LINEAR TECHNOLOGY LTC6244 Technical data

FEATURES

z

LTC6244

Dual 50MHz, Low Noise,

Rail-to-Rail, CMOS Op Amp

U

DESCRIPTIO

■

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

2.8V to ±5.25V LTC6244HV

■

Low Input Capacitance: 2.1pF

■

Available in 8-Pin MSOP and Tiny DFN Packages

U

APPLICATIO S

■

Photodiode Amplifi ers

■

Charge Coupled Amplifi ers

■

Low Noise Signal Processing

■

Active Filters

■

Medical Instrumentation

■

High Impedance Transducer Amplifi er

The LTC®6244 is a dual high speed, unity-gain stable CMOS
op amp that features a 50MHz gain bandwidth, 40V/µs slew
rate, 1pA of input bias current, low input capacitance and
rail-to-rail output swing. The 0.1Hz to 10Hz noise is just

1.5µV

and 1kHz noise is guaranteed to be less than

P-P

12nV/√Hz. This excellent AC and noise performance is
combined with wide supply range operation, a maximum
offset voltage of just 100µV and drift of only 2.5µV/°C,
making it suitable for use in many fast signal processing
applications, such as photodiode amplifi ers.

This op amp has an output stage that swings within 35mV
of either supply rail to maximize the signal dynamic range
in low supply applications. The input common mode
range extends to the negative supply. It is fully specifi ed
on 3V and 5V, and an HV version guarantees operation
on supplies of ±5V.

The LTC6244 is available in the 8-pin MSOP, and for com­pact designs, it is packaged in the tiny dual fi ne pitch lead
free (DFN) package.

TYPICAL APPLICATIO

Very Low Noise Large Area Photodiode

0.25pF

5V

PHILIPS

BF862

JFET

4.99k

–5V

I

4.7µF*

4.99k

V

BB

HAMAMATSU LARGE AREA

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

PD

PHOTODIODE

S1227-1010BQ

= 3000pF

C

PD

5V

–

1/2

LTC6244HV

+

–5V

6244 TA01a

U

1M

V

OUT

BW = 350kHz
NOISE = 291nV AT 10kH

= 1M • I

V

OUT

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.

VOS Distribution

120

LTC6244MS8

110

= 5V, 0V

V

S

100

= 2.5V

V

CM

= 25°C

T

A

90

PD

80

70

60

50

40

NUMBER OF UNITS

30

20

10

0

–60 –40

INPUT OFFSET VOLTAGE (µV)

–20

0

20 40

60

6244 G01

6244f

1

LTC6244

WW

W

ABSOLUTE AXI U RATI GS

U

(Note 1)

Total Supply Voltage (V+ to V–)

LTC6244 .................................................................7V

LTC6244HV ...........................................................12V

+

Input Voltage .......................... (V

+ 0.3V) to (V– – 0.3V)

Input Current ........................................................±10mA

Output Short Circuit Duration (Note 2) ............ Indefi nite

Operating Temperature Range

LTC6244C ............................................–40°C to 85°C

LTC6244I ............................................. –40°C to 85°C

LTC6244H .......................................... –40°C to 125°C

UUW

PACKAGE/ORDER I FOR ATIO

TOP VIEW

+

9

1OUT A

–IN A

2

+IN A

V

8-LEAD (3mm ´ 3mm) PLASTIC DFN

EXPOSED PAD (PIN 9) CONNECTED TO V

A

3

–

4

DD PACKAGE

T

= 125°C, θJA = 43°C/W

JMAX

(PCB CONNECTION OPTIONAL)

8

V

OUT B

7

–IN B

6

B

+IN B

5

–

Specifi ed Temperature Range (Note 3)

LTC6244C ................................................0°C to 70°C

LTC6244I ............................................. –40°C to 85°C

LTC6244H .......................................... –40°C to 125°C

Junction Temperature ........................................... 150°C

DD Package ...................................................... 125°C

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

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

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

TOP VIEW

OUT A

1

–IN A

2

+IN A

3

–

V

4

MS8 PACKAGE

8-LEAD PLASTIC MSOP

T

= 150°C, θJA = 250°C/W

JMAX

8
7
6
5

+

V
OUT B
–IN B
+IN B

ORDER PART NUMBER DD PART MARKING* ORDER PART NUMBER MS8 PART MARKING*

LTC6244CDD
LTC6244HVCDD
LTC6244IDD
LTC6244HVIDD

Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/

Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifed by a label on the shipping container.

