OPA4684 Status: ACTIVE

Quad, Low-Power, Current Feedback Operational Amplifier

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Datasheet

Quad, Low-Power, Current-Feedback Operational Amplifier (Rev. G) (PDF 714 KB)
02 Jul 2008

	OPA2684	OPA3684	OPA4684	OPA684
Iq per channel(Max)(mA)	3.9	3.9	7.8	3.9
Slew Rate(Typ)(V/us)	820	820	750	820
GBW(Typ)(MHz)	1900	1900	1900	1900
Io(Typ)(mA)	120	120	120	120
Vs(Min)(V)	9	5	5	5
Vs(Max)(V)	12	12	12	12
Number of Channels	2	3	4	1
Pin/Package	8SOIC, 8SOT-23	14SOIC, 16SSOP/QSOP	14SOIC, 14TSSOP	6SOT-23, 8SOIC
Acl, min stable gain(V/V)	1	1	1	1
BW @ Acl(MHz)	210	210	250	210
Diff Gain(%)	0.04	0.04	0.04	0.04
Diff Phase(deg)	0.02	0.02	0.02	0.02
Vio(Max)(mV)	3.5	3.5	4	3.5
THD (Fc=1 MHz)(Typ)(dB)	-79	-79	-79	-79
Settling Time (0.1%)(Typ)(ns)	11	11		11
Offset Voltage Drift (+/-)(Max)(uV/Degrees Celsius)	12	12	12	12
Available Channels	S, D, T, Q	S, D, T, Q	S, D, T, Q	S, D, T, Q
Vn at Flatband(Typ)(nV/rtHz)	3.7	3.7	3.7	3.7
Approx. Price (US$)	2.10 \| 1ku	2.75 \| 1ku	3.30 \| 1ku	1.35 \| 1ku
Iib(Max)(nA)	13000	13000	15000	13000
Noninverting Input Current Noise(pA/rtHz)	9.4	9.4	9.4	9.4
2nd Harmonic(dBc)	80	80	80	80
3rd Harmonic(dBc)	80	80	80	80
@ Mhz	5	5	5	5
BW @ G=+2(MHz)	170	170	170	170
0.1 dB BW Flatness(MHz)	19	19	19	19
Inverting Input Current Noise(pA/rtHz)	17	17	17	17
Crosstalk(-dB)	70	70	52
Operating Temp Range(Celsius)	-40 to 125	-40 to 85	-40 to 85	-40 to 85
	Samples	Samples	Samples	Samples
	Inventory	Inventory	Inventory	Inventory

Other qualified versions of OPA4684

Version	Part Number	Definition
Military	OPA4684M	QML certified for Military and Defense Applications

Customers Who Evaluated This Product Also Evaluated

PTH12050W: 1.2 to 5.5 V 6-A, 12-V Input Non-Isolated Wide-Adjust Module

TPS62410: 2.25MHZ 2x800mA Dual Step-Down Converter with 1-Wire Interface in QFN

DAC8871: 16-Bit Single Channel, Serial Interface, +/-18V (High Voltage Bipolar) Output DAC

Product Information

Features

MINIMAL BANDWIDTH CHANGE VERSUS GAIN
170MHz BANDWIDTH AT G = +2
>120MHz BANDWIDTH TO GAIN > +10
LOW DISTORTION: < –78dBc at 5MHz
HIGH OUTPUT CURRENT: 120mA
SINGLE +5V TO +12V SUPPLY OPERATION
DUAL ±2.5 TO ±6.0V SUPPLY OPERATION
LOW SUPPLY CURRENT: 6.8mA Total
APPLICATIONS
- LOW-POWER BROADCAST VIDEO DRIVERS
- EQUALIZING FILTERS
- SAW FILTER HIGH-GAIN POST AMPLIFIERS
- MULTICHANNEL SUMMING AMPLIFIERS
- WIDEBAND DIFFERENTIAL CHANNELS
- ANALOG-TO-DIGITAL CONVERTERS INPUT DRIVERS
- MULTIPLE POLE ACTIVE FILTERS
- OPA4658 LOW-POWER UPGRADE

All trademarks are the property of their respective owners.

Description

The OPA4684 provides a new level of performance in low-power, wideband, current-feedback (CFB) amplifiers. This CFB_PLUS amplifier is among the first to use an internally closed-loop input buffer stage that enhances performance significantly over earlier low-power CFB amplifiers. This new architecture provides many of the benefits of a more ideal CFB amplifier while retaining the benefits of very low power operation. The closed-loop input stage buffer gives a very low and linearized impedance path at the inverting input to sense the feedback error current. This improved inverting input impedance retains exceptional bandwidth to much higher gains and improves harmonic distortion over earlier solutions limited by inverting input linearity.

