Datasheet

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LT1806/LT1807

18067fc

TYPICAL APPLICATION

DESCRIPTION

325MHz, Single/Dual,

Rail-to-Rail Input and Output, Low Distortion,

Low Noise Precision Op Amps

The LT

1806/LT1807 are single/dual low noise rail-to-rail

input and output unity-gain stable op amps that feature a

325MHz gain-bandwidth product, a 140V/μs slew rate and

a 85mA output current. They are optimized for low voltage,

high performance signal conditioning systems.

The LT1806/LT1807 have a very low distortion of – 80dBc

at 5MHz, a low input referred noise voltage of 3.5nV/√Hz

and a maximum offset voltage of 550μV that allows them to

be used in high performance data acquisition systems.

The LT1806/LT1807 have an input range that includes

both supply rails and an output that swings within 20mV

of either supply rail to maximize the signal dynamic range

in low supply applications.

The LT1806/LT1807 maintain their performance for supplies

from 2.5V to 12.6V and are speciﬁ ed at 3V, 5V and ±5V

supplies. The inputs can be driven beyond the supplies

without damage or phase reversal of the output.

The LT1806 is available in an 8-pin SO package with the

standard op amp pinout and a 6-pin TSOT-23 package. The

LT1807 features the standard dual op amp pinout and is

available in 8-pin SO and MSOP packages.These devices

can be used as plug-in replacements for many op amps

to improve input/output range and performance.

FEATURES

APPLICATIONS

Low Voltage, High Frequency Signal Processing

Driving A/D Converters

Rail-to-Rail Buffer Ampliﬁ ers

Active Filters

Video Line Driver

Gain-Bandwidth Product: 325MHz

Slew Rate: 140V/μs

Wide Supply Range: 2.5V to 12.6V

Large Output Current: 85mA

Low Distortion, 5MHz: –80dBc

Low Voltage Noise: 3.5nV/√Hz

Input Common Mode Range Includes Both Rails

Output Swings Rail-to-Rail

Input Offset Voltage (Rail-to-Rail): 550μV Max

Common Mode Rejection: 106dB Typ

Power Supply Rejection: 105dB Typ

Unity-Gain Stable

Power Down Pin (LT1806)

Operating Temperature Range: –40°C to 85°C

Single in SO-8 and 6-Pin Low Proﬁ le (1mm)

ThinSOT™ Packages

Dual in SO-8 and 8-Pin MSOP Packages

–

1/2 LT1807

909Ω

49.9Ω

100Ω

C1 5.6pF

C2 5.6pF

–

1/2 LT1807

470pF

LT C

1420

PGA GAIN = 1

REF

= 4.096V

12 BITS

10Msps

+AV

–5V

18067 TA01

–AV

Gain of 20 Differential A/D Driver

FREQUENCY (MHz)

–120

AMPLITUDE (dB)

–100

–80

–60

–40

–20

1234

18067 TA02

= p5V

= 20

SAMPLE

= 10Msps

= 1.4086MHz

SFDR = 83dB

NONAVERAGED

= 200mV

P-P

4096 Point FFT Response

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other

trademarks are the property of their respective owners.

Summary of content (28 pages)

