LINEAR TECHNOLOGY LT6202, LT6203, LT6204 Technical data

查询LT6202CS5供应商

Ultralow 1.9nV/√Hz Noise, Low Power Op Amps

FEATURES

LT6202/LT6203/LT6204

Single/Dual/Quad 100MHz,

Rail-to-Rail Input and Output,

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DESCRIPTIO

■

Low Noise Voltage: 1.9nV/√Hz (100kHz)

■

Low Supply Current: 3mA/Amp Max

■

Gain Bandwidth Product: 100MHz

■

Dual LT6203 in Tiny DFN Package

■

Low Distortion: –80dB at 1MHz

■

Low Offset Voltage: 500µV Max

■

Wide Supply Range: 2.5V to 12.6V

■

Input Common Mode Range Includes Both Rails

■

Output Swings Rail-to-Rail

■

Common Mode Rejection Ratio 90dB Typ

■

Unity Gain Stable

■

Low Noise Current: 1.1pA/√Hz

■

Output Current: 30mA Min

■

Operating Temperature Range –40°C to 85°C

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APPLICATIO S

■

Low Noise, Low Power Signal Processing

■

Active Filters

■

Rail-to-Rail Buffer Amplifiers

■

Driving A/D Converters

■

DSL Receivers

■

Battery Powered/Battery Backed Equipment

The LT®6202/LT6203/LT6204 are single/dual/quad low
noise, rail-to-rail input and output unity gain stable op
amps that feature 1.9nV/√Hz noise voltage and draw only

2.5mA of supply current per amplifier. These amplifiers
combine very low noise and supply current with a 100MHz
gain bandwidth product, a 25V/µs slew rate, and are
optimized for low supply signal conditioning systems.

These amplifiers maintain their performance for supplies
from 2.5V to 12.6V and are specified at 3V, 5V and ±5V
supplies. Harmonic distortion is less than –80dBc at
1MHz making these amplifiers suitable in low power data
acquisition systems.

The LT6202 is available in the 5-pin SOT-23 and the 8-pin
SO, while the LT6203 comes in 8-pin SO and MSOP pack­ages with standard op amp pinouts. For compact layouts
the LT6203 is also available in a tiny fine line leadless
package (DFN), while the quad LT6204 is available in the
16-pin SSOP and 14-pin SO packages. These devices can
be used as plug-in replacements for many op amps to
improve input/output range and noise performance.

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

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TYPICAL APPLICATIO

Low Noise 4- to 2-Wire Local Echo Cancellation Differential Receiver

–

50Ω

1:1

50Ω

2k

••

2k

1k 1k

–

1/2 LT6203

+

+

1/2 LT6203

–

1k 1k

6203 TA01a

V

R

LINE
RECEIVER

LINE

DRIVER

1/2 LT1739

+

V

V

D

L

100Ω

LINE

+

1/2 LT1739

–

Line Receiver Integrated Noise 25kHz to 150kHz

5.0

4.5

)

4.0

RMS

3.5

3.0

2.5

2.0

1.5

1.0

INTEGRATED NOISE (µV

0.5
0

0

40

20 60

BANDWIDTH (kHz)

80

100

120

140

6203 • TA01b

160

620234fa

1

LT6202/LT6203/LT6204

WW

W

ABSOLUTE AXI U RATI GS

U

(Note 1)

Total Supply Voltage (V+ to V–) ............................ 12.6V

Input Current (Note 2) ........................................ ±40mA

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...........................................150°C

UUW

PACKAGE/ORDER I FOR ATIO

TOP VIEW

OUT 1

–

2

V

+IN 3

5-LEAD PLASTIC TSOT-23

T

= 150°C, θJA = 250°C/W

JMAX

–

+

S5 PACKAGE

5 V

4 –IN

+

Junction Temperature (DD Package) .................... 125°C

Storage Temperature Range ..................–65°C to 150°C

Storage Temperature Range

(DD Package) ........................................–65°C to 125°C

Lead Temperature (Soldering, 10 sec)..................300°C

TOP VIEW

NC

1

–IN

2

+IN

3

–

V

4

S8 PACKAGE

8-LEAD PLASTIC SO

T

= 150°C, θJA = 190°C/W

JMAX

–
+

8

NC

+

V

7

OUT

6

NC

5

ORDER PART

NUMBER

LT6202CS5

S5 PART

MARKING*

LTG6

LT6202IS5

TOP VIEW

+

V

1OUT A

–IN A

2

+IN A

8-LEAD (3mm × 3mm) PLASTIC DFN

UNDERSIDE METAL CONNECTED TO V

A

3

–

V

4

DD PACKAGE

T

= 125°C, θJA = 160°C/W

JMAX

ORDER PART

NUMBER

LT6203CDD

LT6203IDD

8

OUT B

7

–IN B

6

B

+IN B

5

–

DD PART

MARKING*

LAAP

OUT A

–IN A
+IN A

ORDER PART

NUMBER

LT6203CMS8

LT6203IMS8

*The temperature grades are identified by a label on the shipping container.

TOP VIEW

1

–

2

+

3

–

V

4

MS8 PACKAGE

8-LEAD PLASTIC MSOP

T

= 150°C, θJA = 250°C/W

JMAX

ORDER PART

NUMBER

LT6202CS8

LT6202IS8

+

8

V

7

OUT B

–

6

–IN B

+

5

+IN B

MS8 PART

MARKING

LTB2
LTB3

OUT A

1

2

–IN A

+IN A

–
+

3

–

4

V

S8 PACKAGE

8-LEAD PLASTIC SO

T

= 150°C, θJA = 190°C/W

JMAX

ORDER PART

NUMBER

LT6203CS8

LT6203IS8

S8 PART

MARKING

TOP VIEW

6202

6202I

V

8

OUT B

7

–

–IN B

6

+

+IN B

5

S8 PART

MARKING

6203

6203I

+

2

620234fa

TOP VIEW

S PACKAGE

14-LEAD PLASTIC SO

1
2
3
4
5
6
7

14
13
12
11
10

9
8

OUT A

–IN A
+IN A

V

+

+IN B
–IN B

OUT B

OUT D
–IN D
+IN D
V

–

+IN C
–IN C
OUT C

+

–

+

–

+
–

+
–

A

BC

D

UUW

PACKAGE/ORDER I FOR ATIO

LT6202/LT6203/LT6204

TOP VIEW

OUT A

1
2

–IN A
+IN A

+IN B
–IN B

OUT B

–

A

+

3

+

4

V

+

5

BC

–

6
7
8

NC

GN PACKAGE

16-LEAD NARROW PLASTIC SSOP

T

= 150°C, θJA = 135°C/W

JMAX

16

–

15

D

+

14
13

+

12

–

11
10

9

OUT D
–IN D
+IN D

–

V
+IN C
–IN C
OUT C
NC

ORDER PART

NUMBER

LT6204CGN
LT6204IGN

GN PART

MARKING

6204
6204I

T

= 150°C, θJA = 150°C/W

JMAX

ORDER PART

NUMBER

LT6204CS
LT6204IS

Consult LTC Marketing for parts specified with wider operating temperature ranges.

ELECTRICAL CHARACTERISTICS

TA = 25°C, VS =5V, 0V; VS = 3V, 0V; VCM = V

= half supply,

OUT

unless otherwise noted.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

I

B

∆I

B

I

OS

e

n

i

n

Input Offset Voltage VS = 5V, 0V, V

= Half Supply

CM

LT6203, LT6204, LT6202S8 0.1 0.5 mV
LT6202 SOT-23 0.1 0.7 mV

VS = 3V, 0V, V

= Half Supply

CM

LT6203, LT6204, LT6202S8 0.6 1.5 mV
LT6202 SOT-23 0.6 1.7 mV

VS = 5V, 0V, V

= V+ to V

CM

–

LT6203, LT6204, LT6202S8 0.25 2.0 mV
LT6202 SOT-23 0.25 2.2 mV

VS = 3V, 0V, V

= V+ to V

CM

–

LT6203, LT6204, LT6202S8 1.0 3.5 mV
LT6202 SOT-23 1.0 3.7 mV

Input Offset Voltage Match V
(Channel-to-Channel) (Note 6) V

Input Bias Current V

IB Shift V

= Half Supply 0.15 0.8 mV

CM
CM

CM

V

CM

V

CM

CM

+

= V– to V
= Half Supply –7.0 –1.3 µA

+

= V

–

= V
= V– to V

+

–8.8 –3.3 µA

0.3 1.8 mV

1.3 2.5 µA

4.7 11.3 µA

IB Match (Channel-to-Channel) (Note 6) 0.1 0.6 µA
Input Offset Current V

= Half Supply 0.12 1 µA

CM

+

V

= V

CM

–

V

= V

CM

0.07 1 µA

0.12 1.1 µA

Input Noise Voltage 0.1Hz to 10Hz 800 nV
Input Noise Voltage Density f = 100kHz, VS = 5V 2 nV/√Hz

f = 10kHz, VS = 5V 2.9 4.5 nV/√Hz

Input Noise Current Density, Balanced f = 10kHz, VS = 5V 0.75 pA/√Hz
Input Noise Current Density, Unbalanced 1.1 pA/√Hz

