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PDF LTC2333-16 Data sheet ( Hoja de datos )
| Número de pieza | LTC2333-16 | |
| Descripción | ADC | |
| Fabricantes | Linear | |
| Logotipo |  |
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Features
LTC2333-16
Buffered 8-Channel, 16-Bit, 800ksps
Differential ±10.24V ADC with
30VP-P Common Mode Range
Description
nn Eight Buffered Multiplexed Channels
nn 800ksps Throughput
nn 500pA/12nA Maximum 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 8-Channel Multiplexer with 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 −110dB THD (Typical) at fIN = 2kHz
nn 128dB CMRR, –125dB Active Crosstalk (Typical)
nn 420ns Step Response (Full-Scale, 0.005% Settling)
nn Rail-to-Rail Input Overdrive Tolerance
nn Programmable Sequencer with No-Latency Control
nn Integrated Reference and Buffer (4.096V)
nn SPI CMOS (1.8V to 5V) and LVDS Serial I/O
nn 268mW Power Dissipation (Typical)
nn 48-Lead (7mm × 7mm) LQFP Package
Applications
nn Direct Sensor Measurement
nn Programmable Logic Controllers
nn Industrial Process Control
nn Test and Measurement
The LTC®2333-16 is a 16-bit, low noise 8-channel multi-
plexed 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 reference
and buffer, this SoftSpan™ ADC can be configured on a
conversion-by-conversion basis to accept ±10.24V, 0V to
10.24V, ±5.12V, or 0V to 5.12V signals on any channel.
Alternately, the ADC may be programmed to cycle through
a sequence of channels and ranges without further user
intervention.
The integrated picoamp-input analog buffers, wide input
common mode range and 128dB CMRR of the LTC2333-
16 allow the ADC to directly digitize a variety of signals
using 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 LTC2333-16 an
ideal choice for many high voltage applications requiring
wide dynamic range.
The LTC2333-16 supports pin-selectable SPI CMOS (1.8V
to 5V) and LVDS serial interfaces.
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
ARBITRARY
+10V
FULLY
DIFFERENTIAL
+5V
0V
–10V
0V
–5V
TRUE BIPOLAR
UNIPOLAR
+10V
+10V
0V 0V
–10V
–10V
DIFFERENTIAL INPUTS IN+/IN– WITH
WIDE INPUT COMMON MODE RANGE
BUFFERS
IN0+
IN0–
VCC
MUX
IN7+
IN7–
VDD VDDLBYP
LTC2333-16
CMOS OR LVDS
I/O INTERFACE
OVDD LVDS/CMOS
PD
16-BIT
SAMPLING
ADC
SDO
SCKO
SCKI
SDI
CS
BUSY
CNV
EIGHT BUFFERED
CHANNELS
VEE REFBUF REFIN GND
0.1µF
–15V
47µF 0.1µF
233316 TA01a
For more information www.linear.com/LTC2333-16
SAMPLE
CLOCK
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
233316 TA01b
233316f
1
1 page  
LTC2333-16
R eference Buffer Ch aracteristics The l denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at TA = 25°C. (Note 9)
SYMBOL
VREFBUF
IREFBUF
PARAMETER
Reference Buffer Output Voltage
REFBUF Voltage Range
REFBUF Input Impedance
REFBUF Load Current
CONDITIONS
REFIN Overdriven, VREFIN = 2.048V
REFBUF Overdriven (Notes 7, 15)
VREFIN = 0V, Buffer Disabled
VREFBUF = 5V, (Notes 15, 16)
VREFBUF = 5V, Acquisition or Nap Mode (Note 15)
MIN
l 4.091
l 2.5
l
TYP
4.096
13
0.93
0.39
MAX
4.101
5
1.2
UNITS
V
V
kΩ
mA
mA
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
CS
=
=
O0VV,DVDICM
=
1.2V
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
For more information www.linear.com/LTC2333-16
233316f
5
5 Page 
LTC2333-16
T ypical Performanc e Characteristics TA = 25°C, VCC = +15V, VEE = –15V, VDD = 5V,
OVDD = 2.5V, Internal Reference and Buffer (VREFBUF = 4.096V), fSMPL = 800ksps, unless otherwise noted.
SNR, SINAD vs Input Level,
fIN = 2kHz
94.8 TRUE BIPOLAR D±R1I0V.E24(IVNR– A=N0GVE)
94.6
94.4 SNR
94.2
SINAD
94.0
93.8
–40
–30 –20 –10
INPUT LEVEL (dBFS)
0
233316 G19
CMRR vs Input Frequency
and Channel
160
±10.24V SOFTSPAN
150 IN+ = IN– = 18VP-P SINE
140 ALL CHANNELS
130
120
110
100
90
80
70
10
100 1k 10k 100k 1M
FREQUENCY (Hz)
233316 G20
Crosstalk vs Input Frequency
and Conversion Sequence
–80
–90
–100
±IIINNN10010+–+.2,==4INV011V8R–V,APIN-NPG2SE+I,NINE2– = 0V
–110
–120
CH0, CH1, CH0, CH1...
–130
–140
CH0, CH2, CH0, CH2...
–150
–160
10
CH1, CH1, CH1, CH1...
100 1k 10k 100k 1M
FREQUENCY (Hz)
233316 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
93.5 SINAD
93.0
92.5
92.0
–55 –35 –15 5 25 45 65 85
TEMPERATURE (°C)
105 125
233316 G22
THD, Harmonics vs Temperature,
fIN = 2kHz
–95 TRUE BIPOLAR D±R1I0V.E24(IVNR– A=N0GVE)
–100
–105
–110
–115
–120
THD
2ND
3RD
–125
–55 –35 –15 5 25 45 65 85
TEMPERATURE (°C)
105 125
233316 G23
INL, DNL vs Temperature
1.00
0.75
TRUE BIPOLAR D±R1I0V.E24(IVNR– A=N0GVE)
0.50
0.25
MAX DNL
0
MAX INL
–0.25
–0.50
MIN INL
MIN DNL
–0.75
–1.00
–55 –35 –15 5 25 45 65 85
TEMPERATURE (°C)
105 125
233316 G24
Analog Input Leakage Current vs
Temperature
10k 16 ANALOG INPUT PIN TRACES
FOR EACH INPUT VOLTAGE
1k
VIN = 0V
VIN = 10V
VIN = –10V
100
10
1
0.1
–55 –35 –15 5 25 45 65 85
TEMPERATURE (°C)
105 125
233316 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
233316 G26
Negative 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
233316 G27
For more information www.linear.com/LTC2333-16
233316f
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| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LTC2333-16.PDF ] | |
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