E6420BBG Semtech, E6420BBG Datasheet - Page 7

• Manufacturer Part Number: E6420BBG
• Manufacturer: Semtech

Specifications of E6420BBG

• Lead Free Status / RoHS Status: Not Compliant

DAC Voltage Output Overview
The output voltage of Group A, B, C, and D DACs is
governed by the following equation:
where:
loaded into the shift register shown in Figure 2.
K
Offset
The offset for each of the voltage DACs is governed by the
following equation:
where:
External Resistors
The recommended resistor values for the above equations
are as follows:
DATA corresponds to the base-10 value of the binary data
HIGH-PERFORMANCE PRODUCTS – ATE
Circuit Description (continued)
G[A:D]
2000 Semtech Corp.
R_MASTER = 100K
R_GAIN_[A:D] = (0.4 to 1.15) * R_MASTER
R_OFFSET_[A:D] = (0.0 to 1.2) * R_MASTER
is a multiplying factor that is fixed, as follows:
K
K
V
K
V
GA
GC
REF
OFFSET
REF
= 4
= 8
= 2.5V
= 2.5V
= 2
Equation 1.
Equation 2.
(0.1% precision)
K
K
GB
GD
= 4
= 4
Minimum / Maximum Output Voltages
See Table 2 for the minimum and maximum possible
voltages of a voltage output.
where:
The most negative voltage possible for the Edge6420 is
–3.5V when VEE = –4.5V.
Resolution
The resolution of the DACs in Groups A, B, C, and D is:
where V
Range
The range of the DACs in Groups A, B, C and D is:
7
T
able 2. Minimum/Maximum Output Voltages
RANGE_[A:D]
V
OFFSET[A:D]
D
M
A
S
C
0
1
B
0
F
S
0
. . .
F F
e
0
t t
H
H
L
n i
S
V
B
g
RANGE_[A:D]
is defined in Equation 4.
is defined in equation 2
Equation 3.
Equation 4.
V
V
O
O
V
U
F F
M
and
_ T
A
S
A [
X
/ 2
T E
[ _
D :
[ _
: A
]
: A
] D
13
(
Edge6420
] D
) V
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