SAR ADC. LTC2387-18 Datasheet

LTC2387-18 ADC. Datasheet pdf. Equivalent

LTC2387-18 Datasheet
Recommendation LTC2387-18 Datasheet
Part LTC2387-18
Description 15Msps SAR ADC
Feature LTC2387-18; Features nn 15Msps Throughput Rate nn No Pipeline Delay, No Cycle Latency nn 95.7dB SNR (Typ) at fIN.
Manufacture Linear
Datasheet
Download LTC2387-18 Datasheet





Linear LTC2387-18
Features
nn 15Msps Throughput Rate
nn No Pipeline Delay, No Cycle Latency
nn 95.7dB SNR (Typ) at fIN = 1MHz
nn 102dB SFDR (Typ) at fIN = 1MHz
nn Nyquist Sampling Up to 7.5MHz Input
nn Guaranteed 18-Bit, No Missing Codes
nn ±3LSB INL (Max)
nn 8.192VP-P Differential Inputs
nn 5V and 2.5V Supplies
nn Internal 20ppm/°C (Max) Reference
nn Serial LVDS Interface
nn 125mW Power Dissipation
nn 32-Pin (5mm × 5mm) QFN Package
Applications
nn High Speed Data Acquisition
nn Imaging
nn Communications
nn Control Loops
nn Instrumentation
nn ATE
LTC2387-18
18-Bit, 15Msps SAR ADC
Description
The LTC®2387-18 is a low noise, high speed, 18-bit 15Msps
successive approximation register (SAR) ADC ideally
suited for a wide range of applications. The combination
of excellent linearity and wide dynamic range makes the
LTC2387-18 ideal for high speed imaging and instru-
mentation applications. No latency operation provides a
unique solution for high speed control loop applications.
The very low distortion at high input frequencies enables
communications applications requiring wide dynamic
range and significant signal bandwidth.
To support high speed operation while minimizing the
number of data lines, the LTC2387-18 features a serial
LVDS digital interface. The LVDS interface has one-lane
and two-lane output modes, allowing the user to optimize
the interface data rate for each application.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 7705765, 8232905, 8810443. Other patents are pending.
Typical Application
4.096V
0V
4.096V
0V
0.1µF
5V
0.1µF
2.5V 2.5V
0.1µF
24.9Ω
VDD
IN+
+ 82pF
VDDL OVDD
CLK
DCO LVDS
DA INTERFACE
DB
LTC2387-18
24.9Ω
82pF
IN
TWOLANES
TESTPAT
PD
0.1µF
VCM
REFBUF REFGND REFIN
GND CNV
SAMPLE
CLOCK
10µF
0.1µF
238718 TA01a
FFT, fSMPL = 15Msps, fIN = 2kHz
fIN = 2kHz
0
SNR = 96.0dB
–20 THD = –117dB
SINAD = 95.7dB
–40 SFDR = 119dB
–60
–80
–100
–120
–140
–160
0
2.5 5
FREQUENCY (MHz)
7.5
238718 TA01b
For more information www.linear.com/LTC2387-18
238718fa
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Linear LTC2387-18
LTC2387-18
Absolute Maximum Ratings
(Notes 1, 2)
Supply Voltage (VDD)...................................................6V
Supply Voltage (VDDL, OVDD)....................................2.8V
Analog Input Voltage (Note 3)
IN+, IN..........................(GND – 0.3V) to (VDD + 0.3V)
REFBUF..........................(GND – 0.3V) to (VDD + 0.3V)
REFIN (Note 4)............................(GND – 0.3V) to 2.8V
Digital Input Voltage (Note 3)
PD, TESTPAT..............
CLK+, CLK.................
TWOLANES, CNV+,
(GND
(GND
0.3V)
0.3V)
to
to
(OVDD
(OVDD
+
+
0.3V)
0.3V)
CNV............................(GND – 0.3V) to (VDDL + 0.3V)
Power Dissipation............................................... 500mW
Operating Temperature Range
LTC2387C................................................. 0°C to 70°C
LTC2387I..............................................–40°C to 85°C
Storage Temperature Range................... –65°C to 150°C
Pin Configuration
TOP VIEW
GND 1
IN+ 2
IN3
GND 4
REFGND 5
REFGND 6
REFBUF 7
REFBUF 8
32 31 30 29 28 27 26 25
24 CLK+
23 CLK
22 OVDD
33 21 GND
GND 20 DCO+
19 DCO
18 DA+
17 DA
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 (PIN 33) IS GND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2387CUH-18#PBF
LTC2387CUH-18#TRPBF 238718
32-Lead (5mm × 5mm) Plastic QFN
0°C to 70°C
LTC2387IUH-18#PBF
LTC2387IUH-18#TRPBF 238718
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 85°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 5)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
VIN+
VIN–
VIN+ – VIN–
VINCM
IIN
CIN
Absolute Input Range (IN+)
Absolute Input Range (IN)
Input Differential Voltage Range
Common Mode Input Range
Analog Input DC Leakage Current
Analog Input Capacitance
(Note 6)
(Note 6)
VIN+ – VIN–
(VIN+ + VIN–)/2
Sample Mode
Hold Mode
l –0.1
l –0.1
l –VREFBUF
l VREFBUF/2 – 0.1
l –1
VREFBUF/2
20
2
VREFBUF + 0.1
VREFBUF + 0.1
VREFBUF
VREFBUF/2 + 0.1
1
CMRR
Input Common Mode Rejection Ratio
fIN = 1MHz
75
UNITS
V
V
V
V
μA
pF
pF
dB
2
For more information www.linear.com/LTC2387-18
238718fa



