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| 型號： | AD7440 |
| 英文描述： | AD7450A/AD7440: Differential Input. 1MSPS. 12-Bit ADC in 8-lead SOT-23 Preliminary Data Sheet (Rev. PrF. 3/03) |
| 中文描述： | AD7450A/AD7440：差分輸入。 1MSPS。 12位ADC，采用8引腳SOT - 23的初步數(shù)據(jù)（牧師脈沖重復(fù)頻率。3 / 03） |
| 文件頁數(shù)： | 2/24頁 |
| 文件大?。?/td> | 914K |
| 代理商： | AD7440 |
REV. PrF
PRELIMINARY TECHNICAL DATA
–2–
Parameter
Test Conditions/Comments A Version
1
B Version
1
Unit
DYNAMIC PERFORMANCE
Signal to (Noise + Distortion)
(SINAD)
2
F
IN
= 200kHz
V
DD
= 4.75V to 5.25V
V
DD
= 2.7 V to 3.6V
V
DD
= 4.75V to 5.25V, -80dB typ
V
DD
= 2.7V to 3.6V, -78dB typ
V
DD
= 4.75V to5.25V, -82dB typ
V
DD
= 2.7V to 3.6V, -80dB typ
70
68
-75
-73
-75
-73
70
68
-75
-73
-75
-73
dB min
dB min
dB max
dB max
dB max
dB max
Total Harmonic Distortion (THD)
2
Peak Harmonic or Spurious Noise
2
Intermodulation Distortion (IMD)
2
Second Order Terms
Third Order Terms
Aperture Delay
2
Aperture Jitter
2
Full Power Bandwidth
2
-85
-85
10
50
20
2.5
-85
-85
10
50
20
2.5
dB typ
dB typ
ns typ
ps typ
MHz typ
MHz typ
@ -3 dB
@ -0.1 dB
DC ACCURACY
Resolution
Integral Nonlinearity (INL)
2
Differential Nonlinearity (DNL)
2
12
±2
12
±2
Bits
LSB max
Guaranteed No Missed Codes
to 12 Bits.
V
DD
= 4.75V to 5.25V
V
DD
= 2.7V to 3.6V
V
DD
= 4.75V to 5.25V
V
DD
= 2.7V to 3.6V
V
DD
= 4.75V to 5.25V
V
DD
= 2.7V to 3.6V
-1/+2
±3
±6
±3
±6
±3
±6
±1
±3
±6
±3
±6
±3
±6
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
Zero Code Error
2
Positive Gain Error
2
Negative Gain Error
2
ANALOG INPUT
Full Scale Input Span
Absolute Input Voltage
V
IN+
V
IN-
DC Leakage Current
Input Capacitance
2 x V
REF3
V
IN+
- V
IN -
V
IN+
- V
IN -
V
V
CM
= V
REF
V
CM4
± V
REF
/2 V
CM4
± V
REF
/2
V
CM
= V
REF
V
CM4
± V
REF
/2 V
CM4
± V
REF
/2
V
V
μA max
pF typ
pF typ
±1
20
6
±1
20
6
When in Track
When in Hold
REFERENCE INPUT
V
REF
Input Voltage
V
DD
= 4.75V to 5.25V
(±1% tolerance
for specified performance)
V
DD
= 2.7V to 3.6V
(±1% tolerance
for specified performance)
2.5
5
2.5
5
V
2.0
6
±1
15
2.0
6
±1
15
V
μA max
pF typ
DC Leakage Current
V
REF
Input Capacitance
LOGIC INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current, I
IN
Input Capacitance, C
IN7
LOGIC OUTPUTS
Output High Voltage, V
OH
2.4
0.8
±1
10
2.4
0.8
±1
10
V min
V max
μA max
pF max
Typically 10nA, V
IN
= 0VorV
DD
V
DD
= 4.75V to 5.25V
I
SOURCE
= 200μA
V
DD
= 2.7V to 3.6V
I
SOURCE
= 200μA
I
SINK
=200μA
2.8
2.8
V min
2.4
0.4
±1
10
Two’s
2.4
0.4
±1
10
Two’s
V min
V max
μA max
pF max
Output Low Voltage, V
OL
Floating-State Leakage Current
Floating-State Output Capacitance
7
Output Coding
Complement Comlement
AD7450A - SPECIFICATIONS
( V
DD
= 2.7V to 3.6V, f
SCLK
= 18MHz, f
S
= 1MSPS, V
REF
= 2.0 V;
V
DD
= 4.75V to 5.25V, f
SCLK
= 18MHz, f
S
= 1MSPS, V
REF
= 2.5 V;
V
CM 3
= V
REF
; T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
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