ADA4896-2ACP-EBZ AD [Analog Devices], ADA4896-2ACP-EBZ Datasheet

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ADA4896-2ACP-EBZ

Manufacturer Part Number
ADA4896-2ACP-EBZ
Description
1 nV/?Hz, Low Power
Manufacturer
AD [Analog Devices]
Datasheet
Data Sheet
FEATURES
Low wideband noise
Low 1/f noise: 2.4 nV/√Hz at 10 Hz
Low distortion: −115 dBc at 100 kHz, V
Low power: 3 mA per amplifier
Low input offset voltage: 0.5 mV maximum
High speed
Rail-to-rail output
Wide supply range: 3 V to 10 V
Disable feature (ADA4897-1/ADA4897-2)
APPLICATIONS
Low noise preamplifier
Ultrasound amplifiers
PLL loop filters
High performance ADC drivers
DAC buffers
GENERAL DESCRIPTION
The
low noise, rail-to-rail output, high speed voltage feedback amplifiers
that have a quiescent current of 3 mA. With a 1/f noise of
2.4 nV/√Hz at 10 Hz and a spurious-free dynamic range of −80 dBc
at 2 MHz, the
solutions in a variety of applications, including ultrasound, low
noise preamplifiers, and drivers of high performance ADCs. The
Analog Devices, Inc., proprietary next-generation SiGe bipolar
process and innovative architecture enable such high performance
amplifiers.
The
bandwidth, 120 V/μs slew rate, and settle to 0.1% in 45 ns.
With a wide supply voltage range of 3 V to 10 V, the ADA4896-2/
ADA4897-1/ADA4897-2
require high dynamic range, precision, low power, and high speed.
The
packages. The
SOT-23 packages. The
package. The
the extended industrial temperature range of −40°C to +125°C.
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or 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.
Trademarks and registered trademarks are the property of their respective owners.
1 nV/√Hz
2.8 pA/√Hz
−3 dB bandwidth: 230 MHz (G = +1)
Slew rate: 120 V/μs
Settling time to 0.1%: 45 ns
ADA4896-2/ADA4897-1/ADA4897-2
ADA4896-2/ADA4897-1/ADA4897-2
ADA4896-2
ADA4896-2/ADA4897-1/ADA4897-2
ADA4897-1
ADA4896-2/ADA4897-1/ADA4897-2
is available in 8-lead LFCSP and 8-lead MSOP
ADA4897-2
are ideal candidates for systems that
is available in 8-lead SOIC and 6-lead
is available in a 10-lead MSOP
OUT
are unity-gain stable,
have 230 MHz
= 2 V p-p
operate over
are ideal
ADA4896-2/ADA4897-1/ADA4897-2
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Table 1. Other Low Noise Amplifiers
Part No.
AD797
AD8021
AD8099
AD8045
ADA4899-1
ADA4898-1/
ADA4898-2
Table 2. Complementary ADCs
Part No.
AD7944
AD7985
AD7986
Rail-to-Rail Output Amplifiers
8
7
6
5
4
3
2
1
0
1
V
S
= ±5V
FUNCTIONAL BLOCK DIAGRAM
10
At 1 kHz
0.9
5
3
6
1.4
0.9
Bits
14
16
18
–V
+IN
–IN
NC
Figure 2. Voltage Noise vs. Frequency
S
Figure 1. 8-Lead SOIC (ADA4897-1)
1 nV/√Hz, Low Power,
1
2
3
4
V
100
N
(nV/√Hz)
©2012 Analog Devices, Inc. All rights reserved.
FREQUENCY (Hz)
At 100 kHz
0.9
2.1
0.95
3
1
0.9
Speed (MSPS)
2.5
2.5
2
1k
10k
8
7
6
5
DISABLE
+V
OUT
NC
BW (MHz)
8
490
510
1000
600
65
S
100k
Power (mW)
15.5
15.5
15
www.analog.com
1M
Supply
Voltage (V)
10 to 30
5 to 24
5 to 12
3.3 to 12
5 to 12
10 to 32
5M

Related parts for ADA4896-2ACP-EBZ

ADA4896-2ACP-EBZ Summary of contents

Page 1

... The ADA4896-2/ADA4897-1/ADA4897-2 bandwidth, 120 V/μs slew rate, and settle to 0. ns. With a wide supply voltage range the ADA4896-2/ ADA4897-1/ADA4897-2 are ideal candidates for systems that require high dynamic range, precision, low power, and high speed. ...