LCCF
LCGD
LCCF
LCGD

LTC6244CMS8
LTC6244HVCMS8
LTC6244IMS8
LTC6244HVIMS8
LTC6244HMS8

LTCCM
LTCGF
LTCCM
LTCGF
LTCCM

6244f

2

LTC6244

U

AVAILABLE OPTIO S

PART NUMBER SPECIFIED TEMP RANGE SPECIFIED SUPPLY VOLTAGE PACKAGE PART MARKING

LTC6244CMS8 0°C to 70°C 3V, 5V MS8 LTCCM
LTC6244CDD 0°C to 70°C 3V, 5V DD LCCF
LTC6244HVCMS8 0°C to 70°C 3V, 5V, ±5V MS8 LTCGF
LTC6244HVCDD 0°C to 70°C 3V, 5V, ±5V DD LCGD
LTC6244IMS8 –40°C to 85°C 3V, 5V MS8 LTCCM
LTC6244IDD –40°C to 85°C 3V, 5V DD LCCF
LTC6244HVIMS8 –40°C to 85°C 3V, 5V, ±5V MS8 LTCGF
LTC6244HVIDD –40°C to 85°C 3V, 5V, ±5V DD LCGD
LTC6244HMS8 –40°C to 125°C 3V, 5V MS8 LTCCM

(LTC6244C/I, LTC6244HVC/I) The ● denotes the specifi cations which apply

ELECTRICAL CHARACTERISTICS

over the specifi ed temperature range, otherwise specifi cations are at T

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

TC V

OS

I

B

I

OS

e

n

i

n

R

IN

C

IN

V

CM

CMRR Common Mode Rejection 0V ≤ V

Input Offset Voltage (Note 4) MS8 Package

V

Match Channel-to-Channel (Note 5) MS8 Package

OS

Input Offset Voltage Drift, MS8 (Note 6)
Input Bias Current (Notes 4, 7)

Input Offset Current (Notes 4, 7)

Input Noise Voltage 0.1Hz to 10Hz 1.5 µV
Input Noise Voltage Density f = 1kHz 8 12 nV/√Hz
Input Noise Current Density (Note 8) 0.56 fA/√Hz
Input Resistance Common Mode 10
Input Capacitance

Differential Mode
Common Mode

Input Voltage Range Guaranteed by CMRR

CMRR Match
Channel-to-Channel (Note 5)

0°C to 70°C
–40°C to 85°C

DD Package
0°C to 70°C
–40°C to 85°C

0°C to 70°C
–40°C to 85°C

DD Package
0°C to 70°C
–40°C to 85°C

f = 100kHz

≤ 3.5V

CM

= 25°C. VS = 5V, 0V, VCM = 2.5V unless otherwise noted.

A

●

●

●

●

●

●

●

●

●

●

●

●

0 3.5 V

●

74 105 dB

●

72 100 dB

40 100

225
300

100 650

800
950

40 160

275
325

150 800

900

1.1

0.7 2.5 µV/°C
1

75

0.5

75

12

3.5

2.1

mV

µV
µV
µV

µV
µV
µV

µV
µV
µV

µV
µV

pA
pA

pA
pA

P-P

Ω

pF
pF

6244f

3

LTC6244

(LTC6244C/I, LTC6244HVC/I) The ● denotes the specifi cations which apply

ELECTRICAL CHARACTERISTICS

over the specifi ed temperature range, otherwise specifi cations are at T

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

A

VOL

V

OL

V

OH

PSRR Power Supply Rejection VS = 2.8V to 6V, VCM = 0.2V

I

SC

I

S

GBW Gain Bandwidth Product Frequency = 20kHz, R
SR Slew Rate (Note 11) A
FPBW Full Power Bandwidth (Note 12) V
t

s

Large Signal Voltage Gain VO = 1V to 4V

R

= 10k to VS/2

L

0°C to 70°C
–40°C to 85°C

V

= 1.5V to 3.5V

O

R

= 1k to VS/2

L

0°C to 70°C
–40°C to 85°C

Output Voltage Swing Low (Note 9) No Load

I

= 1mA

SINK

I

= 5mA

SINK

Output Voltage Swing High (Note 9) No Load

I

= 1mA

SOURCE

I

= 5mA

SOURCE

PSRR Match
Channel-to-Channel (Note 5)

Minimum Supply Voltage (Note 10)
Short-Circuit Current
Supply Current per Amplifi er

= –2, RL = 1kΩ

V

= 3V

OUT

Settling Time V

= 2V, AV = –1, RL = 1kΩ, 0.1% 535 ns

STEP

= 25°C. VS = 5V, 0V, VCM = 2.5V unless otherwise noted.