PAGE 1
LT1806/LT1807 325MHz, Single/Dual, Rail-to-Rail Input and Output, Low Distortion, Low Noise Precision Op Amps DESCRIPTION FEATURES n n n n n n n n n n n n n n n n Gain-Bandwidth Product: 325MHz Slew Rate: 140V/μs Wide Supply Range: 2.5V to 12.6V Large Output Current: 85mA Low Distortion, 5MHz: –80dBc Low Voltage Noise: 3.
PAGE 2
LT1806/LT1807 ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (V+ to V –) ............................. 12.6V Input Voltage (Note 2) .............................................. ±VS Input Current (Note 2) ..........................................±10mA Output Short-Circuit Duration (Note 3) ............ Indeﬁnite Operating Temperature Range (Note 4) ...– 40°C to 85°C Speciﬁed Temperature Range (Note 5) ....– 40°C to 85°C Junction Temperature ...........................................
PAGE 3
LT1806/LT1807 ELECTRICAL CHARACTERISTICS TA = 25°C. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply, unless otherwise noted. SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage ΔVOS Input Offset Voltage Shift VCM = V + VCM = V – VCM = V + (LT1806 SOT-23) VCM = V – (LT1806 SOT-23) VCM = V – to V+ VCM = V – to V+ (LT1806 SOT-23) VCM = V – to V+ Input Offset Voltage Match (Channel-to-Channel) (Note 10) IB ΔIB Input Bias Current VCM = V + VCM = V – + 0.
PAGE 4
LT1806/LT1807 ELECTRICAL CHARACTERISTICS TA = 25°C. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP ISC Short-Circuit Current VS = 5V VS = 3V ±35 ±30 ±85 ±65 IS Supply Current per Ampliﬁer ISHDN MAX UNITS mA mA 9 13 mA Disable Supply Current VS = 5V, VSHDN = 0.3V VS = 3V, VSHDN = 0.3V 0.40 0.22 0.9 0.7 mA mA SHDN Pin Current VS = 5V, VSHDN = 0.3V VS = 3V, VSHDN = 0.
PAGE 5
LT1806/LT1807 ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the 0°C < TA < 70°C temperature range. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply, unless otherwise noted. SYMBOL PARAMETER CONDITIONS Input Bias Current Match (Channel-to-Channel) (Note 10) VCM = V + – 0.2V VCM = V – + 0.4V VCM = V + – 0.2V VCM = V – + 0.4V VCM = V – + 0.4V to V+ – 0.2V MIN TYP MAX UNITS l l 0.03 0.05 1.5 3.5 μA μA l l 0.03 0.05 0.75 1.80 μA μA l 0.08 2.
PAGE 6
LT1806/LT1807 ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the –40°C < TA < 85°C temperature range. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS TYP MAX UNITS VOS Input Offset Voltage VCM = V + VCM = V – VCM = V + (LT1806 SOT-23) VCM = V – (LT1806 SOT-23) l l l l 200 200 200 200 800 800 950 950 μV μV μV μV VOS TC Input Offset Voltage Drift (Note 8) VCM = V + VCM = V – l l 1.
PAGE 7
LT1806/LT1807 ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the –40°C < TA < 85°C temperature range. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS TYP MAX UNITS ISHDN SHDN Pin Current VS = 5V, VSHDN = 0.3V VS = 3V, VSHDN = 0.3V l l MIN 170 120 450 400 μA μA Shutdown Output Leakage Current VSHDN = 0.3V l 1.
PAGE 8
LT1806/LT1807 ELECTRICAL CHARACTERISTICS TA = 25°C. VS = ±5V, VSHDN = open; VCM = 0V, VOUT = 0V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP CMRR Common Mode Rejection Ratio VCM = V – to V + 83 106 = V – to V + 77 106 CMRR Match (Channel-to-Channel) (Note 10) VCM V– Input Common Mode Range MAX UNITS dB dB V+ V Power Supply Rejection Ratio V + = 2.5V to 10V, V – = 0V 90 105 dB PSRR Match (Channel-to-Channel) (Note 10) V + = 2.
PAGE 9
LT1806/LT1807 ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the 0°C < TA < 70°C temperature range. VS = ±5V, VSHDN = open; VCM = 0V, VOUT = 0V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS TYP MAX UNITS VOS Input Offset Voltage VCM = V + VCM = V – VCM = V + (LT1806 SOT-23) VCM = V – (LT1806 SOT-23) l l l l 200 200 200 200 800 800 900 900 μV μV μV μV VOS TC Input Offset Voltage Drift (Note 8) VCM = V + VCM = V – l l 1.5 1.
PAGE 10
LT1806/LT1807 ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the −40°C < TA < 85°C temperature range. VS = ±5V, VSHDN = open; VCM = 0V, VOUT = 0V, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS TYP MAX UNITS VOS Input Offset Voltage VCM = V + VCM = V – VCM = V + (LT1806 SOT-23) VCM = V – (LT1806 SOT-23) l l l l 200 200 200 200 900 900 975 975 μV μV μV μV VOS TC Input Offset Voltage Drift (Note 8) VCM = V + VCM = V – l l 1.5 1.
