LTC2321-16 ADC Datasheet

LTC2321-16 Datasheet PDF, Equivalent


Part Number

LTC2321-16

Description

2Msps Differential Input ADC

Manufacture

Analog Devices

Total Page 26 Pages
PDF Download
Download LTC2321-16 Datasheet PDF


LTC2321-16
LTC2321-16
FEATURES
Dual, 16-Bit, 2Msps
Differential Input ADC with Wide
Input Common Mode Range
DESCRIPTION
nn 2Msps Throughput Rate
nn ±4LSB INL (Typ)
nn Guaranteed 16-Bit, No Missing Codes
nn 8VP-P Differential Inputs with Wide Input Common
Mode Range
nn 81dB SNR (Typ) at fIN = 500kHz
nn –90dB THD (Typ) at fIN = 500kHz
nn No Cycle Latency
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 31mW/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®2321-16 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 LTC2321-
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 LTC2321-16 achieves
±4LSB INL typical, no missing codes at 16 bits and 81dB
SNR.
The LTC2321-16 has an onboard low drift (20ppm/°C
max) 2.048V or 4.096V temperature-compensated
reference. The LTC2321-16 also has a high speed SPI-
compatible serial interface that supports CMOS or LVDS.
The fast 2Msps per channel throughput with no cycle
latency makes the LTC2321-16 ideally suited for a wide
variety of high speed applications. The LTC2321-16
dissipates only 31mW per channel and offers nap and
sleep modes to reduce the power consumption to 5μW
for further power savings during inactive periods.
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
3.3V OR 5V
DIFFERENTIAL INPUTS
NO CONFIGURATION REQUIRED
IN+, IN
INSTRUMENTATION
DIFFERENTIAL
25Ω
0V
BIPOLAR
0V
UNIPOLAR
25Ω
0V 0V
10µF
VDD REFOUT1
AIN1+
220pF
VBYP1
LTC2321-16
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
232116 TA01a
32k Point FFT fS = 2Msps, fIN = 500kHz
0 SNR = 81.0dB
–20
THD = –94.6dB
SINAD = 80.8dB
SFDR = 100.9dB
–40
–60
–80
–100
–120
–140
0
0.2 0.4 0.6 0.8
1
FREQUENCY (MHz)
232116 TA01b
Document Feedback
For more information www.analog.com
Rev. D
1

LTC2321-16
LTC2321-16
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
LTC2321C................................................. 0°C to 70°C
LTC2321I..............................................–40°C to 85°C
LTC2321H........................................... –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
GND
19 SDO2+
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
LEAD FREE FINISH
TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2321CUFD-16#PBF LTC2321CUFD-16#TRPBF 23216
28-Lead (4mm × 5mm) Plastic QFN
0°C to 70°C
LTC2321IUFD-16#PBF LTC2321IUFD-16#TRPBF
23216
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 85°C
LTC2321HUFD-16#PBF LTC2321HUFD-16#TRPBF 23216
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Tape and reel specifications. 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
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 = 500kHz
REFINT = 0V, REFOUT = 4.096V
l0
l0
l –REFOUT1,2
l0
l –1
10
85
310
VDD
VDD
REFOUT1,2
VDD
1
UNITS
V
V
V
V
µA
pF
dB
µA
Rev. D
2 For more information www.analog.com


Features LTC2321-16 FEATURES Dual, 16-Bit, 2Msp s Differential Input ADC with Wide Inpu t Common Mode Range DESCRIPTION nn 2Ms ps Throughput Rate nn ±4LSB INL (Typ) nn Guaranteed 16-Bit, No Missing Codes nn 8VP-P Differential Inputs with Wide Input Common Mode Range nn 81dB SNR (Ty p) at fIN = 500kHz nn –90dB THD (Typ) at fIN = 500kHz nn No Cycle Latency nn Guaranteed Operation to 125°C nn Sing le 3.3V or 5V Supply nn Low Drift (20pp m/°C Max) 2.048V or 4.096V Internal Re ference nn 1.8V to 2.5V I/O Voltages nn CMOS or LVDS SPI-Compatible Serial I/O nn Power Dissipation 31mW/Ch (Typ) nn Small 28-Lead (4mm × 5mm) QFN Package APPLICATIONS nn High Speed Data Acquisi tion Systems nn Communications nn Remot e Data Acquisition nn Imaging nn Optica l Networking nn Automotive nn Multiphas e Motor Control The LTC®2321-16 is a low noise, high speed dual 16-bit succe ssive approximation register (SAR) ADC with differential inputs and wide input common mode range. Operating from a single 3.3V or 5V supply, the LTC.
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