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PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

OPA2822

SBOS188E – MARCH 2001 – REVISED AUGUST 2008

DESCRIPTION

The OPA2822 offers very low 2.0nV/

√Hz

input noise in a

wideband, unity-gain stable, voltage-feedback architecture.

Intended for xDSL receiver applications, the OPA2822 also

supports this low input noise with exceptionally low harmonic

distortion, particularly in differential configurations. Adequate

output current is provided to drive the potentially heavy load

of a passive filter between this amplifier and the codec.

Harmonic distortion for a 2V

differential output operating

from +5V to +12V supplies is ≤ –100dBc through 1MHz input

frequencies. Operating on a low 4.8mA/ch supply current,

the OPA2822 can satisfy all xDSL receiver requirements

over a wide range of possible supply voltages—from a single

+5V condition, to ±5V, up to a single +12V design.

General-purpose applications on a single +5V supply will

benefit from the high input and output voltage swing available

on this reduced supply voltage. Low-cost precision integra-

tors for PLLs will also benefit from the low voltage noise and

offset voltage. Baseband I/Q receiver channels can achieve

almost perfect channel match with noise and distortion to

support signals through 5MHz with > 14-bit dynamic range.

FEATURES

● LOW INPUT NOISE VOLTAGE: 2.0nV/

√Hz

● HIGH UNITY GAIN BANDWIDTH: 500MHz

●

HIGH GAIN BANDWIDTH PRODUCT: 240MHz

● HIGH OUTPUT CURRENT: 90mA

● SINGLE +5V TO +12V OPERATION

● LOW SUPPLY CURRENT: 4.8mA/ch

Dual, Wideband, Low-Noise

Operational Amplifier

APPLICATIONS

● xDSL DIFFERENTIAL LINE RECEIVERS

● HIGH DYNAMIC RANGE ADC DRIVERS

● LOW NOISE PLL INTEGRATORS

● TRANSIMPEDANCE AMPLIFIERS

● PRECISION BASEBAND I/Q AMPLIFIERS

● ACTIVE FILTERS

FEATURES SINGLES DUALS TRIPLES

High Slew Rate OPA690 OPA2690 OPA3690

R/R Input/Output OPA353 OPA2353 —

1.3nV Input Noise OPA846 OPA2686 —

1.5nV Input Noise — THS6062 —

OPA2822 RELATED PRODUCTS

xDSL Driver

OPA2677

xDSL Receiver

500Ω

OPA2822

1kΩ

500Ω

n:1

1kΩ

2822

www.ti.com

All trademarks are the property of their respective owners.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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Summary of content (33 pages)

