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LTC6087/LTC6088

60878fc

Features

applications

Description

Dual/Quad 14MHz,

Rail-to-Rail CMOS Amplifiers

The LTC

6087/LTC6088 are dual/quad, low noise, low

offset, rail-to-rail input/output, unity-gain stable CMOS

operational amplifiers that feature 1pA of input bias current.

A 14MHz gain bandwidth and 7.2V/µs slew rate, combined

with low noise (10nV/√Hz) and a low 0.75mV offset, make

the LTC6087/LTC6088 useful in a variety of applications.

The 1.05mA supply current and the shutdown mode are

ideal for signal processing applications which demand

performance with minimal power.

The LTC6087/LTC6088 has an output stage which swings

within 30mV of either supply rail to maximize signal dy-

namic range in low supply applications. The input common

mode range includes the entire supply voltage. These op

amps are specified on power supply voltages of 3V and

5V from –40°C to 125°C.

The dual amplifier LTC6087 is available in 8-lead MSOP

and 10-lead DFN packages. The quad amplifier LTC6088

is available in 16-lead SSOP and DFN packages.

Single Supply Shock/Vibration Sensor Amplifier

Low Offset Voltage: 750µV Maximum

Low Offset Drift: 5µV/°C Maximum

Input Bias Current:

1pA (Typical at 25°C)

15pA (Typical at 85°C)

Rail-to-Rail Inputs and Outputs

Gain Bandwidth Product: 14MHz

CMRR: 70dB Minimum

PSRR: 93dB Minimum

Input Noise Voltage Density: 12nV/√Hz

Supply Current: 1.05mA per Amp

Shutdown Current: 2.3µA per Amp

2.7V to 5.5V Operation Voltage

Available in 8-Lead MSOP and 10-Lead DFN

Packages (LTC6087), 16-Lead SSOP and DFN

Packages (LTC6088)

Portable Test Equipment

Medical Equipment

Audio

Data Acquisition

High Impedance Transducer Amplifier

LTC6087 Input Bias Current

vs Temperature

L, LT, LT C and LT M are registered trademarks of Linear Technology Corporation. All other

trademarks are the property of their respective owners.

typical application

–

1/2 LTC6087

MURATA SHOCK

SENSOR

PKGS-00MX1

520pF, 0.57pC/g

www.murata.com

–

1/2 LTC6087

100k

60878 TA01a

OUT

570mV/g

16Hz TO 10kHz

= 2.7V TO 5.5V

0.1µF100k

100k

100M

100pF

TEMPERATURE (°C)

25 40

INPUT BIAS CURRENT (pA)

100

1000

= 5V

= 2.5V

55 70 85 100 115 130

60878 TA01b

Summary of content (16 pages)

