Datasheet

 2010 Microchip Technology Inc. DS22248A-page 15
MCP4901/4911/4921
Note: Unless otherwise indicated, T
A
= +25°C, V
DD
= 5V, V
SS
= 0V, V
REF
= 2.50V, Gain = 2, R
L
= 5 k, C
L
= 100 pF.
FIGURE 2-35: Multiplier Mode Bandwidth.
FIGURE 2-36: -3 db Bandwidth vs. Worst
Codes.
FIGURE 2-37: Phase Shift.
-12
-10
-8
-6
-4
-2
0
100 1,000
Frequency (kHz)
Attenuation (dB)
D = 160
D = 416
D = 672
D = 928
D = 1184
D = 1440
D = 1696
D = 1952
D = 2208
D = 2464
D = 2720
D = 2976
D = 3232
D = 3488
D = 3744
Figure 2-35 calculation:
Attenuation (dB) = 20 log (V
OUT
/V
REF
) – 20 log (G(D/4096))
400
420
440
460
480
500
520
540
560
580
600
1
6
0
4
1
6
6
7
2
9
2
8
1
1
84
1
4
40
1
6
96
1
9
52
2
2
08
2
4
64
2
7
20
2
9
76
3
2
32
3
4
88
3
7
44
Worst Case Codes (decimal)
Bandwidth (kHz)
G = 1
G = 2
-180
-135
-90
-45
0
100 1,000
Frequency (kHz)
q
VREF
– q
VOUT
D = 160
D = 416
D = 672
D = 928
D = 1184
D = 1440
D = 1696
D = 1952
D = 2208
D = 2464
D = 2720
D = 2976
D = 3232
D = 3488
D = 3744