Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

SP9843KS Datasheet(PDF) 7 Page - Sipex Corporation

Part # SP9843KS
Description  8-Bit Octal, 4-Quadrant Multiplying, BiCMOS DAC
Download  10 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  SIPEX [Sipex Corporation]
Direct Link  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP9843KS Datasheet(HTML) 7 Page - Sipex Corporation

Back Button SP9843KS Datasheet HTML 2Page - Sipex Corporation SP9843KS Datasheet HTML 3Page - Sipex Corporation SP9843KS Datasheet HTML 4Page - Sipex Corporation SP9843KS Datasheet HTML 5Page - Sipex Corporation SP9843KS Datasheet HTML 6Page - Sipex Corporation SP9843KS Datasheet HTML 7Page - Sipex Corporation SP9843KS Datasheet HTML 8Page - Sipex Corporation SP9843KS Datasheet HTML 9Page - Sipex Corporation SP9843KS Datasheet HTML 10Page - Sipex Corporation  
Zoom Inzoom in Zoom Outzoom out
 7 / 10 page
background image
263
a)
b)
Figure 2. a) Inverted Single–Quadrant Operation; b) 4–Quadrant Operation
Applications which require two–quadrant operation
with respect to pseudoground should use the SIPEX
SP9841orSP9842two–quadrantmultiplyingDACs.
The choice of voltage to use for the pseudoground is
limitedbythelegalvoltageswingattheopampoutput.
The op amp exhibits excellent linearity for output
voltages between, conservatively, 100mV and V
DD
1.5V. The op amp BiCMOS output stage consists of
annpnfollowerloadedbyanNMOScommonsourced
to ground. This circuit exhibits wide bandwidth and
can source large currents, while retaining the capabil-
ity of driving the output to voltages close to ground.
At output voltages below 25mV, feedback forces
some op amp internal nodes toward the supply
rails. The NMOS pull–down device gets driven
hard and the NMOS device enters the linear
region — it begins to function in the same
manner as a 50 ohm resistor. In reality, the
wideband amplifier output stage sinks some
internal quiescent current even when driving the
output towards ground. This sunk current drops
across the output stage NMOS transistor ON–
resistance and internal routing resistance to pro-
vide a minimum output voltage below which the
amplifier cannot drive. This minimum voltage
is in the 15 to 25mV range. It varies within a
package with each op amp's offset voltage and
biasing variations. If an input voltage lower than
this minimum, such as code 255 when V
IN(X) is
grounded, is requested, feedback within the op
amp circuit will force internal nodes to the rails,
while the output will remain saturated near this
minimum value. Non–saturated monotonic be-
havior returns between 25mV and 100mV at the
output, but full open loop gain and linearity are
not apparent until the output voltage is nearly
100mV above the negative supply. Four–quad-
rant (programmable signed attenuator) applica-
tions usually bias V
REFL
up at system
pseudoground, well above this saturation re-
gion, and therefore maintain linearity even at
high attenuations (i.e. near code 80
HEX).
Driving the Reference Inputs
The eight independent V
IN inputs of the SP9840, and
the four–pair of inputs in the SP9843, exhibit a code–
dependent input resistance, as shown in the specifica-
tions, and as a typical graph. In general, these inputs
should be driven by an amplifier capable of handling
Table 2. Logic Control Input Truth Table.
SDI
CLK
LOADH
PRESETL
LOGIC OPERATION
X
L
L
H
No Change
Data
L
H
Shift In One Bit from SDI
Shift Out 12–clock delayed data at SDO
X
X
X
L
All DAC Registers Preset to 80
H (Note 1)
X
L
H
H
Load Serial Register Data into DAC(X) Register
Note 1: "Preset" may not persist at all DACs if LOADH is high when PRESETL returns high.


Similar Part No. - SP9843KS

ManufacturerPart #DatasheetDescription
logo
Sipex Corporation
SP9841 SIPEX-SP9841 Datasheet
738Kb / 32P
   8-Bit Octal, 2-Quadrant Multiplying, BiCMOS DAC
SP9841BN SIPEX-SP9841BN Datasheet
738Kb / 32P
   8-Bit Octal, 2-Quadrant Multiplying, BiCMOS DAC
SP9841BS SIPEX-SP9841BS Datasheet
738Kb / 32P
   8-Bit Octal, 2-Quadrant Multiplying, BiCMOS DAC
SP9841KN SIPEX-SP9841KN Datasheet
738Kb / 32P
   8-Bit Octal, 2-Quadrant Multiplying, BiCMOS DAC
SP9841KS SIPEX-SP9841KS Datasheet
738Kb / 32P
   8-Bit Octal, 2-Quadrant Multiplying, BiCMOS DAC
More results

Similar Description - SP9843KS

ManufacturerPart #DatasheetDescription
logo
Sipex Corporation
SP9841 SIPEX-SP9841 Datasheet
738Kb / 32P
   8-Bit Octal, 2-Quadrant Multiplying, BiCMOS DAC
logo
Analog Devices
DAC8841 AD-DAC8841 Datasheet
594Kb / 10P
   8 BIT OCTAL 2-QUADRANT MULTIPLYING CMOS TRIM DAC
REV. A
AD8842ARZ AD-AD8842ARZ Datasheet
1Mb / 13P
   8-Bit Octal, 4-Quadrant Multiplying, CMOS TrimDAC
REV. A
DAC8840 AD-DAC8840 Datasheet
513Kb / 12P
   8-Bit Octal, 4-Quadrant Multiplying, CMOS TrimDAC
REV. A
AD8842ARZ AD-AD8842ARZ Datasheet
1Mb / 13P
   8-Bit Octal, 4-Quadrant Multiplying, CMOS TrimDAC
REV. A
AD8842 AD-AD8842_15 Datasheet
1Mb / 13P
   8-Bit Octal, 4-Quadrant Multiplying, CMOS TrimDAC
REV. A
AD8842 AD-AD8842 Datasheet
506Kb / 12P
   8-Bit Octal, 4-Quadrant Multiplying, CMOS TrimDAC
REV. 0
DAC8841 AD-DAC8841_13 Datasheet
587Kb / 12P
   8-Bit Octal, 2-Quadrant Multiplying, CMOS TrimDAC
REV. A
DAC-8841 AD-DAC-8841 Datasheet
584Kb / 12P
   8-Bit Octal, 2-Quadrant Multiplying, CMOS TrimDAC
REV. A
AD7524 AD-AD7524_15 Datasheet
165Kb / 8P
   8-Bit Buffered Multiplying DAC
REV. B
More results


Html Pages

1 2 3 4 5 6 7 8 9 10


Datasheet Download

Go To PDF Page


Link URL




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

About Alldatasheet   |   Advertisement   |   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