PAGE 1
LTC6087/LTC6088 Dual/Quad 14MHz, Rail-to-Rail CMOS Amplifiers Features n n n n n n n n n n n n Description Low Offset Voltage: 750µV Maximum Low Offset Drift: 5µV/°C Maximum Input Bias Current: 1pA (Typical at 25°C) 15pA (Typical at 85°C) Rail-to-Rail Inputs and Outputs Gain Bandwidth Product: 14MHz CMRR: 70dB Minimum PSRR: 93dB Minimum Input Noise Voltage Density: 12nV/√Hz Supply Current: 1.05mA per Amp Shutdown Current: 2.3µA per Amp 2.7V to 5.
PAGE 2
LTC6087/LTC6088 Absolute Maximum Ratings (Note 1) Total Supply Voltage (V+ to V–)....................................6V Input Voltage....................................................... V– to V+ Input Current.........................................................±10mA SHDNA/SHDNB Voltage...................................... V– to V+ Output Short-Circuit Duration (Note 2)............. Indefinite Operating Temperature Range (Note 3) LTC6087C/LTC6088C...........................
PAGE 3
LTC6087/LTC6088 Order Information LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC6087CDD#PBF LTC6087HDD#PBF LTC6087CMS8#PBF LTC6087HMS8#PBF LTC6088CDHC#PBF LTC6088HDHC#PBF LTC6088CGN#PBF LTC6088HGN#PBF LTC6087CDD#TRPBF LTC6087HDD#TRPBF LTC6087CMS8#TRPBF LTC6087HMS8#TRPBF LTC6088CDHC#TRPBF LTC6088HDHC#TRPBF LTC6088CGN#TRPBF LTC6088HGN#TRPBF LCTX LCTX LTCTY LTCTY 6088 6088 6088 6088H 10-Lead (3mm × 3mm) Plastic DFN 10-Lead (3mm × 3mm) Plastic DFN 8-Lead Plastic M
PAGE 4
LTC6087/LTC6088 Electrical Characteristics The l denotes the specifications which apply over the full specified temperature range, otherwise specifications are at TA = 25°C. Test conditions are V+ = 3V, V– = 0V, VCM = 0.5V unless otherwise noted. C SUFFIX SYMBOL PARAMETER CONDITIONS AVOL Large-Signal Voltage Gain RLOAD = 10k, 0.5V ≤ VOUT ≤ 2.5V ISC Output Short-Circuit Current SR Slew Rate GBW Gain Bandwidth Product (fTEST = 20kHz) RLOAD = 50k, VCM = 1.
PAGE 5
LTC6087/LTC6088 Electrical Characteristics The l denotes the specifications which apply over the full specified temperature range, otherwise specifications are at TA = 25°C. Test conditions are V+ = 5V, V– = 0V, VCM = 0.5V unless otherwise noted. C SUFFIX H SUFFIX SYMBOL PARAMETER CONDITIONS MIN TYP MIN TYP CMRR 0V ≤ VCM ≤ 5V 84 70 66 84 l 70 68 dB dB 93 90 115 93 85 115 l dB dB PSRR Common Mode Rejection Ratio Power Supply Rejection Ratio VS = 2.7V to 5.
PAGE 6
LTC6087/LTC6088 Typical Performance Characteristics VOS Distribution VOS vs VCM 22 0.8 20 0.6 PERCENT OF UNITS (%) 0.4 VOS (mV) 8 6 4 0.2 0 –0.2 –0.4 –0.6 V = 5V S –0.8 TA = 25°C REPRESENTATIVE PARTS –1.0 0 0.5 1 1.5 2 2.5 3 VCM (V) 2 –1 –0.7 –0.4 –0.1 0.2 VOS (mV) 0.5 0.8 10 8 6 3.5 4 4.5 0 5 100 TA = 85°C TA = 25°C 1 0.1 –1.2 –0.4 0.4 1.2 2.0 DISTRIBUTION (µV/°C) 80 2.8 60878 G03 VS = 5V VCM = 2.5V TA = 25°C 90 TA = 125°C –2 0.
PAGE 7
LTC6087/LTC6088 Typical Performance Characteristics Open-Loop Gain vs Frequency 80 PER AMPLIFIER VCM = 0.5V 60 50 VS = 5V GAIN (dB) 1.1 VS = 3V 1.0 PHASE 0.9 0.8 40 40 GAIN 30 20 20 0 10 –20 0.7 0 0.6 –10 0.5 –40 –25 –10 5 20 35 50 65 80 95 110 125 TEMPERATURE (°C) –20 10k 100k 80 1M 10M FREQUENCY (Hz) 60 VS = 5V VCM = 2.5V TA = 25°C NEGATIVE SUPPLY 50 40 50 40 30 20 10 0 –10 10k 30 20 10 10k 100k 1M FREQUENCY (Hz) 10M 100M 10 AV = 10 1 AV = 2 AV = 1 0.1 0.
PAGE 8
LTC6087/LTC6088 Typical Performance Characteristics Disabled Output Impedance vs Frequency VS = 5V VCM = 1V AV = 1 TA = 25°C 10000 1000 100 10 1 RS = 50Ω 40 30 – + 10 10k 100k FREQUENCY (Hz) 1k 1M 0 10M VS = 5V 35 VCM = 2.5V AV = –1 30 RS = 10Ω 50 20 0.1 100 40 VS = 5V 70 VCM = 2.5V AV = 1 60 OVERSHOOT (%) OUTPUT IMPEDANCE (kΩ) 100000 15 CL – + RS CL RS = 50Ω 5 0 1000 100 CAPACITIVE LOAD (pF) 10 1 VS = 5V VCM = 2.