Input Resistance Common Mode 4 MΩ

Differential Mode 12 kΩ

P-P

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3

LT6202/LT6203/LT6204

ELECTRICAL CHARACTERISTICS

TA = 25°C, VS =5V, 0V; VS = 3V, 0V; VCM = V

= half supply,

OUT

unless otherwise noted.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

C

IN

A

VOL

CMRR Common Mode Rejection Ratio VS = 5V, V

PSRR Power Supply Rejection Ratio VS = 2.5V to 10V, V

V

OL

V

OH

I

SC

I

S

GBW Gain Bandwidth Product Frequency = 1MHz, VS = 5V 90 MHz
SR Slew Rate VS = 5V, AV = –1, RL = 1k, VO = 4V 17 24 V/µs
FPBW Full Power Bandwidth (Note 10) VS = 5V, V
t

S

Input Capacitance Common Mode 1.8 pF

Differential Mode 1.5 pF

Large Signal Gain VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS/2 40 70 V/mV

= 5V, VO = 1V to 4V, RL = 100 to VS/2 8.0 14 V/mV

V

S

= 3V, VO = 0.5V to 2.5V, RL = 1k to VS/2 17 40 V/mV

V

S

= V– to V

= 5V, V

S

= 3V, V

S

CM

= 1.5V to 3.5V 80 100 dB

CM

= V– to V

CM

= 1.5V to 3.5V 85 120 dB

CM

V
V

CMRR Match (Channel-to-Channel) (Note 6) VS = 5V, V

PSRR Match (Channel-to-Channel) (Note 6) VS = 2.5V to 10V, V

+

+

= 0V 60 74 dB

CM

= 0V 70 100 dB

CM

60 83 dB

56 80 dB

Minimum Supply Voltage (Note 7) 2.5 V
Output Voltage Swing LOW Saturation No Load 5 50 mV

(Note 8) I

= 5mA 85 190 mV

SINK

V

S

V

S

= 5V, I
= 3V, I

= 20mA 240 460 mV

SINK

= 15mA 185 350 mV

SINK

Output Voltage Swing HIGH Saturation No Load 25 75 mV
(Note 8) I

= 5mA 90 210 mV

SOURCE

V

S

V

S

= 5V, I
= 3V, I

= 20mA 325 600 mV

SOURCE

= 15mA 225 410 mV

SOURCE

Short-Circuit Current VS = 5V ±30 ±45 mA

V

= 3V ±25 ±40 mA

S

Supply Current per Amp VS = 5V 2.5 3.0 mA

= 3V 2.3 2.85 mA

V

S

= 3V

OUT

Settling Time 0.1%, VS = 5V, V

P-P

= 2V, AV = –1, RL = 1k 85 ns

STEP

1.8 2.5 MHz

The ● denotes the specifications which apply over 0°C < TA < 70°C temperature range. VS = 5V, 0V; VS = 3V, 0V;
V

= V

CM

= half supply, unless otherwise noted.

OUT

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

Input Offset Voltage VS = 5V, 0V, V

LT6203, LT6204, LT6202S8
LT6202 SOT-23

VS = 3V, 0V, V
LT6203, LT6204, LT6202S8
LT6202 SOT-23

VS = 5V, 0V, V

= Half Supply

CM

= Half Supply

CM

= V+ to V

CM

● 0.2 0.7 mV

● 0.2 0.9 mV

● 0.6 1.7 mV

● 0.6 1.9 mV

–

LT6203, LT6204, LT6202S8 ● 0.7 2.5 mV
LT6202 SOT-23

VS = 3V, 0V, V

= V+ to V

CM

–

● 0.7 2.7 mV

LT6203, LT6204, LT6202S8 ● 1.2 4.0 mV

● 1.2 4.2 mV

● 0.5 2.3 mV

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VOS TC Input Offset Voltage Drift (Note 9) V

Input Offset Voltage Match V
(Channel-to-Channel) (Note 6) V

LT6202 SOT-23

= Half Supply ● 3.0 9.0 µV/°C

CM

= Half Supply ● 0.15 0.9 mV

CM

= V– to V

CM

+

4

LT6202/LT6203/LT6204

ELECTRICAL CHARACTERISTICS

temperature range. VS = 5V, 0V; VS = 3V, 0V; V

CM

= V

The ● denotes the specifications which apply over 0°C < TA < 70°C

= half supply, unless otherwise noted.

OUT

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

I

B

∆I

B

Input Bias Current V

IB Shift V

= Half Supply ● –7.0 –1.3 µA

CM

+

V

CM

V

CM

CM

= V

–

= V
= V– to V

+

● 1.3 2.5 µA

● –8.8 –3.3 µA

● 4.7 11.3 µA

IB Match (Channel-to-Channel) (Note 6) ● 0.1 0.6 µA

I

OS

A

VOL

Input Offset Current V

= Half Supply ● 0.15 1 µA

CM

+

V

= V

CM

–

V

= V

CM

● 0.10 1 µA

● 0.15 1.1 µA

Large Signal Gain VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS/2 ● 35 60 V/mV

VS = 5V, VO = 1.5V to 3.5V, RL = 100 to VS/2 ● 6.0 12 V/mV
V

= 3V, VO = 0.5V to 2.5V, RL = 1k to VS/2 ● 15 36 V/mV

S

CMRR Common Mode Rejection Ratio VS = 5V, V

VS = 5V, V
V

= 3V, V

S

CMRR Match (Channel-to-Channel) (Note 6) VS = 5V, V

= V– to V

CM

= 1.5V to 3.5V ● 78 97 dB

CM

= V– to V

CM

= 1.5V to 3.5V ● 83 100 dB

CM

PSRR Power Supply Rejection Ratio VS = 3V to 10V, V

PSRR Match (Channel-to-Channel) (Note 6) VS = 3V to 10V, V

+

+

= 0V ● 60 70 dB

CM

= 0V ● 70 100 dB

CM

● 60 83 dB

● 56 75 dB

Minimum Supply Voltage (Note 7) ● 3.0 V

V

OL

V

OH

I

SC

Output Voltage Swing LOW Saturation No Load ● 5.0 60 mV
(Note 8) I

= 5mA ● 95 200 mV

SINK

I

= 15mA ● 260 365 mV

SINK

Output Voltage Swing HIGH Saturation No Load ● 50 100 mV
(Note 8) I

= 5mA ● 115 230 mV

SOURCE

V

= 5V, I

S

VS = 3V, I

= 20mA ● 360 635 mV

SOURCE

= 15mA ● 260 430 mV

SOURCE

Short-Circuit Current VS = 5V ● ±20 ±33 mA

VS = 3V ● ±20 ±30 mA

I

S

Supply Current per Amp VS = 5V ● 3.1 3.85 mA

V

= 3V ● 2.75 3.50 mA

S

GBW Gain Bandwidth Product Frequency = 1MHz ● 87 MHz
SR Slew Rate VS = 5V, AV = –1, RL = 1k, VO = 4V ● 15 21 V/µs
FPBW Full Power Bandwidth (Note 10) VS = 5V, V

OUT

= 3V

P-P

● 1.6 2.2 MHz

The ● denotes the specifications which apply over –40°C < TA < 85°C temperature range. VS = 5V, 0V; VS = 3V, 0V; V

CM

= V

OUT

= half

supply, unless otherwise noted. (Note 5)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

Input Offset Voltage VS = 5V, 0V, V

= Half Supply

CM

LT6203, LT6204, LT6202S8 ● 0.2 0.8 mV
LT6202 SOT-23

VS = 3V, 0V, V

CM

= Half Supply

● 0.2 1.0 mV

LT6203, LT6204, LT6202S8 ● 0.6 2.0 mV
LT6202 SOT-23

VS = 5V, 0V, V

CM

= V+ to V

–

● 0.6 2.2 mV

LT6203, LT6204, LT6202S8 ● 1.0 3.0 mV
LT6202 SOT-23

VS = 3V, 0V, V

CM

= V+ to V

–

● 1.0 3.5 mV

LT6203, LT6204, LT6202S8 ● 1.4 4.5 mV
LT6202 SOT-23 ● 1.4 4.7 mV

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5

LT6202/LT6203/LT6204

ELECTRICAL CHARACTERISTICS

temperature range. VS = 5V, 0V; VS = 3V, 0V; V

CM

= V

The ● denotes the specifications which apply over –40°C < TA < 85°C

= half supply, unless otherwise noted. (Note 5)

