參數(shù)資料
型號(hào)： AD7742BR
廠商： ANALOG DEVICES INC
元件分類： 模擬專用變換器
英文描述： Single and Multichannel, Synchronous Voltage-to-Frequency Converters
中文描述： VOLTAGE-FREQUENCY CONVERTER, 6.144 MHz, PDSO16
封裝： SOIC-16
文件頁(yè)數(shù)： 2/12頁(yè)
文件大?。?/td> 131K
代理商： AD7742BR
REV. 0
–2–
AD7741–SPECIFICATIONS
(V
DD
= +4.75 V to +5.25 V; V
REF
= +2.5 V; f
CLKIN
= 6.144 MHz; all specifications T
MIN
to
T
MAX
unless otherwise noted.)
B and Y Version
1
Typ
Max
Units
Parameter
2
Min
Conditions/Comments
DC PERFORMANCE
Integral Nonlinearity
f
CLKIN
= 200 kHz
3
f
CLKIN
= 3 MHz
3
f
CLKIN
= 6.144 MHz
Offset Error
Gain Error
Offset Error Drift
3
Gain Error Drift
3
Power Supply Rejection Ratio
3
ANALOG INPUT
5
Input Current
Input Voltage Range
±
0.012
±
0.012
±
0.024
±
40
+1.6
% of Span
4
% of Span
% of Span
mV
% of Span
μ
V/
°
C
ppm of Span/
°
C
dB
V
DD
> 4.8 V
0
+0.8
±
30
±
16
–63
V
DD
=
±
5%
±
50
±
100
V
REF
nA
V
0
+2.5 V REFERENCE (REFIN/OUT)
REFIN
Nominal Input Voltage
Input Impedance
6
REFOUT
Output Voltage
Output Impedance
3
Reference Drift
3
Line Rejection
Reference Noise (0.1 Hz to 10 Hz)
3
2.5
N/A
V
2.38
2.50
1
±
50
–60
100
2.60
V
k
ppm/
°
C
dB
μ
V p-p
LOGIC OUTPUT
Output High Voltage, V
OH
Output Low Voltage, V
OL
Minimum Output Frequency
Maximum Output Frequency
4.0
V
V
Hz
Hz
Output Sourcing 800
μ
A
7
Output Sinking 1.6 mA
7
V
IN
= 0 V
V
IN
= V
REF
0.4
0.05 f
CLKIN
0.45 f
CLKIN
LOGIC INPUT
PD
ONLY
Input High Voltage, V
IH
Input Low Voltage, V
IL
Input Current
Pin Capacitance
CLKIN ONLY
Input High Voltage, V
IH
Input Low Voltage, V
IL
Input Current
Pin Capacitance
2.4
V
V
nA
pF
0.8
±
100
10
6
3.5
V
V
μ
A
pF
0.8
±
2
10
6
CLOCK FREQUENCY
Input Frequency
6.144
MHz
For Specified Performance
POWER REQUIREMENTS
V
DD
I
DD
(Normal Mode)
I
DD
(Power-Down)
Power-Up Time
3
4.75
5.25
8
35
V
mA
μ
A
μ
s
Output Unloaded
15
30
Coming Out of Power-Down Mode
NOTES
1
Temperature ranges: B Version –40
°
C to +85
°
C: Y Version: –40
°
C to +105
°
C.
2
See Terminology.
3
Guaranteed by design and characterization, not production tested.
4
Span = Maximum Output Frequency–Minimum Output Frequency.
5
The absolute voltage on the input pin must not go more positive than V
– 2.25 V or more negative than GND.
6
Because this pin is bidirectional, any external reference must be capable of sinking/sourcing 400
μ
A in order to overdrive the internal reference.
7
These logic levels apply to CLKOUT only when it is loaded with one CMOS load.
Specifications subject to change without notice.
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