Datasheet

ManualsBrandsANALOG DEVICES ManualsLinear ICsLinear IC - Op-amp Voltage feedback SOIC 8

Low Cost, High Performance

Voltage Feedback, 325 MHz Amplifier

Data Sheet

AD8057/AD8058

Rev. D Document Feedback

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FEATURES

Low cost single (AD8057) and dual (AD8058)

High speed

325 MHz, −3 dB bandwidth (G = +1)

1000 V/μs slew rate

Gain flatness: 0.1 dB to 28 MHz

Low noise

7 nV/√Hz

Low power

5.4 mA/amplifier typical supply current @ 5 V

Low distortion

−85 dBc @ 5 MHz, R

= 1 kΩ

Wide supply range from 3 V to 12 V

Small packaging

AD8057 is available in an 8-lead SOIC and 5-lead SOT-23

AD8058 is available in an 8-lead SOIC and an 8-lead MSOP

APPLICATIONS

Imaging

DVD/CD

Photodiode preamp

Analog-to-digital driver

Professional cameras filters

CONNECTION DIAGRAMS

+IN

–V

AD8057

–IN

OUT

(Not to Scale)

01064-001

Figure 1. RT-5 (SOT-23)

–IN

+IN

OUT

NC–V

AD8057

(Not to Scale)

NC = NO CONNECT

01064-002

Figure 2. R-8 (SOIC)

OUT1

–IN1

+IN1

–V

OUT2

–IN2

+IN2

(Not to Scale)

AD8058

01064-003

Figure 3. RM-8 (MSOP) and R-8 (SOIC)

GENERAL DESCRIPTION

The AD8057 (single) and AD8058 (dual) are very high perfor-

mance amplifiers with a very low cost. The balance between

cost and performance make them ideal for many applications.

The AD8057 and AD8058 reduce the need to qualify a variety

of specialty amplifiers. The AD8057 and AD8058 are voltage

feedback amplifiers with the bandwidth and slew rate normally

found in current feedback amplifiers. The AD8057 and AD8058

are low power amplifiers having low quiescent current and a wide

supply range from 3 V to 12 V. They have noise and distortion

performance required for high end video systems as well as dc

performance parameters rarely found in high speed amplifiers.

The AD8057 and AD8058 are available in standard SOIC

packaging as well as tiny 5-lead SOT-23 (AD8057) and 8-lead

MSOP (AD8058) packages. These amplifiers are available in the

industrial temperature range of −40°C to +85°C.

FREQUENCY (MHz)

100010

GAIN (dB)

100

–5

–1

–2

–3

–4

G = +2

G = +10

G = +5

G = +1

01064-004

Figure 4. Small Signal Frequency Response

Summary of content (17 pages)