OUT

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VOS TC Input Offset Voltage Drift (Note 9) V

Input Offset Voltage Match V
(Channel-to-Channel) (Note 6) V

I

B

∆I

B

Input Bias Current V

IB Shift V

= Half Supply ● 3.0 9.0 µV/°C

CM

= Half Supply ● 0.3 1.0 mV

CM

= V– to V

CM

= Half Supply ● –7.0 –1.3 µA

CM

V

= V

CM

= V

V

CM

= V– to V

CM

+

+

–

+

● 0.7 2.5 mV

● 1.3 2.5 µA

● –8.8 –3.3 µA

● 4.7 11.3 µA

IB Match (Channel-to-Channel) (Note 6) ● 0.1 0.6 µA

I

OS

A

VOL

CMRR Common Mode Rejection Ratio VS = 5V, V

PSRR Power Supply Rejection Ratio VS = 3V to 10V, V

Input Offset Current V

= Half Supply ● 0.2 1 µA

CM

+

= V

V

CM

–

= V

V

CM

● 0.2 1.1 µA

● 0.2 1.2 µA

Large Signal Gain VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS/2 ● 32 60 V/mV

V

= 5V, VO = 1.5V to 3.5V, RL = 100 to VS/2 ● 4.0 10 V/mV

S

= 3V, VO = 0.5V to 2.5V, RL = 1k to VS/2 ● 13 32 V/mV

V

S

= V– to V

CM

= 5V, V

V

S

V

= 3V, V

S

CMRR Match (Channel-to-Channel) (Note 6) VS = 5V, V

= 1.5V to 3.5V ● 75 95 dB

CM

= V– to V

CM

= 1.5V to 3.5V ● 80 100 dB

CM

PSRR Match (Channel-to-Channel) (Note 6) VS = 3V to 10V, V

+

+

= 0V ● 60 70 dB

CM

= 0V ● 70 100 dB

CM

● 60 80 dB

● 56 75 dB

Minimum Supply Voltage (Note 7) ● 3.0 V

V

OL

V

OH

I

SC

I

S

Output Voltage Swing LOW Saturation No Load ● 670 mV
(Note 8) I

= 5mA ● 95 210 mV

SINK

= 15mA ● 210 400 mV

I

SINK

Output Voltage Swing HIGH Saturation No Load ● 55 110 mV
(Note 8) I

= 5mA ● 125 240 mV

SOURCE

V

S

V

S

= 5V, I
= 3V, I

= 15mA ● 370 650 mV

SOURCE

= 15mA ● 270 650 mV

SOURCE

Short-Circuit Current VS = 5V ● ±15 ±25 mA

= 3V ● ±15 ±23 mA

V

S

Supply Current per Amp VS = 5V ● 3.3 4.1 mA

= 3V ● 3.0 3.65 mA

V

S

GBW Gain Bandwidth Product Frequency = 1MHz ● 83 MHz
SR Slew Rate VS = 5V, AV = –1, RL = 1k, VO = 4V ● 12 17 V/µs
FPBW Full Power Bandwidth (Note 10) VS = 5V, V

OUT

= 3V

P-P

● 1.3 1.8 MHz

6

620234fa

LT6202/LT6203/LT6204

ELECTRICAL CHARACTERISTICS

TA = 25°C, VS = ±5V; VCM = V

= 0V, unless otherwise noted.

OUT

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

Input Offset Voltage LT6203, LT6204, LT6202S8

V

= 0V 1.0 2.5 mV

CM

+

V

= V

CM

–

V

= V

CM

2.6 5.5 mV

2.3 5.0 mV

LT6202 SOT-23
V

= 0V 1.0 2.7 mV

CM

+

V

= V

CM

–

V

= V

CM

Input Offset Voltage Match V
(Channel-to-Channel) (Note 6) V

I

B

∆I

B

Input Bias Current V

IB Shift V

= 0V 0.2 1.0 mV

CM

= V– to V

CM

= Half Supply –7.0 –1.3 µA

CM

V

= V

CM

V

= V

CM

= V– to V

CM

+

+

–

+

–9.5 –3.8 µA

2.6 6.0 mV

2.3 5.5 mV

0.4 2.0 mV

1.3 3.0 µA

5.3 12.5 µA

IB Match (Channel-to-Channel) (Note 6) 0.1 0.6 µA

I

OS

e

n

Input Offset Current V

Input Noise Voltage 0.1Hz to 10Hz 800 nV

= Half Supply 0.15 1 µA

CM

+

V

= V

CM

–

V

= V

CM

0.2 1.2 µA

0.35 1.3 µA

P-P

Input Noise Voltage Density f = 100kHz 1.9 nV/√Hz

f = 10kHz 2.8 4.5 nV/√Hz

i

n

Input Noise Current Density, Balanced f = 10kHz 0.75 pA/√Hz
Input Noise Current Density, Unbalanced 1.1 pA/√Hz

Input Resistance Common Mode 4 MΩ

Differential Mode 12 kΩ

C

IN

Input Capacitance Common Mode 1.8 pF

Differential Mode 1.5 pF

A

VOL

Large Signal Gain VO = ±4.5V, RL = 1k 75 130 V/mV

VO = ±2.5V, RL = 100 11 19 V/mV

CMRR Common Mode Rejection Ratio VCM = V– to V

+

65 85 dB

VCM = –2V to 2V 85 98 dB

CMRR Match (Channel-to-Channel) (Note 6) VCM = –2V to 2V 85 120 dB

PSRR Power Supply Rejection Ratio VS = ±1.25V to ±5V 60 74 dB

PSRR Match (Channel-to-Channel) (Note 6) VS = ±1.25V to ±5V 70 100 dB

V

OL

V

OH

I

SC

I

S

Output Voltage Swing LOW Saturation No Load 5 50 mV
(Note 8) I

= 5mA 87 190 mV

SINK

I

= 20mA 245 460 mV

SINK

Output Voltage Swing HIGH Saturation No Load 40 95 mV
(Note 8) I

= 5mA 95 210 mV

SOURCE

I

= 20mA 320 600 mV

SOURCE

Short-Circuit Current ±30 ±40 mA

Supply Current per Amp 2.8 3.5 mA
GBW Gain Bandwidth Product Frequency = 1MHz 70 100 MHz
SR Slew Rate AV = –1, RL = 1k, VO = 4V 18 25 V/µs
FPBW Full Power Bandwidth (Note 10) V
t

S

Settling Time 0.1%, V

OUT

= 3V

P-P

= 2V, AV = –1, RL = 1k 78 ns

STEP

1.9 2.6 MHz

dG Differential Gain (Note 11) AV = 2, RF = RG = 499Ω, RL = 2k 0.05 %
dP Differential Phase (Note 11) AV = 2, RF = RG = 499Ω, RL = 2k 0.03 DEG

620234fa

7

LT6202/LT6203/LT6204

ELECTRICAL CHARACTERISTICS

temperature range. VS = ±5V; V

CM

= V

= 0V, unless otherwise noted.