PAGE 1
OPA2822 OPA 282 2 SBOS188E – MARCH 2001 – REVISED AUGUST 2008 www.ti.com Dual, Wideband, Low-Noise Operational Amplifier FEATURES ● ● ● ● ● ● DESCRIPTION LOW INPUT NOISE VOLTAGE: 2.0nV/√Hz HIGH UNITY GAIN BANDWIDTH: 500MHz HIGH GAIN BANDWIDTH PRODUCT: 240MHz HIGH OUTPUT CURRENT: 90mA SINGLE +5V TO +12V OPERATION LOW SUPPLY CURRENT: 4.8mA/ch The OPA2822 offers very low 2.0nV/√Hz input noise in a wideband, unity-gain stable, voltage-feedback architecture.
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PACKAGE/ORDERING INFORMATION(1) SPECIFIED TEMPERATURE RANGE PACKAGE MARKING PRODUCT PACKAGE-LEAD PACKAGE DESIGNATOR OPA2822U SO-8 Surface-Mount D –40°C to +85°C OPA2822U OPA2822U Rails, 100 " " " " OPA2822U/2K5 Tape and Reel, 2500 MSOP-8 Surface-Mount DGK –40°C to +85°C D22 OPA2822E/250 Tape and Reel, 250 " " " " OPA2822E/2K5 Tape and Reel, 2500 " OPA2822E " ORDERING NUMBER TRANSPORT MEDIA, QUANTITY NOTE: (1) For the most current package and ordering information, see the Pa
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ELECTRICAL CHARACTERISTICS: VS = ±6V Boldface limits are tested at +25°C. RF = 402Ω, RL = 100Ω, and G = +2, (see Figure 1 for AC performance only), unless otherwise noted. OPA2822U, E TYP PARAMETER AC PERFORMANCE (see Figure 1) Small-Signal Bandwidth Gain-Bandwidth Product Bandwidth for 0.1dB Gain Flatness Peaking at a Gain of +1 Large-Signal Bandwidth Slew Rate Rise-and-Fall Time Settling Time to 0.02% 0.
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ELECTRICAL CHARACTERISTICS: VS = +5V Boldface limits are tested at +25°C. RF = 402Ω, RL = 100Ω to VS / 2, and G = +2, (see Figure 3 for AC performance only), unless otherwise noted. OPA2822U, E TYP +25°C(1) 0°C to 70°C(2) –40°C to +85°C(2) 105 13 130 102 11 110 100 10 105 90 2.7 85 3.2 80 3.3 –85 –87 –99 –103 2.1 1.5 –82 –83 –94 –98 2.3 1.9 –81 –82 –91 –95 2.4 2.0 90 ±0.3 ±1.3 81 –8 –16 ±100 ±400 VCM = +2.5V 1.2 3.8 110 1.5 3.5 85 VCM = +2.5V VCM = +2.5V 15  1 5 1.
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TYPICAL CHARACTERISTICS: VS = ±6V TA = +25°C, G = +2, RF = 402Ω, and RL = 100Ω, unless otherwise noted. NONINVERTING SMALL-SIGNAL FREQUENCY RESPONSE 3 6 G = +1 RF = 0Ω VO = 0.1VPP –3 G = +2 –6 –9 G = +5 –12 –15 G = +10 –18 –6 G = –5 –9 –12 G = –10 –15 See Figure 2 –24 0.5 1 10 100 500 0.5 1 10 Frequency (MHz) NONINVERTING LARGE-SIGNAL FREQUENCY RESPONSE INVERTING LARGE-SIGNAL FREQUENCY RESPONSE G = +2 6 VO = 0.1VPP 0 3 –3 Gain (dB) VO = 0.
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TYPICAL CHARACTERISTICS: VS = ±6V (Cont.) TA = +25°C, G = +2, RF = 402Ω, and RL = 100Ω, unless otherwise noted. HARMONIC DISTORTION vs LOAD RESISTANCE 1MHz HARMONIC DISTORTION vs SUPPLY VOLTAGE –85 VO = 2VPP f = 1MHz VO = 2VPP RL = 200Ω Harmonic Distortion (dBc) Harmonic Distortion (dBc) –85 –90 2nd-Harmonic –95 –100 3rd-Harmonic See Figure 1 2nd-Harmonic –95 3rd-Harmonic –100 See Figure 1 –105 ±2.5 ±3.0 ±3.
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TYPICAL CHARACTERISTICS: VS = ±6V (Cont.) TA = +25°C, G = +2, RF = 402Ω, and RL = 100Ω, unless otherwise noted. 2-TONE, 3rd-ORDER INTERMODULATION INTERCEPT INPUT VOLTAGE AND CURRENT NOISE DENSITY 60 10 Intercept Point (+dBm) Voltage Noise nV/√Hz Current Noise pA/√Hz 55 Voltage Noise 2nV/√Hz 45 40 PI 35 50Ω 1/2 OPA2822 102 50Ω 402Ω 103 104 105 106 1 107 10 20 Frequency (MHz) Frequency (Hz) CHANNEL-TO-CHANNEL CROSSTALK GAIN FLATNESS 0.50 Deviation from 6dB Gain (0.
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TYPICAL CHARACTERISTICS: VS = ±6V (Cont.) TA = +25°C, G = +2, RF = 402Ω, and RL = 100Ω, unless otherwise noted.
PAGE 9
