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| 型號： | ADA4927-2YCPZ-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 1/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP CF DIFF DUAL LN 24LFCSP |
| 標(biāo)準(zhǔn)包裝： | 5,000 |
| 放大器類型： | 電流反饋 |
| 電路數(shù)： | 2 |
| 輸出類型： | 差分 |
| 轉(zhuǎn)換速率： | 5000 V/µs |
| -3db帶寬： | 2.3GHz |
| 電流 - 輸入偏壓： | 500nA |
| 電壓 - 輸入偏移： | 300µV |
| 電流 - 電源： | 20mA |
| 電流 - 輸出 / 通道： | 65mA |
| 電壓 - 電源，單路/雙路(±)： | 4.5 V ~ 11 V，±2.25 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 105°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-VFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 24-LFCSP-VQ（4x4） |
| 包裝： | 帶卷 (TR) |
Ultralow Distortion
Current Feedback Differential ADC Driver
ADA4927-1/ADA4927-2
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology
62-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
l rights reserved.
Way, P.O. Box 9106, Norwood, MA 020
2008-2009 Analog Devices, Inc. Al
FEATURES
Extremely low harmonic distortion
105 dBc HD2 @ 10 MHz
91 dBc HD2 @ 70 MHz
87 dBc HD2 @ 100 MHz
103 dBc HD3 @ 10 MHz
98 dBc HD3 @ 70 MHz
89 dBc HD3 @ 100 MHz
Better distortion at higher gains than VF amplifiers
Low input voltage noise: 1.4 nV/√Hz
High speed
3 dB bandwidth of 2.3 GHz
0.1 dB gain flatness: 150 MHz
Slew rate: 5000 V/μs, 25% to 75%
Fast 0.1% settling time: 10 ns
Low input offset voltage: 0.3 mV typical
Externally adjustable gain
Stability and bandwidth controlled by feedback resistor
Differential-to-differential or single-ended-to-differential
operation
Adjustable output common-mode voltage
Wide supply operation: +5 V to ±5 V
APPLICATIONS
ADC drivers
Single-ended-to-differential converters
IF and baseband gain blocks
Differential buffers
Differential line drivers
GENERAL DESCRIPTION
The ADA4927 is a low noise, ultralow distortion, high speed,
current feedback differential amplifier that is an ideal choice for
driving high performance ADCs with resolutions up to 16 bits
from dc to 100 MHz. The output common-mode level can easily be
matched to the required ADC input common-mode levels. The
internal common-mode feedback loop provides exceptional output
balance and suppression of even-order distortion products.
Differential gain configurations are easily realized using an
external feedback network comprising four resistors. The
current feedback architecture provides loop gain that is nearly
independent of closed-loop gain, achieving wide bandwidth,
low distortion, and low noise at higher gains and lower power
consumption than comparable voltage feedback amplifiers.
The ADA4927 is fabricated using the Analog Devices, Inc., silicon-
germanium complementary bipolar process, enabling very low
levels of distortion with an input voltage noise of only 1.3 nV/√Hz.
FUNCTIONAL BLOCK DIAGRAMS
1
–FB
2
+IN
3
–IN
4
+FB
11 –OUT
12 PD
10 +OUT
9VOCM
5
+
V
S
6
+
V
S
7
+
V
S
8
+
V
S
15
–V
S
16
–V
S
14
–V
S
13
–V
S
ADA4927-1
075
74
-00
1
Figure 1.
ADA4927-2
1
–IN1
2
+FB1
3
+VS1
4
+VS1
5
–FB2
6
+IN2
15 –VS2
16 –VS2
17 VOCM1
18 +OUT1
14 PD2
13 –OUT2
7
–I
N
2
8
+
F
B
2
9
+
V
S
2
11
V
O
C
M
2
12
+
O
U
T
2
10
+
V
S
2
21
–V
S
1
22
–V
S
1
23
–
F
B
1
24
+
IN
1
20
P
D
1
19
–O
U
T
1
07
57
4-
0
02
Figure 2.
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
1
10
100
1k
FREQUENCY (MHz)
SPU
R
IO
U
S-
F
R
E
D
YN
A
M
IC
R
A
N
G
E
(
d
B
c)
07
57
4-
0
26
VOUT, dm = 2V p-p
G = 1
G = 10
G = 20
Figure 3. Spurious-Free Dynamic Range vs. Frequency at Various Gains
The low dc offset and excellent dynamic performance of the
ADA4927 make it well suited for a wide variety of data acquisition
and signal processing applications.
The ADA4927-1 is available in a Pb-free, 3 mm × 3 mm 16-lead
LFCSP, and the ADA4927-2 is available in a Pb-free, 4 mm × 4 mm
24-lead LFCSP. The pinouts are optimized to facilitate printed
circuit board (PCB) layout and to minimize distortion. They are
specified to operate over the 40°C to +105°C temperature range.
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