Linear Technology Industrial Signal Chain User Manual

VOL 2

Industrial Signal Chain

High Performance Analog ICs

Industrial systems demand semiconductors that are precise, flexible

and reliable. Linear Technology offers a broad line of high performance

analog ICs that simplify system design with rugged devices featuring

parameters fully guaranteed over the -40°C to 85°C temperature range.

We back this up with knowledgeable applications support, long product

life cycles and superior on-time delivery.

This brochure spotlights recently released signal path ICs from

Linear Technology that are ideally suited for demanding industrial

applications, including:

•ADCs

•DACs

• Amplifiers

• Comparators

• Filters

• Voltage References

• RMS-to-DC Converters

• Silicon Oscillators

For the latest datasheets, application notes, software design tools and
interactive selection tables, visit www.linear.com.

I/H Grade Parts by Product Type

Linear Technology offers over 450

analog and mixed-signal base parts

specified from -40°C to 85°C or

beyond for the most demanding

industrial signal chain applications.

COMPARATOR, 29

AMPLIFIER, 170

OSCILLATOR, 9

REFERENCE, 12

FILTER, 13

MUX, 5

ADC, 162

DAC, 55

Industrial Signal Chain

AMPLIFIERS

Precision Amplifiers– pg 02
Low Bias Current Amplifiers–pg 03
Low Power Amplifiers–pg 04
Speed + Precision Amplifiers– pg 05
Instrumentation Amplifiers– pg 06
PGAs and Difference Amplifiers–pg 07
Current Sense Amplifiers– pg 08

ADCs

No Latency Delta-Sigma™ ADCs– pg 10
Easy Drive Delta-Sigma ADCs– pg 11
General Purpose SAR ADCs–pg 12
High Speed ADCs–pg 16
Signal Chain Modules–pg 17

FILTERS

ADC Drivers and Filters– pg 09

PRECISION REFERENCES–pg 20

DACs

Micropower Voltage Output–pg 18

SILICON OSCILLATORS–pg 21RMS-DC CONVERSION–pg 19

02

INDUSTRIAL SIGNAL CHAIN

PRECISION OPERATIONAL AMPLIFIERS

Precision Operational Amplifiers

Linear Technology's precision amplifiers combine DC accuracy with other critical features such as low noise, low power, small packages
and rail-to-rail inputs and outputs, making them useful in a wide range of applications.

®

1637

LT

.

Over-The-Top®: Operates with Inputs Above V +

.

Rail-to-Rail Input and Output

.

Micropower: 250µA Supply Current Max

.

Gain-Bandwidth Product: 1.1MHz

.

Slew Rate: 0.4V/µs

.

Low Input Offset Voltage: 350µV Max

.

Reverse Battery Protection to 25V

.

High CMRR: 110dB

.

Available in 8-Lead MSOP, PDIP and SO Packages;