Page 2

... ADA4896-2/ADA4897-1/ADA4897-2 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 ±5 V Supply ................................................................................... Supply ................................................................................... Supply ................................................................................... 6 Absolute Maximum Ratings ............................................................ 8 Thermal Resistance ...................................................................... 8 Maximum Power Dissipation ..................................................... 8 ESD Caution .................................................................................. 8 Pin Configurations and Function Descriptions ........................... 9 Typical Performance Characteristics ........................................... 11 REVISION HISTORY 4/12— ...

Page 3

... ± kΩ 100 Ω kΩ 100 Ω L SFDR = −45 dBc Sinking/sourcing 30% overshoot Rev. | Page ADA4896-2/ADA4897-1/ADA4897-2 Min Typ Max 230 120 45 90 −115 −93 −80 −61 2 2.8 99 −500 −28 +500 0 ...

Page 4

... ADA4896-2/ADA4897-1/ADA4897-2 Parameter POWER SUPPLY Operating Range Quiescent Current per Amplifier Power Supply Rejection Ratio (PSRR) Positive Negative DISABLE PIN ( ADA4897-1 ADA4897 DISABLE Voltage Input Current Enabled Disabled Switching Speed Enabled Disabled +5 V SUPPLY T = 25° + kΩ to midsupply, unless otherwise noted. ...

Page 5

... L SFDR = −45 dBc Sinking/sourcing 30% overshoot DISABLE = 4 5.5 V, − −V = −0 +0 Enabled Disabled DISABLE = +5 V DISABLE = Rev. | Page ADA4896-2/ADA4897-1/ADA4897-2 Min Typ Max 0.1 to 4.1 −91 −118 96 4.85 4.98 4.8 4.88 0.15 0.014 0.2 0.08 70 125 ...

Page 6

... ADA4896-2/ADA4897-1/ADA4897 SUPPLY T = 25° + kΩ to midsupply, unless otherwise noted Table 5. Parameter DYNAMIC PERFORMANCE −3 dB Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate Settling Time to 0.1% Settling Time to 0.01% NOISE/HARMONIC PERFORMANCE Harmonic Distortion (SFDR) Input Voltage Noise Input Current Noise ...

Page 7

... Switching Speed Enabled Disabled Test Conditions/Comments + 3.7 V, − −V = −0 +0 Enabled Disabled DISABLE = +3 V DISABLE = Rev. | Page ADA4896-2/ADA4897-1/ADA4897-2 Min Typ Max −96 −121 −96 −120 >+V − 0.5 S <− −1.2 −15 0.25 12 Unit dB ...

Page 8

... Dual LFCSP (ADA4896-2) 8-Lead Single SOIC (ADA4897-1) 6-Lead Single SOT-23 (ADA4897-1) 10-Lead Dual MSOP (ADA4897-2) MAXIMUM POWER DISSIPATION The maximum safe power dissipation for the ADA4896-2/ ADA4897-1/ADA4897-2 is limited by the associated rise in junction temperature ( the die. At approximately 150C, ...

Page 9

... Exposed Pad (LFCSP Only). The exposed pad can be connected to GND or power planes can be left floating. S Description No Connect. Do not connect to these pins. Inverting Input. Noninverting Input. Negative Supply. Output. Positive Supply. Disable. B Rev. | Page ADA4896-2/ADA4897-1/ADA4897-2 ADA4896-2 OUT1 + –IN1 OUT2 2 7 +IN1 –IN2 3 6 – ...

