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): 29/29頁
文件大?。?/td> 244K
代理商: E6420-EDGE6420
9
2000 Semtech Corp.
www .semtech.com
HIGH-PERFORMANCE PRODUCTS – ATE
Edge6420
Circuit Description (continued)
Offset
The typical offset for each current DAC is governed by the
following equations:
Equation 6.
IOFFSET_F = 0
Group E DACs
There are 2 Group E DACs/channel. Group E DACs are
characterized by:
Current outputs (current flows out of the chip)
13 bit resolution
Fixed offset (–128 * LSB typical)
Adjustable full scale range (but < 3.6 mA).
The output current equation for Group E DACs is:
where:
55 k
≤ R_GAIN_E ≤ 156 k
Note: VREF = 2.5V
Group F DACs
There are 3 Group F DACs/channel. Group F DACs are
characterized by:
Current outputs (current flows out of the chip)
6 bit resolution
Fixed offset (0 typical)
Adjustable full scale range (but < 3.6 mA).
The output current equation for Group F DACs is:
where:
55 k
≤ R_GAIN_F ≤ 156 k
Note: VREF = 2.5V
IOUT_E =–
DATA
*
8192
200
R_GAIN_E
3.125
R_GAIN_E
IOUT_F =
DATA
*
64
200
R_GAIN_F
IOFFSET_E =–
KGE * VREF
*
R_GAIN_E
128
MAX_COUNT_E
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