ad7886kp Analog Devices, Inc., ad7886kp Datasheet - Page 3

• Manufacturer Part Number: ad7886kp
• Description: Lc2mos 12-bit, 750 Khz/1 Mhz, Sampling Adc
• Manufacturer: Analog Devices, Inc.

REV. B
Figure 1. Load Circuit for Bus Access and Relinquish Time
ABSOLUTE MAXIMUM RATINGS
(T
V
V
AGND to DGND . . . . . . . . . . . . . . . . . –0.3 V to V
TIMING CHARACTERISTICS
Parameter
t
t
t
t
t
t
t
t
t
t
t
t
t
t
NOTES
1
2
3
Specifications subject to change without notice.
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD7886 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
Timing specifications in bold print are 100% production tested. All other times are sample tested at +25 C to ensure compliance. All input signals are specified with tr =
t
t
1
2
3
4
5
6
7
8
9
10
11
12
13
CONV
tf = 5 ns (10% to 90% of 5 V) and timed from a voltage level of 1.6 V.
lated back to remove the effects of charging or discharging the load capacitor, C
relinquish times of the part and as such are independent of external bus loading capacitances.
6
7
DD
SS
3
3
A
is measured with the load circuit of Figure 1 and defined as the time required for an output to cross 0.8 V or 2.4 V.
and t9 are derived from the measured time taken by the data outputs to change by 0.5 V when loaded with the circuit of Figure 1. The measured number is then extrapo-
= +25 C unless otherwise noted)
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to –7 V
TO OUTPUT
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
PIN
Limit at
T
(J, K Versions) (B Version)
50
1
0
0
60
100
57
10
50
20
10
10
100
0
0
250
1.333
950
1000
MIN
, T
MAX
C
L
Limit at
T
50
1
0
0
60
100
57
10
50
20
10
10
100
0
0
250
1.333
950
1000
MIN
1, 2
, T
I
I
1
OL
OH
MAX
(V
DD
= +5 V
Limit at
T
(T Version) Units
50
1
0
0
75
100
70
10
60
14
0
10
100
0
0
250
1.333
950
1000
MIN
DD
+2.1V
, T
5%, V
+0.3 V
MAX
L
. This means that the times, t
SS
= –5 V
ns typ
ns min CONVST Pulse Width
Fs max
ns min CS to RD Setup Time
ns min CS to RD Hold Time
ns min RD Pulse Width
ns max CONVST to BUSY Propagation Delay, (C
ns max Data Access Time After RD
ns min Bus Relinquish Time After RD
ns max
ns min Data Setup Time Prior to BUSY, (C
ns min Data Setup Time Prior to BUSY, (C
ns min Bus Relinquish Time After CONVST
ns max
ns min CS High to CONVST Low
ns min BUSY High to RD Low
ns typ
ns max
–3–
s min Sampling Interval
VIN1, VIN2, SUM, +5REF to AGND . . . . . . –15 V to +15 V
V
Digital Inputs to DGND
Digital Outputs to DGND
Operating Temperature Range
Storage Temperature Range . . . . . . . . . . . .–65 C to + 150 C
Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . . +300 C
Power Dissipation (Any Package) to +75 C . . . . . . 1000 mW
Derates above +75 C by . . . . . . . . . . . . . . . . . . . . 10 mW/ C
NOTES
1
2
Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only; functional operation
of the device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
If V
positive, exceeding the Absolute Maximum Ratings. If this possibility exists, a
Schottky diode from V
REF
CS, RD, CONVST . . . . . . . . . . . . . . –0.3 V to V
DB0 to DB11, BUSY . . . . . . . . . . . . . –0.3 V to V
Commercial (J, K Versions) . . . . . . . . . . . . . . 0 C to +70 C
Industrial (B Version) . . . . . . . . . . . . . . . . –40 C to +85 C
Extended (T Version) . . . . . . . . . . . . . . . –55 C to +125 C
SS
Conversion Time
Conditions/Comments
BUSY High to CONVST Low, SHA Acquisition Time
5%, AGND = DGND = 0 V)
to AGND . . . . . . . . . . . . . . . . V
is open circuited with V
7
and t
9
SS
, quoted in the timing characteristics are the true bus
to DGND (cathode end to GND) ensures that the
DD
and AGND applied, the V
WARNING!
SS
L
L
–0.3 V to V
= 20 pF)
= 100 pF)
ESD SENSITIVE DEVICE
AD7886
L
SS
= 10 pF)
pin will be pulled
DD
DD
DD
+0.3 V
+0.3 V
+0.3 V