ADSP-BF516KSWZ-3(RevD) View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
ADSP-BF516KSWZ-3 Datasheet PDF : 68 Pages
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ADSP-BF512/BF514/BF514F16/BF516/BF518/BF518F16
60
50
40
30
20
10
0
–10
–20
–30
–40
–50
–60
0
0.5
1.0
VDDEXT = 3.6V @ – 40°C
VDDEXT = 3.3V @ 25°C
V = 3.0V @ 105°C
DDEXT
VOL
1.5
2.0
2.5
3.0
3.5
SOURCE VOLTAGE (V)
Figure 51. Driver Type E Current (3.3V VDDEXT/VDDMEM)
40
VDDEXT = 2.75V @ – 40°C
30
VDDEXT = 2.5V @ 25°C
VDDEXT = 2.25V @ 105°C
20
10
0
–10
VOL
–20
–30
–40
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
SOURCE VOLTAGE (V)
Figure 52. Driver Type E Current (2.5V VDDEXT/VDDMEM)
20
VDDEXT = 1.9V @ – 40°C
15
V = 1.8V @ 25°C
DDEXT
V = 1.7V @ 105°C
DDEXT
10
5
0
–5
VOL
–10
–15
–20
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
SOURCE VOLTAGE (V)
Figure 53. Driver Type E Current (1.8V VDDEXT/VDDMEM)
TEST CONDITIONS
All timing parameters appearing in this data sheet were mea-
sured under the conditions described in this section. Figure 54
shows the measurement point for ac measurements (except out-
put enable/disable). The measurement point VMEAS is VDDEXT/2
or VDDMEM/2 for VDDEXT/VDDMEM (nominal) = 1.8 V/2.5 V/3.3 V.
INPUT
OR
OUTPUT
VMEAS
VMEAS
Figure 54. Voltage Reference Levels for AC
Measurements (Except Output Enable/Disable)
Output Enable Time Measurement
Output signals are considered to be enabled when they have
made a transition from a high impedance state to the point
when they start driving.
The output enable time tENA is the interval from the point when
a reference signal reaches a high or low voltage level to the point
when the output starts driving as shown on the right side of
Figure 55.
tDIS
VOH
(MEASURED)
VOL
(MEASURED)
REFERENCE
SIGNAL
tDIS_MEASURED
tENA
VOH (MEASURED) - ΔV
VOL (MEASURED) + ΔV
tDECAY
tENA_MEASURED
VOH(MEASURED)
VTRIP(HIGH)
VTRIP(LOW)
VOL(MEASURED)
tTRIP
OUTPUT STOPS DRIVING
OUTPUT STARTS DRIVING
HIGH IMPEDANCE STATE
Figure 55. Output Enable/Disable
The time tENA_MEASURED is the interval from when the reference
signal switches to when the output voltage reaches VTRIP(high)
or VTRIP(low). For VDDEXT (nominal) = 1.8 V, VTRIP (high) is
0.95 V, and VTRIP (low) is 0.85 V. For VDDEXT (nominal) = 2.5 V,
VTRIP (high) is 1.3 V and VTRIP (low) is 1.2 V. For VDDEXT (nomi-
nal) = 3.3 V, VTRIP (high) is 1.7 V, and VTRIP (low) is 1.6 V. Time
tTRIP is the interval from when the output starts driving to when
the output reaches the VTRIP(high) or VTRIP(low) trip voltage.
Time tENA is calculated as shown in the equation:
tENA = tENA_MEASURED – tTRIP
If multiple signals (such as the data bus) are enabled, the mea-
surement value is that of the first signal to start driving.
Rev. D | Page 54 of 68 | April 2014
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