ADC. LTC2323-16 Datasheet

LTC2323-16 Datasheet PDF

Part LTC2323-16
Description Differential Input ADC
Feature FEATURES LTC2323-16 Dual, 16-Bit, 5Msps Differential Input ADC with Wide Input Common Mode Range DE.
Manufacture Linear Technology
Datasheet
Download LTC2323-16 Datasheet





LTC2323-16
FEATURES
LTC2323-16
Dual, 16-Bit, 5Msps
Differential Input ADC with Wide
Input Common Mode Range
DESCRIPTION
n 5Msps Throughput Rate
n ±4LSB INL (Typ)
n Guaranteed 16-Bit, No Missing Codes
n 8VP-P Differential Inputs with Wide Input Common
Mode Range
n 81dB SNR (Typ) at fIN = 2MHz
n –85dB THD (Typ) at fIN = 2MHz
n Guaranteed Operation to 125°C
n Single 3.3V or 5V Supply
n Low Drift (20ppm/°C Max) 2.048V or 4.096V Internal
Reference
n 1.8V to 2.5V I/O Voltages
n CMOS or LVDS SPI-Compatible Serial I/O
n Power Dissipation 40mW/Ch (Typ)
n Small 28-Lead (4mm × 5mm) QFN Package
APPLICATIONS
n High Speed Data Acquisition Systems
n Communications
n Remote Data Acquisition
n Imaging
n Optical Networking
n Automotive
n Multiphase Motor Control
The LTC®2323-16 is a low noise, high speed dual 16-bit
successive approximation register (SAR) ADC with
differential inputs and wide input common mode range.
Operating from a single 3.3V or 5V supply, the LTC2323-16
has an 8VP-P differential input range, making it ideal for
applications which require a wide dynamic range with high
common mode rejection. The LTC2323-16 achieves ±4LSB
INL typical, no missing codes at 16 bits and 81dB SNR.
The LTC2323-16 has an onboard low drift (20ppm/°C max)
2.048V or 4.096V temperature-compensated reference.
The LTC2323-16 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 LTC2323-16 ideally suited for a wide variety of
high speed applications. The LTC2323-16 dissipates only
40mW 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
ARBITRARY
DIFFERENTIAL
25Ω
0V 0V
BIPOLAR
UNIPOLAR
25Ω
0V 0V
3.3V OR 5V
10µF
AIN1+
220pF
VDD REFOUT1
VBYP1
LTC2323-16
REFOUT2
VBYP2
AIN1–
AIN2+
AIN2–
VDD
CMOS/LVDS
REFINT
GND
SDO1
SDO2
CLKOUT
SCK
CNV
OGND OVDD
10µF
1µF
10µF
1µF
TO CONTROL
LOGIC
(FPGA, CPLD,
DSP, ETC.)
1.8V TO 2.5V
1µF
232316 TA01a
32k Point FFT fS = 5Msps, fIN = 2.2MHz
0 SNR = 81.4dB
–20
THD = –86.8dB
SINAD = 80.3dB
SFDR = 88.2dB
–40
–60
–80
–100
–120
–140
0
0.5 1 1.5 2 2.5
FREQUENCY (MHz)
232316 TA01b
For more information www.linear.com/LTC2323-16
232316fc
1



LTC2323-16
LTC2323-16
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
22 SCK
AIN2+ 2
AIN2– 3
GND 4
GND 5
21 SCK+
20 SDO2
29 19 SDO2+
GND 18 CLKOUT
AIN1– 6
17 CLKOUT+
AIN1+ 7
16 SDO1
VDD 8
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/LTC2323-16#orderinfo
LEAD FREE FINISH
TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2323CUFD-16#PBF LTC2323CUFD-16#TRPBF 23236
28-Lead (4mm × 5mm) Plastic QFN
0°C to 70°C
LTC2323IUFD-16#PBF LTC2323IUFD-16#TRPBF
23236
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
LTC2323HUFD-16#PBF LTC2323HUFD-16#TRPBF 23236
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/LTC2323-16
VDD
VDD
REFOUT1,2
VDD
1
V
V
V
V
µA
pF
dB
µA
232316fc




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