PAGE 9
LTC6087/LTC6088 Pin Functions OUT: Amplifier Output. SHDNA: Shutdown Pin of Amplifier A, active low and only available with the LTC 6087DD. An internal current source pulls the pin to V+ when floating. –IN: Inverting Input. +IN: Noninverting Input. SHDNB: Shutdown Pin of Amplifier B, active low and only available with the LTC 6087DD. An internal current source pulls the pin to V+ when floating. V+: Positive Supply. V–: Negative Supply. NC: Not internally connected Exposed Pad: Connected to V–.
PAGE 10
LTC6087/LTC6088 Applications Information Rail-to-Rail Output The output stage of the LTC6087/LTC6088 swings within 30mV of the supply rails when driving high impedance loads, in other words when no DC load current is present. See the Typical Performance Characteristics for curves of output swing versus load current. The class AB design of the output stage enables the op amp to supply load currents which are much greater than the quiescent supply current.
PAGE 11
LTC6087/LTC6088 Simplified Schematic V+ R1 M10 R2 M11 1µA M8 V– I1 V+ I2 VBIAS D4 C1 + – A1 M5 V+ +IN V+ D7 V+ D3 M1 OUTPUT CONTROL M6 M7 M2 D6 V– D8 –IN V– D5 D2 BIAS GENERATION SHDN OUT A2 + – V– C2 D1 NOTE: SHDN IS ONLY AVAILABLE V– IN THE DFN10 PACKAGE M9 M4 M3 R3 R4 V– 60878 SS Package Description Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
PAGE 12
LTC6087/LTC6088 Package Description Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. DD Package 10-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1699 Rev C) 0.70 ±0.05 3.55 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) PACKAGE OUTLINE 0.25 ±0.05 0.50 BSC 2.38 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 3.00 ±0.10 (4 SIDES) R = 0.125 TYP 6 0.40 ±0.10 10 1.65 ±0.10 (2 SIDES) PIN 1 NOTCH R = 0.20 OR 0.
PAGE 13
LTC6087/LTC6088 Package Description Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. GN Package 16-Lead Plastic SSOP (Narrow .150 Inch) (Reference LTC DWG # 05-08-1641 Rev B) .189 – .196* (4.801 – 4.978) .045 ±.005 16 15 14 13 12 11 10 9 .254 MIN .009 (0.229) REF .150 – .165 .229 – .244 (5.817 – 6.198) .0165 ±.0015 .150 – .157** (3.810 – 3.988) .0250 BSC RECOMMENDED SOLDER PAD LAYOUT 1 .015 ±.004 × 45° (0.38 ±0.10) .007 – .0098 (0.178 – 0.249) .
PAGE 14
LTC6087/LTC6088 Package Description Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. DHC Package 16-Lead Plastic DFN (5mm × 3mm) (Reference LTC DWG # 05-08-1706 Rev Ø) 0.65 ±0.05 3.50 ±0.05 1.65 ±0.05 2.20 ±0.05 (2 SIDES) PACKAGE OUTLINE 0.25 ± 0.05 0.50 BSC 4.40 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 5.00 ±0.10 (2 SIDES) R = 0.20 TYP 3.00 ±0.10 (2 SIDES) 9 R = 0.115 TYP 0.40 ±0.10 16 1.65 ±0.
PAGE 15
LTC6087/LTC6088 Revision History (Revision history begins at Rev C) REV DATE DESCRIPTION C 7/12 Corrected Supply Current value. PAGE NUMBER Provided VCM condition for GBW specification. 1 4, 5 60878fc Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use.
PAGE 16
LTC6087/LTC6088 Typical Applications Negative-Going and Positive-Going Photodiode TIAs on ±5V Supplies CF 2pF RF 100k 5V 1.5k 5V 1N4148 IPD + PHOTODIODE ~3pF VOUT 0V – IPD • RF 1/2 LTC6087 – IPD 5V – PHOTODIODE ~3pF + 1N4148 –5V RF –5V 100k 1.5k NOTE: DIFFERENT DEVICES. NOT THE SAME LTC6087 CF 2pF VOUT 0V + IPD • RF 1/2 LTC6087 60878 TA02 –5V Almost Rail-to-Rail (0.