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PDF ADA4932-2 Data sheet ( Hoja de datos )
| Número de pieza | ADA4932-2 | |
| Descripción | (ADA4932-1/-2) Low Power Differential ADC Driver | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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High performance at low power
High speed
−3 dB bandwidth of 560 MHz, G = 1
0.1 dB gain flatness to 300 MHz
Slew rate: 2800 V/µs, 25% to 75%
Fast 0.1% settling time of 9 ns
Low power: 9.6 mA per amplifier
Low harmonic distortion
100 dB SFDR @ 10 MHz
90 dB SFDR @ 20 MHz
Low input voltage noise: 3.6 nV/√Hz
±0.5 mV typical input offset voltage
Externally adjustable gain
Can be used with fractional differential gains
Differential-to-differential or single-ended-to-differential
operation
Adjustable output common-mode voltage
Wide supply range: +3 V to ±5 V
Available in 16-lead and 24-lead LFCSP packages
APPLICATIONS
ADC drivers
Single-ended-to-differential converters
IF and baseband gain blocks
Differential buffers
Line drivers
GENERAL DESCRIPTION
The ADA4932-x is the next generation AD8132 with higher
performance, and lower noise and power consumption. It is an
ideal choice for driving high performance ADCs as a single-ended-
to-differential or differential-to-differential amplifier. The output
common-mode voltage is user adjustable by means of an internal
common-mode feedback loop, allowing the ADA4932-x output
to match the input of the ADC. The internal feedback loop also
provides exceptional output balance as well as suppression of
even-order harmonic distortion products.
With the ADA4932-x, differential gain configurations are easily
realized with a simple external four-resistor feedback network that
determines the closed-loop gain of the amplifier.
The ADA4932-x is fabricated using the Analog Devices, Inc.,
proprietary silicon-germanium (SiGe) complementary bipolar
process, enabling it to achieve low levels of distortion and noise
at low power consumption. The low offset and excellent dynamic
performance of the ADA4932-x make it well suited for a wide
variety of data acquisition and signal processing applications.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
Low Power
Differential ADC Driver
ADA4932-1/ADA4932-2
FUNCTIONAL BLOCK DIAGRAMS
–FB 1
+IN 2
–IN 3
+FB 4
ADA4932-1
12 PD
11 –OUT
10 +OUT
9 VOCM
Figure 1. ADA4932-1
–IN1 1
+FB1 2
+VS1 3
+VS1 4
–FB2 5
+IN2 6
ADA4932-2
18 +OUT1
17 VOCM1
16 –VS2
15 –VS2
14 PD2
13 –OUT2
Figure 2. ADA4932-2
–40
VOUT, dm = 2V p-p
–50
HD2, G = 1
–60 HD3, G = 1
HD2, G = 2
–70 HD3, G = 2
–80
–90
–100
–110
–120
–130
–140
100k 1M 10M 100M
FREQUENCY (Hz)
Figure 3. Harmonic Distortion vs. Frequency at Various Gains
The ADA4932-x is available in a Pb-free, 3 mm × 3 mm 16-lead
LFCSP (ADA4932-1, single) or a Pb-free, 4 mm × 4 mm 24-lead
LFCSP (ADA4932-2, dual). The pinout has been optimized to
facilitate PCB layout and minimize distortion. The ADA4932-1
and the ADA4932-2 are specified to operate over the −40°C to
+105°C temperature range; both operate on supplies between
+3 V and ±5 V.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2008 Analog Devices, Inc. All rights reserved.
1 page  
ADA4932-1/ADA4932-2
5 V OPERATION
TA = 25°C, +VS = 5 V, −VS = 0 V, VOCM = 2.5 V, RF = 499 Ω, RG = 499 Ω, RT = 53.6 Ω (when used), RL, dm = 1 kΩ, unless otherwise noted.
All specifications refer to single-ended input and differential outputs, unless otherwise noted. Refer to Figure 55 for signal definitions.