PAGE 1
FEATURES CONNECTION DIAGRAMS Low cost single (AD8057) and dual (AD8058) High speed 325 MHz, −3 dB bandwidth (G = +1) 1000 V/μs slew rate Gain flatness: 0.1 dB to 28 MHz Low noise 7 nV/√Hz Low power 5.
PAGE 2
Powered by TCPDF (www.tcpdf.org) IMPORTANT LINKS for the AD8057_8058* Last content update 09/30/2013 12:50 am PARAMETRIC SELECTION TABLES DESIGN TOOLS, MODELS, DRIVERS & SOFTWARE Find Similar Products By Operating Parameters High Speed Amplifiers Selection Table dBm/dBu/dBv Calculator Analog Filter Wizard 2.
PAGE 3
AD8057/AD8058 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................6 Applications ....................................................................................... 1 Test Circuits ..................................................................................... 12 Connection Diagrams ...............................................
PAGE 4
Data Sheet AD8057/AD8058 SPECIFICATIONS @ TA = 25°C, VS = ±5 V, RL = 100 Ω, RF = 0 Ω, gain = +1, unless otherwise noted. Table 1. Parameter DYNAMIC PERFORMANCE –3 dB Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate Settling Time to 0.
PAGE 5
AD8057/AD8058 Data Sheet @ TA = 25°C, VS = 5 V, RL = 100 Ω, RF = 0 Ω, gain = +1, unless otherwise noted. Table 2. Parameter DYNAMIC PERFORMANCE –3 dB Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate Settling Time to 0.
PAGE 6
Data Sheet AD8057/AD8058 ABSOLUTE MAXIMUM RATINGS MAXIMUM POWER DISSIPATION Table 3. Lead Temperature (Soldering 10sec) 1 0.8 W 0.5 W 0.6 W ±VS ±4.0 V Observe power derating curves −65°C to +125°C −40°C to +85°C 2.0 TJ = 150°C 300°C Specification is for device in free air: 8-lead SOIC package: θJA = 160°C/W 5-lead SOT-23-5 package: θJA = 240°C/W 8-Lead MSOP package: θJA = 200°C/W Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device.
PAGE 7
AD8057/AD8058 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS 0 4.5 (+) OUTPUT VOLTAGE 4.0 –1.0 –2.5V SWING RL = 150Ω –1.5 ABS (–) OUTPUT VOLTS (V) 2.5 2.0 –2.0 –2.5 –3.0 1.5 –3.5 1.0 –4.0 0.5 –5V SWING RL = 150Ω –4.5 10 100 10k 1k LOAD RESISTANCE (Ω) 100k –5.0 –40 –30 –20 –10 01064-006 0 Figure 6. Output Swing vs. Load Resistance 0 10 20 30 40 TEMPERATURE (°C) 50 60 70 80 85 01064-009 OUTPUT VOLTAGE (V) 3.5 3.0 –1.5V SWING RL = 150Ω –0.5 Figure 9.
PAGE 8
Data Sheet AD8057/AD8058 0 100mV –0.1 –0.2 20mV/DIV IB (µA) –0.3 –0.4 +IB @ ±5V –0.7 –IB @ ±2.5V –IB @ ±5V +IB @ ±1.5V –IB @ ±1.5V –0.8 –40 –30 –20 –10 0 10 20 30 40 TEMPERATURE (°C) 50 60 70 80 85 01064-016 –0.6 +IB @ ±2.5V –100mV 01064-012 –0.5 4ns/DIV Figure 15. Small Signal Step Response G = +1, RL = 1 kΩ, VS = ±5 V, See Figure 41 for Test Circuit Figure 12. Input Bias Current vs. Temperature 4 5V 3 PSRR (mV/V) PSRR @ ±1.
PAGE 9
AD8057/AD8058 Data Sheet 5 5V 4 3 2 GAIN (dB) 1V/DIV 1 G = –2 G = –1 0 –1 –2 G = –5 –3 01064-020 –5V 4ns/DIV –5 1 Figure 21. Large Signal Frequency Response 5 0.5 4 0.4 3 0.3 2 0.2 1 0.1 GAIN (dB) GAIN (dB) Figure 18. Large Signal Step Response G = –1, RL = 1 kΩ , See Figure 42 for Test Circuit G = +1 0 1000 10 100 FREQUENCY (MHz) 01064-023 G = –10 –4 –1 VOUT = 0.2V G = +2 RL = 1.0kΩ RF = 1.0kΩ 0 –0.1 G = +5 –2 –0.2 G = +2 –3 –0.
PAGE 10
