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LTC6090

6090fa

Typical applicaTion

FeaTures DescripTion

140V CMOS Rail-to-Rail

Output, Picoamp Input

Current Op Amp

The LTC

6090 is a high voltage precision operational

amplifier. The low noise, low bias current input stage is

ideal for high gain configurations. The LTC6090 has low

input offset voltage, a rail-to-rail output stage, and can be

run from a single 140V or split ±70V supplies.

The LTC6090 is internally protected against overtempera-

ture conditions. A thermal warning output, TFLAG, goes

active when the die temperature approaches 150°C. The

output stage can be turned off with the output disable pin

OD. By tying the OD pin to the thermal warning output,

the part will disable the output stage when it is out of the

safe operating area. These pins easily interface to any

logic family.

The LTC6090 is unity gain stable with up to a 200pF output

capacitor. A wide input and output common mode range

along with many features makes the LTC6090 useful for

many high voltage applications.

The LTC6090 is available in an 8-lead SO and 16-lead

TSSOP with exposed pad for low thermal resistance.

L, LT, LT C, LT M, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

140V

P-P

Sine Wave Output

applicaTions

Supply Range: ±4.75V to ±70V (140V)

0.1Hz to 10Hz Noise: 3.5μV

P-P

Input Bias Current: 50pA

Low Offset Voltage: 1.6mV Maximum

Rail-to-Rail Output Stage

Output Sink and Source 10mA

10MHz Gain Bandwidth Product

19V/µs Slew Rate

11nV/√Hz Noise Density

Thermal Shutdown

Available in Thermally Enhanced SOIC-8E or

TSSOP-16E Packages

ATE

Piezo Drivers

Photodiode Amplifier

High Voltage Regulators

Optical Networking

High Voltage DAC Buffer Application

OUT

= ±70V

6090 TA01a

–

LTC6090

453k

10pF

70V

–70V

16.2k

16.9k

REF

= 2.5V

LTC2641D

25µs/DIV

–20

–40

–60

–80

6090 TA01b

OUTPUT VOLTAGE (V)

Summary of content (24 pages)

