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PDF LTC2358-16 Data sheet ( Hoja de datos )
| Número de pieza | LTC2358-16 | |
| Descripción | 200ksps/Ch Differential ADC | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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Features
LTC2358-16
Buffered Octal, 16-Bit, 200ksps/Ch
Differential ±10.24V ADC with
30VP-P Common Mode Range
Description
nn 200ksps per Channel Throughput
nn Eight Buffered Simultaneous Sampling Channels
nn 400pA/4nA Max Input Leakage at 85°C/125°C
nn ±1LSB INL (Maximum, ±10.24V Range)
nn Guaranteed 16-Bit, No Missing Codes
nn Differential, Wide Common Mode Range Inputs
nn Per-Channel SoftSpan Input Ranges:
±10.24V, 0V to 10.24V, ±5.12V, 0V to 5.12V
±12.5V, 0V to 12.5V, ±6.25V, 0V to 6.25V
nn 94.2dB 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
The LTC®2358-16 is a 16-bit, low noise 8-channel simulta-
neous 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 LTC2358-16
allow the ADC to directly digitize a variety of signals us-
ing minimal board space and power. This input signal
flexibility, combined with ±1LSB INL, no missing codes
at 16 bits, and 94.2dB SNR, makes the LTC2358-16 an
ideal choice for many high voltage applications requiring
wide dynamic range.
The LTC2358-16 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 Linear Technology Corporation. All other trademarks are the property
of their respective owners. Protected by U.S. Patents, including 7705765, 7961132, 8319673,
9197235.
Typical Application
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
IINN00+– S/H
S/H
S/H
S/H
S/H
S/H
S/H
IINN77+– S/H
EIGHT BUFFERED
SIMULTANEOUS
SAMPLING CHANNELS
15V
0.1µF
VCC
5V
0.1µF
2.2µF
1.8V TO 5V
0.1µF
CMOS OR LVDS
I/O INTERFACE
VDD VDDLBYP OVDD LVDS/CMOS
PD
LTC2358-16
SDO0
MUX
16-BIT
SAR ADC
VEE REFBUF REFIN
GND
0.1µF
–15V
47µF
0.1µF
SDO7
SCKO
SCKI
SDI
CS
BUSY
CNV
235816 TA01a
SAMPLE
CLOCK
For more information www.linear.com/LTC2358-16
Integral Nonlinearity vs
Output Code and Channel
1.00
0.75
TRUE BIPOLAR D±R1I0V.E24(IVNR– A=N0GVE)
ALL CHANNELS
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
–32768
–16384
0
16384 32768
OUTPUT CODE
235816 TA01b
235816f
1
1 page  
LTC2358-16
D igital Inputs and Digital Outputs The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at TA = 25°C. (Note 9)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
CMOS Digital Inputs and Outputs
VIH High Level Input Voltage
VIL Low Level Input Voltage
IIN Digital Input Current
CIN Digital Input Capacitance
VOH High Level Output Voltage
VOL Low Level Output Voltage
IOZ Hi-Z Output Leakage Current
ISOURCE Output Source Current
ISINK Output Sink Current
LVDS Digital Inputs and Outputs
VIN = 0V to OVDD
IOUT = –500μA
IOUT = 500μA
VOUT = 0V to OVDD
VOUT = 0V
VOUT = OVDD
l 0.8 • OVDD
l
l –10
0.2 • OVDD
10
5
l OVDD – 0.2
l
0.2
l –10
10
–50
50
V
V
μA
pF
V
V
μA
mA
mA
VID
RID
VICM
IICM
VOD
VOCM
IOZ
Differential Input Voltage
On-Chip Input Termination
Resistance
Common-Mode Input Voltage
Common-Mode Input Current
Differential Output Voltage
Common-Mode Output Voltage
Hi-Z Output Leakage Current
CS = 0V, VICM = 1.2V
CS = OVDD
VIN+ = VIN– = 0V to OVDD
RL = 100Ω Differential Termination
RL = 100Ω Differential Termination
VOUT = 0V to OVDD
l 200 350 600
l 90
106 125
10
l 0.3 1.2 2.2