OUT

The ● denotes the specifications which apply over 0°C < TA < 70°C

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

Input Offset Voltage LT6203, LT6204, LT6202S8

V

= 0V ● 1.6 2.8 mV

CM

+

= V

V

CM

–

= V

V

CM

● 3.2 6.8 mV

● 2.8 5.8 mV

LT6202 SOT-23

= 0V ● 1.6 3.0 mV

V

CM

+

V

VOS TC Input Offset Voltage Drift (Note 9) V

Input Offset Voltage Match V

(Channel-to-Channel) (Note 6) V
I

B

∆I

B

Input Bias Current V

IB Shift V

= V

CM

–

= V

V

CM

= Half Supply ● 7.5 24 µV/°C

CM

= 0V ● 0.2 1.0 mV

CM

= V– to V

CM

= Half Supply ● –7.0 –1.4 µA

CM

= V

V

CM

V

= V

CM

= V– to V

CM

+

+

–

+

● 3.2 7.3 mV

● 2.8 6.3 mV

● 0.5 2.2 mV

● 1.8 3.6 µA

● –10 –4.3 µA

● 5.4 13 µA

IB Match (Channel-to-Channel) (Note 6) ● 0.15 0.7 µA
I

OS

A

VOL

CMRR Common Mode Rejection Ratio V

Input Offset Current V

= Half Supply ● 0.1 1 µA

CM

+

V

= V

CM

–

= V

V

CM

● 0.2 1.2 µA

● 0.4 1.4 µA

Large Signal Gain VO = ±4.5V, RL = 1k ● 70 120 V/mV

= ±2V, RL = 100 ● 10 18 V/mV

V

CMRR Match (Channel-to-Channel) (Note 6) V

O

= V– to V

CM

= –2V to 2V ● 83 95 dB

V

CM

= –2V to 2V ● 83 110 dB

CM

+

● 65 84 dB

PSRR Power Supply Rejection Ratio VS = ±1.5V to ±5V ● 60 70 dB

PSRR Match (Channel-to-Channel) (Note 6) VS = ±1.5V to ±5V ● 70 100 dB
V

OL

V

OH

I

SC

I

S

Output Voltage Swing LOW Saturation No Load ● 670 mV

(Note 8) I

= 5mA ● 95 200 mV

SINK

I

= 15mA ● 210 400 mV

SINK

Output Voltage Swing HIGH Saturation No Load ● 65 120 mV

(Note 8) I

= 5mA ● 125 240 mV

SOURCE

= 20mA ● 350 625 mV

I

SOURCE

Short-Circuit Current ● ±25 ±34 mA

Supply Current per Amp ● 3.5 4.3 mA
GBW Gain Bandwidth Product Frequency = 1MHz ● 95 MHz
SR Slew Rate AV = –1, RL = 1k, VO = 4V ● 16 22 V/µs
FPBW Full Power Bandwidth (Note 10) V

OUT

= 3V

P-P

● 1.7 2.3 MHz

The ● denotes the specifications which apply over –40°C < TA < 85°C temperature range. VS = ±5V; V

CM

= V

= 0V, unless otherwise

OUT

noted. (Note 5)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

Input Offset Voltage LT6203, LT6204, LT6202S8

= 0V ● 1.7 3.0 mV

V

CM

+

V

= V

CM

–

= V

V

CM

● 3.8 7.5 mV

● 3.5 6.6 mV

LT6202 SOT-23
V

= 0V ● 1.7 3.2 mV

CM

+

= V

V

CM

–

= V

V

CM

● 3.8 7.7 mV

● 3.5 6.7 mV

620234fa

8

LT6202/LT6203/LT6204

ELECTRICAL CHARACTERISTICS

temperature range. VS = ±5V; V

CM

= V

= 0V, unless otherwise noted. (Note 5)

OUT

The ● denotes the specifications which apply over –40°C < TA < 85°C

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VOS TC Input Offset Voltage Drift (Note 9) V

Input Offset Voltage Match V

(Channel-to-Channel) (Note 6) V
I

B

∆I

B

Input Bias Current V

IB Shift V

= Half Supply ● 7.5 24 µV/°C

CM

= 0V ● 0.3 1.0 mV

CM

= V– to V

CM

= Half Supply ● –7.0 –1.4 µA

CM

= V

V

CM

V

= V

CM

= V– to V

CM

+

+

–

+

● 0.6 2.5 mV

● 1.8 3.6 µA

● –10 –4.5 µA

● 5.4 13 µA

IB Match (Channel-to-Channel) (Note 6) ● 0.15 0.7 µA
I

OS

A

VOL

CMRR Common Mode Rejection Ratio V

Input Offset Current V

= Half Supply ● 0.15 1 µA

CM

+

V

= V

CM

–

= V

V

CM

● 0.3 1.2 µA

● 0.5 1.6 µA

Large Signal Gain VO = ±4.5V, RL = 1k ● 60 110 V/mV

= ±1.5V RL = 100 ● 6.0 13 V/mV

V

CMRR Match (Channel-to-Channel) (Note 6) V

O

= V– to V

CM

= –2V to 2V ● 80 95 dB

V

CM

= –2V to 2V ● 80 110 dB

CM

+

● 65 84 dB

PSRR Power Supply Rejection Ratio VS = ±1.5V to ±5V ● 60 70 dB

PSRR Match (Channel-to-Channel) (Note 6) VS = ±1.5V to ±5V ● 70 100 dB
V

OL

V

OH

I

SC

I

S

Output Voltage Swing LOW Saturation No Load ● 775 mV

(Note 8) I

= 5mA ● 98 205 mV

SINK

= 15mA ● 260 500 mV

I

SINK

Output Voltage Swing HIGH Saturation No Load ● 70 130 mV

(Note 8) I

= 5mA ● 130 250 mV

SOURCE

= 15mA ● 360 640 mV

I

SOURCE

Short-Circuit Current ● ±15 ±25 mA

Supply Current per Amp ● 3.8 4.5 mA
GBW Gain Bandwidth Product Frequency = 1MHz ● 90 MHz
SR Slew Rate AV = –1, RL = 1k, VO = 4V ● 13 18 V/µs
FPBW Full Power Bandwidth (Note 10) V

OUT

= 3V

P-P

● 1.4 1.9 MHz

Note 1: Absolute maximum ratings are those values beyond which the life
of the device may be impaired.

Note 2: Inputs are protected by back-to-back diodes and diodes to each
supply. If the inputs are taken beyond the supplies or the differential input
voltage exceeds 0.7V, the input current must be limited to less than 40mA.

Note 3: A heat sink may be required to keep the junction temperature
below the absolute maximum rating when the output is shorted
indefinitely.

Note 4: The LT6202C/LT6202I, LT6203C/LT6203I and LT6204C/LT6204I
are guaranteed functional over the temperature range of –40°C and 85°C.

Note 5: The LT6202C/LT6203C/LT6204C are guaranteed to meet specified
performance from 0°C to 70°C. The LT6202C/LT6203C/LT6204C are
designed, characterized and expected to meet specified performance from
–40°C to 85°C, but are not tested or QA sampled at these temperatures.

The LT6202I/LT6203I/LT6204I are guaranteed to meet specified
performance from –40°C to 85°C.

Note 6: Matching parameters are the difference between the two amplifiers
A and D and between B and C of the LT6204; between the two amplifiers
of the LT6203. CMRR and PSRR match are defined as follows: CMRR and
PSRR are measured in µV/V on the identical amplifiers. The difference is
calculated between the matching sides in µV/V. The result is converted to
dB.

Note 7: Minimum supply voltage is guaranteed by power supply rejection
ratio test.

Note 8: Output voltage swings are measured between the output and
power supply rails.

Note 9: This parameter is not 100% tested.
Note 10: Full-power bandwidth is calculated from the slew rate:

FPBW = SR/2πV

P

Note 11: Differential gain and phase are measured using a Tektronix
TSG120YC/NTSC signal generator and a Tektronix 1780R Video
Measurement Set. The resolution of this equipment is 0.1% and 0.1°. Ten
identical amplifier stages were cascaded giving an effective resolution of

0.01% and 0.01°.

620234fa

9

LT6202/LT6203/LT6204

INPUT OFFSET VOLTAGE (µV)

–800

0

NUMBER OF UNITS

10

20

30

40

–400 0

400

800

LT6202/03/04 G03

50

60

–600 –200

200

600

VS = 5V, 0V
S8

COMMON MODE VOLTAGE (V)

–1

–6

INPUT BIAS CURRENT (µA)

–4

–2

0

2

0123

LT6202/03/04 G06

456

TA = 125°C

TA = 25°C

TA = –55°C

VS = 5V, 0V

LOAD CURRENT (mA)

0.01

OUTPUT SATURATION VOLTAGE (V)

0.1

1

10

0.01 1 10 100

LT6202/03/04 G09

0.001

0.1

VS = 5V, 0V

TA = 125°C

TA = 25°C

TA = –55°C

UW

TYPICAL PERFOR A CE CHARACTERISTICS

VOS Distribution, VCM = V+/2 VOS Distribution, VCM = V

45

VS = 5V, 0V
S8

40

35

30

25

20

15

NUMBER OF UNITS

10

5

0

–150 –50 0 250

–250

INPUT OFFSET VOLTAGE (µV)

50 150

LT6202/03/04 G01

Supply Current vs Supply Voltage
(Both Amplifiers)

12

10

8

6

4

SUPPLY CURRENT (mA)

2

0

0610

TA = 125°C

TA = 25°C

TA = –55°C

24

TOTAL SUPPLY VOLTAGE (V)

