AD7840
1, 2
TIMING CHARACTERISTICS
(V = +5 V ؎ 5%, V = –5 V ؎ 5%, AGND = DGND = 0 V.)
DD
SS
Lim it at TMIN, TMAX
(J, K, A, B Versions)
Lim it at TMIN, TMAX
(S Version)
P aram eter
Units
Conditions/Com m ents
t1
t2
t3
t4
t5
t6
0
0
0
0
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
to
to
Setup T ime
Hold T ime
45
21
10
40
50
150
30
75
75
50
28
15
40
50
200
40
100
100
Pulse Width
Data Valid to
Data Valid to
Pulse Width
to SCLK Falling Edge
SCLK Cycle T ime
Data Valid to SCLK Setup T ime
Data Valid to SCLK Hold T ime
to SCLK Hold T ime
Setup T ime
Hold T ime
t73
t8
t9
t10
t11
NOT ES
1T iming specifications in bold pr int 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.
2See Figures 6 and 8.
3SCLK mark/space ratio is 40/60 to 60/40.
Specifications subject to change without notice.
ABSO LUTE MAXIMUM RATINGS*
O RD ERING GUID E
Integral
VDD to AGND . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
VSS to AGND . . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to –7 V
AGND to DGND . . . . . . . . . . . . . . . . –0.3 V to VDD + 0.3 V
VOUT to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . VSS to VDD
REF OUT to AGND . . . . . . . . . . . . . . . . . . . . . . . 0 V to VDD
REF IN to AGND . . . . . . . . . . . . . . . . –0.3 V to VDD + 0.3 V
Digital Inputs to DGND . . . . . . . . . . . –0.3 V to VDD + 0.3 V
Operating T emperature 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 T emperature Range . . . . . . . . . . . . –65°C to +150°C
Lead T emperature (Soldering, 10 sec) . . . . . . . . . . . . +300°C
Power Dissipation (Any Package) to +75°C . . . . . . . . 450 mW
Derates above +75°C by . . . . . . . . . . . . . . . . . . . . 10 mW/°C
Tem perature
Range
SNR
(dB)
Nonlinearity P ackage
(LSB)
Model1
O ption2
AD7840JN
AD7840KN
AD7840JP
AD7840KP
AD7840AQ
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
–25°C to +85°C
78 min ±2 max
80 min ±1 max
78 min ±2 max
80 min ±1 max
78 min ±2 max
78 min ±2 max
80 min ±1 max
N-24
N-24
P-28A
P-28A
Q-24
RS-24
Q-24
Q-24
AD7840ARS –25°C to +85°C
AD7840BQ
AD7840SQ3
–25°C to +85°C
–55°C to +125°C 78 min ±2 max
NOT ES
1T o order MIL-ST D-883, Class B processed parts, add /883B to part number.
Contact your local sales office for military data sheet and availability.
2N = Plastic DIP; P = Plastic Leaded Chip Carrier; Q = Cerdip.
3T his grade will be available to /883B processing only.
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. T his 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.
CAUTIO N
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. T herefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
REV. B
–3–