Page 10

... ADA4896-2/ADA4897-1/ADA4897-2 Table 10. ADA4897-2 Pin Function Descriptions Pin No. Mnemonic Description 1 OUT1 Output 1. 2 −IN1 Inverting Input 1. 3 +IN1 Noninverting Input 1. 4 −V Negative Supply DISABLE1 Disable 1. 6 DISABLE2 Disable 2. 7 +IN2 Noninverting Input 2. 8 −IN2 Inverting Input 2. 9 OUT2 Output 2 ...

Page 11

... 100 300 V = + ±5V S 100 500 –40°C +125°C +25°C 100M 1G B Rev. | Page ADA4896-2/ADA4897-1/ADA4897 ± 100mV p-p –1 400mV p-p –2 2V p-p –3 –4 –5 0 FREQUENCY (MHz) Figure 12. Frequency Response for Various Output Voltages ...

Page 12

... ADA4896-2/ADA4897-1/ADA4897 + 100Ω 20mV p-p OUT –1 –2 –3 0.1 1 FREQUENCY (MHz) Figure 15. Small Signal Frequency Response vs. Capacitive Load – + p-p OUT – 100Ω, SECOND L –70 – 100Ω, THIRD L –90 –100 –110 R = 1kΩ ...

Page 13

... Figure 25. Small Signal Transient Response for Various Supplies ± –10 100k 1M 5M Figure 26. Small Signal Transient Response for Various Supplies Rev. | Page ADA4896-2/ADA4897-1/ADA4897 ±5V S 100 UNITS σ = 309.2µV/°C –400 –200 0 200 400 600 OFFSET VOLTAGE DRIFT DISTRIBUTION (nV/° ...

Page 14

... ADA4896-2/ADA4897-1/ADA4897 39pF 20pF 0pF –10 Figure 27. Small Signal Transient Response for Various Capacitive Loads 1 1 0.5 0 –0.5 –1.0 –1.5 Figure 28. Large Signal Transient Response and OUT 0 –1 –2 –3 –4 Figure 29. Input Overdrive Recovery Time ...

Page 15

... Figure 37. Input Offset Voltage vs. Temperature for Various Supplies –10.50 –10.75 –11.00 +PSRR –11.25 –11.50 10M 100M Figure 38. Input Bias Current vs. Temperature for Various Supplies B Rev. | Page ADA4896-2/ADA4897-1/ADA4897-2 PART DISABLED 100 10 PART ENABLED 1 0.1 0 FREQUENCY (MHz) Figure 36. Output Impedance vs. Frequency V = ± ...

Page 16

... TEMPERATURE (°C) Figure 39. Supply Current vs. Temperature for Various Supplies – + – p-p OUT –60 –70 –80 –90 –100 –110 –120 –130 0.01 0.1 1 FREQUENCY (MHz) Figure 40. Crosstalk, OUT1 to OUT2 (ADA4896-2 5.5 DISABLE PIN 5.0 4.5 4.0 3.5 +25°C 3.0 –40°C 2.5 2.0 1.5 TIME = 200ns/DIV – ...

Page 17

... ADA4896-2/ADA4897-1/ADA4897-2 increased beyond the typical fundamental limits of other low noise, unity-gain stable amplifiers. The maximum offset voltage of 500 μV and drift of 0.2 μV/°C make the ADA4896-2/ADA4897-1/ ADA4897-2 excellent amplifier choices even when the low noise performance is not needed because there is minimal power penalty in achieving the low input noise or the high bandwidth ...

Page 18

... ADA4896-2/ADA4897-1/ADA4897-2 DC ERRORS Figure 46 shows a typical connection diagram and the major dc error sources – – – B – Figure 46. Typical Connection Diagram and DC Error Sources The ideal transfer function (all error sources set to 0 and infinite dc gain) can be written as ⎛ ...