A

, RL = 1kΩ

P-P

= 1kΩ

L

1000

●

600

●

450

300

●

200

●

150

●

●

●

●

●

●

●

75 105 dB

●

73 100 dB

●

2.8 V

●

25 35 mA

●

●

35 50 MHz

●

18 35 V/µs

●

1.9 3.7 MHz

2500 V/mV

1000 V/mV

15
40

150

15
45

175

6.25 7.4 mA

35
75

300

35
75

325

V/mV
V/mV

V/mV
V/mV

mV
mV
mV

mV
mV
mV

(LTC6244C/I, LTC6244HVC/I) The ● denotes the specifi cations which apply over the specifi ed temperature range, otherwise
specifi cations are at T

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

I

B

I

OS

e

n

i

n

V

CM

= 25°C. VS = 3V, 0V, VCM = 1.5V unless otherwise noted.

A

Input Offset Voltage (Note 4) MS8 Package

0°C to 70°C
–40°C to 85°C

DD Package
0°C to 70°C
–40°C to 85°C

V

Match Channel-to-Channel (Note 5) MS8 Package

OS

0°C to 70°C
–40°C to 85°C

DD Package
0°C to 70°C
–40°C to 85°C

Input Bias Current (Notes 4, 7)

Input Offset Current (Notes 4, 7)

●

●

●

●

●

●

●

●

●

●

40 175

250
325

100 650

800
950

40 200

300
350

150 800

900

1.1

1

75

0.5

75

Input Noise Voltage 0.1Hz to 10Hz 1.5 µV

µV
µV
µV

µV
µV
µV

µV
µV
µV

µV
µV

mV

pA
pA

pA
pA

P-P

Input Noise Voltage Density f = 1kHz 8 12 nV/√Hz
Input Noise Current Density (Note 8) 0.56 fA/√Hz
Input Voltage Range Guaranteed by CMRR

●

0 1.5 V

6244f

4

LTC6244

(LTC6244C/I, LTC6244HVC/I) The ● denotes the specifi cations which apply

ELECTRICAL CHARACTERISTICS

over the specifi ed temperature range, otherwise specifi cations are at T

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

CMRR Common Mode Rejection 0V ≤ V

CMRR Match
Channel-to-Channel (Note 5)

A

V

V

VOL

OL

OH

Large Signal Voltage Gain VO = 1V to 2V

Output Voltage Swing Low (Note 9) No Load

Output Voltage Swing High (Note 9) No Load

PSRR Power Supply Rejection V

PSRR Match
Channel-to-Channel (Note 5)

Minimum Supply Voltage (Note 10)

I

SC

I

S

Short-Circuit Current
Supply Current per Amplifi er

GBW Gain Bandwidth Product Frequency = 20kHz, R

CM

R

= 10k to VS/2

L

0°C to 70°C
–40°C to 85°C

I

= 1mA

SINK

I

= 1mA

SOURCE

= 2.8V to 6V, VCM = 0.2V

S

= 25°C. VS = 3V, 0V, VCM = 1.5V unless otherwise noted.

A

≤ 1.5V

= 1kΩ

L

●

70 105 dB

●

68 100 dB

200

●

100

●

85

●

●

●

●

●

75 105 dB

●

73 100 dB

●

2.8 V

●

815 mA

●

●

35 50 MHz

800 V/mV

12
45

12
50

4.8 5.8 mA

30

110

30

110

V/mV
V/mV

mV
mV

mV
mV

(LTC6244HVC/I) The ● denotes the specifi cations which apply over the specifi ed temperature range, otherwise specifi cations are at

= 25°C. VS = ±5V, 0V, VCM = 0V unless otherwise noted.

T

A

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

TC V
I

B

I

OS

e

n

i

n

R

IN

C

IN

OS

Input Offset Voltage (Note 4) MS8 Package

0°C to 70°C
–40°C to 85°C

●

●

DD Package
0°C to 70°C
–40°C to 85°C

V

Match Channel-to-Channel (Note 5) MS8 Package

OS

0°C to 70°C
–40°C to 85°C

●

●

●

●

DD Package
0°C to 70°C
–40°C to 85°C

Input Offset Voltage Drift, MS8 (Note 6)

●

●

●

Input Bias Current (Notes 4, 7)

●

Input Offset Current (Notes 4, 7)

●

Input Noise Voltage 0.1Hz to 10Hz 1.5 µV
Input Noise Voltage Density f = 1kHz 8 12 nV/√Hz
Input Noise Current Density (Note 8) 0.56 fA/√Hz
Input Resistance Common Mode 10
Input Capacitance

f = 100kHz
Differential Mode
Common Mode

50 220

275
375

100 700

800

1050

50 250

325
400

150 900

1000
1100

µV
µV
µV

µV
µV
µV

µV
µV
µV

µV
µV
µV

0.7 2.5 µV/°C
1

75

0.5

75

12

3.5

2.1

pA
pA

pA
pA

P-P

pF
pF

Ω

6244f

5

LTC6244

ELECTRICAL CHARACTERISTICS

(LTC6244HVC/I) The
specifi ed temperature range, otherwise specifi cations are at T

