Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

LTC6253 Datasheet(PDF) 34 Page - Linear Technology

Part # LTC6253
Description  Octal, 18-Bit, 200ksps Differential SoftSpan ADC with Wide Input Common Mode Range
Download  40 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC6253 Datasheet(HTML) 34 Page - Linear Technology

Back Button LTC6253 Datasheet HTML 30Page - Linear Technology LTC6253 Datasheet HTML 31Page - Linear Technology LTC6253 Datasheet HTML 32Page - Linear Technology LTC6253 Datasheet HTML 33Page - Linear Technology LTC6253 Datasheet HTML 34Page - Linear Technology LTC6253 Datasheet HTML 35Page - Linear Technology LTC6253 Datasheet HTML 36Page - Linear Technology LTC6253 Datasheet HTML 37Page - Linear Technology LTC6253 Datasheet HTML 38Page - Linear Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 34 / 40 page
background image
LTC2345-18
34
234518f
For more information www.linear.com/LTC2345-18
channels 0 and 1, 2 and 3, 4 and 5, and 6 and 7, respec-
tively,usingfouroutputlanes.Similarly,capturingthefirst
four packets (96 SCKI cycles total) from SDO0 and SDO4
provides data for analog input channels 0 to 3 and 4 to
7, respectively, using two output lanes. If only one lane
can be accommodated, capturing the first eight packets
(192 SCKI cycles total) from SDO0 provides data for all
analog input channels. As shown in Table 3, full 200ksps
per channel throughput can be achieved with a 90MHz
SCKI frequency in the four lane case, but the maximum
CMOS SCKI frequency of 100MHz limits the throughput
to less than 200ksps per channel in the two lane and one
lane cases. Finally, note that in choosing the number of
lanes and which lanes to use for data capture, the user is
notrestrictedtothespecificcasesmentionedabove.Other
choices may be more optimal in particular applications.
Programming the SoftSpan Configuration Register in
CMOS I/O Mode
The internal 24-bit SoftSpan configuration register con-
trols the SoftSpan range for all analog input channels of
the LTC2345-18. The default state of this register after
power-up or resetting the device is all ones, configuring
each channel to convert in SoftSpan 7, the ± VREFBUFrange
(see Table 1a). The state of this register may be modified
by providing a new 24-bit SoftSpan configuration word on
SDI during the data transaction window shown in Figure
17. New SoftSpan configuration words are only accepted
within this recommended data transaction window, but
SoftSpan changes take effect immediately with no addi-
tional analog input settling time required before starting
the next conversion. Setting a channel’s SoftSpan code to
SS[2:0] = 000 immediately disables the channel, resulting
in a corresponding reduction in tCONV on the next conver-
sion. Similarly, enabling a previously disabled channel
requires no additional analog input settling time before
starting the next conversion. The mapping between the
serial SoftSpan configuration word, the internal SoftSpan
configuration register, and each channel’s 3-bit SoftSpan
code is illustrated in Figure 19.
If fewer than 24 SCKI rising edges are provided during a
data transaction window, the partial word received on SDI
willbeignoredandtheSoftSpanconfigurationregisterwill
notbeupdated.Ifexactly24SCKIrisingedgesareprovided,
the SoftSpan configuration register will be updated to
match the received SoftSpan configuration word, S[23:0].
The one exception to this behavior occurs when S[23:0] is
all zeros. In this case, the SoftSpan configuration register
will not be updated, allowing applications to retain the
current SoftSpan configuration state by idling SDI low. If
more than 24 SCKI rising edges are provided during a data
transaction window, each complete 24-bit word received
on SDI will be interpreted as a new SoftSpan configuration
word and applied to the SoftSpan configuration register
as described above. Any partial words are ignored.
Typically, applications will update the SoftSpan configura-
tion register in the manner shown in Figures 17 and 18.
After the opening of a new data transaction window at the
falling edge of BUSY, the user supplies a 24-bit SoftSpan
configuration word on SDI during the first 24 SCKI cycles.
Thisnewwordoverwritestheinternalconfigurationregister
applicaTions inForMaTion
Table 3. Required SCKI Frequency to Achieve Various Throughputs in Common Output Bus Configurations with Eight Channels
Enabled. Shaded Entries Denote Throughputs That Are Not Achievable In a Given Configuration. Calculated Using fSCKI = (Number of
SCKI Cycles)/(tACQ,MIN – tQUIET)
I/O MODE
NUMBER OF SDO
LANES
NUMBER OF SCKI
CYCLES
REQUIRED fSCKI (MHz) TO ACHIEVE THROUGHPUT OF
200ksps/CHANNEL
(tACQ = 565ns)
100ksps/CHANNEL
(tACQ = 5565ns)
50ksps/CHANNEL
(tACQ = 15565ns)
CMOS
8
18
35
4
2
8
24
45
5
2
4
48
90
9
4
2
96
Not Achievable
18
7
1
192
Not Achievable
35
13
LVDS
1
96
180 (360Mbps)
18 (36Mbps)
7 (14Mbps)