Page 19

... R G feedback path that, if within the bandwidth of the loop, can create (6) excessive ringing and oscillation. The ADA4896-2/ADA4897-1/ ADA4897-2 Placing a small snub resistor (R output and the capacitive load mitigates the problem. Figure 50 shows the effect of using a snub resistor (R peaking for the worst-case frequency response (gain of +2). ...

Page 20

... ADA4896-2/ADA4897-1/ADA4897-2 APPLICATIONS INFORMATION TYPICAL PERFORMANCE VALUES To reduce design time and eliminate uncertainty, Table 13 provides a reference for typical gains, component values, and performance parameters. The supply voltage used The band- width is obtained with a small signal output of 200 mV p-p, and the slew rate is obtained with output step. ...

Page 21

... V2) where switch resistances and nonlinear resistances do not matter. In this way, the gain error can be reduced while preserving the noise performance of the ADA4896-2. Note that the input bias current of the output buffer can cause problems with the impedance of the S2A and S2B sampling switches ...

Page 22

... LNA VGA SWITCHES AAF CW (ANALOG) SPECTRAL BEAMFORMER DOPPLER PROCESSING ADA4896-2/ MODE ADA4897-1/ ADA4897-2 AUDIO OUTPUT Figure 54. Simplified Ultrasound System Block Diagram The ultrasound system consists of two main operations: the time gain control (TGC) operation and the continuous wave (CW) Doppler operation. The components of these two operations into a single IC ...

Page 23

... C limiting the magnitude of the gain is the output swing and drive ADA4896-2 capability of the op amp selected for the I-to-V converter, in this example, the ADA4896-2/ADA4897-1/ADA4897-2. Because any amplifier has limited drive capability, a finite number of ADA4896-2 channels can be summed. ...

Page 24

... Power Supply Bypassing Power supply bypassing is a critical aspect in the performance of the ADA4896-2/ADA4897-1/ADA4897-2. A parallel connec- tion of capacitors from each power supply pin to ground works best. Smaller value capacitor electrolytics offer better high frequency response, whereas larger value capacitor electrolytics offer better low frequency performance ...

Page 25

... TOP VIEW 0.05 MAX 0.02 NOM COPLANARITY 0.08 0.30 0.203 REF 0.25 0.20 COMPLIANT TO JEDEC STANDARDS MO-229-WEED Figure 57. 8-Lead Lead Frame Chip Scale Package [LFCSP_WD × Body, Very Very Thin, Dual Lead (CP-8-11) Dimensions shown in millimeters B Rev. | Page ADA4896-2/ADA4897-1/ADA4897-2 0.80 0.23 0.55 0.09 0.40 2.44 2.34 2.24 0.50 BSC 8 1.70 EXPOSED PAD 1.60 1.50 1 BOTTOM VIEW ...

Page 26

... ADA4896-2/ADA4897-1/ADA4897-2 4.00 (0.1574) 3.80 (0.1497) 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 0.10 CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. 1.70 1.60 1.50 PIN 1 INDICATOR 1.30 1.15 0.90 0.15 MAX 0.05 MIN 5.00 (0.1968) 4.80 (0.1890 6.20 (0.2441) 1 5.80 (0.2284) 4 1.27 (0.0500) BSC 1.75 (0.0688) 1.35 (0.0532) 8° ...

Page 27

... ADA4896-2ARMZ-RL −40°C to +125°C ADA4896-2ACPZ-R2 −40°C to +125°C ADA4896-2ACPZ-R7 −40°C to +125°C ADA4896-2ACPZ-RL −40°C to +125°C ADA4896-2ACP-EBZ ADA4896-2ARM-EBZ ADA4897-1ARZ −40°C to +125°C ADA4897-1ARZ-R7 −40°C to +125°C ADA4897-1ARZ-RL −40°C to +125°C ADA4897-1ARJZ-R2 − ...

Page 28

... ADA4896-2/ADA4897-1/ADA4897-2 NOTES ©2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09447-0-4/12(B) Rev Page Data Sheet ...

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