Datasheet

REV. B
–3–
AD7663
TIMING SPECIFICATIONS
Parameter Symbol Min Typ Max Unit
Refer to Figures 11 and 12
Convert Pulsewidth t
1
5ns
Time between Conversions t
2
4µs
CNVST LOW to BUSY HIGH Delay t
3
30 ns
BUSY HIGH All Modes Except in t
4
1.25 µs
Master Serial Read after Convert Mode
Aperture Delay t
5
2ns
End of Conversion to BUSY LOW Delay t
6
10 ns
Conversion Time t
7
1.25 µs
Acquisition Time t
8
2.75 µs
RESET Pulsewidth t
9
10 ns
Refer to Figures 13, 14, 15, and 16 (Parallel Interface Modes)
CNVST LOW to DATA Valid Delay t
10
1.25 µs
DATA Valid to BUSY LOW Delay t
11
20 ns
Bus Access Request to DATA Valid t
12
40 ns
Bus Relinquish Time t
13
515ns
Refer to Figures 17 and 18 (Master Serial Interface Modes)
1
CS LOW to SYNC Valid Delay t
14
10 ns
CS LOW to Internal SCLK Valid Delay t
15
10 ns
CS LOW to SDOUT Delay t
16
10 ns
CNVST LOW to SYNC Delay (Read during Convert) t
17
0.5 µs
SYNC Asserted to SCLK First Edge Delay
2
t
18
4ns
Internal SCLK Period
2
t
19
25 40 ns
Internal SCLK HIGH
2
t
20
15 ns
Internal SCLK LOW
2
t
21
9.5 ns
SDOUT Valid Setup Time
2
t
22
4.5 ns
SDOUT Valid Hold Time
2
t
23
2ns
SCLK Last Edge to SYNC Delay
2
t
24
3ns
Parameter Conditions Min Typ Max Unit
TEMPERATURE RANGE
8
Specified Performance T
MIN
to T
MAX
–40 +85 °C
NOTES
1
LSB means least significant bit. With the ±5 V input range, one LSB is 152.588 µV.
2
See Definition of Specifications section. These specifications do not include the error contribution from the external reference.
3
All specifications in dB are referred to a full-scale input FS. Tested with an input signal at 0.5 dB below full scale, unless otherwise specified.
4
The max should be the minimum of 5.25 V and DVDD + 0.3 V.
5
Tested in Parallel Reading Mode.
6
Tested with the 0 V to 5 V range and V
IN
– V
INGND
= 0 V. See Power Dissipation section.
7
With OVDD below DVDD + 0.3 V and all digital inputs forced to DVDD or DGND, respectively.
8
Contact factory for extended temperature range.
Specifications subject to change without notice.
Table I. Analog Input Configuration
Input Voltage Input
Range IND(4R) INC(4R) INB(2R) INA(R) Impedance
1
±4 REF
2
V
IN
INGND INGND REF 5.85 kW
±2 REF V
IN
V
IN
INGND REF 3.41 kW
±REF V
IN
V
IN
V
IN
REF 2.56 kW
0 V to 4 REF V
IN
V
IN
INGND INGND 3.41 kW
0 V to 2 REF V
IN
V
IN
V
IN
INGND 2.56 kW
0 V to REF V
IN
V
IN
V
IN
V
IN
Note 3
NOTES
1
Typical analog input impedance.
2
With REF = 3 V, in this range, the input should be limited to –11 V to +12 V.
3
For this range the input is high impedance.
(–40C to +85C, AVDD = DVDD = 5 V, OVDD = 2.7 V to 5.25 V, unless otherwise noted.)