81214

LT6202/03/04 G04

60

VS = 5V, 0V
S8

50

40

30

20

NUMBER OF UNITS

10

0

–600 –200

–400

–800

INPUT OFFSET VOLTAGE (µV)

Offset Voltage vs Input
Common Mode Voltage

2.0

1.5

1.0

0.5

0

OFFSET VOLTAGE (mV)

–0.5

–1.0

–1

01

INPUT COMMON MODE VOLTAGE (V)

TA = 125°C

TA = 25°C

TA = –55°C

+

600

400

LT6202/03/04 G02

VS = 5V, 0V
TYPICAL PART

LT6202/03/04 G05

800

200 1000

0

356

24

VOS Distribution, VCM = V

Input Bias Current vs
Common Mode Voltage

–

Input Bias Current vs Temperature

4

VS = 5V, 0V

3
2
1

0
–1
–2
–3

INPUT BIAS CURRENT (µA)

–4
–5

–6

–35 –5

–50

10

VCM = 5V

VCM = 0V

–20

10

TEMPERATURE (°C)

55

25 85

40

LT6202/03/04 G07

Output Saturation Voltage vs
Load Current (Output Low)

10

VS = 5V, 0V

1

TA = 125°C

0.1

0.01

OUTPUT SATURATION VOLTAGE (V)

70

0.001

0.01 1 10 100

TA = 25°C

TA = –55°C

0.1
LOAD CURRENT (mA)

LT6202/03/04 G08

Output Saturation Voltage vs
Load Current (Output High)

620234fa

UW

OUTPUT CURRENT (mA)

–80

–15

OFFSET VOLTAGE (mV)

–10

–5

0

5

–40 0

40

80

LT6202/03/04 G15

10

15

–60 –20

20

60

VS = ±5V

TA = 25°C

TA = –55°C

TA = 125°C

FREQUENCY (Hz)

10

0

NOISE VOLTAGE (nV√Hz)

5

15

20

25

1k

45

LT6202/03/04 G18

10

100 100k

30

35

40

10k

TA = 25°C

VS = 5V, 0V

NPN ACTIVE
V

CM

= 4.5V

BOTH ACTIVE
V

CM

= 2.5V

PNP ACTIVE
V

CM

= 0.5V

TYPICAL PERFOR A CE CHARACTERISTICS

Output Short-Circuit Current vs

Minimum Supply Voltage

10

8
6
4
2

TA = 25°C

0
–2
–4
–6

CHANGE IN OFFSET VOLTAGE (mV)

–8

–10

1

1.5 2.5 4 4.5

TA = 125°C

TA = –55°C

233.5

TOTAL SUPPLY VOLTAGE (V)

5

LT6202/03/04 G10

Power Supply Voltage

80

SOURCING

60

40

20

0

SINKING

–20

–40

–60

OUTPUT SHORT-CIRCUIT CURRENT (mA)

–80

2 2.5 3.5

1.5

TA = 125°C

3

POWER SUPPLY VOLTAGE (

TA = 125°C

TA = 25°C

TA = –55°C

TA = 25°C

TA = –55°C

4 4.5 5

LT6202/LT6203/LT6204

Open-Loop Gain

2.5

VS = 3V, 0V

2.0

TA = 25°C

1.5

1.0

±V)

LT6202/03/04 G11

0.5

0
–0.5
–1.0

INPUT VOLTAGE (mV)

–1.5
–2.0

–2.5

0

0.5
OUTPUT VOLTAGE (V)

1.0

RL = 100Ω

1.5 2.0

RL = 1k

2.5

LT6202/03/04 G12

3.0

2.5

2.0

1.5

1.0

0.5
0

–0.5
–1.0

INPUT VOLTAGE (mV)

–1.5
–2.0
–2.5

160

140

120

100

80

60

40

CHANGE IN OFFSET VOLTAGE (µV)

20

0

Open-Loop Gain

VS = 5V, 0V

TA = 25°C

RL = 100Ω

0

1234

OUTPUT VOLTAGE (V)

Warm-Up Drift vs Time
(LT6203S8)

TA = 25°C

VS = ±5V

VS = ±2.5V

20

0

VS = ±1.5V

80

100

40

60

TIME AFTER POWER-UP (s)

RL = 1k

LT6202/03/04 G13

120

140

LT6202/03/04 G16

5

160

Open-Loop Gain

2.5

2.0

1.5

1.0

0.5
0

–0.5
–1.0

INPUT VOLTAGE (mV)

–1.5
–2.0
–2.5

–3–4

–5

OUTPUT VOLTAGE (V)

–1–2

RL = 100Ω

12 4

0

Total Noise vs
Total Source Resistance

100

VS = ±2.5V
V

CM

f = 100kHz

10

1

TOTAL NOISE VOLTAGE (nV/√Hz)

0.1

10 1k 10k 100k

TOTAL SPOT NOISE

= 0V

AMPLIFIER SPOT
NOISE VOLTAGE

RESISTOR
SPOT
NOISE

100

TOTAL SOURCE RESISTANCE (Ω)

VS = ±5V

TA = 25°C

RL = 1k

3

LT6202/03/04 G14

LT6202/03/04 G17

Offset Voltage vs Output Current

5

Input NoiseVoltage vs Frequency

620234fa

11

LT6202/LT6203/LT6204

TIME (2s/DIV)

OUTPUT VOLTAGE (nV)

1200

1000

800

400

0

–400

–800

–1000

– 1200

LT6202/03/04 G20

VS = 5V, 0V
V

CM

= VS/2

UW

TYPICAL PERFOR A CE CHARACTERISTICS

Balanced Noise Current vs
Frequency

7

6

5

PNP ACTIVE
V

= 0.5V

CM

BOTH ACTIVE
V

10 1k 10k 100k

100

FREQUENCY (Hz)

BALANCED NOISE CURRENT (pA/√Hz)

4

3

2

1

0

CM

= 2.5V

BALANCED SOURCE
RESISTANCE

VS = 5V, 0V

= 25°C

T

A

NPN ACTIVE
V

= 4.5V

CM

LT6202/03/04 G19

Unbalanced Noise Current vs
Frequency

12

10

PNP ACTIVE

8

6

4

2

UNBALANCED NOISE CURRENT (pA/√Hz)

0

10 1k 10k 100k

= 0.5V

V

CM

100

UNBALANCED SOURCE
RESISTANCE

VS = 5V, 0V

= 25°C

T

A

BOTH ACTIVE

= 2.5V

V

CM

FREQUENCY (Hz)

NPN ACTIVE

= 4.5V

V

CM

LT6202/03/04 G19.1

0.1Hz to 10Hz Output
Voltage Noise

Gain Bandwidth and Phase
Margin vs Temperature Open-Loop Gain vs Frequency Open-Loop Gain vs Frequency

VS = ±5V

PHASE MARGIN

VS = 3V, 0V

120

100

80

60

40

GAIN BANDWITH (MHz)

–55

VS = ±5V

GAIN BANDWIDTH

0

–25

TEMPERATURE (°C)

VS = 3V, 0V

25 125

50

75 100

LT6202/03/04 G21

PHASE MARGIN (DEG)

90

80

70

60

80
70
60
50
40
30

GAIN (dB)

20
10

0
–10
–20

100k 10M 100M 1G

CL = 5pF

= 1k

R

L

= 0V

V

CM

PHASE

VS = 3V, 0V

GAIN

VS = 3V, 0V

1M

FREQUENCY (Hz)

VS = ±5V

VS = ±5V

LT6202/03/04 G22

120
100
80
60

PHASE (DEG)

40
20
0
–20
–40
–60
–80

80
70
60
50
40
30

GAIN (dB)

20
10

0
–10
–20

100k 10M 100M 1G

VCM = 4.5V

VS = 5V, 0V

= 5pF

C

L

= 1k

R

L

1M

PHASE

VCM = 4.5V

GAIN

VCM = 0.5V

FREQUENCY (Hz)

VCM = 0.5V

LT6202/03/04 G23

120
100
80
60

PHASE (DEG)

40
20
0
–20
–40
–60
–80

120

100

GAIN BANDWITH (MHz)

80

60

40

12

Gain Bandwidth and Phase Margin
vs Supply Voltage

TA = 25°C

= 1k

R

L

= 5pF

C

L

0

PHASE MARGIN

GAIN BANDWIDTH

24 8

TOTAL SUPPLY VOLTAGE (V)

6

10 12 14

LT6202/03/04 G24

90

80

PHASE MARGIN (DEG)

70

60

50

70

60

50

40

30

SLEW RATE (V/µs)