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

CM

CMRR Common Mode Rejection –5V ≤ V

A

VOL

V

OL

V

OH

PSRR Power Supply Rejection V

I

SC

I

S

GBW Gain Bandwidth Product Frequency = 20kHz, R
SR Slew Rate (Note 11) A
FPBW Full Power Bandwidth (Note 12) V
t

s

Input Voltage Range Guaranteed by CMRR

CMRR Match
Channel-to-Channel (Note 5)

Large Signal Voltage Gain VO = –3.5V to 3.5V

Output Voltage Swing Low (Note 9) No Load

Output Voltage Swing High (Note 9) No Load

PSRR Match
Channel-to-Channel (Note 5)

Minimum Supply Voltage (Note 10)
Short-Circuit Current
Supply Current per Amplifi er

Settling Time V

= 25°C. VS = ±5V, 0V, VCM = 0V unless otherwise noted.

A

≤ 3.5V

CM

R

= 10k

L

0°C to 70°C
–40°C to 85°C

R

= 1k

L

0°C to 70°C
–40°C to 85°C

I

= 1mA

SINK

I

= 10mA

SINK

I

= 1mA

SOURCE

I

= 10mA

SOURCE

= 2.8V to 10.5V, VCM = 0.2V

S

= –2, RL = 1kΩ

V

= 3V

OUT

STEP

, RL = 1kΩ

P-P

= 2V, AV = –1, RL = 1kΩ, 0.1% 330 ns

●

denotes the specifi cations which apply over the

●

–5 3.5 V

●

80 105 dB

78 95 dB

●

= 1kΩ

L

2500

●

1500

●

1200

700

●

400

●

300

●

●

●

●

●

●

●

75 110 dB

●

73 106 dB

●

2.8 V

●

40 55 mA

●

●

35 50 MHz

●

18 40 V/µs

●

1.9 4.25 MHz

6000 V/mV

3500 V/mV

15
45

360

15
45

360

78.8 mA

40
75

550

40
75

550

V/mV
V/mV

V/mV
V/mV

mV
mV
mV

mV
mV
mV

●

(LTC6244H) The

= 2.5V unless otherwise noted.

V

CM

denotes the specifi cations which apply from –40°C to 125°C, otherwise specifi cations are at TA = 25°C. VS = 5V, 0V,

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

TC V
I

B

I

OS

V

CM

OS

Input Offset Voltage (Note 4) MS8 Package

V

Match Channel-to-Channel (Note 5) MS8 Package

OS

Input Offset Voltage Drift, MS8 (Note 6)
Input Bias Current (Notes 4, 7)

Input Offset Current (Notes 4, 7)

Input Voltage Range Guaranteed by CMRR

CMRR Common Mode Rejection 0V ≤ V

CM

≤ 3.5V

●

●

●

●

●

●

0 3.5 V

●

74 dB

40 125

400

40 160

400

µV
µV

µV
µV

0.7 2.5 µV/°C
1

2

0.5

250

pA
nA

pA
pA

CMRR Match
Channel-to-Channel (Note 5)

●

72 dB

6244f

6

LTC6244

ELECTRICAL CHARACTERISTICS

(LTC6244H) The
125°C, otherwise specifi cations are at T

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

A

VOL

V

OL

V

OH

PSRR Power Supply Rejection VS = 2.8V to 6V, VCM = 0.2V

I

SC

I

S

GBW Gain Bandwidth Product Frequency = 20kHz, R
SR Slew Rate (Note 11) A
FPBW Full Power Bandwidth (Note 12) V

Large Signal Voltage Gain VO = 1V to 4V

Output Voltage Swing Low (Note 9) No Load

Output Voltage Swing High (Note 9) No Load

PSRR Match
Channel-to-Channel (Note 5)

Minimum Supply Voltage (Note 10)
Short-Circuit Current
Supply Current per Amplifi er

= 25°C. VS = 5V, 0V, VCM = 2.5V unless otherwise noted.

