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参数资料
| 型号： | E6420-EDGE6420 |
| 英文描述： | Per-Pin Electronics Companion DAC |
| 中文描述： | 按针脚电子伴侣援 |
| 文件页数： | 8/29页 |
| 文件大小： | 244K |
| 代理商： | E6420-EDGE6420 |
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16
2000 Semtech Corp.
www .semtech.com
HIGH-PERFORMANCE PRODUCTS – ATE
Edge6420
Application Information (continued)
Figure 7. Required External Resistors and Components
VOUT_CH0_0
VOUT_CH0_1
VOUT_CH0_2
IOUT_CH0_1
IOUT_CH0_4
VOUT_CH0_8
VOUT_CH0_9
VOUT_CH0_10
DAC
Voltage
Outputs
VREF
DVDD
DGND
AGND
VEE
Edge6420
AVCC
AVDD
+15.5V
SGND
0V
+5V
–5V
0V
+5V
2.5V
AGND
..
.
..
.
DAC
Current
Outputs
..
.
..
.
Loading
Requirement:
10 nF to 100 nF
Loading
Requirement:
1 nF (see below)
Loading
Requirement:
1 nF (see below)
Loading
Requirement:
10 nF to 100 nF
Note: All unused
voltage outputs must have
an external capacitor
attached (between
10 nF and 100 nF).
I
REF
R_MASTER
R_GAIN_A
I
REF
R_OFFSET_A
I
REF
R_GAIN_B
I
REF
R_OFFSET_B
I
REF
R_GAIN_C
I
REF
R_OFFSET_C
I
REF
R_GAIN_D
I
REF
R_OFFSET_D
I
REF
I
REF_E
I
REF_F
R_GAIN_E
R_GAIN_F
For Group A
DACs
Gain and
Offset Control
For Group B
DACs
Gain and
Offset Control
For Group C
DACs
Gain and
Offset Control
For Group D
DACs
Gain and
Offset Control
AGND
The Selection of
R_MASTER
Establishes I
REF
+
–
Loading Requirements
Voltage Outputs
All voltage outputs (denoted VOUT_CH[0:3]_[0:10]) require
a load capacitance between 10 nF and 100 nF for stability.
Current Outputs
All current outputs require capacitive loading; the amount
of loading needed to ensure stability is dependent on the
impedance that the current outputs of the 6420 drive.
For impedances of 1.3 K
to 1.6 K, such as what is
seen at the E720 current inputs (ISK, ISRC, IBIAS, RADJ,
and FADJ), it is recommended that 1 nF be used.
Caution on Exceeding Compliance Limits on Current
Output DACs
Current output DACs (i.e., Group E and F DACs) can exhibit
a “lock-up” condition in situations when the actual voltage
seen at the outputs of these DACs exceeds the compliance
limits in the specification. Care should be taken in the
design of circuits being driven by Group E and F outputs
to ensure compliance limits stated in the specifications
are not exceeded.
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