PAGE 1
LTC6090 140V CMOS Rail-to-Rail Output, Picoamp Input Current Op Amp Description Features n n n n n n n n n n n Supply Range: ±4.75V to ±70V (140V) 0.1Hz to 10Hz Noise: 3.5μVP-P Input Bias Current: 50pA Low Offset Voltage: 1.6mV Maximum Rail-to-Rail Output Stage Output Sink and Source 10mA 10MHz Gain Bandwidth Product 19V/µs Slew Rate 11nV/√Hz Noise Density Thermal Shutdown Available in Thermally Enhanced SOIC-8E or TSSOP-16E Packages The LTC®6090 is a high voltage precision operational amplifier.
PAGE 2
LTC6090 Absolute Maximum Ratings (Note 1) Total Supply Voltage (V+ to V–)................................150V COM.................................................................... V– to V+ Input Voltage OD....................................................... V– to V+ + 0.3V +IN, –IN,................................... V– – 0.3V to V+ + 0.3V OD to COM..................................................... 0V to 6V Input Current +IN, –IN............................................................
PAGE 3
LTC6090 Order Information LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION JUNCTION TEMPERATURE RANGE LTC6090CS8E#PBF LTC6090CS8E#TRPBF 6090 8-Lead Plastic SO 0°C to 70°C LTC6090IS8E#PBF LTC6090IS8E#TRPBF 6090 8-Lead Plastic SO –40°C to 85°C LTC6090HS8E#PBF LTC6090HS8E#TRPBF 6090 8-Lead Plastic SO –40°C to 125°C LTC6090CFE#PBF LTC6090CFE#TRPBF 6090FE 16-Lead Plastic TSSOP 0°C to 70°C LTC6090IFE#PBF LTC6090IFE#TRPBF 6090FE 16-Lead Plastic TSSOP –40°C to 85°C LTC6
PAGE 4
LTC6090 Electrical Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C. Test conditions are V+ = 70V, V– = –70V, VCM = VOUT = 0V, VOD = Open unless otherwise noted.
PAGE 5
LTC6090 Typical Performance Characteristics AVOL and Phase vs Frequency PHASE 90 120 100 100 80 80 GAIN 60 70 40 60 20 50 0 40 –20 30 –40 0.1 1 10 100 1000 FREQUENCY (kHz) PHASE (DEG) GAIN (dB) 80 PSRR vs Frequency 140 VS = ±70V 80 60 20 0 0 0.1 1 10 100 1000 FREQUENCY (kHz) 140 500 400 100 0 20 –100 –200 –60 –40 –20 0 20 40 60 80 100 120 140 TEMPERATURE (°C) 1000 6090 G04 2.8 1.
PAGE 6
LTC6090 Typical Performance Characteristics Voltage Noise vs Frequency 0.1Hz to 10Hz Voltage Noise Large Signal Transient Response VOLTAGE NOISE DENSITY (nV/√Hz) 1000 AV = 10 VS = ±70V 100 OUTPUT NOISE 2µV/DIV OUTPUT 20V/DIV 10 1 0.001 0.01 0.
PAGE 7
LTC6090 Typical Performance Characteristics Input Bias Current vs Common Mode Voltage Input Bias Current vs Common Mode Voltage 4 1500 VS = ±70V TA = 25°C 0 TA = –40°C –2 500 0 –500 –1000 –4 –70 –50 –30 –10 0 10 30 50 INPUT COMMON MODE VOLTAGE (V) –50 –30 –10 0 10 30 50 INPUT COMMON MODE VOLTAGE (V) V+ VS = ±40V V+ – 0.2 SOURCE V+ – 0.4 V+ – 0.6 V+ – 0.8 V+ – 1.0 V – + 1.0 V – + 0.8 V – + 0.6 V – + 0.4 V – + 0.2 V– 0.001 TA = 125°C TA = 25°C TA = –40°C 0.01 SINK V – + 0.
PAGE 8
LTC6090 Typical Performance Characteristics Thermal Shutdown Hysteresis Open Circuit Voltage of COM, OD, TFLAG Output Slewing with AV = –10 3.0 100 OUTPUT 20V/DIV 2.5µs/DIV 6090 G29 80 2.0 PIN VOLTAGE (V) SUPPLY CURRENT (mA) 2.5 OD COM TFLAG V – = 0V OUTPUT 20V/DIV 1.5 1.0 60 40 20 0.5 0 162 164 166 168 170 172 174 176 178 JUNCTION TEMPERATURE (°C) 2.
PAGE 9
LTC6090 Block Diagram V+ V+ 2M 2M 10k COM 10k OD 1.
PAGE 10
LTC6090 Applications Information General Output Range The LTC6090 high voltage operational amplifier is designed in a Linear Technology proprietary process enabling a railto-rail output stage with a 140V supply while maintaining precision, low offset, and low noise. To get full benefit of the output drive, the feedback resistor should be chosen carefully. Consider an amplifier with AV = –50 and a 5k feedback resistor. A 1V input will cause the output to rise to 50V.
PAGE 11
LTC6090 Applications Information LTC6090 V+ V+ 2M 10k OD TO LOW VOLTAGE CONTROL OUT 10V/DIV V+ 2M 10k COM TIE TO LOW VOLTAGE GROUND 1ms/DIV Figure 2. Starting Up 2M LOW VOLTAGE SUPPLY V– 6090 F02 10k 500Ω 200k TO LOW VOLTAGE CONTROL TFLAG OD 2V/DIV 10k OUT 2V/DIV 30k V– 2.5ms/DIV 6090 F01 Figure 1. Low Voltage Interface 6090 F03 Figure 3. LTC6090 Output Disable Function For simplest shutdown operation, float the COM pin, and tie the OD pin to the TFLAG pin.
PAGE 12
LTC6090 Applications Information LTC6090 The guard ring completely encloses the high impedance node –IN. To simplify the PCB layout avoid using vias on this node. In addition, the solder mask should be pulled back along the guard ring exposing the metal. To help the spacing between nodes, one of the extra pins on the TSSOP package is used to route the guard ring behind the –IN pin.