View All Description in Datasheet

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging			CAD Design Tools		Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Footprints	Samples
OPA4684ID	ACTIVE	-40 to 85	3.65 \| 1ku	SOIC (D) \| 14	View	50 \| TUBE
OPA4684IDG4	ACTIVE	-40 to 85	3.65 \| 1ku	SOIC (D) \| 14	View	50 \| TUBE
OPA4684IDR	ACTIVE	-40 to 85	3.30 \| 1ku	SOIC (D) \| 14	View	2500 \| LARGE T&R	Purchase Samples
OPA4684IDRG4	ACTIVE	-40 to 85	3.30 \| 1ku	SOIC (D) \| 14	View	2500 \| LARGE T&R	Purchase Samples
OPA4684IPWT	ACTIVE	-40 to 85	3.65 \| 1ku	TSSOP (PW) \| 14	View	250 \| SMALL T&R
OPA4684IPWTG4	ACTIVE	-40 to 85	3.65 \| 1ku	TSSOP (PW) \| 14	View	250 \| SMALL T&R

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 11:45 AM GMT, 22 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 20 WeeksOPA4684ID
Americas	Avnet	49
	Newark	46
	Rochester Electronics	>1k
Europe	Abacus Polar	>1k
Worldwide	DigiKey	101
Worldwide	Mouser Electronics	19
TI Lead Time*: 20 WeeksOPA4684IDG4
Europe	EBV Elektronik	29
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksOPA4684IDR
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksOPA4684IDRG4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksOPA4684IPWT
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	175
TI Lead Time*: 20 WeeksOPA4684IPWTG4
Worldwide	DigiKey	Available
View all Distributors

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
OPA4684ID	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
OPA4684IDG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
OPA4684IDR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
OPA4684IDRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
OPA4684IPWT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
OPA4684IPWTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for OPA4684

Datasheet

Quad, Low-Power, Current-Feedback Operational Amplifier (Rev. G) (PDF, 714 KB)
02 Jul 2008

Application Notes

Thermal and Electrical Properties of Selected Packaging Materials (HTM, 8 KB) 16050 views
04 Oct 2000 Read Abstract
Noise Analysis for High Speed Op Amps (Rev. A) (HTM, 9 KB) 7985 views
17 Jan 2005 Read Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (HTM, 8 KB) 27231 views
24 May 2004 Read Abstract
Expanding the usability of current-feedback amplifiers (PDF, 215 KB) 3383 views
28 Feb 2005
Active filters using current-feedback amplifiers (PDF, 227 KB) 4906 views
25 Feb 2005
RLC Filter Design for ADC Interface Applications (Rev. A) (HTM, 8 KB) 3170 views
05 Jan 2005 Read Abstract
AB-172: Current Feedback Amplifiers: Review, Stability Analysis,and Applications (HTM, 8 KB) 2067 views
20 Nov 2000 Read Abstract
Stabilizing Current-Feedback Amps (HTM, 8 KB) 1498 views
28 Apr 2004 Read Abstract
Measuring Board Parasitics in High-Speed Analog Design (HTM, 8 KB) 2058 views
07 Jul 2003 Read Abstract
Tuning in Amplifiers (HTM, 8 KB) 9059 views
02 Oct 2000 Read Abstract
ADS5500, OPA695: PC Board Layout for Low Distortion High-Speed ADC Drivers (HTM, 8 KB) 1902 views
22 Apr 2004 Read Abstract
Single-Supply Operation of Operational Amplifiers (HTM, 8 KB) 10790 views
02 Oct 2000 Read Abstract
Op Amp Performance Analysis (HTM, 8 KB) 7785 views
02 Oct 2000 Read Abstract
High Speed Data Conversion (HTM, 8 KB) 22549 views
02 Oct 2000 Read Abstract

User Guides

DEM-OPA-TSSOP-4A User's Guide (Rev. C) (PDF, 141 KB) 637 views
12 Aug 2008
DEM-OPA-SO-4A User's Guide (Rev. B) (PDF, 135 KB) 497 views
26 Nov 2008

Tools & Software

Name	Part #	Company	Tool / Software Type
Fully Differential Amplifier Component Calculator	FULLDIFFAMP-CALC	Texas Instruments	Calculation Utilities
Voltage Divider Determines A Set of Resistors for a Voltage Divider	VOLT-DIVIDER-CALC	Texas Instruments	Calculation Utilities
DEM-OPA468xD: Demonstration Board	DEM-OPA468XD	Texas Instruments	Development Boards/EVMs
DEM-OPA468xPW: Demonstration board	DEM-OPA468XPW	Texas Instruments	Development Boards/EVMs
FREE DEM-OPA-SO-4A	DEM-OPA-SO-4A	Texas Instruments	Development Boards/EVMs
FREE DEM-OPA-TSSOP-4A	DEM-OPA-TSSOP-4A	Texas Instruments	Development Boards/EVMs
SPICE-Based Analog Simulation Program	TINA-TI	Texas Instruments	Simulators
MDACBufferPro(TM) Output Buffer Amplifier Selection Tool	MDACBUFFERPRO	Texas Instruments	Application Software
Active Filter Design Application	FILTERPRO	Texas Instruments	Application Software

Simulation Models

PSpice Model
- OPAy684 PSpice Model (ZIP, 2 KB) 363 views
  13 Aug 2002
TINA-TI Reference Design
- OPA684 TINA-TI Reference Design (Rev. A) (TSC, 61 KB) 151 views
  18 Jan 2009
TINA-TI Spice Model
- OPA684 TINA-TI Spice Model (TSM, 7 KB) 36 views
  18 Jan 2009

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OPA4684 Status: ACTIVE

Quad, Low-Power, Current Feedback Operational Amplifier

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