.2MHz
0 SNR = 73dBFS
THD = –86dB
–20 SINAD = 72.8dB
SFDR = 88dB
–40
–60
BIPOLAR
0V
UNIPOLAR
25Ω
0V
VBYP2
AIN1–
AIN2+
AIN2–
VDD
CMOS/LVDS
REFINT
GND
SDO1
SDO2
CLKOUT
SCK
CNV
OGND OVDD
1µF
TO CONTROL
LOGIC
(FPGA, CPLD,
DSP, ETC.)
1.8V TO 2.5V
1µF
232312 TA01a
–80
–100
–120
0
0.5 1 1.5 2 2.5
FREQUENCY (MHz)
232312 TA01b
For more information www.linear.com/LTC2323-12
232312fb
1

LTC2323-12
LTC2323-12
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
Supply Voltage (VDD)...................................................6V
Supply Voltage (OVDD).................................................3V
Supply Bypass Voltage (VBYP1, VBYP2)........................3V
Analog Input Voltage
AIN+, AIN– (Note 3).................... –0.3V to (VDD + 0.3V)
REFOUT1,2.............................. .–0.3V to (VDD + 0.3V)
CNV (Note 15)........................... –0.3V to (VDD + 0.3V)
Digital Input Voltage
(Note 3)........................... (GND – 0.3V) to (OVDD + 0.3V)
Digital Output Voltage
(Note 3)........................... (GND – 0.3V) to (OVDD + 0.3V)
Power Dissipation................................................200mW
Operating Temperature Range
LTC2323C................................................. 0°C to 70°C
LTC2323I..............................................–40°C to 85°C
LTC2323H........................................... –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
28 27 26 25 24 23
VDD 1
AIN2+ 2
AIN2– 3
GND 4
GND 5
22 SCK
21 SCK+
20 SDO2
29 19 SDO2+
GND 18 CLKOUT
AIN1– 6
AIN1+ 7
VDD 8
17 CLKOUT+
16 SDO1
15 SDO1+
9 10 11 12 13 14
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
TJMAX = 125°C, θJA = 43°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION http://www.linear.com/product/LTC2323-12#orderinfo
LEAD FREE FINISH
TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2323CUFD-12#PBF LTC2323CUFD-12#TRPBF 23232
28-Lead (4mm × 5mm) Plastic QFN
0°C to 70°C
LTC2323IUFD-12#PBF LTC2323IUFD-12#TRPBF
23232
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
LTC2323HUFD-12#PBF LTC2323HUFD-12#TRPBF 23232
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified 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 specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
E LECTRICAL CHARACTERISTICS 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
MIN TYP MAX UNITS
VIN+
VIN–
VIN+ – VIN–
VCM
IIN
CIN
CMRR
IREFOUT
Absolute Input Range (AIN1+, AIN2+)
Absolute Input Range (AIN1–, AIN2–)
Input Differential Voltage Range
Common Mode Input Range
Analog Input DC Leakage Current
Analog Input Capacitance
Input Common Mode Rejection Ratio
External Reference Current
(Note 5)
(Note 5)
VIN = VIN+ – VIN–
VIN = (VIN+ + VIN–)/2
fIN = 2.2MHz
REFINT = 0V, REFOUT = 4.096V
l0
l0
l –REFOUT1,2
l0
l –1
10
85
675
2 For more information www.linear.com/LTC2323-12
VDD
VDD
REFOUT1,2
VDD
1
V
V
V
V
µA
pF
dB
µA
232312fb


Features LTC2323-12 Dual, 12-Bit + Sign, 5Msps D ifferential Input ADC with Wide Input C ommon Mode Range FEATURES DESCRIPTION nn 5Msps Throughput Rate nn ±0.5LSB INL (Typ) nn Guaranteed 12-Bit, No Miss ing Codes nn 8VP-P Differential Inputs with Wide Input Common Mode Range nn 73 dB SNR (Typ) at fIN = 2MHz nn –85dB T HD (Typ) at fIN = 2MHz nn Guaranteed Op eration to 125°C nn Single 3.3V or 5V Supply nn Low Drift (20ppm/°C Max) 2.0 48V or 4.096V Internal Reference nn 1.8 V to 2.5V I/O Voltages nn CMOS or LVDS SPI-Compatible Serial I/O nn Power Diss ipation 38mW/Ch (Typ) nn Small 28-Lead (4mm × 5mm) QFN Package APPLICATIONS n n High Speed Data Acquisition Systems n n Communications nn Remote Data Acquisi tion nn Imaging nn Optical Networking n n Automotive nn Multiphase Motor Contro l The LTC®2323-12 is a low noise, hig h speed dual 12-bit + sign successive a pproximation register (SAR) ADC with di fferential inputs and wide input common mode range. Operating from a single 3.3V or 5V supply, the LTC2323-12.
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