l –10
10
l 275 350 425
l 1.1 1.2 1.3
l –10
10
mV
Ω
MΩ
V
μA
mV
V
μA
Power Requirements The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. (Note 9)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VCC Supply Voltage
VEE Supply Voltage
VCC − VEE Supply Voltage Difference
VDD Supply Voltage
IVCC Supply Current
200ksps Sample Rate, 8 Channels Enabled (Note 17)
Acquisition Mode (Note 17)
Nap Mode
Power Down Mode
l 7.5
l –16.5
l 10
l 4.75
l
l
l
l
5.00
4.6
8.5
2.9
6
38
0
38
5.25
5.3
9.8
3.3
15
V
V
V
V
mA
mA
mA
μA
IVEE Supply Current
200ksps Sample Rate, 8 Channels Enabled (Note 17)
Acquisition Mode (Note 17)
Nap Mode
Power Down Mode
l –5.5
l –9.8
l –3.5
l –15
–4.5
–8
–2.8
–4
mA
mA
mA
μA
CMOS I/O Mode
OVDD
IVDD
Supply Voltage
Supply Current
l 1.71
5.25
200ksps Sample Rate, 8 Channels Enabled (Note 17)
200ksps Sample Rate, 8 Channels Enabled, VREFBUF = 5V (Notes 15, 17)
Acquisition Mode (Note 17)
Nap Mode
Power Down Mode (C-Grade and I-Grade)
Power Down Mode (H-Grade)
l
l
l
l
l
l
15.6 18
13.8 16
2.1 2.7
1.7 2.4
106 275
106 500
V
mA
mA
mA
mA
μA
µA
For more information www.linear.com/LTC2358-16
235816f
5
5 Page 
LTC2358-16
T ypical Performan ce Characteristics TA = 25°C, VCC = +15V, VEE = –15V, VDD = 5V,
OVDD = 2.5V, Internal Reference and Buffer (VREFBUF = 4.096V), fSMPL = 200ksps, unless otherwise noted.
SNR, SINAD vs Input Level,
fIN = 2kHz
95.0 TRUE BIPOLAR D±R1I0V.E24(IVNR– A=N0GVE)
94.8
94.6
SNR
94.4
SINAD
94.2
94.0
–40
–30 –20 –10
INPUT LEVEL (dBFS)
0
235816 G19
CMRR vs Input Frequency
and Channel
140
130
IN+ = IN–±1=01.284VVP–RPASNINGEE
ALL CHANNELS
120
110
100
90
80
70
60
10
100 1k 10k 100k 1M
FREQUENCY (Hz)
235816 G20
Crosstalk vs Input Frequency
and Channel
–80
–85
–90
±IINN1000+–.2==4V01V8RVAPN–PGESINE
–95 ALL CHANNELS CONVERTING
CH1
–100
–105
CH2
–110
–115
–120
–125
–130
–135
10
CH7
100 1k 10k 100k 1M
FREQUENCY (Hz)
235816 G21
SNR, SINAD vs Temperature,
fIN = 2kHz
96.0
95.5 TRUE BIPOLAR D±R1I0V.E24(IVNR– A=N0GVE)
95.0
94.5 SNR
94.0
SINAD
93.5
93.0
92.5
92.0
–55 –35 –15 5 25 45 65 85
TEMPERATURE (°C)
105 125
235816 G22
THD, Harmonics vs Temperature,
fIN = 2kHz
–95 TRUE BIPOLAR D±R1I0V.E24(IVNR– A=N0GVE)
–100
–105
–110
–115
THD
2ND
–120
3RD
–125
–55 –35 –15 5 25 45 65 85
TEMPERATURE (°C)
105 125
235816 G23
INL, DNL vs Temperature
1.00
0.75
TRUE BIPOLAR D±R1I0V.E24(IVNR– A=N0GVE)
ALL CHANNELS
0.50
0.25 MAX INL
0
–0.25
MAX DNL
MIN DNL
–0.50 MIN INL
–0.75
–1.00
–55 –35 –15 5 25 45 65 85
TEMPERATURE (°C)
105 125
235816 G24
Analog Input Leakage
Current vs Temperature
10k
1k
16 ANALOG INPUT PIN TRACES
FOR EACH INPUT VOLTAGE
IN = 0V
100 IN = +10V
IN = –10V
10
1
0.1
–55 –35 –15 5 25 45 65 85
TEMPERATURE (°C)
105 125
235816 G25
Positive Full-Scale Error vs
Temperature and Channel
0.100
0.075
0.050
±10.24V RANGE
REFBUF OVERDRIVEN
VREFBUF = 4.096V
ALL CHANNELS
0.025
0.000
–0.025
–0.050
–0.075
–0.100
–55 –35 –15 5 25 45 65 85
TEMPERATURE (°C)
105 125
235816 G26
Zero-Scale Error vs
Temperature and Channel
3
±10.24V RANGE
2 ALL CHANNELS
1
0
–1
–2
–3
–55 –35 –15 5 25 45 65 85
TEMPERATURE (°C)
105 125
235816 G27
For more information www.linear.com/LTC2358-16
235816f
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11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LTC2358-16.PDF ] | |
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