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參數(shù)資料
| 型號： | E6420-EDGE6420 |
| 英文描述： | Per-Pin Electronics Companion DAC |
| 中文描述： | 按針腳電子伴侶援 |
| 文件頁數(shù)： | 28/29頁 |
| 文件大?。?/td> | 244K |
| 代理商： | E6420-EDGE6420 |
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8
2000 Semtech Corp.
www .semtech.com
HIGH-PERFORMANCE PRODUCTS – ATE
Edge6420
Circuit Description (continued)
Group A DACs
There are five Group A DACs/channel. Group A DACs have
a centralized offset, gain and range that is independent of
any other group.
Group A DACs are characterized by 13 bit resolution and
their typical outputs are governed by the following equation:
where:
Note: VREF = 2.5V
Group B DACs
There are two Group B DACs/channel.
Group B DACs
have a centralized offset, gain and range that is
independent of any other group.
Group B DACs are characterized by 13 bit resolution and
their typical outputs are governed by the following
equation:.
where:
Note: VREF = 2.5V
Group C DACs
There are two Group C DACs/channel. Group C DACs have
a centralized offset, gain and range that is independent of
any other group'.
Group C DACs are characterized by 13 bit resolution and
their typical outputs are governed by the following equation:
where:
Note: VREF = 2.5V
Group D DACs
There are two Group D DACs/channel. Group D DACs
have a centralized offset, gain and range that is
independent of any other group.
Group D DACs are characterized by 13 bit resolution and
their typical outputs are governed by the following
equation:
where:
Note: VREF = 2.5V
DAC Current Output Overview
The output current of Group E and F DACs is governed by
the following equation:
Equation 5.
where:
DATA corresponds to the base-10 value of the binary data
loaded into the shift resister in Figure 2.
KG[E:F] is a multiplying factor that is fixed, as follows:
KGE = 80
KGF = 80
VREF = 2.5V
MAX_COUNT_E = 8192
MAX_COUNT_F = 64
VOUT_A =
=
*
10
+ VOFFSET_A
VOFFSET_A
R_GAIN_A
R_MASTER
*
DATA
8192
R_OFFSET_A
R_MASTER
5 * .5 –
VOUT_B =
=
*
10
+ VOFFSET_B
VOFFSET_B
R_GAIN_B
R_MASTER
*
DATA
8192
R_OFFSET_B
R_MASTER
5 * .5 –
VOUT_C =
=
*
20
+ VOFFSET_C
VOFFSET_C
R_GAIN_C
R_MASTER
*
DATA
8192
R_OFFSET_C
R_MASTER
5 * .5 –
VOUT_D =
=
*
10
+ VOFFSET_D
VOFFSET_D
R_GAIN_D
R_MASTER
*
DATA
8192
R_OFFSET_D
R_MASTER
5 * .5 –
IOUT_[E:F] =
+ IOFFSET_[E:F]
KG[E:F] * IREF_[E:F] *
DATA
MAX_COUNT_[E:F]
IREF_[E:F] =
VREF
R_GAIN_[E:F]
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