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LTC2602 датащи(PDF) 13 Page - Linear Technology

номер детали LTC2602
подробное описание детали  Dual, 16-Bit, 2Msps Differential Input ADC with Wide Input Common Mode Range
PDF  26 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LTC2602 датащи(HTML) 13 Page - Linear Technology

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LTC2321-16
13
232116fc
For more information www.linear.com/LTC2321-16
applicaTions inForMaTion
need not be set at VREF/2, but at some point within the
VDD rails allowing the alternate input to swing symmetri-
cally around this voltage. If the input signal (AIN+ – AIN–)
swings beyond ±REFOUT/2, valid codes will be generated
by the ADC and must be clamped by the user, if necessary.
Pseudo-Differential Unipolar Input Range
The pseudo-differential unipolar configuration represents
driving one of the analog inputs at ground and applying a
signal to the other AIN pin. In this case, the analog input
swings between ground and VREF yielding unipolar two’s
complement output codes with an ADC span of half of full-
scale. This configuration is illustrated in Figure 6, and the
corresponding transfer function in Figure 7. If the input
signal (AIN+ – AIN–) swings negative, valid codes will be
generated by the ADC and must be clamped by the user,
if necessary.
Figure 6. Pseudo-Differential Unipolar Application Circuit
Figure 7. Pseudo-Differential Unipolar Transfer Function
232116 F07
–VREF
–16384
16383
–32768
32767
VREF
DOTTED REGIONS AVAILABLE
BUT UNUSED
AIN
(AIN+ – AIN–)
ADC CODE
(2’s COMPLEMENT)
–VREF/2
VREF/2
0
25
25
220pF
VREF
0V
VREF
0V
+
–
LTC2321-16
LT1818
232116 F06
SDO1
VBYP1
REFOUT1
CLKOUT
AIN1–
AIN1+
SCK
TO CONTROL
LOGIC
(FPGA, CPLD,
DSP, ETC.)
1µF
10µF



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