AD9287BCPZRL-100 AD [Analog Devices], AD9287BCPZRL-100 Datasheet - Page 27
AD9287BCPZRL-100
Manufacturer Part Number
AD9287BCPZRL-100
Description
Quad, 8-Bit, 100 MSPS Serial LVDS 1.8 V A/D Converter
Manufacturer
AD [Analog Devices]
Datasheet
1.AD9287BCPZRL-100.pdf
(52 pages)
- Current page: 27 of 52
- Download datasheet (2Mb)
External Reference Operation
The use of an external reference may be necessary to enhance
the gain accuracy of the ADC or improve thermal drift charac-
teristics. Figure 58 shows the typical drift characteristics of the
internal reference in 1 V mode.
When the SENSE pin is tied to AVDD, the internal reference is
disabled, allowing the use of an external reference. The external
reference is loaded with an equivalent 6 kΩ load. An internal
reference buffer generates the positive and negative full-scale
references, REFT and REFB, for the ADC core. Therefore, the
external reference must be limited to a nominal of 1.0 V.
–30
–10
–15
–20
–25
–5
5
0
0
0.5
Figure 57. V
1.0
CURRENT LOAD (mA)
1.5
REF
Error vs. Load
2.0
2.5
3.0
3.5
Rev. 0 | Page 27 of 52
–0.05
–0.10
–0.15
–0.20
0.20
0.15
0.10
0.05
0
–40
Figure 58. V
–20
0
REF
TEMPERATURE (°C)
Error vs. Temperature
20
40
60
AD9287
80
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