plus a Tiny (3mm × 3mm × 0.8mm) DFN Package

Precision Op Amps

Switchable Precision Current Source

+

R*

LT1004-1.24.7µF

2k

+

LT1637

–

SHDN

*OPTIONAL FOR LOW OUTPUT CURRENTS,

R* = R

I

OUT

R

TP0610

4V TO 44V

1.2

=

I

OUT

R

e.g., 10mA = 1201

Amplifiers
per

Part No

LTC®2054/5 1/2 3 0.03 0.15 140 – 0.5 Out 0.15 2.7–7

LTC2050/1/2 1/2/4 3 0.03 0.075 140 – 3 Out 1.2 2.7–7

LTC2050/1/2HV 1/2/4 3 0.03 0.15 140 – 3 Out 1.5 2.7–12

LTC2054/5HV 1/2 5 0.03 0.15 140 – 0.5 Out 0.18 2.7–12

LTC1150/1 1/2 5 0.05 0.1 – – 2.5 – 1.5 4.75–32

LT1007 1 25 0.6 35 146 2.5 8 – 4 4–44

LTC6078/9 2/4 25 0.7 0.001 130 18 0.75 In/Out 0.072 2.7–5.5

LT6010 1 35 0.8 0.11 126 14 0.33 Out 0.15 2.7–40

LT1028 1 40 0.8 90 150 0.85 75 9.5 8–44

LT1881/2 2/4 50 0.8 0.2 124 14 1 Out 0.9 2.4–40

LT1884/5 2/4 50 0.8 0.4 124 9.5 2 Out 0.9 2.4–40

LT1991 1 50 1 5 – 46 0.56 In/Out 0.11 2.4–40

LT6011/2 2/4 60 0.8 0.3 126 14 0.33 Out 0.15 2.4–40

LT1677 1 60 1.5 20 146 3.2 7.2 In/Out 3.5 2.5–44

LTC6081/2 2/4 70 0.8 0.001 120 13 3.6 In/Out 0.425 2.7–5.5

LT1468/9 1/2 75 2 40 139 5 90 5 6–36

LT1678/9 2/4 100 3 20 130 3.9 20 In/Out 3.5 2.7–36

LTC6244HV 2 100 2.5 0.075 128 8 50 Out 7.4 2.8–10.5

LTC6241/2 2/4 125 2.5 0.075 124 7 18 Out 2.2 2.8–6

LTC6241/2HV 2/4 175 2.5 0.075 124 7 18 Out 2.2 2.8–11

LT1013/4 2/4 150 2 20 138 22 0.5 4–44

LTC6240 1 175 2.5 0.001 124 7 18 Out 2.4 2.8–6

LTC6240HV 1 250 2.5 0.001 129 7 18 Out 3.3 2.8–11

LT1637 1 350 3 50 118 27 1 In/Out 0.25 1.8–44

LT1800/1/2 1/2/4 350 5 250 99 8.5 80 In/Out 2 2.3–12.6

LT1494/5/6 1/2/4 375 2 1 114 185 0.003 In/Out 0.0015 2.1–36

LT1490/1A 2/4 500 4 8 124 50 0.18 In/Out 0.055 2–44

LT6003/4/5 1/2/4 500 5 0.09 114 325 0.002 In/Out 0.001 1.6–16

LT6202/3/4 1/2/4 500 24 7000 106 1.9 100 In/Out 3.5 2.5–12.6

LT1638/9 2/4 600 6 50 124 20 1.2 In/Out 0.23 2.2–44

LT6000/1/2 1/2/4 750 5 5 96 75 0.05 In/Out 0.016 1.8–18

LTC6087/8 2/4 750 5 1 typ 136 12 14 In/Out 1.3 2.7–6

LTC6084/5 2/4 750 5 1 typ 126 27 1.5 In/Out 0.13 2.5–6

Package

V

OS

Max 25°C
(µV)

VOS TC
Max
(µV/°C)

I

B

Max 25°C
(nA) A

VOL

(dB)

e

n

(nV/ Hz)
Ty p

GBW
(MHz)

Rail-to­Rail

IS/Amp
Max
(mA) V

SUPPLY

(V)

INDUSTRIAL SIGNAL CHAIN

Low Bias Current Operational Amplifiers

LOW BIAS CURRENT OPERATIONAL AMPLIFIERS

03

CMOS operational amplifiers are known for their low bias current and low power
operation. Linear Technology’s family of CMOS op amps combine these advantages with
high precision usually associated with bipolar amplifiers. The LTC6241 features peak-to­peak input referred noise of 550nV from 0.1Hz to 10Hz, allowing it to extract even the
tiniest of signals from high impedance sensors. The LTC6078 delivers extraordinary DC
precision at the lowest possible supply current, making it ideal for portable and loop­powered instrumentation applications.

LTC6078

.

Maximum Offset Voltage of 25µV (25°C)

.

Maximum Offset Drift of 0.7µV/°C

.

Maximum Input Bias:

1pA (25°C)
50pA ()85°C)

.

Micropower: 54µA per Amp

.

95dB CMRR (Min)

.

100dB PSRR (Min)

.

Input Noise Voltage: 16nV/ Hz

.

Rail-to-Rail Inputs and Outputs

.

2.7V to 5.5V Operation Voltage

Thermocouple Signal Conditioner

NORMALLY

FLOATING

OMEGA
5TC-TT-K-30-36
THERMOCOUPLE

SMT
1/4W
150k

SMT
1/4W
150k

LT1025

5V

K

0.1µF

40.6

µV/∞C

100pF

Input Bias vs Temperature

180

VS = 5V
V

= 2.5V

CM

160

140

120

100

80

60

40

INPUT BIAS CURRENT (pA)

20

0

0

TEMPERATURE ('C)