A

R

= 10k to VS/2

L

= 1.5V to 3.5V

V

O

R

= 1k to VS/2

L

I

= 1mA

SINK

I

= 5mA

SINK

I

= 1mA

SOURCE

I

= 5mA

SOURCE

= –2, RL = 1kΩ

V

= 3V

OUT

, RL = 1kΩ

P-P

●

denotes the specifi cations which apply from –40°C to

●

350 V/mV

●

125 V/mV

= 1kΩ

L

●

●

●

●

●

●

●

75 dB

●

73 dB

●

2.8 V

●

20 mA

●

●

30 MHz

●

17 V/µs

●

1.8 MHz

6.25 7.4 mA

40
85

325

40
85

325

mV
mV
mV

mV
mV
mV

(LTC6244H) The ● denotes the specifi cations which apply from –40°C to 125°C, otherwise specifi cations are at TA = 25°C. VS = 3V, 0V,

= 1.5V unless otherwise noted.

V

CM

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

I

B

I

OS

V

CM

Input Offset Voltage (Note 4) MS8 Package

Match Channel-to-Channel (Note 5) MS8 Package

V

OS

Input Bias Current (Notes 4, 7)

Input Offset Current (Notes 4, 7)

Input Voltage Range Guaranteed by CMRR

CMRR Common Mode Rejection 0V ≤ V

CMRR Match
Channel-to-Channel (Note 5)

A

VOL

V

OL

V

OH

PSRR Power Supply Rejection V

Large Signal Voltage Gain VO = 1V to 2V

= 10k to VS/2

R

L

Output Voltage Swing Low (Note 9) No Load

I

SINK

Output Voltage Swing High (Note 9) No Load

I

SOURCE

= 2.8V to 6V, VCM = 0.2V

S

≤ 1.5V

CM

= 1mA

= 1mA

●

●

●

●

●

0 1.5 V

●

70 dB

●

68 dB

●

75 V/mV

●

●

●

●

●

75 dB

40 175

400

40 200

420

1

0.5

250

30

110

30

110

µV
µV

µV
µV

pA

2

nA
pA

pA

mV
mV

mV
mV

6244f

7

LTC6244

ELECTRICAL CHARACTERISTICS

(LTC6244H) The
125°C, otherwise specifi cations are at T

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

PSRR Match Channel-to-Channel
(Note 5)

Minimum Supply Voltage (Note 10)

I

SC

I

S

GBW Gain Bandwidth Product Frequency = 20kHz, R

Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.

Note 2: A heat sink may be required to keep the junction temperature
below the absolute maximum rating when the output is shorted
indefi nitely.

Note 3: The LTC6244C/LTC6244HVC are guaranteed to meet specifi ed
performance from 0°C to 70°C. They are designed, characterized and
expected to meet specifi ed performance from –40°C to 85°C, but are not
tested or QA sampled at these temperatures. The LTC6244I/LTC6244HVI,
are guaranteed to meet specifi ed performance from –40°C to 85°C. The
LTC6244H is guaranteed to meet specifi ed performance from –40°C to
125°C.

Note 4: ESD (Electrostatic Discharge) sensitive device. ESD protection
devices are used extensively internal to the LTC6244; however, high
electrostatic discharge can damage or degrade the device. Use proper ESD
handling precautions.

Note 5: Matching parameters are the difference between the two amplifi ers
of the LTC6244. CMRR and PSRR match are defi ned as follows: CMRR
and PSRR are measured in µV/V on the amplifi ers. The difference is
calculated between the sides in µV/V. The result is converted to dB.

Short-Circuit Current
Supply Current per Amplifi er

= 25°C. VS = 3V, 0V, VCM = 1.5V unless otherwise noted.

A

●

denotes the specifi cations which apply from –40°C to

●

73 dB

●

2.8 V

●

5mA

●

= 1kΩ

L

Note 6: This parameter is not 100% tested.
Note 7: This specifi cation is limited by high speed automated test

capability. See Typical Characteristics curves for actual typical
performance.

Note 8: Current noise is calculated from the formula: i
where q = 1.6 × 10
50GΩ dominates the contribution of current noise. See also Typical
Characteristics curve Noise Current vs Frequency.

Note 9: Output voltage swings are measured between the output and
power supply rails.

Note 10: Minimum supply voltage is guaranteed by the power supply
rejection ratio test.

Note 11: Slew rate is measured in a gain of –2 with R
500Ω. V

IN

+1V. On the LTC6244HV/LTC6245HV, V
measured between –2V and +2V.

Note 12: Full-power bandwidth is calculated from the slew rate:
FPBW = SR/2πV

–19

is ±1V and V

.

P

●

28 MHz

coulomb. The noise of source resistors up to

slew rate is measured between –1V and

OUT

4.8 5.8 mA

= (2qIB)

n

= 1k and RG =

F

is ±2V and V

IN

OUT

1/2

slew rate is

8

6244f