TYPICAL CHARACTERISTICS: VS = ±6V (Cont.) TA = +25°C, G = +2, RF = 402Ω, and RL = 100Ω, unless otherwise noted. SETTLING TIME VIDEO DIFFERENTIAL GAIN/DIFFERENTIAL PHASE 0.25 RL = 100Ω VO = 2V step G = +2 0.25 Differential Phase (°) 0.15 0.10 0.05 0 –0.05 –0.10 Differential Gain (%) 0.20 –0.15 0.15 dP 0.10 0.05 –0.20 dG See Figure 1 0 –0.25 0 5 10 15 20 25 30 35 40 45 50 55 60 1 3 6 7 SUPPLY AND OUTPUT CURRENT vs TEMPERATURE 0 10x Input Offset Current –0.
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TYPICAL CHARACTERISTICS: VS = ±6V TA = +25°C, Differential Gain = 2, RF = 604Ω, and RL = 400Ω, unless otherwise noted. DIFFERENTIAL PERFORMANCE TEST CIRCUIT DIFFERENTIAL SMALL-SIGNAL FREQUENCY RESPONSE 6 +6V VO = 200mVPP 3 GD = +1 GD = +2 GD = 604Ω RG 1/2 OPA2822 RG VI Normalized Gain (dB) 0 604Ω RG RL 604Ω VO –3 GD = +5 –6 –9 GD = +10 –12 –15 –18 –21 –24 1/2 OPA2822 0.
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TYPICAL CHARACTERISTICS: VS = +5V TA = +25°C, G = +2, RF = 402Ω, and RL = 100Ω, unless otherwise noted. NONINVERTING SMALL-SIGNAL FREQUENCY RESPONSE 6 VO = 0.1VPP 6 G = +1 RF = 0Ω 0 G = +2 –3 –6 G = +5 –9 –12 G = +10 –15 –3 –6 G = –5 –9 –12 G = –10 –15 –18 –18 –21 –21 See Figure 3 0.5 1 See Figure 4 –24 –24 10 100 500 0.5 1 10 Frequency (MHz) 1.0 0.1 0.5 Small-Signal Left Scale 0 0 –0.1 –0.5 –0.2 –1.0 –0.3 –1.5 See Figure 3 –0.
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TYPICAL CHARACTERISTICS: VS = +5V (Cont.) TA = +25°C, G = +2, RF = 402Ω, and RL = 100Ω, unless otherwise noted.
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TYPICAL CHARACTERISTICS: VS = +5V TA = +25°C, Differential Gain = +2, RF = 604Ω, and RL = 400Ω, unless otherwise noted. DIFFERENTIAL PERFORMANCE TEST CIRCUIT DIFFERENTIAL SMALL-SIGNAL FREQUENCY RESPONSE 6 +5V 0.01µF VI 0.01µF 1/2 OPA2822 RG 0 GD = 604Ω RG Normalized Gain (dB) +2.5V 604Ω RL 604Ω RG GD = +1 VO = 200mVPP RL = 400Ω 3 VO GD = +2 –3 –6 GD = +5 –9 –12 GD = +10 –15 –18 –21 –24 1/2 OPA2822 0.5 +2.
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APPLICATIONS INFORMATION WIDEBAND NONINVERTING OPERATION The OPA2822 provides a unique combination of features in a wideband dual, unity-gain stable, voltage-feedback amplifier to support the extremely high dynamic range requirements of emerging communications technologies.
PAGE 15
To take full advantage of the OPA2822’s excellent DC input accuracy, the total DC impedance seen at of each of the input terminals must be matched to get bias current cancellation. For the circuit of Figure 2, this requires the grounded 309Ω resistor on the noninverting input. The calculation for this resistor value assumes a DC-coupled 50Ω source impedance along with RG and RM. While this resistor will provide cancellation for the input bias current, it must be well decoupled (0.
PAGE 16
The gain resistor (RG) is set to equal the feedback resistor (RF) at 604Ω to achieve the desired gain of –1 from VI to VO. A DC blocking capacitor is included in series with RG to reduce the DC gain for the noninverting input bias and offset voltages to +1. This places the VS/2 bias voltage at the output pin and reduces the output DC offset error terms. The signal input impedance is matched to the 50Ω source using the additional RM resistor set to 54.9Ω.
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ACTIVE FILTER APPLICATIONS As a low-noise, low-distortion, unity-gain stable, voltagefeedback amplifier, the OPA2822 provides an ideal building block for high-performance active filters. With two channels available, it can be used either as a cascaded 2-stage active filter or as a differential filter. Figure 6 shows a 6th-order bandpass filter cascaded with two 2nd-order Sallen-Key sections, with transmission zeroes along with a passive post filter made up of a high-pass and a low-pass section.
PAGE 18