20

10

0

Slew Rate vs Temperature

AV = –1

= RG = 1k

R
R

VS = ±5V

–55

F

= 1k

L

VS = ±2.5V

–25 0

VS = ±2.5V

VS = ±5V

25 75

TEMPERATURE (°C)

RISING

FALLING

50 100 125

LT6202/03/04 G25

Output Impedance vs Frequency

1000

VS = 5V, 0V

100

AV = 10

10

AV = 2

1

OUTPUT IMPEDANCE (Ω)

0.1

0.01
100k 10M 100M

AV = 1

1M

FREQUENCY (Hz)

LT6202/03/04 G26

620234fa

UW

FREQUENCY (Hz)

10k

–100

DISTORTION (dBc)

–60

–50

–40

100k 1M 10M

LT6202/03/04 G34

–70

–80

–90

AV = 1
V

S

= ±2.5V

V

OUT

= 2V

(P-P)

RL = 1k, 3RD

RL = 1k, 2ND

RL = 100Ω, 3RD

RL = 100Ω, 2ND

TYPICAL PERFOR A CE CHARACTERISTICS

LT6202/LT6203/LT6204

Common Mode Rejection Ratio
vs Frequency

120

VS = 5V, 0V

= VS/2

V

CM

100

80

60

40

20

COMMON MODE REJECTION RATIO (dB)

0

100k 100M

10k 1M 10M 1G

FREQUENCY (Hz)

Series Output Resistor vs
Capacitive Load

40

VS = 5V, 0V

= 1

A

35

V

30

25

20

15

OVERSHOOT (%)

10

5

0

10

RS = 50Ω
RL = 50Ω

100 1000

CAPACITIVE LOAD (pF)

RS = 10Ω

RS = 20Ω

LT6202/03/04 G27

LT6202/03/04 G29

Channel Separation vs Frequency

–40

TA = 25°C

= 1

A

V

–50

V

= ±5V

S

–60

–70

–80

–90

VOLTAGE GAIN (dB)

–100

–110

–120

0.1

1 10 100

FREQUENCY (MHz)

Series Output Resistor vs
Capacitive Load

40

VS = 5V, 0V

= 2

A

V

35

30

25

20

15

OVERSHOOT (%)

10

5

0

10

CAPACITIVE LOAD (pF)

RS = 10Ω

RS = 20Ω

RS = 50Ω
RL = 50Ω

100 1000

LT6202/03/04 G27.1

LT6202/03/04 G30

Power Supply Rejection Ratio
vs Frequency

80

70

60

50

40

30

20

10

COMMON MODE REJECTION RATIO (dB)

0

10k

1k 100k 1M 100M

FREQUENCY (Hz)

NEGATIVE
SUPPLY

VS = 5V, 0V

= 25°C

T

A

V

CM

POSITIVE
SUPPLY

10M

Settling Time vs Output Step
(Noninverting)

200

VS = ±5V

= 1

A

V

T

= 25°C

A

150

100

SETTLING TIME (ns)

50

10mV

0

–4

–3 –2 –1 0

–

+

V

IN

1mV

OUTPUT STEP (V)

V

OUT

500Ω

1mV

1234

= VS/2

LT6202/03/04 G28

10mV

LT6202/03/04 G31

SETTLING TIME (ns)

Settling Time vs Output Step
(Inverting)

200

VS = ±5V

= –1

A

V

= 25°C

T

A

150

100

50

10mV

0

–4

V

IN

1mV

–3 –2 –1 0

OUTPUT STEP (V)

500Ω

–

+

500Ω

V

OUT

1mV

10mV

1234

LT6202/03/04 G32

Maximum Undistorted Output
Signal vs Frequency Distortion vs Frequency

10

AV = 2

9

)

P-P

OUTPUT VOLTAGE SWING (V

AV = –1

8

7

6

5

4

VS = ±5V

= 25°C

T

3

A

HD2, HD3 < –40dBc

2

10k

100k 1M 10M

FREQUENCY (Hz)

LT6202/03/04 G33

620234fa

13

LT6202/LT6203/LT6204

FREQUENCY (Hz)

10k

–100

DISTORTION (dBc)

–60

–50

–40

100k 1M 10M

LT6202/03/04 G37

–70

–80

–90

AV = 2
V

S

= ±5V

V

OUT

= 2V

(P-P)

RL = 100Ω, 3RD

RL = 100Ω, 2ND

RL = 1k, 3RD

RL = 1k, 2ND

UW

TYPICAL PERFOR A CE CHARACTERISTICS

Distortion vs Frequency Distortion vs Frequency

–40

AV = 1

= ±5V

V

S

–50

–60

–70

–80

DISTORTION (dBc)

–90

–100

10k

V

OUT

= 2V

(P-P)

RL = 100Ω, 3RD

RL = 100Ω, 2ND

RL = 1k, 3RD

100k 1M 10M

FREQUENCY (Hz)

RL = 1k, 2ND

LT6202/03/04 G35

Distortion vs Frequency

–30

AV = 2

= ±2.5V

V

S

–40

–50

–60

–70

DISTORTION (dBc)

–80

–90

–100

V

10k

= 2V

OUT

(P-P)

RL = 100Ω, 2ND

RL = 1k, 2ND

100k 1M 10M

FREQUENCY (Hz)

RL = 100Ω, 3RD

RL = 1k, 3RD

LT6202/03/04 G36

5V Large-Signal Response 5V Small-Signal Response

5V

1V/DIV

0V

50mV/DIV

0V

= 5V, 0V

V

S

= 1

A

V

R

= 1k

L

200ns/DIV

±5V Large-Signal Response

5V

0V

2V/DIV

–5V

V

S

A

V

R

L

= ±5V
= 1
= 1k

200ns/DIV

LT6202/03/04 G38

LT6202/03/04 G40

= 5V, 0V

V

S

= 1

A

V

= 1k

R

L

Output-Overdrive Recovery

IN

0V

V

(1V/DIV)

0V

OUT

V

(2V/DIV)

= 5V, 0V

V

S

= 2

A

V

200ns/DIV

LT6202/03/04 G39

200ns/DIV

LT6202/03/04 G41

14

620234fa

LT6202/LT6203/LT6204

U

WUU

APPLICATIO S I FOR ATIO

Amplifier Characteristics

Figure 1 shows a simplified schematic of the LT6202/
LT6203/LT6204, which has two input differential amplifi­ers in parallel that are biased on simultaneously when the
common mode voltage is at least 1.5V from either rail. This
topology allows the input stage to swing from the positive
supply voltage to the negative supply voltage. As the
common mode voltage swings beyond V
source I1 saturates and current in Q1/Q4 is zero. Feedback
is maintained through the Q2/Q3 differential amplifier, but
with an input gm reduction of 1/2. A similar effect occurs
with I2 when the common mode voltage swings within

1.5V of the negative rail. The effect of the gm reduction is
a shift in the VOS as I1 or I2 saturate.

+V

–V

DESD1

+

–

DESD2

D2D1

DESD4DESD3

–V

+V

– 1.5V, current

CC

R1 R2

I

1

Q2 Q3

Q1 Q4

R3 R4 R5

I

2

Input bias current normally flows out of the + and – inputs.
The magnitude of this current increases when the input
common mode voltage is within 1.5V of the negative rail,
and only Q1/Q4 are active. The polarity of this current
reverses when the input common mode voltage is within

1.5V of the positive rail and only Q2/Q3 are active.
The second stage is a folded cascode and current mirror

that converts the input stage differential signals to a single
ended output. Capacitor C1 reduces the unity cross
frequency and improves the frequency stability without
degrading the gain bandwidth of the amplifier. The
differential drive generator supplies current to the output
transistors that swing from rail-to-rail.

+

Q11

Q10

V

+V

DESD5

DESD6

–V

–

V

6203/04 F01

+

V

BIAS

–

Q5

C1

Q8

D3

Q6

C

+V

Q9

M

DIFFERENTIAL

DRIVE

GENERATOR

Q7

Figure 1. Simplified Schematic

620234fa

15

LT6202/LT6203/LT6204

U

WUU

APPLICATIO S I FOR ATIO

Input Protection

There are back-to-back diodes, D1 and D2, across the
+ and – inputs of these amplifiers to limit the differential
input voltage to ±0.7V. The inputs of the LT6202/LT6203/
LT6304 do not have internal resistors in series with the
input transistors. This technique is often used to protect
the input devices from over voltage that causes excessive
currents to flow. The addition of these resistors would
significantly degrade the low noise voltage of these ampli­fiers. For instance, a 100Ω resistor in series with each
input would generate 1.8nV/√Hz of noise, and the total
amplifier noise voltage would rise from 1.9nV/√Hz to

2.6nV/√Hz. Once the input differential voltage exceeds
±0.7V, steady state current conducted though the protec­tion diodes should be limited to ±40mA. This implies 25Ω
of protection resistance per volt of continuous overdrive
beyond ±0.7V. The input diodes are rugged enough to
handle transient currents due to amplifier slew rate over­drive or momentary clipping without these resistors.

