ad7476-ep Analog Devices, Inc., ad7476-ep Datasheet - Page 5

• Manufacturer Part Number: ad7476-ep
• Description: 12-bit Adc In 6-lead Sot-23 Ad7476-ep
• Manufacturer: Analog Devices, Inc.

TIMING SPECIFICATIONS
V
Table 2.
Parameter
f
t
t
t
t
t
t
t
t
t
t
t
1
2
3
4
5
SCLK
CONVERT
QUIET
1
2
3
4
5
6
7
8
POWER-UP
3 V specifications apply from V
Guaranteed by characterization. All input signals are specified with tr = tf = 5 ns (10% to 90% of V
Mark/space ratio for the SCLK input is 40/60 to 60/40.
Measured with the load circuit of Figure 2 and defined as the time required for the output to cross 0.8 V or 2.0 V.
t
remove the effects of charging or discharging the 50 pF capacitor. This means that the time, t
loading.
4
4
5
8
DD
is derived from the measured time taken by the data output to change 0.5 V when loaded with the circuit in Figure 2. The measured number is then extrapolated to
3
= 2.35 V to 5.25 V, T
2
3 V
10
12
16 × t
50
10
10
20
40
70
0.4 × t
0.4 × t
10
10
25
1
Limit at T
SCLK
SCLK
SCLK
A
DD
= T
MIN
5 V
10
12
16 × t
50
10
10
20
20
20
0.4 × t
0.4 × t
10
10
25
1
= 2.35 V to 3.6 V; 5 V specifications apply from V
, T
MIN
MAX
SCLK
to T
SCLK
SCLK
1
MAX
Unit
kHz min
MHz max
ns min
ns min
ns min
ns max
ns max
ns max
ns min
ns min
ns min
ns min
ns max
μs typ
, unless otherwise noted.
Figure 2. Load Circuit for Digital Output Timing Specifications
TO OUTPUT
Description
Minimum CS pulse width
CS to SCLK setup time
Delay from CS until SDATA three-state disabled
Data access time after SCLK falling edge, A version
SCLK low pulse width
SCLK falling edge to SDATA high impedance
Minimum quiet time required between bus relinquish and start of next conversion
Data access time after SCLK falling edge, B version
SCLK high pulse width
SCLK to data valid hold time
SCLK falling edge to SDATA high impedance
Power-up time from full power-down
PIN
50pF
Rev. 0 | Page 5 of 12
C
L
200µA
200µA
DD
= 4.75 V to 5.25 V.
I
I
OL
OH
8
, is the true bus relinquish time of the part and is independent of the bus
DD
) and timed from a voltage level of 1.6 V.
1.6V
AD7476-EP