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参数资料
| 型号： | SPT7935SIT |
| 厂商： | SIGNAL PROCESSING TECHNOLOGIES |
| 元件分类： | ADC |
| 英文描述： | 12-BIT, 20 MSPS, 79 mW A/D CONVERTER |
| 中文描述： | 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP44 |
| 封装： | TQFP-44 |
| 文件页数： | 2/8页 |
| 文件大小： | 54K |
| 代理商： | SPT7935SIT |
2
7/12/00
SPT7935
ELECTRICAL SPECIFICATIONS
T
A
=T
MIN
–T
MAX
, V
DD1
=V
DD2
=V
DD3
=
3.3 V,
V
REF
–=1.0 V, V
REF
+=2.0 V, Common Mode Voltage=1.65 V,
CLK
=20 MSPS, Bias 1=90
μ
A,
Bias 2=9.5
μ
A, Differential Input, Duty Cycle=50%, unless otherwise specified.
TEST
CONDITIONS
TEST
LEVEL
SPT7935
TYP
PARAMETERS
MIN
MAX
UNITS
DC Accuracy
Resolution
Differential Linearity
Integral Linearity
No Missing Codes
12
±
0.6
±
3.0
Bits
LSB
LSB
V
V
VI
Guaranteed
Analog Input
Input Voltage Range (Differential)
Common Mode Input Voltage
Input Capacitance
Input Bandwidth (Large Signal)
Offset (Mid-scale)
Gain Error
Reference Voltages
Reference Input Voltage Range
(V
REF
+ – V
REF
–)
Negative Reference Voltage (V
REF
–)
Positive Reference Voltage (V
REF
+)
Common Mode Output Voltage (V
CM
)
V
REF
+ Current
V
REF
– Current
Switching Performance
Maximum Conversion Rate
Pipeline Delay
(See Timing Diagram)
Aperture Delay Time (T
AP
)
Aperture Jitter Time
IV
IV
V
V
V
V
±
0.6
1.2
±
1.0
1.65
1.4
120
±
1.0
0.3
±
1.7
1.9
V
V
pF
MHz
% FSR
% FSR
V
IN
+=V
IN
–=V
CM
IV
0.6
1.0
1.7
V
IV
IV
VI
V
V
0.9
1.9
1.3
1.0
2.0
1.65
35
–25
1.3
2.6
1.8
V
V
V
μ
A
μ
A
I
O
= –1
μ
A
VI
IV
20
MHz
Clocks
7.5
V
V
5
ns
ps-rms
10
Dynamic Performance
Effective Number of Bits
IN
= 5.0 MHz
IN
= 10.0 MHz
Signal-To-Noise Ratio
IN
= 5.0 MHz
IN
= 10.0 MHz
Total Harmonic Distortion
IN
= 5.0 MHz
IN
= 10.0 MHz
VI
V
9.2
9.8
9.0
Bits
Bits
VI
V
59
62
58
dB
dB
VI
V
–68
–60
–61
dB
dB
ABSOLUTE MAXIMUM RATINGS (Beyond which damage may occur)
1
25
°
C
Supply Voltages
V
DD1....................................................................
–0.5 V to +6 V
V
DD2....................................................................
–0.5 V to +6 V
V
DD3....................................................................
–0.5 V to +6 V
Input Voltages
Analog Input................................. –0.5 V to (V
DD
+0.5 V)
Digital Input .................................. –0.5 V to (V
DD
+0.5 V)
V
REF
+ .......................................... –0.5 V to (V
DD
+0.5 V)
V
REF
– .......................................... –0.5 V to (V
DD
+0.5 V)
CLK .............................................. –0.5 V to (V
DD
+0.5 V)
Temperature
Operating Temperature ............................. –40 to +85
°
C
Storage Temperature............................... –65 to +125
°
C
Note:
1. Operation at any Absolute Maximum Rating is not
implied. See Electrical Specifications for proper
nominal applied conditions in typical applications.
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