Linear LTC2387-18
LTC2387-18
C onverter Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 5)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
Resolution
l 18
Bits
No Missing Codes
l 18
Bits
Transition Noise
INL Integral Linearity Error
REFBUF = 4.096V (Notes 7, 9)
1.4 LSBRMS
l –3
±0.6
3
LSB
DNL Differential Linearity Error
l –0.9
±0.2
0.9
LSB
ZSE Zero-Scale Error
(Note 8)
l –16
±1.5
16
LSB
Zero-Scale Error Drift
0.02 LSB/°C
FSE Full-Scale Error
REFBUF = 4.096V (REFBUF Overdriven) (Notes 8, 9) l –25
REFIN = 2.048V (REFIN Overdriven) (Note 8)
l –160
±5
±25
25
160
LSB
LSB
Full-Scale Error Drift
REFBUF = 4.096V (REFBUF Overdriven) (Note 9)
REFIN = 2.048V (REFIN Overdriven)
±0.1 ppm/°C
±1.5 ppm/°C
Dynamic Accuracy The l denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at TA = 25°C and AIN = –1dBFS. (Notes 5, 10)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
SINAD
SNR
THD
SFDR
Signal-to-(Noise + Distortion) Ratio
Signal-to-Noise Ratio
Total Harmonic Distortion
(First Five Harmonics)
Spurious Free Dynamic Range
–3dB Input Bandwidth
fIN = 2kHz
fIN = 1MHz
fIN = 5MHz
fIN = 2kHz
fIN = 1MHz
fIN = 5MHz
fIN = 2kHz
ffIINN
=
=
1MHz
5MHz
ffIINN
=
=
2kHz
1MHz
fIN = 5MHz
l 93
l 92.6
95.7
94.5
83
l 93.2
l 93
96
95.7
94.6
l –117 –103
l –101 –96
–83
l 103
l 97
119
102
84
200
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
MHz
I nternal Reference Characteristics The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VREFIN
Internal Reference Output Voltage
VREFIN Temperature Coefficient
REFIN Output Impedance
IOUT = 0μA
(Note 11)
2.043
l
2.048
±5
15
2.053
±20
V
ppm/°C
VREFIN Line Regulation
REFIN Input Voltage Range
VDD = 4.75V to 5.25V
(REFIN Overdriven) (Note 6)
l 2.008
0.3
2.048
2.088
mV/V
V
For more information www.linear.com/LTC2387-18
238718fa
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