Similar Part No. - LTC6253

ManufacturerPart #DatasheetDescription
logo
Linear Technology
LTC6253 LINER-LTC6253 Datasheet
1Mb / 20P
   90MHz, 2200V/關s 30V Low Power Op Amps
LTC6253 LINER-LTC6253 Datasheet
1Mb / 40P
   Octal, 16-Bit, 200ksps Differential SoftSpan ADC with Wide Input Common Mode Range
LTC6253 LINER-LTC6253 Datasheet
1Mb / 18P
   2GHz, 3.5mA Gain of 7 Stable Rail-to-Rail I/O Dual Op Amp
LTC6253 LINER-LTC6253 Datasheet
700Kb / 30P
   280MHz, 2.9ns Comparator Family with Rail-to-Rail Inputs and CMOS Outputs
logo
Analog Devices
LTC6253 AD-LTC6253 Datasheet
2Mb / 28P
   1nV/?숰z 420MHz GBW, 180V/關s, Low Distortion Rail-to-Rail Output Op Amps
More results

Similar Description - LTC6253

ManufacturerPart #DatasheetDescription
logo
Linear Technology
LTC2348-18 LINER-LTC2348-18_15 Datasheet
3Mb / 42P
   Octal, 18-Bit, 200ksps Differential 10.24V Input SoftSpan ADC with Wide Input Common Mode Range
LTC2348-18 LINER-LTC2348-18 Datasheet
1Mb / 40P
   Octal, 18-Bit, 200ksps Differential 짹10.24V Input SoftSpan ADC with Wide Input Common Mode Range
LTC2345-16 LINER-LTC2345-16 Datasheet
1Mb / 40P
   Octal, 16-Bit, 200ksps Differential SoftSpan ADC with Wide Input Common Mode Range
LTC2348-16 LINER-LTC2348-16 Datasheet
1Mb / 40P
   Octal, 16-Bit, 200ksps Differential 짹10.24V Input SoftSpan ADC with Wide Input Common Mode Range
LTC2335-18 LINER-LTC2335-18 Datasheet
2Mb / 40P
   18-Bit, 1Msps 8-Channel Differential 짹10.24V Input SoftSpan ADC with Wide Input Common Mode Range
LTC2335-16 LINER-LTC2335-16 Datasheet
2Mb / 40P
   16-Bit, 1Msps 8-Channel Differential 짹10.24V Input SoftSpan ADC with Wide Input Common Mode Range
LTC2311-16 LINER-LTC2311-16 Datasheet
885Kb / 26P
   16-Bit, 5Msps Differential Input ADC with Wide Input Common Mode Range
LTC2358-16 LINER-LTC2358-16 Datasheet
3Mb / 40P
   Buffered Octal, 16-Bit, 200ksps/Ch Differential 짹10.24V ADC with 30VP-P Common Mode Range
LTC2321-16 LINER-LTC2321-16_15 Datasheet
1,012Kb / 26P
   Dual, 16-Bit, 2Msps Differential Input ADC with Wide Input Common Mode Range
LTC2323-16 LINER-LTC2323-16_15 Datasheet
1Mb / 26P
   Dual, 16-Bit, 5Msps Differential Input ADC with Wide Input Common Mode Range
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com