5V

+

1/2

LTC6078

–

1k

2.49M

10k

5.6pF

10025 50 75 125

OUT = 10mV/∞C
0∞C TO 500∞C ±0.5∞C

AMPLIFIER PROTECTED TO ±190V, ACCIDENTAL CONTACT

Low Bias Current Op Amps

V
Amplifiers
per

Products

LTC6078/9 2/4 25 0.7 1 18 0.75 0.05 0.072 2.7 to 6 MS-8, DFN/DFN, SSOP

LTC6081/2 2/4 70 0.8 1 13 3.6 1 0.425 2.7 to 5.5 MS-8, DFN/DFN, SSOP

LTC6240 1 175 2.5 1 7 18 10 2.4 2.8 to 6 SOT-23, SO-8

LTC6240HV 1 250 2.5 1 7 18 10 3.3 2.8 to 11 SOT-23, SO-8

LT1462/3 2/4 800 20 2 76 0.175 0.13 0.045 10 to 40 SO-8, DIP, SO-14

LT1057/8 2/4 450 10 50 13 5 14 2.5 8 to 40 SO-8, DIP, SO-16

LTC2050/1/2 1/2/4 3 0.03 75 – 3 2 1.2 2.7 to 12 SOT-23, DFN, MSOP, SO-8

LTC6244 2 100 2.5 75 8 50 35 7.4 2.8 to 6 MS-8, DFN

LTC6244HV 2 100 2.5 75 8 50 35 7.4 2.8 to 10.5 MS-8, DFN

LTC6241/2 2/4 125 2.5 75 7 18 10 2.2 2.8 to 6 DFN, SO-8/SSOP, DFN

LTC6241/2HV 2/4 175 2.5 75 7 18 10 2.2 2.8 to 11 DFN, SO-8/SSOP, DFN

LT6003/4/5 1/2/4 500 5 90 325 0.002 0.0008 1 1.6 to 16 SOT23-5, DFN/MS-8, TSSOP

LTC2054/5 2/4 3 0.03 150 – 0.5 0.5 150 2.7 to 6 SOT23-5, DFN-8, SO-8

LTC6084/5 2/4 750 5 1 typ 27 1.5 0.5 0.13 2.5 to 6 DFN-8, MS-8, DFN-16, SSOP-16

LTC6087/8 2/4 750 5 1 typ 12 14 7.2 1.3 2.7 to 5.5 MS-8, DFN/SSOP,DFN

Package

OS

Max

25°C

(µV)

TCV
Max
(µV/°C)

I

B

Max
25°C
(pA)

e

n

Ty p
(nV/ Hz)

OS

GBW
Ty p
(MHz)

SR
Ty p
(V/µs)

IS/Amp
Max
25°C
(mA) V

(V) Packages

SUPPLY

04

A

INDUSTRIAL SIGNAL CHAIN

Low Power Operational Amplifiers

LOW POWER OPERATIONAL AMPLIFIERS

Linear Technology’s family of low power precision operational amplifiers
are designed to maximize battery life and performance through a
combination of low operating current and wide supply range. These
products also maintain excellent precision required for the most
advanced handheld instruments.

LT6003

.

Wide Supply Range: 1.6V to 16V

.

Low Supply Current: 1µA/Amplifier Max

.

Low Input Bias Current: 90pA Max

.

Low Input Offset Voltage: 500µV Max

.

Low Input Offset Voltage Drift: 2µV/°C

.

A

Driving 20k Load: 100,000 Min

VOL

.

Capacitive Load Handling: 500pF

.

Specified from –40°C to 125°C

.

Tiny 2mm x 2mm DFN or SOT-23 Package

Micropower Oxygen Sensor

100k

OXYGEN SENSOR

TECHNOLOGY

CITY

4OX(2)

www.citytech.com

VOS Distribution

35

= 5V, 0V

V

S

= 2.5V

V

CM

30

MS8 PACKAGE
1377 AMPLIFIERS

25

20

15

10

PERCENT OF UNITS (%)

5

1%

100k

1%

100Ω
1%

10M

1%

LT6003

1.6V

V

OUT

I

SUPPLY

= 1V IN AIR

= 0.95µ

0

–400 –200 0 200 400 600–600

INPUT OFFSET VOLTAGE (µV)

Low Power Op Amps

Amplifiers
per

Part No

LT6003/4/5 1/2/4 0.001 0.5 0.09 325 0.002 1.6 to 16 In/Out SOT23-5, DFN-4, DFN-8,

LT1494/5/6 1/2/4 0.0015 0.375 1 185 0.0027 2.1 to 36 In/Out DIP-8, MS-8, SO-8, DIP-14,

LT1672/3/4 1/2/4 0.002 0.375 1 185 0.012 2.1 to 36 In/Out MS-8, SO-8, DIP-14, SO-14,