Data Sheet AD8057/AD8058 –40 VOUT = –1V TO + 1V OR +1V TO –1V G = +2 RL = 100Ω/1kΩ 0.4% 0.3% DISTORTION (dBc) –50 0.2% 20MHz 0.1% 0% –60 –0.1% –0.2% 5MHz –70 –0.3% 0 0.4 0.8 1.2 2.0 2.4 1.6 VOUT (V p-p) 3.2 2.8 3.6 4.0 0 01064-026 –80 Figure 24. Distortion vs. VOUT @ 20 MHz, 5 MHz, RL = 150 Ω, VS = ±5.0 V 10 20 30 40 50 TIME (ns) 4.5 2.5V 3.5 VS = ±2.5V RL = 1kΩ G = +1 INPUT SIGNAL OUTPUT RESPONSE 500mV/ DIV 3.0 2.5 2.0 0V FALL TIME 1.5 RISE TIME 1.
PAGE 11
AD8057/AD8058 Data Sheet 0 0 –10 –20 CROSSTALK (dB) CMRR (dB) –20 –30 –40 –40 –60 SIDE B DRIVEN –80 –50 SIDE A DRIVEN 1 10 FREQUENCY (MHz) 100 –120 0.1 01064-032 –70 0.1 Figure 30. CMRR vs. Frequency 10 FREQUENCY (MHz) 100 Figure 33. Crosstalk (Output-to-Output) vs. Frequency 1.8V OUTPUT SIGNAL 1.7V 1 01064-035 –100 –60 0.015 VS = ±2.5V R1 = 1kΩ G = +4 DIFFERENTIAL GAIN (%) 0.010 VS = ±5.0V RL = 150Ω 0.005 0 –0.005 200mV/ DIV –0.010 –0.015 INPUT SIGNAL = 0.
PAGE 12
Data Sheet AD8057/AD8058 100 135 60 90 40 45 GAIN 20 0 0 VNOISE (nV/√Hz) PHASE (Degrees) 80 10 1 0.1 1 10 FREQUENCY (MHz) 100 –90 1000 0.1 10 01064-038 –20 0.01 Figure 35. Open-Loop Gain and Phase vs. Frequency 0.01 100 1k 10k 100k FREQUENCY (Hz) 1M 10M 100M 10M 100M 01064-041 –45 Figure 38. Voltage Noise vs. Frequency DIFFERENTIAL GAIN (%) 100 VS = +5V RL = 150Ω 0 –0.01 –0.02 INOISE (pA/√Hz) –0.03 –0.04 –0.05 DIFFERENTIAL PHASE (Degrees) 0.14 0.12 0.10 0.08 0.06 0.
PAGE 13
AD8057/AD8058 Data Sheet TEST CIRCUITS 1kΩ +VS 4.7µF +VS 4.7µF 0.01µF AD8057 AD8058 HP8130A PULSE GENERATOR TR/TF = 1ns VOUT 0.001µF 1kΩ 0.001µF VIN 1kΩ 50Ω AD8057 AD8058 0.01µF 1kΩ 0.01µF 4.7µF –VS VOUT 0.001µF 4.7µF –VS Figure 42. Test Circuit, G = −1, RL = 1 kΩ Figure 41. Test Circuit, G = +1, RL = 1 kΩ Rev. D | Page 12 of 16 01064-018 VIN 50Ω 0.01µF 0.
PAGE 14
Data Sheet AD8057/AD8058 APPLICATIONS INFORMATION DRIVING CAPACITIVE LOADS When driving a capacitive load, most op amps exhibit overshoot in their pulse response. Figure 43 shows the relationship between the capacitive load that results in 30% overshoot and the closedloop gain of an AD8058. It can be seen that, under the gain = +2 condition, the device is stable with capacitive loads of up to 69 pF.
PAGE 15
AD8057/AD8058 Data Sheet 1kΩ Figure 47 shows a frequency sweep of this filter. The response is down 3 dB at 5.7 MHz; therefore, it passes the video band with little attenuation. The rejection at 27 MHz is 42 dB, which provides more than a factor of 100 in suppression of the clock components at this frequency. +5V 0.1µF 1kΩ VIN 0V 10 0.1µF 1kΩ 3 2 +2.5V + 10µF +5V + 10µF 8 50Ω 1 AD8058 REF VINA 1kΩ 0 1kΩ 1kΩ 6 1kΩ 5 –20 –30 AD8058 AD9225 VINB 4 –40 0.
PAGE 16
Data Sheet AD8057/AD8058 OUTLINE DIMENSIONS 3.20 3.00 2.80 5.15 4.90 4.65 5 8 3.20 3.00 2.80 1 4 PIN 1 IDENTIFIER 0.65 BSC 0.95 0.85 0.75 15° MAX 1.10 MAX 6° 0° 0.40 0.25 0.80 0.55 0.40 0.23 0.09 10-07-2009-B 0.15 0.05 COPLANARITY 0.10 COMPLIANT TO JEDEC STANDARDS MO-187-AA Figure 49. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters 5.00 (0.1968) 4.80 (0.1890) 1 5 4 1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 0.10 SEATING PLANE 6.20 (0.
PAGE 17
AD8057/AD8058 Data Sheet 3.00 2.90 2.80 1.70 1.60 1.50 5 1 4 2 3.00 2.80 2.60 3 0.95 BSC 1.90 BSC 1.45 MAX 0.95 MIN 0.15 MAX 0.05 MIN 0.50 MAX 0.35 MIN 0.20 MAX 0.08 MIN SEATING PLANE 10° 5° 0° 0.60 BSC 0.55 0.45 0.35 COMPLIANT TO JEDEC STANDARDS MO-178-AA 11-01-2010-A 1.30 1.15 0.90 Figure 51.