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参数资料
| 型号： | HI5800BID |
| 厂商： | INTERSIL CORP |
| 元件分类： | ADC |
| 英文描述： | 12-Bit, 3MSPS, Sampling A/D Converter |
| 中文描述： | 1-CH 12-BIT FLASH METHOD ADC, PARALLEL ACCESS, CDIP40 |
| 封装： | SIDE BRAZED, CERAMIC, DIP-40 |
| 文件页数： | 12/15页 |
| 文件大小： | 234K |
| 代理商： | HI5800BID |
12
D/A gain trim (RG
ADJ
) adjusts the tilt of the transfer curve
around the curve midpoint (code 2048). The 10k
potentiometers can be installed to achieve the desired
adjustment in the following manner.
Typically only one of the offset trimpots needs to be used.
The offset should first be adjusted to get code 2048 centered
at a desired DC input voltage such as 0V. Next the gain trim
can be adjusted by trimming the gain pot until the 4094 to
4095 code transition occurs at the desired voltage
(2.500V - 1.5 LSBs for a 2.5V reference). The gain trim can
also be done by adjusting the gain pot until the code 0 to 1
transition occurs at a particular voltage (-2.5V + 0.5 LSBs for
a 2.5V reference). If a nonzero offset is needed, then the
offset pot can be adjusted after the gain trim is finished. The
gain trim is simplified if an offset trim to zero is done first with
a nonzero offset trim done after the gain trim is finished. The
D/A offset and S/H offset trimpots have an identical effect on
the converter except that the S/H offset is a finer resolution
trim. The D/A offset and D/A gain typically have an
adjustment range of
±
30 LSBs and the S/H offset typically
has an adjustment range of
±
20 LSBs.
RO
ADJ
RG
ADJ
10k
10k
V
CC
V
EE
ADJ+
ADJ-
V
EE
10k
FIGURE 19. D/A OFFSET, D/A GAIN AND S/H OFFSET
ADJUSTMENTS
TABLE 1. I/O TRUTH TABLE
INPUTS
OUTPUT
FUNCTION
CS
CONV
OE
A0
IRQ
1
X
X
X
X
No operation.
0
0
X
X
X
Continuous convert mode.
0
X
0
0
X
Outputs all 12-bits and OVF or upper byte D11 - D4 in 8 bit mode.
0
X
0
1
X
In 8-bit mode, outputs lower LSBs D3 - D0 followed by 4 trailing zeroes
and OVF (See text).
0
1
X
X
0
Converter is in acquisition mode.
0
X
X
X
1
Converter is busy doing a conversion.
0
X
1
X
X
Data outputs and OVF in high impedance state.
X’s = Don’t Care
TABLE 2. A/D OUTPUT CODE TABLE
CODE
DESCRIPTION
(NOTE)
INPUT
VOLTAGE
REF
IN
= 2.5V
(V)
OUTPUT DATA (OFFSET BINARY)
MSB
LSB
OVF
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
≥
+FS (Full Scale)
≥
+2.5000
1
1
1
1
1
1
1
1
1
1
1
1
1
+FS - 1 LSB
+
3
/
4
FS
+
1
/
2
FS
+1 LSB
+2.49878
0
1
1
1
1
1
1
1
1
1
1
1
1
+1.8750
0
1
1
1
0
0
0
0
0
0
0
0
0
+1.2500
0
1
1
0
0
0
0
0
0
0
0
0
0
+0.00122
0
1
0
0
0
0
0
0
0
0
0
0
1
0
0.0000
0
1
0
0
0
0
0
0
0
0
0
0
0
-1 LSB
-
1
/
2
FS
-
3
/
4
FS
-FS + 1 LSB
-0.00122
0
0
1
1
1
1
1
1
1
1
1
1
1
-1.2500
0
0
1
0
0
0
0
0
0
0
0
0
0
-1.8750
0
0
0
1
0
0
0
0
0
0
0
0
0
-2.49878
0
0
0
0
0
0
0
0
0
0
0
0
1
≤
-FS
≤
-2.5000
1
0
0
0
0
0
0
0
0
0
0
0
0
NOTE: The voltages listed above represent the ideal center of each output code shown as a function of the reference voltage.
2 (REF
IN
)
4096
LSB =
HI5800
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| HI5800-EV | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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