LT6000/1/2 1/2/4 0.016 0.6 5 75 0.05 1.8 to 18 In/Out DFN, MSOP, SSOP-16

LT1178/9 2/4 0.017 0.07 5 49 0.085 2 to 44 – SO-8, DIP, SO-16

LT2178/9 2/4 18 0.07 5 49 0.0175 2.2 to 44 – SO-8, SO-14

LT1462/3 2/4 0.045 0.8 0.002 76 0.175 10 to 40 – SO-8, SO-14, PDIP

LT2078/9 2/4 0.05 0.07 8 28 0.2 2.3 to 44 – SO-8, SO-14

LT1078/9 2/4 0.05 0.07 8 28 0.2 2.2 to 44 – SO-8, SO-16, PDIP

LTC2055HV 2 0.15 0.003 0.15 – 0.5 2.7 to 12 Out DFN-8, MS-8

LTC2054HV 1 0.175 0.003 0.15 – 0.5 2.7 to 12 Out SOT23-5

LT1635 1 0.2 1.3 4.5 50 0.175 1.1 to 14 Out DIP-8, SO-8

Package

IS/Amp

(mA)

Max VOS (mV) IB (nA)

e

n

(nV/ Hz)
Ty p

GBW
(MHz)
Ty p V

SUPPLY

Rail-to-

(V)

Rail Packages

MS-8, DFN-16, TSSOP-16

SO-14

SSOP-16

INDUSTRIAL SIGNAL CHAIN

Speed + Precision Operational Amplifiers

SPEED + PRECISION OPERATIONAL AMPLIFIERS

05

Linear Technology Speed + Precision Amplifiers offer an excellent
combination of high gain bandwidth product and fast slew rate, low noise
and high precision, making them an excellent choice in data acquisition
and high speed sensor conditioning applications.

LTC6244

.

Input Bias Current: 1pA (Typ at 25°C)

.

Low Offset Voltage: 100µV Max

.

Low Offset Drift: 2.5µV/°C Max

.

0.1Hz to 10Hz Noise: 1.5µV

.

Slew Rate: 40V/µs

.

Gain Bandwidth Product: 50MHz

.

Output Swings Rail-to-Rail

.

Supply Operation:

P-P

2.8V to 6V LTC6244

.

Low Input Capacitance: 2.1pF

Speed + Precision Operational Amplifiers

Very Low Noise Large Area Photodiode

0.25pF

5V

PHILIPS

BF862

JFET

4.99k

–5V

I

4.7µF*

4.99k

V

BB

HAMAMATSU LARGE

* CAN BE MICROPHONIC, FILM, X7R, IF NEEDED.

PD

PHOTODIODE

S1227-1010BQ

= 3000pF

C

PD

NUMBER OF UNITS

AREA

VOS Distribution

120

110

100

90

80

70

60

50

40

30

20

10

0

–60 –40

1M

5V

–

1/2

LTC6244HV

+

–5V

LTC6244MS8

= 5V, 0V

V

S

= 2.5V

V

CM

= 25∞C

T

A

INPUT OFFSET VOLTAGE (µV)

V

= 1M • I

OUT

BW = 350kHz
NOISE = 291nV AT 10kHz

V

OUT

–20

0

PD

20 40

60

Part No

Amplifiers
per
Package

GBW
Ty p
(MHz)

SR
Ty p
(V/µs)

V

OS

Max
(µV)

VOS TC
Max
(µV/°C)

IB Max
(nA)

Rail-to­Rail

e

n

(nV/ Hz)
Ty p

IS/Amp
Max
(mA) V

(V) Packages

SUPPLY

LT1806/7 1/2 325 125 550 5 4000 In/Out 3.5 13 2.5–12.6 SOT23-6, SO-8, MSOP-8

LT6230/1/2 1/2/4 215 70 500 3 10000 Out 1.1 3.75 3–12.6 SOT23-6, DFN-8, SO-8,

SSOP-16

LT6202/3/4 1/2/4 100 25 500 24 7000 In/Out 1.9 3.5 2.5–12.6 SOT23-6, DFN-8, SO-8,