±DIN to VOUT, dm Performance
www.daTtaasbhleee4t.4u.com
Parameter
DYNAMIC PERFORMANCE
−3 dB Small Signal Bandwidth
−3 dB Large Signal Bandwidth
Bandwidth for 0.1 dB Flatness
Slew Rate
Settling Time to 0.1%
Overdrive Recovery Time
NOISE/HARMONIC PERFORMANCE
Second Harmonic
Third Harmonic
IMD
Voltage Noise (RTI)
Input Current Noise
Crosstalk
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
Input Offset Current
Input Resistance
Input Capacitance
Input Common-Mode Voltage Range
Conditions
VOUT, dm = 0.1 V p-p
VOUT, dm = 0.1 V p-p, RF = RG = 205 Ω
VOUT, dm = 2.0 V p-p
VOUT, dm = 2.0 V p-p, RF = RG = 205 Ω
VOUT, dm = 2.0 V p-p, ADA4932-1, RL = 200 Ω
VOUT, dm = 2.0 V p-p, ADA4932-2, RL = 200 Ω
VOUT, dm = 2 V p-p, 25% to 75%
VOUT, dm = 2 V step
VIN = 0 V to 2.5 V ramp, G = 2
See Figure 54 for distortion test circuit
VOUT, dm = 2 V p-p, 1 MHz
VOUT, dm = 2 V p-p, 10 MHz
VOUT, dm = 2 V p-p, 20 MHz
VOUT, dm = 2 V p-p, 50 MHz
VOUT, dm = 2 V p-p, 1 MHz
VOUT, dm = 2 V p-p, 10 MHz
VOUT, dm = 2 V p-p, 20 MHz
VOUT, dm = 2 V p-p, 50 MHz
f1 = 30 MHz, f2 = 30.1 MHz, VOUT, dm = 2 V p-p
f = 1 MHz
f = 1 MHz
f = 10 MHz, ADA4932-2
V+DIN = V−DIN = VOCM = 2.5 V
TMIN to TMAX variation
TMIN to TMAX variation
Differential
Common mode
Min
−2.2
−5.3
−0.25
CMRR
Open-Loop Gain
OUTPUT CHARACTERISTICS
Output Voltage Swing
Linear Output Current
Output Balance Error
∆VOUT, dm/∆VIN, cm, ∆VIN, cm = ±1 V
64
Maximum ∆VOUT, single-ended output,
RF = RG = 10 kΩ, RL = 1 kΩ
200 kHz, RL, dm = 10 Ω, SFDR = 67 dB
∆VOUT, cm/∆VOUT, dm, ∆VOUT, dm = 1 V p-p, 1 MHz,
see Figure 53 for output balance test circuit
−VS + 1.15 to
+VS − 1.15
Typ
560
990
315
320
120
200
2200
10
20
−110
−100
−90
−72
−120
−100
−87
−70
−91
3.6
1.0
−100
±0.5
−3.7
−3.0
−9.5
±0.025
11
16
0.5
−VS + 0.2 to
+VS − 1.8
−100
66
−VS + 1.02 to
+VS − 1.02
53
−64
Max Unit
MHz
MHz
MHz
MHz
MHz
MHz
V/µs
ns
ns
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
nV/√Hz
pA/√Hz
dB
+2.2
−0.23
+0.25
mV
µV/°C
µA
nA/°C
µA
MΩ
MΩ
pF
V
−87 dB
dB
V
mA rms
−60 dB
Rev. 0 | Page 5 of 28
5 Page 
4
VOUT, dm = 100mV p-p
2
0
www.datasheet4u.com
–2
CL = 0pF
CL = 0.9pF
CL = 1.8pF
–4
–6
–8
1M
10M 100M
1G
10G
FREQUENCY (Hz)
Figure 19. Small Signal Frequency Response at Various Capacitive Loads
0.5
VOUT, dm = 100mV p-p
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
ADA4932-1, RL = 1kΩ
ADA4932-1, RL = 200Ω
ADA4932-2, CH 1, RL = 1kΩ
ADA4932-2, CH 1, RL = 200Ω
ADA4932-2, CH 2, RL = 1kΩ
ADA4932-2, CH 2, RL = 200Ω
–0.5
1M
10M 100M
FREQUENCY (Hz)
1G
Figure 20. 0.1 dB Flatness Small Signal Frequency Response for Various Loads
2
VOUT, cm = 100mV p-p
1
0
–1
–2
VOCM (DC) = 0V
VOCM (DC) = +2.5V
–3 VOCM (DC) = –2.5V
–4
–5
–6
–7
–8
1M
10M 100M
FREQUENCY (Hz)
1G
Figure 21. VOCM Small Signal Frequency Response at Various DC Levels
ADA4932-1/ADA4932-2
4
VOUT, dm = 2V p-p
2
0
CL = 0pF
–2 CL = 0.9pF
CL = 1.8pF
–4
–6
–8
–10
10M
100M
FREQUENCY (Hz)
1G
Figure 22. Large Signal Frequency Response at Various Capacitive Loads
0.5
VOUT, dm = 2V p-p
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
1M
ADA4932-1, RL = 1kΩ
ADA4932-1, RL = 200Ω
ADA4932-2, CH 1, RL = 1kΩ
ADA4932-2, CH 1, RL = 200Ω
ADA4932-2, CH 2, RL = 1kΩ
ADA4932-2, CH 2, RL = 200Ω
10M 100M
FREQUENCY (Hz)
1G
Figure 23. 0.1 dB Flatness Large Signal Frequency Response for Various Loads
2
VOUT, cm = 2V p-p
1
0
–1
–2
–3
–4
–5
–6
–7
–8
1M
VOCM (DC) = 0V
VOCM (DC) = +2.5V
VOCM (DC) = –2.5V
10M 100M
FREQUENCY (Hz)
1G
Figure 24. VOCM Large Signal Frequency Response at Various DC Levels
Rev. 0 | Page 11 of 28
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet ADA4932-2.PDF ] | |
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