AD7741BRZ Datasheet, PDF (4/12 Pages) Analog Devices – Single and Multichannel, Synchronous Voltage-to-Frequency Converters

AD7741/AD7742
TIMING CHARACTERISTICS1, 2, 3
(V_DD = +4.75 V to +5.25 V; V_REF = +2.5 V. All specifications T_MIN to T_MAX unless otherwise noted.)
Parameter
Limit at T_MIN, T_MAX
(B and Y Version)
Units
Conditions/Comments
f_CLKIN
t_HIGH/t_LOW
t₁
t₂
t₃
t₄
6.144
55/45
45/55
9
4
4
t_HIGH ± 5
MHz max
max
min
ns typ
ns typ
ns typ
ns typ
Input Clock Mark/Space Ratio
f_CLOCK Rising Edge to f_OUT Rising Edge
f_OUT Rise Time
f_OUT Fall Time
f_OUT Pulsewidth
NOTES
1_{Guaranteed by design and characterization, not production tested.}
2_{All input signals are specified with tr = tf = 5 ns (10% to 90% of V DD) and timed from a voltage level of (VIL + VIH)/2.}
3_{See Figure 1.}
Specifications subject to change without notice.
t_HIGH
CLKIN
t₄
f_OUT
t₁
t₂
t₃
Figure 1. Timing Diagram
ORDERING GUIDE
Models
AD7741BN
AD7741BR
AD7741YR
AD7742BN
AD7742BR
AD7742YR
Temperature
Ranges
–40°C to +85°C
–40°C to +85°C
–40°C to +105°C
–40°C to +85°C
–40°C to +85°C
–40°C to +105°C
Package
Package
Descriptions Options
Plastic DIP
Small Outline
Small Outline
Plastic DIP
Small Outline
Small Outline
N-8
R-8
R-8
N-16
R-16A
R-16A
ABSOLUTE MAXIMUM RATINGS^{1, 2}
(T_A = +25°C unless otherwise noted)
V_DD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3␣ V to +7 V
Analog Input Voltage to GND . . . . . . . . –5␣ V to V_DD + 0.3 V
Digital Input Voltage to GND . . . . . . . –0.3␣ V to V_DD + 0.3 V
Reference Input Voltage to GND . . . . –0.3 V to V_DD + 0.3 V
f_OUT to GND . . . . . . . . . . . . . . . . . . . . –0.3 V to V_DD + 0.3 V
Operating Temperature Range
Automotive (Y Version) . . . . . . . . . . . . . . –40°C to +105°C
Industrial (B Version) . . . . . . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Plastic DIP Package
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . 450 mW
θ_JA Thermal Impedance (8 Lead) . . . . . . . . . . . . . 125°C/W
θ_JA Thermal Impedance (16 Lead) . . . . . . . . . . . . 117°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
SOIC Package
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . 450 mW
θ_JA Thermal Impedance (8 Lead) . . . . . . . . . . . . . 157°C/W
θ_JA Thermal Impedance (16 Lead) . . . . . . . . . . . . 125°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
NOTES
1_{Stresses above those listed under Absolute Maximum Ratings may cause perma-}
nent 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.
2_{Transient currents of up to 100 mA will not cause SCR latch-up.}
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 AD7741/AD7742 features proprietary ESD protection circuitry, permanent dam-
age may occur on devices subjected to high energy electrostatic discharges. Therefore, proper
ESD precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
–4–
REV. 0