AD7840
REV. B
–3–
ORDERING GUIDE
Integral
Temperature SNR Nonlinearity Package
Model
1
Range (dB) (LSB) Option
2
AD7840JN 0°C to +70°C 78 min ±2 max N-24
AD7840KN 0°C to +70°C 80 min ±1 max N-24
AD7840JP 0°C to +70°C 78 min ±2 max P-28A
AD7840KP 0°C to +70°C 80 min ±1 max P-28A
AD7840AQ –25°C to +85°C 78 min ±2 max Q-24
AD7840ARS –25°C to +85°C 78 min ±2 max RS-24
AD7840BQ –25°C to +85°C 80 min ±1 max Q-24
AD7840SQ
3
–55°C to +125°C 78 min ±2 max Q-2
4
NOTES
1
To order MIL-STD-883, Class B processed parts, add /883B to part number.
Contact your local sales office for military data sheet and availability.
2
N = Plastic DIP; P = Plastic Leaded Chip Carrier; Q = Cerdip.
3
This grade will be available to /883B processing only.
TIMING CHARACTERISTICS
1, 2
Limit at T
MIN
, T
MAX
Limit at T
MIN
, T
MAX
Parameter (J, K, A, B Versions) (S Version) Units Conditions/Comments
t
1
0 0 ns min CS to WR Setup Time
t
2
0 0 ns min CS to WR Hold Time
t
3
45 50 ns min WR Pulse Width
t
4
21 28 ns min Data Valid to WR Setup Time
t
5
10 15 ns min Data Valid to WR Hold Time
t
6
40 40 ns min LDAC Pulse Width
t
7
50 50 ns min SYNC to SCLK Falling Edge
t
8
3
150 200 ns min SCLK Cycle Time
t
9
30 40 ns min Data Valid to SCLK Setup Time
t
10
75 100 ns min Data Valid to SCLK Hold Time
t
11
75 100 ns min SYNC to SCLK Hold Time
NOTES
1
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 = tf = 5 ns (10% to 90% of 5 V) and timed from a voltage level of 1.6 V.
2
See Figures 6 and 8.
3
SCLK mark/space ratio is 40/60 to 60/40.
Specifications subject to change without notice.
(V
DD
= +5 V 6 5%, V
SS
= –5 V 6 5%, AGND = DGND = 0 V.)
ABSOLUTE MAXIMUM RATINGS*
V
DD
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
V
SS
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to –7 V
AGND to DGND . . . . . . . . . . . . . . . . –0.3 V to V
DD
+ 0.3 V
V
OUT
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . V
SS
to V
DD
REF OUT to AGND . . . . . . . . . . . . . . . . . . . . . . . 0 V to V
DD
REF IN to AGND . . . . . . . . . . . . . . . . –0.3 V to V
DD
+ 0.3 V
Digital Inputs to DGND . . . . . . . . . . . –0.3 V to V
DD
+ 0.3 V
Operating Temperature Range
Commercial (J, K Versions) . . . . . . . . . . . . . . 0°C to +70°C
Industrial (A, B Versions) . . . . . . . . . . . . . . –25°C to +85°C
Extended (S Version) . . . . . . . . . . . . . . . . –55°C to +125°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . +300°C
Power Dissipation (Any Package) to +75°C . . . . . . . . 450 mW
Derates above +75°C by . . . . . . . . . . . . . . . . . . . . 10 mW/°C
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and 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.
WARNING!
ESD SENSITIVE DEVICE
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 AD7840 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.
