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| 型号： | ADA4940-2ACPZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/33页 |
| 文件大小： | 0K |
| 描述： | IC DIFF ADC DVR 18BIT LN 24LFCSP |
| 标准包装： | 5,000 |
| 放大器类型： | 差分 |
| 电路数： | 2 |
| 输出类型： | 差分 |
| 转换速率： | 95 V/µs |
| -3db带宽： | 260MHz |
| 电流 - 输入偏压： | 1.1µA |
| 电压 - 输入偏移： | 60µV |
| 电流 - 电源： | 1.25mA |
| 电流 - 输出 / 通道： | 46mA |
| 电压 - 电源，单路/双路(±)： | 3 V ~ 7 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 24-LFCSP-VQ（4x4） |
| 包装： | 带卷 (TR) |
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Data Sheet
ADA4940-1/ADA4940-2
Rev. C | Page 15 of 32
–20
–130
0.01
0.1
110
S
P
URI
O
U
S
-F
RE
E
DY
NAM
IC
RANG
E
(
d
Bc
)
FREQUENCY (MHz)
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
084
52-
030
VOUT, dm = 2V p-p
LFCSP: RL = 1k
LFCSP: RL = 200
SOIC: RL = 1k
SOIC: RL = 200
Figure 31. Spurious-Free Dynamic Range vs. Frequency at
RL = 200 Ω and RL = 1kΩ
–20
–150
–2.5
2.5
HARM
O
N
IC
DI
S
T
O
RT
IO
N
(
d
Bc)
VOCM (V)
–140
–130
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–2.0 –1.5 –1.0 –0.5
0
0.5
1.0
1.5
2.0
VOUT, dm = 2V p-p
HD2 AT 1MHz
HD2 AT 100kHz
HD3 AT 1MHz
HD3 AT 100kHz
084
52
-02
5
Figure 32. Harmonic Distortion vs. VOCM for 100 kHz and 1 MHz,
±2.5 V Supplies (LFCSP)
–20
–130
0.01
0.1
1
10
HARM
O
NI
C
DI
S
T
O
R
T
IO
N
(
d
Bc)
FREQUENCY (MHz)
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
HD3 AT VOUT, dm = 8V p-p
HD2 AT VOUT, dm = 8V p-p
HD2 AT VOUT, dm = 4V p-p
HD2 AT VOUT, dm = 2V p-p
HD3 AT VOUT, dm = 2V p-p
08
45
2-
0
26
HD3 AT VOUT, dm = 4V p-p
Figure 33. Harmonic Distortion vs. Frequency for Various VOUT, dm (LFCSP)
–140
–130
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
012
345
67
89
10
HA
RM
O
NI
C
DI
S
T
O
R
T
IO
N
(
d
B
c)
VOUT, dm (V p-p)
VS = ±1.5V HD3
VS = +3V, 0V HD3
VS = +3V, 0V HD2
VS = ±3.5V HD3
VS = ±2.5V HD3
VS = ±3.5V HD2
VS = ±1.5V HD2
f = 1MHz
0845
2-
027
VS = ±2.5V HD2
Figure 34. Harmonic Distortion vs. VOUT, dm for Various Supplies, f = 1 MHz
(LFCSP)
–20
–140
03.0
2.5
H
A
R
M
ON
IC
D
IS
T
OR
T
ION
(dB
c)
VOCM (V)
–130
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
0.5
1.0
1.5
2.0
+VS = +3V, –VS = 0V
VOUT, dm = 2V p-p
HD2 AT 1MHz
HD3 AT 1MHz
HD3 AT 100kHz
HD2 AT 100kHz
084
52
-02
8
Figure 35. Harmonic Distortion vs. VOCM for 100 kHz and 1 MHz, 3 V Supply
(LFCSP)
–20
–140
0.01
0.1
1
10
HARM
O
NI
C
DI
S
T
O
RT
IO
N
(d
Bc)
FREQUENCY (MHz)
–120
–130
–110
–100
–90
–80
–70
–60
–50
–40
–30
VOUT, dm = 2V p-p
084
52-
029
HD3, RF = RG = 499
HD2, RF = RG = 499
HD3, RF = RG = 1k
HD2, RF = RG = 1k
Figure 36. Harmonic Distortion vs. Frequency for Various RF and RG (LFCSP)
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