Figure 2 shows the input and output waveforms of the
amplifier driven into clipping while connected in a gain of
AV = 1. When the input signal goes sufficiently beyond the
power supply rails, the input transistors will saturate.
When saturation occurs, the amplifier loses a stage of
phase inversion and the output tries to change states.
Diodes D1 and D2 forward bias and hold the output within

a diode drop of the input signal. In this photo, the input
signal generator is clipping at ±35mA, and the output
transistors supply this generator current through the
protection diodes.

With the amplifier connected in a gain of AV ≥ 2, the output
can invert with very heavy input overdrive. To avoid this
inversion, limit the input overdrive to 0.5V beyond the
power supply rails.

ESD

The LT6202/LT6203/LT6204 have reverse-biased ESD
protection diodes on all inputs and outputs as shown in
Figure 1. If these pins are forced beyond either supply,
unlimited current will flow through these diodes. If the
current is transient and limited to one hundred milliamps
or less, no damage to the device will occur.

Noise

The noise voltage of the LT6202/LT6203/LT6204 is equiva­lent to that of a 225Ω resistor, and for the lowest possible
noise it is desirable to keep the source and feedback
resistance at or below this value, i.e. RS + R
With RS + R
is: en = √(1.9nV)2 + (1.9nV)2 = 2.7nV. Below this resistance
value, the amplifier dominates the noise, but in the resis­tance region between 225Ω and approximately 10kΩ, the
noise is dominated by the resistor thermal noise. As the
total resistance is further increased, beyond 10k, the noise
current multiplied by the total resistance eventually domi­nates the noise.

||

RFB = 225Ω the total noise of the amplifier

G

||

RFB ≤ 225Ω.

G

OV

Figure 2. VS = ±2.5V, AV = 1 with Large Overdrive

16

LT6202/03/04 F02

The product of en • √I
low noise amplifiers. Many low noise amplifiers with low
en have high I
low noise with the lowest possible supply current, this
product can prove to be enlightening. The LT6202/LT6203/
LT6204 have an en, √I
yet it is common to see amplifiers with similar noise
specifications have an en • √I

For a complete discussion of amplifier noise, see the
LT1028 data sheet.

SUPPLY

is an interesting way to gauge

SUPPLY

current. In applications that require

product of 3.2 per amplifier,

SUPPLY

SUPPLY

product of 4.7 to 13.5.

620234fa

U

TYPICAL APPLICATIO S

LT6202/LT6203/LT6204

Low Noise, Low Power 1MΩ AC
Photodiode Transimpedance Amplifier

Figure 3 shows the LT6202 applied as a transimpedance
amplifier (TIA). The LT6202 forces the BF862 ultralow­noise JFET source to 0V, with R3 ensuring that the JFET
has an I

of 1mA. The JFET acts as a source follower,

DRAIN

buffering the input of the LT6202 and making it suitable for
the high impedance feedback elements R1 and R2. The
BF862 has a minimum I

of 10mA and a pinchoff voltage

DSS

between –0.3V and –1.2V. The JFET gate and the LT6202

+

V

S

PHILIPS
BF862

–

V

BIAS

R3

4.99k

–

V

S

Figure 3. Low Noise, Low Power 1MΩ
AC Photodiode Transimpedance Amplifier

R1

499k

–

+

LT6202

VS = ±5V

R2

499k

C1

1pF

V

OUT

LT6202/03/04 F03

output therefore sit at a point slightly higher than one
pinchoff voltage below ground (typically about –0.6V).
When the photodiode is illuminated, the current must
come from the LT6202’s output through R1 and R2, as in
a normal TIA. Amplifier input noise density and gain­bandwidth product were measured at 2.4nV/Hz and
100MHz, respectively. Note that because the JFET has a
high gm, approximately 1/80Ω, its attenuation looking into
R3 is only about 2%. Gain-bandwidth product was mea­sured at 100MHz and the closed-loop bandwidth using a
3pF photodiode was approximately 1.4MHz.

Precision Low Noise, Low Power, 1MΩ
Photodiode Transimpedance Amplifier

Figure 4 shows the LT6202 applied as a transimpedance
amplifier (TIA), very similar to that shown in Figure 3. In
this case, however, the JFET is not allowed to dictate the
DC-bias conditions. Rather than being grounded, the
LT6202’s noninverting input is driven by the LTC2050 to
the exact state necessary for zero JFET gate voltage. The
noise performance is nearly identical to that of the circuit
in Figure 3, with the additional benefit of excellent DC
performance. Input offset was measured at under 200µV
and output noise was within 2mV

over a 20MHz

P-P

bandwidth.

+

V

S

PHILIPS

4.99k

BF862

R3

–

V

S

R4
10M

–

V

BIAS

0.1µF

–

LTC2050HV

+

C2

R5

10k

C3

1µF

R1

499k

–

+

LT6202

VS = ±5V

R2

499k

C1

1pF

LT6202/03/04 F04

V

OUT

Figure 4. Precision Low Noise, Low Power Transimpedance Amplifier

620234fa

17

LT6202/LT6203/LT6204

U

TYPICAL APPLICATIO S

Single-Supply 16-Bit ADC Driver

Figure 5 shows the LT6203 driving an LTC1864 unipolar
16-bit A/D converter. The bottom half of the LT6203 is in
a gain-of-one configuration and buffers the 0V negative
full-scale signal V

into the negative input of the

LOW

LTC1864. The top half of the LT6203 is in a gain-of-ten
configuration referenced to the buffered voltage V

LOW

and
drives the positive input of the LTC1864. The input range
of the LTC1864 is 0V to 5V, but for best results the input
range of VIN should be from V

(about 0.4V) to about

LOW

0.82V. Figure 6 shows an FFT obtained with a 10.1318kHz
coherent input waveform, from 8192 samples with no
windowing or averaging. Spurious free dynamic range is
seen to be about 100dB.

= 0.6V

V

IN

DC

±200mV

AC

V

= 0.4V

LOW

DC

+

1/2 LT6203

–

+

1/2 LT6203

R1

1k

R2

110Ω

–

R3

100Ω

R4

100Ω

Although the LTC1864 has a sample rate far below the gain
bandwidth of the LT6203, using this amplifier is not
necessarily a case of overkill. The designer is reminded
that A/D converters have sample apertures that are vanish­ingly small (ideally, infinitesimally small) and make de­mands on the upstream circuitry far in excess of what is
implied by the innocent-looking sample rate. In addition,
when an A/D converter takes a sample, it applies a small
capacitor to its inputs with a fair amount of glitch energy
and expects the voltage on the capacitor to settle to the
true value very quickly. Finally, the LTC1864 has a 20MHz
analog input bandwidth and can be used in undersampling
applications, again requiring a source bandwidth higher
than Nyquist.

5V

+

C1

470pF

LTC1864

16-BIT

250ksps

–

SERIAL
DATA
OUT

18

Figure 5. Single-Supply 16-Bit ADC Driver

0
–10
–20
–30
–40
–50
–60
–70
–80

SFDR (dB)

–90

–100
–110
–120
–130
–140
–150

0

37.5 62.5 100

12.5 25 50 75 82.5 112.5 125
FREQUENCY (kHz)

fS = 250ksps
f

= 10.131836kHz

IN

LT6202/03/04 F06

Figure 6. FFT Showing 100dB SFDR

LT6202/03/04 F05

620234fa

PACKAGE DESCRIPTIO

U

DD Package

8-Lead Plastic DFN (3mm × 3mm)

(Reference LTC DWG # 05-08-1698)

0.675 ±0.05

LT6202/LT6203/LT6204

R = 0.115

TYP

0.38 ± 0.10

85

3.5 ±0.05

1.65 ±0.05
(2 SIDES)2.15 ±0.05

PACKAGE
OUTLINE

0.28 ± 0.05

RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS

2.38 ±0.05

(2 SIDES)

0.50
BSC

16-Lead Plastic SSOP (Narrow .150 Inch)

.045 ±.005

.254 MIN

.150 – .165

PIN 1

TOP MARK

0.200 REF

NOTE:

1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)

