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Analog Devices Semiconductor Electronic Components Datasheet

LTC2358CLX-18 Datasheet

200ksps/Ch Differential ADC

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LTC2358-18
Buffered Octal, 18-Bit, 200ksps/Ch Differential
±10.24V ADC with 30VP-P Common Mode Range
FEATURES
nn Simultaneous Sampling of 8 Buffered Channels
nn 200ksps per Channel Throughput
nn 500pA/12nA Max Input Leakage at 85°C/125°C
nn ±3.5LSB INL (Maximum, ±10.24V Range)
nn Guaranteed 18-Bit, No Missing Codes
nn Differential, Wide Common Mode Range Inputs
nn Per-Channel SoftSpan Input Ranges:
nn ±10.24V, 0V to 10.24V, ±5.12V, 0V to 5.12V
nn ±12.5V, 0V to 12.5V, ±6.25V, 0V to 6.25V
nn 96.4dB Single-Conversion SNR (Typical)
nn −111dB THD (Typical) at fIN = 2kHz
nn 128dB CMRR (Typical) at fIN = 200Hz
nn Rail-to-Rail Input Overdrive Tolerance
nn Integrated Reference and Buffer (4.096V)
nn SPI CMOS (1.8V to 5V) and LVDS Serial I/O
nn Internal Conversion Clock, No Cycle Latency
nn 219mW Power Dissipation (27mW/Ch Typical)
nn 48-Lead (7mm x 7mm) LQFP Package
APPLICATIONS
nn Programmable Logic Controllers
nn Industrial Process Control
nn Power Line Monitoring
nn Test and Measurement
DESCRIPTION
The LTC®2358-18 is an 18-bit, low noise 8-channel simul-
taneous sampling successive approximation register (SAR)
ADC with buffered differential, wide common mode range
picoamp inputs. Operating from a 5V low voltage supply,
flexible high voltage supplies, and using the internal refer-
ence and buffer, each channel of this SoftSpanTM ADC can be
independently configured on a conversion-by-conversion
basis to accept ±10.24V, 0V to 10.24V, ±5.12V, or 0V to
5.12V signals. Individual channels may also be disabled
to increase throughput on the remaining channels.
The integrated picoamp-input analog buffers, wide input
common mode range and 128dB CMRR of the LTC2358-18
allow the ADC to directly digitize a variety of signals us-
ing minimal board space and power. This input signal
flexibility, combined with ±3.5LSB INL, no missing codes
at 18 bits, and 96.4dB SNR, makes the LTC2358-18 an
ideal choice for many high voltage applications requiring
wide dynamic range.
The LTC2358-18 supports pin-selectable SPI CMOS (1.8V
to 5V) and LVDS serial interfaces. Between one and eight
lanes of data output may be employed in CMOS mode,
allowing the user to optimize bus width and throughput.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
SoftSpan is a trademark of Analog Devices Inc. All other trademarks are the property of their
respective owners. Protected by U.S. Patents, including 7705765, 7961132, 8319673, 9197235.
TYPICAL APPLICATION
15V
5V
0.1µF
0.1µF
2.2µF
1.8V TO 5V
0.1µF
CMOS OR LVDS
I/O INTERFACE
ARBITRARY
+10V
0V
–10V
FULLY
DIFFERENTIAL
+5V
0V
–5V
TRUE BIPOLAR
UNIPOLAR
+10V
+10V
0V
0V
–10V
–10V
DIFFERENTIAL INPUTS IN+/IN– WITH
WIDE INPUT COMMON MODE RANGE
BUFFERS
IN0+
IN0–
S/H
S/H
S/H
S/H
S/H
S/H
S/H
IINN77+–
S/H
EIGHT BUFFERED
SIMULTANEOUS
SAMPLING CHANNELS
VCC
VDD VDDLBYP OVDD LVDS/CMOS
PD
LTC2358-18
SDO0
MUX
18-BIT
SAR ADC
VEE REFBUF REFIN GND
0.1µF
–15V
47µF
0.1µF
SDO7
SCKO
SCKI
SDI
CS
BUSY
CNV
235818 TA01a
SAMPLE
CLOCK
For more information www.linear.com/LTC2358-18
Integral Nonlinearity vs
vsOOuutptpuutt CCooddeeanadnCdhaCnhnaenl nel
2.0
±10.24V RANGE
1.5
TRUE BIPOLAR DRIVE (IN= 0V)
ALL CHANNELS
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–131072
–65536
0
65536 131072
OUTPUT CODE
235818 TA01b
235818f
1


Analog Devices Semiconductor Electronic Components Datasheet

LTC2358CLX-18 Datasheet

200ksps/Ch Differential ADC

No Preview Available !

LTC2358-18
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
Supply Voltage (VCC)......................–0.3V to (VEE + 40V)
Supply Voltage (VEE)................................. –17.4V to 0.3V
Supply Voltage Difference (VCC – VEE).......................40V
Supply Voltage (VDD)...................................................6V
Supply Voltage (OVDD).................................................6V
Internal Regulated Supply Bypass (VDDLBYP).... (Note 3)
Analog Input Voltage
IN0+ to IN7+,
IN0to IN7(Note 4).......... (VEE – 0.3V) to (VCC + 0.3V)
REFIN..................................................... –0.3V to 2.8V
REFBUF, CNV (Note 5).............. –0.3V to (VDD + 0.3V)
Digital Input Voltage (Note 5)...... –0.3V to (OVDD + 0.3V)
Digital Output Voltage (Note 5)... –0.3V to (OVDD + 0.3V)
Power Dissipation............................................... 500mW
Operating Temperature Range
LTC2358C................................................. 0°C to 70°C
LTC2358I..............................................–40°C to 85°C
LTC2358H........................................... –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
IN6– 1
IN6+ 2
IIIIINNNNN54435–+–+–
3
4
5
6
7
IN3+ 8
IIIINNNN2211–+–+
9
10
11
12
LX PACKAGE
48-LEAD (7mm × 7mm) PLASTIC LQFP
TJMAX = 150°C, θJA = 53°C/W
36 SDO7
35
34
33
32
SSSSDDCCKKOOOO–+–+//SS//SSDDDCOOKO65O4
31 OVDD
30 GND
29 SCKI–/SCKI
28
27
SSCDKI–I+/S/SDDOO23
26 SDI+/SDO1
25 SDO0
ORDER INFORMATION http://www.linear.com/product/LTC2358-18#orderinfo
TRAY
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2358CLX-18#PBF
LTC2358LX-18
48-Lead (7mm × 7mm) Plastic LQFP
0°C to 70°C
LTC2358ILX-18#PBF
LTC2358LX-18
48-Lead (7mm × 7mm) Plastic LQFP
–40°C to 85°C
LTC2358HLX-18#PBF
LTC2358LX-18
48-Lead (7mm × 7mm) Plastic LQFP
–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/
235818f
2
For more information www.linear.com/LTC2358-18


Part Number LTC2358CLX-18
Description 200ksps/Ch Differential ADC
Maker Analog Devices
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