AD5424_15 Datasheet, PDF (14/29 Pages) Analog Devices – 8-/10-/12-Bit, High Bandwidth Multiplying DACs with Parallel Interface

Data Sheet
14
T_A = 25°C
LOADING ZS TO FS
12
10
V_DD = 5V
8
6
4
V_DD = 3V
V_DD = 2.5V
2
0
1
10 100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
Figure 27. Supply Current vs. Update Rate
6
0 T_A = 25°C
–6 LOADING
–12 ^{ZS TO FS}
–18
–24
–30
–36
–42
–48
–54
–60
–66
–72
–78
–84
–90
–96
–102
1
10
ALL ON
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
ALL OFF
100 1k
T_A = 25°C
V_DD = 5V
V_REF = ±3.5V
INPUT
C_COMP = 1.8pF
AD8038 AMPLIFIER
AD5445 DAC
10k 100k 1M 10M 100M
FREQUENCY (Hz)
Figure 28. Reference Multiplying Bandwidth vs. Frequency and Code
3
T_A = 25°C
V_DD = 5V
AD5445
0
AD5424/AD5433/AD5445
–3
–6
–9
10k
V_REF = ±2V, AD8038 C_C 1.47pF
V_REF = ±2V, AD8038 C_C 1pF
V_REF = ±0.15V, AD8038 C_C 1pF
V_REF = ±0.15V, AD8038 C_C 1.47pF
V_REF = ±3.51V, AD8038 C_C 1.8pF
100k
1M
FREQUENCY (Hz)
10M
100M
Figure 30. Reference Multiplying Bandwidth vs. Frequency and
Compensation Capacitor
0.045
0.040
0.035
0x7FF TO 0x800
V_DD = 5V
0.030
T_A = 25°C
V_REF = 0V
AD8038 AMPLIFIER
C_COMP = 1.8pF
0.025
0.020
V_DD = 3V
0.015
0.010
0.005
0x800 TO 0x7FF
V_DD = 3V
0
–0.005
–0.010
0
V_DD = 5V
20 40 60 80 100 120 140 160 180 200
TIME (ns)
Figure 31. Midscale Transition, VREF = 0 V
0.2
0
–0.2
–0.4
–0.6
T_A = 25°C
V_DD = 5V
V_REF = ±3.5V
C_COMP = 1.8pF
AD8038 AMPLIFIER
AD5445 DAC
–0.8
1
10 100 1k
10k 100k 1M 10M 100M
FREQUENCY (Hz)
Figure 29. Reference Multiplying Bandwidth—All 1s Loaded
–1.68
–1.69
–1.70
0x7FF TO 0x800
V_DD = 5V
T_A = 25°C
V_REF = 3.5V
AD8038 AMPLIFIER
C_COMP = 1.8pF
–1.71
–1.72
–1.73
–1.74
–1.75
V_DD = 3V
V_DD = 5V
V_DD = 3V
–1.76
0x800 TO 0x7FF
–1.77
0 20 40 60
80 100 120 140 160 180 200
TIME (ns)
Figure 32. Midscale Transition, VREF = 3.5 V
Rev. D | Page 13 of 28