2. ALL DIMENSIONS ARE IN MILLIMETERS

3. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE

4. EXPOSED PAD SHALL BE SOLDER PLATED

GN Package

(Reference LTC DWG # 05-08-1641)

3.00 ±0.10

(4 SIDES)

0.75 ±0.05

16

15

1.65 ± 0.10

(2 SIDES)

0.00 – 0.05

.189 – .196*

(4.801 – 4.978)

14

12 11 10

13

0.28 ± 0.05

2.38 ±0.10

(2 SIDES)

BOTTOM VIEW—EXPOSED PAD

.009

(0.229)

9

REF

14

0.50 BSC

(DD8) DFN 0203

.0250 TYP.0165 ±.0015

RECOMMENDED SOLDER PAD LAYOUT

.015

± .004

(0.38 ± 0.10)

.007 – .0098

(0.178 – 0.249)

.016 – .050

NOTE:

1. CONTROLLING DIMENSION: INCHES

2. DIMENSIONS ARE IN

3. DRAWING NOT TO SCALE
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH

SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD

FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

(0.406 – 1.270)

INCHES

(MILLIMETERS)

0° – 8° TYP

× 45°

.229 – .244

(5.817 – 6.198)

.053 – .068

(1.351 – 1.727)

.008 – .012

(0.203 – 0.305)

12

.150 – .157**
(3.810 – 3.988)

5

4

3

678

.0250

(0.635)

BSC

.004 – .0098

(0.102 – 0.249)

GN16 (SSOP) 0502

620234fa

19

LT6202/LT6203/LT6204

U

PACKAGE DESCRIPTIO

MS8 Package

8-Lead Plastic MSOP

(Reference LTC DWG # 05-08-1660)

0.889

± 0.127

(.035 ± .005)

5.23

(.206)

MIN

0.42 ± 0.04

(.0165 ± .0015)

TYP

RECOMMENDED SOLDER PAD LAYOUT

0.254
(.010)

GAUGE PLANE

0.18

(.077)

NOTE:

1. DIMENSIONS IN MILLIMETER/(INCH)

2. DRAWING NOT TO SCALE

3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE

4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE

5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX

DETAIL “A”

(.126 – .136)

(.0256)

° – 6° TYP

0

DETAIL “A”

3.2 – 3.45

0.65

BSC

0.53 ± 0.015

(.021 ± .006)

SEATING

PLANE

3.00 ± 0.102

(.118 ± .004)

(NOTE 3)

4.90

± 0.15

(1.93 ± .006)

(.043)

0.22 – 0.38

(.009 – .015)

TYP

1.10

MAX

8

12

0.65

(.0256)

BSC

7

0.52

5

4

(.206)

REF

3.00 ± 0.102
(.118 ± .004)

NOTE 4

0.86

(.034)

REF

0.13 ± 0.076
(.005 ± .003)

MSOP (MS8) 0802

6

3

20

620234fa

PACKAGE DESCRIPTIO

.050 BSC

LT6202/LT6203/LT6204

U

S8 Package

8-Lead Plastic Small Outline (Narrow .150 Inch)

(Reference LTC DWG # 05-08-1610)

.189 – .197

.045 ±.005

(4.801 – 5.004)

8

NOTE 3

7

6

5

.245
MIN

.030 ±.005

TYP

RECOMMENDED SOLDER PAD LAYOUT

.010 – .020

(0.254 – 0.508)

.008 – .010

(0.203 – 0.254)

NOTE:

1. DIMENSIONS IN

2. DRAWING NOT TO SCALE

3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)

× 45°

.016 – .050

(0.406 – 1.270)

INCHES

(MILLIMETERS)

.160

±.005

.228 – .244

(5.791 – 6.197)

0°– 8° TYP

.053 – .069

(1.346 – 1.752)

.014 – .019

(0.355 – 0.483)

TYP

.150 – .157

(3.810 – 3.988)

NOTE 3

1

3

2

4

.004 – .010

(0.101 – 0.254)

.050

(1.270)

BSC

SO8 0303

620234fa

21

LT6202/LT6203/LT6204

U

PACKAGE DESCRIPTIO

14-Lead Plastic Small Outline (Narrow .150 Inch)

S Package

(Reference LTC DWG # 05-08-1610)

.050 BSC

N

.245
MIN

123 N/2

.030 ±.005

TYP

RECOMMENDED SOLDER PAD LAYOUT

.010 – .020

(0.254 – 0.508)

.008 – .010

(0.203 – 0.254)

NOTE:

1. DIMENSIONS IN

2. DRAWING NOT TO SCALE

3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)

×

°

45

.016 – .050

(0.406 – 1.270)

INCHES

(MILLIMETERS)

.045 ±.005

.160 ±.005

.228 – .244

(5.791 – 6.197)

0° – 8° TYP

.053 – .069

(1.346 – 1.752)

.014 – .019

(0.355 – 0.483)

TYP

.337 – .344

(8.560 – 8.738)

NOTE 3

13

12

11

4

.050

(1.270)

BSC

10

5

14

N

1

3

2

8

9

.150 – .157

(3.810 – 3.988)

N/2

7

6

NOTE 3

.004 – .010

(0.101 – 0.254)

S14 0502

22

620234fa

PACKAGE DESCRIPTIO

LT6202/LT6203/LT6204

U

S5 Package

5-Lead Plastic TSOT-23

(Reference LTC DWG # 05-08-1635)

0.62
MAX

3.85 MAX

0.20 BSC

DATUM ‘A’

NOTE:

1. DIMENSIONS ARE IN MILLIMETERS

2. DRAWING NOT TO SCALE

3. DIMENSIONS ARE INCLUSIVE OF PLATING

4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR

5. MOLD FLASH SHALL NOT EXCEED 0.254mm

6. JEDEC PACKAGE REFERENCE IS MO-193

2.62 REF

RECOMMENDED SOLDER PAD LAYOUT

PER IPC CALCULATOR

0.30 – 0.50 REF

0.95
REF

1.22 REF

1.4 MIN

0.09 – 0.20
(NOTE 3)

2.80 BSC

1.50 – 1.75
(NOTE 4)

1.00 MAX

PIN ONE

0.95 BSC

0.80 – 0.90

2.90 BSC
(NOTE 4)

0.30 – 0.45 TYP
5 PLCS (NOTE 3)

0.01 – 0.10

1.90 BSC

S5 TSOT-23 0302

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.

620234fa

23

LT6202/LT6203/LT6204

U

TYPICAL APPLICATIO

Low Noise Differential Amplifier with Gain Adjust and Common Mode Control

R1

0dB

–

V

6dB

IN

12dB

0dB

+

6dB

V

IN

12dB

402Ω

R2

200Ω

R3

100Ω

R4

402Ω

R5

200Ω

R6

100Ω

–

1/2 LT6203

+

C1

270pF

C2

R7, 402Ω

+

V

R8

402Ω

V

22pF

R9

402Ω

R

A

+

R

0.1µF

B

Low Noise Differential Amplifier

Frequency Response

C3

5pF

R10, 402Ω

–

1/2 LT6203

+

+

V

OUT

–

V

OUT

R

B

OUTPUT VCM =V

()

RA + R

+

B

LT6202/03/04 F07

G = 0dB

RELATIVE DIFFERENTIAL GAIN (1dB/DIV)

50k

FREQUENCY (Hz)

G = 6dB

G = 12dB

1M

LT6202/03/04 F08

5M

RELATED PARTS

PART NUMBER DESCRIPTION COMMENTS

LT1028 Single, Ultralow Noise 50MHz Op Amp 1.1nV/√Hz
LT1677 Single, Low Noise Rail-to-Rail Amplifier 3V Operation, 2.5mA, 4.5nV/√Hz, 60µV Max V
LT1722/LT1723/LT1724 Single/Dual/Quad Low Noise Precision Op Amps 70V/µs Slew Rate, 400µV Max VOS, 3.8nV/√Hz, 3.7mA
LT1800/LT1801/LT1802 Single/Dual/Quad Low Power 80MHz Rail-to-Rail Op Amps 8.5nV/√Hz, 2mA Max Supply
LT1806/LT1807 Single/Dual, Low Noise 325MHz Rail-to-Rail Amplifiers 2.5V Operation, 550µV Max VOS, 3.5nV/√Hz
LT6200 Single Ultralow Noise Rail-to-Rail Amplifier 0.95nV/√Hz, 165MHz Gain Bandwidth

LT/TP 0403 1K • PRINTED IN USA

24

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

[phone] ● FAX: [phone]

●

www.linear.com

 LINEAR TECHNOLOGY CORPORA TION 2002

0S

620234fa