PAGE 11
LT1806/LT1807 ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the −40°C < TA < 85°C temperature range. VS = ±5V, VSHDN = open; VCM = 0V, VOUT = 0V, unless otherwise noted. (Note 5) SYMBOL PARAMETER CONDITIONS tOFF Turn-Off Time VSHDN = 4.5V to 0.
PAGE 12
LT1806/LT1807 TYPICAL PERFORMANCE CHARACTERISTICS Supply Current per Amp vs Supply Voltage Offset Voltage vs Input Common Mode 5 500 400 300 OFFSET VOLTAGE (μV) 15 TA = 125°C 10 TA = 25°C TA = –55°C 200 TA = 25°C 100 0 –100 TA = –55°C –200 –300 0 0 1 2 3 4 5 6 7 8 9 10 11 12 TOTAL SUPPLY VOLTAGE (V) –500 10 OUTPUT SATURATION VOLTAGE (V) –2 –3 PNP ACTIVE VS = 5V, 0V VCM = 0V –4 –5 –6 –7 –8 –50 –35 –20 –5 10 25 40 55 TEMPERATURE (°C) 70 85 10 1 0.1 TA = 125°C 0.01 TA = –55°C 0.001 0.
PAGE 13
LT1806/LT1807 TYPICAL PERFORMANCE CHARACTERISTICS SHDN Pin Current vs SHDN Pin Voltage 20 VS = 5V, 0V 0 Open-Loop Gain 300 –80 TA = 25°C –100 TA = –55°C –120 200 INPUT VOLTAGE (μV) TA = 125°C –60 RL = 1k 100 0 –100 RL = 100Ω –200 200 0 –100 –300 –400 –400 –180 –500 –500 3 4 2 SHDN PIN VOLTAGE (V) 0 5 0.5 1.5 2.0 1.0 OUTPUT VOLTAGE (V) Warm-Up Drift vs Time (LT1806S8) Offset Voltage vs Output Current 300 OFFSET VOLTAGE (mV) 200 RL = 1k RL = 100Ω –200 40 TA = 125°C 1.
PAGE 14
LT1806/LT1807 TYPICAL PERFORMANCE CHARACTERISTICS 55 50 50 45 35 30 GAIN BANDWIDTH PRODUCT 350 30 350 250 250 1 2 3 4 5 6 7 8 TOTAL SUPPLY VOLTAGE (V) 9 GBW PRODUCT VS = p5V 400 300 0 Gain and Phase vs Frequency Gain vs Frequency (AV = 2) CL = 10pF 24 RL = 100Ω 135 18 15 90 12 12 6 9 45 30 PHASE VS = 3V 0 GAIN (dB) 180 60 PHASE VS = p5V CL = 10pF 18 RL = 100Ω 0 VS = p5V –45 0 –90 –12 –135 –18 –3 –180 –24 –6 –20 CL = 5pF RL = 100Ω –30 0.
PAGE 15
LT1806/LT1807 TYPICAL PERFORMANCE CHARACTERISTICS Series Output Resistor vs Capacitive Load Series Output Resistor vs Capacitive Load 50 VS = 5V, 0V 45 AV = 2 ROS = 20Ω 30 25 20 15 10 35 25 20 ROS = 20Ω 15 0 100 CAPACITIVE LOAD (pF) 1000 100 CAPACITIVE LOAD (pF) 10 1000 18067 G31 Distortion vs Frequency Distortion vs Frequency –40 AV = 1 VOUT = 2VP-P VS = p5V –50 –70 RL = 100Ω, 2ND RL = 100Ω, 3RD RL = 1k, 3RD –90 RL = 100Ω, 2ND –80 RL = 1k, 2ND –90 10 1 FREQUENCY (MHz) 10 4.
PAGE 16
LT1806/LT1807 TYPICAL PERFORMANCE CHARACTERISTICS ±5V Large-Signal Response ±5V Small-Signal Response 0V 0V VS = p5V 40ns/DIV FREQ = 1.92MHz AV = 1 RL = 1k VS = p5V 20ns/DIV FREQ = 4.48MHz AV = 1 RL = 1k 18067 G39 5V Large-Signal Response 18067 G40 5V Small-Signal Response 0V 0.5V VS = 5V, 0V 20ns/DIV FREQ = 5.
PAGE 17
LT1806/LT1807 APPLICATIONS INFORMATION Rail-to-Rail Characteristics The LT1806/LT1807 have input and output signal range that covers from negative power supply to positive power supply. Figure 1 depicts a simpliﬁed schematic of the ampliﬁer. The input stage is comprised of two differential ampliﬁers, a PNP stage Q1/Q2 and a NPN stage Q3/Q4 that are active over different ranges of common mode input voltage. The PNP differential pair is active between the negative supply to approximately 1.
PAGE 18
LT1806/LT1807 APPLICATIONS INFORMATION or 8-lead MSOP package. All packages have the V – supply pin fused to the lead frame to enhance the thermal conductance when connecting to a ground plane or a large metal trace. Metal trace and plated through-holes can be used to spread the heat generated by the device to the backside of the PC board.
PAGE 19
LT1806/LT1807 APPLICATIONS INFORMATION The maximum ambient temperature that the part is allowed to operate is: TA = TJ – (PD(MAX) • 105°C/W) = 150°C – (0.53W • 105°C/W) = 94°C To operate the device at higher ambient temperature, connect more metal area to the V – pin to reduce the thermal resistance of the package as indicated in Table 2. Input Offset Voltage The offset voltage will change depending upon which input stage is active and the maximum offset voltage is guaranteed to less than 550μV.
PAGE 20