PAGE 13
LTC6090 Applications Information Power Dissipation With a supply voltage of 140V it doesn’t take much current to consume a lot of power. Consider that 10mA at 140V consumes 1.4W of power and needs to be dissipated in a small plastic SO package. To aid in power dissipation both LTC6090 packages have exposed pads for low thermal resistance. The amount of metal connected to the exposed pad will lower the θJA of a package.
PAGE 14
LTC6090 Applications Information In order to avoid damaging the device, the absolute maximum junction temperature should not be exceeded (TJMAX = 150°C). Junction temperature is determined using the expression: TJ = PD • θJA + TA where PD is the power dissipated in the package, θJA is the package thermal resistance from ambient to junction and TA is the ambient temperature. For example, if the part has a 140V supply voltage with 2.
PAGE 15
LTC6090 Applications Information TOTAL HARMONIC DISTORTION + NOISE (%) 30 GAIN (dB) 20 10 0 –10 10 100 FREQUENCY (kHz) 1000 10 VS = ±70V AV = 5 RL = 10k CF = 30pF 1 0.1 VOUT = 100VP-P 0.01 0.001 VOUT = 50VP-P VOUT = 10VP-P 10 100 1000 10000 FREQUENCY (Hz) 6090 F09 Figure 9.
PAGE 16
LTC6090 Typical Applications Gain of 20 Amplifier with a 40mA Protected Output Driver Gain of 10 with Protected Output Current Doubler 200k 1% 40.2k 70V 47pF 2 VIN 2k 3 40.2k – 7 4 2k – BAV99 5 8 TF LTC6090 SD + 70V 22.1k 1% CZT5551 9 1k 6 + VIN 12.
PAGE 17
LTC6090 Typical Applications Audio Power Amplifier 50V 1N4148 40.2Ω 1nF 1N4148 100pF CZT5401 1k 33.2k IXTH50N20 100pF VTOP 7 2 1k 3 1nF 5 LTC6090 + 4 9 100pF 8 1 2.49k 6 1N4148 LT1166 VIN 1k 100k ILIM+ 0.1Ω 1µF 1µH VOUT 1µF 1N4148 0.1Ω ILIM– OUT 22nF 10Ω 20k 1k SENSE– 100k VBOTTOM 10k* 499k 499Ω 33.2k CZT5550 1nF 1N4148 IXTH24P20 100pF 1N4148 39.2Ω –50V 6090 TA06a * USE SEVERAL SERIES RESISTORS TO REDUCE DISTORTION (i.e. 5 × 2kΩ).
PAGE 18
LTC6090 Typical Applications High Current Pulse Amplifier 75pF 10k 70V 7 2 499k IN 3 10k – + 9 2SK1057 IHSM-3825 1µH 8 499Ω LTC6090 4 499k 1k 5 1 100Ω –70V OUT 2SJ161 6090 TA07 60V Step Response Into 10Ω 40 30 VOLTS 20 10 0 –10 –20 5µs/DIV 6090 TA07b 6090fa 18
PAGE 19
LTC6090 Typical Applications Simple 100W Audio Amplifier 50pF 2k 2k 2k 2k 2k 50V 100k 100Ω 2SK1057 100nF 7 2 499k 3 10k 5 4 499k 9 6.8k 8 LTC6090 + 6 IHSM-3825 1µH 1k 10k OUT BIAS 1 1k 6.8k 2SJ161 100nF 100Ω 2SJ161 100k –50V 6090 TA08a SET QUIESCENT SUPPLY CURRENT AT ABOUT 200mA WITH BIAS ADJUSTMENT. SET QUIESCENT CURRENT TO 100mA IF PARALLEL MOSFETs ARE NOT USED (FOR 8Ω OR HIGHER).
PAGE 20
LTC6090 Typical Applications Wide Common Mode Range 10x Gain Instrumentation Amplifier Typically <1mV Input-Referred Error 70V 7 3 +IN 2 + 5 8 LTC6090 – 4 9 6 22pF 10k* 1 100k 22pF 1 LT5400-2 100k 2 7 8 7 3 100k –70V 205k 70V 7 3 –IN 70V 2 + 4 3 100k 5 9 22pF 8 6 100k 10k* 6 2 5 4 LTC6090 – 24.9k 100k 9 + 5 8 LTC6090 – 4 9 6 1 49.9Ω OUT –3dB at 45kHz 22pF LTC6090 TA09 1 –70V * THESE RESISTORS CAN BE 0Ω IF INPUT SIGNAL SOURCE IMPEDANCES ARE <20MΩ.
PAGE 21
LTC6090 Package Description Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. FE Package 16-Lead Plastic TSSOP (4.4mm) (Reference LTC DWG # 05-08-1663 Rev J) FE Package 16-Lead Plastic TSSOP (4.4mm) Exposed Pad Variation BA (Reference LTC DWG # 05-08-1663 Rev J) Exposed Pad Variation BA 4.90 – 5.10* (.193 – .201) 2.74 (.108) 2.74 (.108) 16 1514 13 12 1110 6.60 ±0.10 4.50 ±0.10 9 2.74 (.108) 2.74 6.40 (.108) (.252) BSC SEE NOTE 4 0.45 ±0.05 1.
PAGE 22
LTC6090 Package Description Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. S8E Package 8-Lead Plastic SOIC (Narrow .150 Inch) Exposed Pad (ReferenceS8E LTC Package DWG # 05-08-1857 Rev Ø) 8-Lead Plastic SOIC (Narrow .150 Inch) Exposed Pad (Reference LTC DWG # 05-08-1857 Rev Ø) .189 – .197 (4.801 – 5.004) NOTE 3 .045 ±.005 .050 BSC 8 .245 MIN .030 ±.005 TYP .089 REF .160 ±.005 .118 REF 1 .010 – .020 × 45° (0.254 – 0.508) .053 – .069 (1.346 – 1.
PAGE 23
LTC6090 Revision History REV DATE DESCRIPTION A 11/12 Added ESD Statement. PAGE NUMBER 2 6090fa Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
PAGE 24
LTC6090 Typical Application Extended Dynamic Range 1MΩ Transimpedance Photodiode Amplifier 0.3pF 10M 1% IPD 125V 2 3 PHOTODIODE SFH213 – + 7 8 LTC6090 1 5 200k 1% 100mW 4 –3V VOUT 6 22.