MSOP-8, SO-14, SSOP-16

LT1468 /9 1/2 90 22 75 2 40 – 5 5 6–36 S0-8, PDIP

LT1800/1/2 1/2/4 80 25 350 5 250 In/Out 8.5 2 2.3–12.6 SOT23-5, DFN-8, SO-8,

MSOP-8, SO-14

LT1028 1 75 15 40 0.8 90 – 0.85 9.5 8–44 SO-8, PDIP

LT1037 1 60 15 25 0.6 35 – 2.5 4.3 8–44 SO-8, PDIP

LT6220/1/2 1/2/4 60 20 350 5 150 In/Out 10 1 2.2–12.6 SOT23-5, DFN-8, SO-8,

SSOP-16

LT6233/4/5 1/2/4 60 17 500 3 3000 Out 1.9 1.25 3–12.6 SOT23-6, DFN-8, SO-8,

SSOP-16

LTC6244HV 2 50 35 100 2.5 0.075 Out 8 7.4 2.8–10.5 DFN-8, MSOP-8

LT1630/1 2/4 30 9.2 525 5.5 1000 In/Out 6 4.4 2.6–36 SO-8, PDIP, SO-14

1215/6 2/4 23 30 300 2.5 500 – 12 6.6 2.5–36 SO-8, PDIP, SO-14

LT1678/9 2/4 20 6 100 3 20 In/Out 3.9 3.4 3–36 SO-8, SO-14

LTC6241/2HV 2/4 18 10 125 2.5 0.075 Out 7 2.2 2.8–11 DFN-8, SO-16, DFN-16,

SSOP-16

LTC6240HV 1 18 10 175 2.5 0.001 Out 7 2.4 2.8–11 SOT23-5, SO-8

LTC6087/8 2/4 14 7.2 750 5 0.001 typ In/Out 12 1.3 2.7–5.5 DFN-10, MSOP-8,

DFN-16, SSOP-16

LT1124/5 2/4 12.5 4.5 70 1 20 – 2.7 2.75 8–44 SO-8, PDIP, SO-16

06

INDUSTRIAL SIGNAL CHAIN

Instrumentation Amplifiers

INSTRUMENTATION AMPLIFIERS

With very low DC offset along with high input impedance and high
excellent common mode rejection, Linear Technology’s in-amps are
designed to cover all ranges of applications where extreme precision
and stability of the circuit are required. Many of these, such as the
LTC2053 implement a zero-drift architecture, improving total system
precision and eliminating the need for post assembly trim. This family
of parts includes different gain-setting methods, including a single
gain setting resistor, two resistors (similar to an op amp) and digitally
programmable gain. From fixed gain to programmable gain, Linear
Technology offers a variety of instrumentation amplifiers, suited for
all your circuit needs.

LTC6915

.

14 Levels of Programmable Gain

0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024,
2048 or 4096

.

Parallel or Serial (SPI) Interface for Gain Setting

.

125dB CMRR Independent of Gain

.

Gain Accuracy: 0.075%

.

Maximum Offset Voltage: 10µV

.

Maximum Offset Drift: 50nV/°C

.

Rail-to-Rail Input/Output

.

2.7V to ±5.5V Supply Range

.

3mm x 4mm DFN, SSOP-16 Packages

Zero Drift, Precision Instrumentation Amplifier with Digitally
Programmable Gain

2.7V to ± 5V

Zero Drift

SERIAL/

PARALLEL

µP

+

–

LTC6915

x1

SERIAL/PARALLEL

RESISTOR

ARRAY

INTERFACE

+
–

OUT

SENSE

REF

LTC6915 Demo Board

V
Max

Gain

Device

LTC1100 10 or 100 10 2.8 104 1.8 4.75–18 SOW-16, PDIP Fixed Gain Zero Drift

LT1101 10 or 100 160 0.13 100 0.37 1.8–44 SOW-16, PDIP Fixed Gain Micropower Single Supply

LT1167 1–10k 40 1.3 126 1 4.6–40 SO-8, PDIP One R Set Gain Precision, Low Ib

LT1168 1–10k 40 0.53 126 0.4 4.6–40 SO-8, PDIP One R Set Gain Low Ib, Low Power

LT1789-1 1–1k 100 0.095 100 0.06 2.2–36 SO-8 One R Set Gain Precision, Micropower

LT1789-10 10–1k 160 0.095 98 0.025 2.2–36 SO-8 One R Set Gain Precision, Micropower

LT1920 1–10k 125 1.3 110 0.8 4.6–40 SO-8, PDIP One R Set Gain Precision

LTC2053 Any 10 1.3 105 0.2 2.7–11 MSOP-8, DFN-8 Two Rs Set Gain Zero Drift, RRIO

LTC2053­SYNC

LTC6800 Any 100 1.2 90 0.2 2.7–5.5 MSOP-8, DFN-8 Two Rs Set Gain Low Cost, Zero Drift,

LTC6915 1–4096 10 1.6 105 0.2 2.7–11 DFN-12, SSOP-16 Digital Gain Zero Drift, Serial/Parallel

Range

Any 10 1.3 105 0.2 2.7–11 MSOP-8, DFN-8 Two Rs Set Gain Zero Drift, Rail-to-Rail,

25°C
(µV)

Supply

OS

Current
Max 25°C
(mA)

CMRR
Min
25°C
(dB)

GBW
(MHz)

Supply
Voltage
(V) Package Gain Set Comments

Sync to External Clock

RRIO

Programmable