Datasheet

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LT1813/LT1814

18134fa

FEATURES

APPLICATIO S

DESCRIPTIO

TYPICAL APPLICATIO

Dual/Quad 3mA, 100MHz,

750V/µs Operational Amplifiers

The LT

1813/LT1814 are dual and quad, low power, high

speed, very high slew rate operational amplifiers with

excellent DC performance. The LT1813/LT1814 feature

reduced supply current, lower input offset voltage, lower

input bias current and higher DC gain than other devices

with comparable bandwidth. The circuit topology is a

voltage feedback amplifier with the slewing characteris-

tics of a current feedback amplifier.

The output drives a 100Ω load to ±3.5V with ±5V supplies.

On a single 5V supply, the output swings from 1.1V to 3.9V

with a 100Ω load connected to 2.5V. The amplifiers are

stable with a 1000pF capacitive load making them useful

in buffer and cable driver applications.

The LT1813/LT1814 are manufactured on Linear

Technology’s advanced low voltage complementary bipo-

lar process. The LT1813 dual op amp is available in

8-pin MSOP, SO and 3mm x 3mm low profile (0.8mm)

dual fine pitch leadless packages (DFN). The quad LT1814

is available in 14-pin SO and 16-pin SSOP packages. A

single version, the LT1812, is also available (see separate

data sheet).

■

100MHz Gain Bandwidth Product

■

750V/µs Slew Rate

■

3.6mA Maximum Supply Current per Amplifier

■

Tiny 3mm x 3mm x 0.8mm DFN Package

■

8nV/√Hz Input Noise Voltage

■

Unity-Gain Stable

■

1.5mV Maximum Input Offset Voltage

■

4µA Maximum Input Bias Current

■

400nA Maximum Input Offset Current

■

40mA Minimum Output Current, V

OUT

= ±3V

■

±3.5V Minimum Input CMR, V

= ±5V

■

30ns Settling Time to 0.1%, 5V Step

■

Specified at ±5V, Single 5V Supplies

■

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

■

Active Filters

■

Wideband Amplifiers

■

Buffers

■

Video Amplification

■

Communication Receivers

■

Cable Drivers

■

Data Acquisition Systems

Bandpass Filter with Independently Settable Gain, Q and f

Filter Frequency Response

, LTC and LT are registered trademarks of Linear Technology Corporation.

–

1/4 LT1814

GAIN =

–

1/4 LT1814

–

1/4 LT1814

BANDPASS

OUT

1/4 LT1814

1814 TA01

Q =

2πR

FREQUENCY (Hz)

OUTPUT MAGNITUDE (6dB/DIV)

1k 100k 1M 10M

1814 TA02

10k

R = 499Ω

R1 = 499Ω

= 475Ω

= 49.9Ω

= 499Ω

C = 3.3nF

= 100kHz

Q = 10

GAIN = 1

= ±5V

= 5V

P-P

DISTORTION:

2nd < –76dB

3rd < –90dB

ACROSS FREQ

RANGE

Summary of content (16 pages)