HIGH DYNAMIC RANGE ADC DRIVER Numerous circuit approaches exist to provide the last stage of amplification before the ADC in high-performance applications. For very high dynamic range applications where the signal channel can be AC-coupled, the circuit shown in Figure 10 provides exceptional performance. Most very high performance ADCs > 12-bit performance require differential inputs to achieve the dynamic range.
PAGE 19
DESIGN-IN TOOLS ENI DEMONSTRATION BOARDS Two printed circuit boards (PCBs) are available to assist in the initial evaluation of circuit performance using the OPA2822 in its two package options. Both of these are offered free of charge as unpopulated PCBs, delivered with a user’s guide. The summary information for these fixtures is shown in Table III. 1/2 OPA2822 RS ERS RF √ 4kTRS TABLE III. Demonstration Fixtures by Package.
PAGE 20
Inverting operation offers some interesting opportunities to increase the available signal bandwidth. When the source impedance is matched by the gain resistor (Figure 10 for example), the signal gain is (1 + RF/RG) while the noise gain is (1 + RF/2RG). This reduces the noise gain almost by half, extending the signal bandwidth and increasing the loop gain. For instance, setting RF = 500Ω in Figure 10 will give a signal gain for the amplifier of 5V/V.
PAGE 21
As the Typical Characteristics show, until the fundamental signal reaches very high frequencies or power levels, the limit to SFDR will be 2nd-harmonic distortion rather than the negligible 3rd-harmonic component. Focusing then on the second harmonic, increasing the load impedance improves distortion directly. However, operating differentially offers the most significant improvement in even-order distortion terms.
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output signal and load but would, for a grounded resistive load, be at a maximum when the output is fixed at a voltage equal to half of either supply voltage (assuming equal bipolar supplies). Under this condition PDL = VS2/(4 • RL) where RL includes feedback network loading. Note that it is the power dissipated in the output stage and not in the load that determines internal power dissipation.
PAGE 23
well as a doubly-terminated line. If the input impedance of the destination device is low, there will be some signal attenuation due to the voltage divider formed by the series output into the terminating impedance. +V CC External Pin e) Socketing a high-speed part like the OPA2822 is not recommended.
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Revision History DATE REVISION PAGE SECTION 8/08 E 2 Abs Max Ratings 5/06 D 8 Typical Characteristics 19 Design-In Tools DESCRIPTION Changed Storage Temperature Range from −40°C to +125°C to −65°C to +125°C. Axis text change on, Closed-Loop Output Impedance vs Frequency. Demonstration fixture numbers changed. NOTE: Page numbers for previous revisions may differ from page numbers in the current version. 24 OPA2822 www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 (4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Top-Side Marking for that device. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
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PACKAGE MATERIALS INFORMATION www.ti.com 16-Aug-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant OPA2822E/250 VSSOP DGK 8 250 180.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 OPA2822E/2K5 VSSOP DGK 8 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 OPA2822U/2K5 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 16-Aug-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) OPA2822E/250 VSSOP DGK 8 250 210.0 185.0 35.0 OPA2822E/2K5 VSSOP DGK 8 2500 367.0 367.0 35.0 OPA2822U/2K5 SOIC D 8 2500 367.0 367.0 35.
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