LTC6911-1/LTC6911-2

9

sn691112 691112fs

to midsupply point, unless otherwise noted.

ELECTRICAL CHARACTERISTICS

Note 1: Absolute Maximum Ratings are those values beyond which the life

of the device may be impaired.

Note 2: The LTC6911C and LTC6911I are guaranteed functional over the

operating temperature range of – 40

°C to 85°C. The LTC6911H is

guaranteed functional over the operating temperature range of – 40

°C to

125

°C.

Note 3: The LTC6911C is guaranteed to meet specified performance from

0

°C to 70°C. The LTC6911C is designed, characterized and expected to

meet specified performance from – 40

°C to 85°C but is not tested or QA

sampled at these temperatures. LTC6911I is guaranteed to meet specified

performance from – 40

°C to 85°C. The LTC6911H is guaranteed to meet

specified performance from –40

°C to 125°C.

Note 4: Output voltage swings are measured as differences between the

output and the respective supply rail.

Note 5: Extended operation with output shorted may cause junction

temperature to exceed the 150

°C limit and is not recommended.

Note 6: Gain is measured with a DC large-signal test using an output

excursion between approximately 30% and 70% of the total supply

voltage.

Note 7: Channel-to-channel isolation is measured by applying a 200kHz

the output voltage RMS of the other channel relative to AGND with its

input tied to AGND. Isolation is calculated:

Isolation

V

V

Isolation

V

V

A

OUTB

OUTA

B

OUTA

OUTB

==

20

20

10

10

• log

,

• log

Note 8: Offset voltage referred to the INA or INB input is (1 + 1/G) times

the offset voltage of the internal op amp, where G is the nominal gain

magnitude. See Applications Information.

Note 9: Input resistance can vary by approximately

±30% part-to-part at a

given gain setting (input resistance match remains as specified).

C/I GRADES

H GRADE

PARAMETER

CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

LTC6911-2 Only

DC Input Resistance Match

Gain = 1

q

10

10

Ω

Gain = 2

q

55

Ω

Gain = 4

q

22

Ω

Gain > 4

q

11

Ω

DC Small-Signal Output Resistance

at OUTA or OUTB Pins

Gain = 0

0.4

0.4

Ω

Gain = 1

0.7

0.7

Ω

Gain = 2

1.0

1.0

Ω

Gain = 4

1.9

1.9

Ω

Gain = 8

3.4

3.4

Ω

Gain = 16

6.4

6.4

Ω

Gain = 32

15

15

Ω

Gain = 64

30

30

Ω

Wideband Noise (Referred to Input)

f = 1kHz to 200kHz

Gain = 0 (Output Noise Only)

7.4

7.4

Gain = 1

12.4

12.4

Gain = 2

8.5

8.5

Gain = 4

6.5

6.5

Gain = 8

5.5

5.5

Gain = 16

5.2

5.2

Gain = 32

4.9

4.9

Gain = 64

4.3

4.3

Voltage Noise Density

f = 50kHz

(Referred to Input)

Gain = 1

28.0

28.0

nV/

√Hz

Gain = 2

19.0

19.0

nV/

√Hz

Gain = 4

14.8

14.8

nV/

√Hz

Gain = 8

12.7

12.7

nV/

√Hz

Gain = 16

11.8

11.8

nV/

√Hz

Gain = 32

11.5

11.5

nV/

√Hz

Gain = 64

10.9

10.9

nV/

√Hz

Total Harmonic Distortion

–90

– 90

dB

0.003

0.003

%

–82

– 82

dB

0.008

0.008

%

Gain-Bandwidth Product

q

6

11

17

6

11

17

MHz