PAGE 1
LT1813/LT1814 Dual/Quad 3mA, 100MHz, 750V/µs Operational Amplifiers U FEATURES DESCRIPTIO ■ The LT®1813/LT1814 are dual and quad, low power, high speed, very high slew rate operational amplifiers with excellent DC performance. The LT1813/LT1814 feature reduced supply current, lower input offset voltage, lower input bias current and higher DC gain than other devices with comparable bandwidth.
PAGE 2
LT1813/LT1814 W W W AXI U U ABSOLUTE RATI GS (Note 1) Total Supply Voltage (V+ to V –) LT1813/LT1814 ................................................ 12.6V LT1813HV ........................................................ 13.5V Differential Input Voltage (Transient Only, Note 2) .. ±6V Input Voltage ............................................................ ±VS Output Short-Circuit Duration (Note 3) ........... Indefinite Operating Temperature Range ................
PAGE 3
LT1813/LT1814 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = ±5V, VCM = 0V, unless otherwise noted.
PAGE 4
LT1813/LT1814 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = ±5V, VCM = 0V, unless otherwise noted.
PAGE 5
LT1813/LT1814 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 5V, VCM = 2.5V, RL to 2.5V, unless otherwise noted.
PAGE 6
LT1813/LT1814 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 5V, VCM = 2.5V, RL to 2.5V, unless otherwise noted. (Note 8) SYMBOL PARAMETER CONDITIONS MIN TYP IOUT Maximum Output Current VOUT = 1.5V or 3.5V, 30mV Overdrive TA = 0°C to 70°C TA = – 40°C to 85°C ±35 ● ● ±25 ±20 ±17 mA mA mA ISC Output Short-Circuit Current VOUT = 2.
PAGE 7
LT1813/LT1814 U W TYPICAL PERFOR A CE CHARACTERISTICS Input Common Mode Range vs Supply Voltage Supply Current vs Temperature V+ 5 PER AMPLIFIER VS = ± 2.5V 2 1 –1.0 INPUT BIAS CURRENT (µA) INPUT COMMON MODE RANGE (V) VS = ± 5V 3 0 – 0.5 4 SUPPLY CURRENT (mA) Input Bias Current vs Common Mode Voltage –1.5 – 2.0 TA = 25°C ∆VOS < 1mV 2.0 1.5 1.0 TA = 25°C VS = ± 5V – 0.5 –1.0 –1.5 0.
PAGE 8
LT1813/LT1814 U W TYPICAL PERFOR A CE CHARACTERISTICS Output Short-Circuit Current vs Temperature Settling Time vs Output Step VS = ± 5V 100 4 SOURCE 3 SINK 90 2 1 0 –1 VS = ± 5V AV = –1 RF = 500Ω CF = 3pF 0.1% SETTLING –2 –3 –4 –5 100 0 125 5 20 15 10 25 SETTLING TIME (ns) 30 Gain and Phase vs Frequency –10 80 –20 60 ±2.5V 30 ±2.
PAGE 9
LT1813/LT1814 U W TYPICAL PERFOR A CE CHARACTERISTICS Power Supply Rejection Ratio vs Frequency GBW RL = 500Ω 90 GBW RL = 100Ω 70 45 PHASE MARGIN RL = 100Ω 40 PHASE MARGIN RL = 500Ω 0 1 2 4 5 3 SUPPLY VOLTAGE (±V) PHASE MARGIN (DEG) GAIN BANDWIDTH (MHz) TA = 25°C POWER SUPPLY REJECTION RATIO (dB) 100 110 TA = 25°C AV = 1 VS = ±5V 80 –PSRR +PSRR 60 40 20 1k 7 10k 1M 100k FREQUENCY (Hz) 10M Slew Rate vs Supply Voltage 60 40 20 0 100M 1k 300 200 TA =25°C AV = –1 V = ±5V 1000 RS
PAGE 10
LT1813/LT1814 U W TYPICAL PERFOR A CE CHARACTERISTICS 2ND HARMONIC RL = 100Ω –50 –60 3RD HARMONIC RL = 100Ω –70 –80 3RD HARMONIC RL = 500Ω –90 –100 100k 2ND HARMONIC RL = 500Ω 100 DIFFERENTIAL GAIN RL = 150Ω 0.4 90 0.3 80 DIFFERENTIAL GAIN RL = 1k 0.2 0.1 0.5 0 DIFFERENTIAL PHASE RL = 150Ω 0.4 0.3 0.
PAGE 11
LT1813/LT1814 U W U U APPLICATIO S I FOR ATIO Layout and Passive Components The LT1813/LT1814 amplifiers are more tolerant of less than ideal board layouts than other high speed amplifiers. For optimum performance, a ground plane is recommended and trace lengths should be minimized, especially on the negative input lead. Low ESL/ESR bypass capacitors should be placed directly at the positive and negative supply pins (0.01µF ceramics are recommended).
PAGE 12
LT1813/LT1814 U W U U APPLICATIO S I FOR ATIO Power dissipation is composed of two parts. The first is due to the quiescent supply current and the second is due to on-chip dissipation caused by the load current. The worst-case load induced power occurs when the output voltage is at 1/2 of either supply voltage (or the maximum swing if less than 1/2 the supply voltage).
PAGE 13
LT1813/LT1814 U TYPICAL APPLICATIO Filter Frequency Response 10 4MHz, 4th Order Butterworth Filter 0 –10 VOLTAGE GAIN (dB) 232Ω 274Ω VIN – 47pF 274Ω 220pF 562Ω 1/2 LT1813 + 470pF – 22pF –50 –60 –70 VOUT 1/2 LT1813 + –40 VS = ±5V VIN = 600mVP-P PEAKING < 0.12dB –80 –90 0.
PAGE 14
LT1813/LT1814 U PACKAGE DESCRIPTIO DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1698) R = 0.115 TYP 5 0.38 ± 0.10 8 0.675 ±0.05 3.5 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) 1.65 ± 0.10 (2 SIDES) 3.00 ±0.10 (4 SIDES) PACKAGE OUTLINE PIN 1 TOP MARK (DD8) DFN 0203 0.28 ± 0.05 4 0.28 ± 0.05 0.75 ±0.05 0.200 REF 0.50 BSC 2.38 ±0.05 (2 SIDES) 1 0.50 BSC 2.38 ±0.10 (2 SIDES) 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD NOTE: 1.
PAGE 15
LT1813/LT1814 U PACKAGE DESCRIPTIO 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 ±.005 .050 BSC 7 8 .245 MIN 5 6 .160 ±.005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) .030 ±.005 TYP 1 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° (0.254 – 0.508) 3 2 4 .053 – .069 (1.346 – 1.752) .008 – .010 (0.203 – 0.254) .004 – .010 (0.101 – 0.254) 0°– 8° TYP .016 – .050 (0.406 – 1.270) .
PAGE 16
LT1813/LT1814 U TYPICAL APPLICATIO Two Op Amp Instrumentation Amplifier R5 220Ω R1 10k R4 10k R2 1k R3 1k – 1/2 LT1813 – 1/2 LT1813 + – VOUT + VIN + ( ⎡ R4 ⎤ ⎡ ⎛ 1⎞ ⎛ R2 R3 ⎞ R2 + R3 GAIN = ⎢ ⎥ ⎢1 + ⎜ ⎟ ⎜ + ⎟ + R5 ⎣ R3 ⎦ ⎢⎣ ⎝ 2⎠ ⎝ R1 R4 ⎠ ) ⎤⎥ = 102 ⎥ ⎦ TRIM R5 FOR GAIN TRIM R1 FOR COMMON MODE REJECTION BW = 1MHz 1813/14 TA03 U PACKAGE DESCRIPTIO GN Package 16-Lead Plastic SSOP (Narrow .150 Inch) .045 ±.005 .189 – .196* (4.801 – 4.