LTC1606AC 데이터 시트보기 (PDF) - Linear Technology
부품명
상세내역
일치하는 목록
LTC1606AC Datasheet PDF : 16 Pages
| |||
LTC1606
APPLICATIO S I FOR ATIO
changing between 1111 1111 1111 1111 and 0000 0000
0000 0000. The gain error is trimmed by adjusting resistor
R4. An input voltage of 9.999542V (+FS – 1.5LSB) is
applied to VIN and R4 is adjusted until the output code is
changing between 0111 1111 1111 1110 and 0111 1111
1111 1111. Figure 6 shows the bipolar transfer character-
istic of the LTC1606.
±10V INPUT
200Ω
1%
33.2k
1%
100k
5V
R4
50k
R3
50k
1
2
VIN
AGND1
+ 2.2µF
3 REF
LTC1606
392k
+
4
CAP
10µF
5
AGND2
1606 • F05
Figure 5. ±10V Input with Offset and Gain Trim
If the external resistors are not used, the resulting offset
and gain error ranges are shown in Table 1.
DC Performance
One way of measuring the transition noise associated with
a high resolution ADC is to use a technique where a DC
signal is applied to the input of the ADC and the resulting
output codes are collected over a large number of conver-
sions. For example in Figure 7, the distribution of output
code is shown for a DC input that has been digitized 4096
times. The distribution is Gaussian and the RMS code
transition is about 0.65LSB.
DIGITAL INTERFACE
Internal Clock
The ADC has an internal clock that is trimmed to achieve
a typical conversion time of 2.3µs. No external adjust-
ments are required and, with the typical acquisition time of
1µs, throughput performance of 250ksps is assured.
011...111
011...110
000...001
000...000
111...111
111...110
BIPOLAR
ZERO
100...001
100...000
FS = 20V
1LSB = FS/65536
– FS/2
–1 0V 1
LSB LSB
INPUT VOLTAGE (V)
FS/2 – 1LSB
1606 • F06
Figure 6. LTC1606 Bipolar Transfer Characteristics
2500
2000
1500
1000
500
0
–3 –2 –1 0 1 2 3 4
CODE
1606 • F07
Figure 7. Histogram for 4096 Conversions
10
Table 1
ERROR TERM
Offset Error
+ Full-Scale Error
– Full-Scale Error
WITH BOTH EXTERNAL
RESISTORS INCLUDED
– 10mV < Error < 10mV
– 0.25% < Error < 0.25%
– 0.50% < Error < 0.50%
– 0.25% < Error < 0.25%
– 0.50% < Error < 0.50%
WITHOUT THE EXTERNAL
33.2k RESISTOR
10mV < Error< 55mV
– 1.3% < Error < –0.10%
0.25% < Error < 1.40%
WITHOUT EITHER EXTERNAL
RESISTOR INCLUDED
54mV < Error < 155mV
– 3.40% < Error < –0.85%
2.10% < Error < 6.15%
1606fa
Share Link: 