LT1806/LT1807 APPLICATIONS INFORMATION The LT1806/LT1807’s input stages are also protected against large differential input voltages of 1.4V or higher by a pair of back-to-back diodes, D5/D8, that prevent the emitter-base breakdown of the input transistors. The current in these diodes should be limited to less than 10mA when they are active. The worst-case differential input voltage usually occurs when the input is driven while the output is shorted to ground in a unity gain conﬁguration.
PAGE 21
LT1806/LT1807 TYPICAL APPLICATIONS Driving A/D Converter The LT1806/LT1807 have 60ns settling time to 0.01% on a 2V step signal, and 20Ω output impedance at 100MHz, that makes them ideal for driving high speed A/D converters. With the rail-to-rail input and output, and low supply voltage operation, the LT1806/LT1807 are also desirable for single supply applications. As shown in the application on the front page of this data sheet, the LT1807 drives a 10Msps, 12-bit, LTC1420 ADC in a gain of 20.
PAGE 22
LT1806/LT1807 TYPICAL APPLICATIONS Single Supply Video Line Driver The LT1806/LT1807 are wideband rail-to-rail op amps with large output current that allows them to drive video signals in low supply applications. Figure 4 depicts a single supply video line driver with AC coupling to minimize the quiescent power dissipation. Resistors R1 and R2 are used to level-shift the input and output to provide the largest signal swing.
PAGE 23
LT1806/LT1807 TYPICAL APPLICATIONS Single 3V Supply, 4MHz, 4th Order Butterworth Filter Beneﬁting from a low voltage supply operation, low distortion and rail-to-rail output of LT1806/LT1807, a low distortion ﬁlter that is suitable for antialiasing can be built as shown in Figure 6. On a 3V supply, the ﬁlter built with LT1807 has a passband of 4MHz with 2.5VP-P signal and stopband that is greater than 70dB to frequency of 100MHz.
PAGE 24
LT1806/LT1807 TYPICAL APPLICATIONS 1MHz Series Resonant Crystal Oscillator with Square and Sinusoid Outputs edge and the crystal capacitance (middle trace of Figure 9). Sinusoid amplitude stability is maintained by the fact that the sine wave is basically a ﬁltered version of the square wave; the usual amplitude control loops associated with sinusoidal oscillators are not immediately necessary.1 One can make use of this sine wave by buffering and ﬁltering it, and this is the combined task of the LT1806.
PAGE 25
LT1806/LT1807 PACKAGE DESCRIPTION S6 Package 6-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1636) 0.62 MAX 2.90 BSC (NOTE 4) 0.95 REF 1.22 REF 3.85 MAX 2.62 REF 1.4 MIN 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE ID RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 – 0.45 6 PLCS (NOTE 3) 0.95 BSC 0.80 – 0.90 0.20 BSC 0.01 – 0.10 1.00 MAX DATUM ‘A’ 0.30 – 0.50 REF 0.09 – 0.20 (NOTE 3) 1.90 BSC S6 TSOT-23 0302 REV B NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3.
PAGE 26
LT1806/LT1807 PACKAGE DESCRIPTION MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660 Rev F) 0.889 p 0.127 (.035 p .005) 5.23 (.206) MIN 3.20 – 3.45 (.126 – .136) 0.42 p 0.038 (.0165 p .0015) TYP 3.00 p 0.102 (.118 p .004) (NOTE 3) 0.65 (.0256) BSC 8 7 6 5 0.52 (.0205) REF RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) 3.00 p 0.102 (.118 p .004) (NOTE 4) 4.90 p 0.152 (.193 p .006) DETAIL “A” 0o – 6o TYP GAUGE PLANE 1 0.53 p 0.152 (.021 p .006) DETAIL “A” 2 3 4 1.10 (.043) MAX 0.
PAGE 27
LT1806/LT1807 PACKAGE DESCRIPTION S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .189 – .197 (4.801 – 5.004) NOTE 3 .045 p .005 .050 BSC 8 .245 MIN 7 6 5 .160 p .005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) .030 p .005 TYP 1 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 s 45o (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 3 4 .053 – .069 (1.346 – 1.752) .004 – .010 (0.101 – 0.254) 0o– 8o TYP .016 – .050 (0.406 – 1.270) NOTE: 1.
PAGE 28
LT1806/LT1807 TYPICAL APPLICATION FET Input, Fast, High Gain Photodiode Ampliﬁer total output noise was below 1mVRMS measured over a 10MHz bandwidth. Table 4 shows results achieved with various values of RF and Figure 11 shows the time domain response with RF = 499k. Figure 10 shows a fast, high gain transimpedance ampliﬁer applied to a photodiode. A JFET buffer is used for its extremely low input bias current and high speed.