LTC6605-7

4

66057f

AC ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. V+ = 3V, V– = 0V, VINCM = VOCM = mid-supply, VBIAS = V+, unless

otherwise noted. Filter configured as in Figure 2, unless otherwise noted. VS is defined as (V+ – V–). VOUTCM is defined as (V+OUT +

V–OUT)/2. VINCM is defined as (V+IN + V–IN)/2. VOUTDIFF is defined as (V+OUT – V–OUT). VINDIFF is defined as (V+IN + V–IN).

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: All pins are protected by steering diodes to either supply. If any

pin is driven beyond the LTC6605-7’s supply voltage, the excess input

current (current in excess of what it takes to drive that pin to the supply

rail) should be limited to less than 10mA.

Note 3: A heat sink may be required to keep the junction temperature

below the Absolute Maximum Rating when the output is shorted

indefinitely. Long-term application of output currents in excess of the

Absolute Maximum Ratings may impair the life of the device.

Note 4: Both the LTC6605C and the LTC6605I are guaranteed functional

over the operating temperature range –40°C to 85°C.

Note 5: The LTC6605C is guaranteed to meet specified performance

from 0°C to 70°C. The LTC6605C 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. The LTC6605I is

guaranteed to meet specified performance from –40°C to 85°C.

Note 6: Output referred voltage offset is a function of gain. To determine

output referred voltage offset, or output voltage offset drift, multiply VOS

by the noise gain (1 + GAIN). See Figure 3.

Note 7: Input bias current is defined as the average of the currents

flowing into the noninverting and inverting inputs of the internal amplifier

and is calculated from measurements made at the pins of the IC. Input

offset current is defined as the difference of the currents flowing into

the noninverting and inverting inputs of the internal amplifier and is

calculated from measurements made at the pins of the IC.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Gain

Filter Gain

ΔVIN = ±0.125V, DC

VINDIFF = 0.5VP-P, f = 3.5MHz

VINDIFF = 0.5VP-P, f = 5.25MHz

VINDIFF = 0.5VP-P, f = 7MHz

VINDIFF = 0.5VP-P, f = 14MHz

VINDIFF = 0.5VP-P, f = 35MHz

l

l

l

l

l

l

–0.25

–1.2

–2.55

–4.25

–11.95

–28

±0.05

–0.84

–2.08

–3.71

–11.3

–25.9

0.25

–0.5

–1.65

–3.2

–10.7

–25

dB

dB

dB

dB

dB

dB

Phase

Filter Phase

ΔVIN = ±0.125V, DC

VINDIFF = 0.5VP-P, f = 3.5MHz

VINDIFF = 0.5VP-P, f = 5.25MHz

VINDIFF = 0.5VP-P, f = 7MHz

0

–43.4

–63.8

–81.9

Deg

Deg

Deg

Deg

ΔGain

Gain Match (Channel-to-Channel)

ΔVIN = ±0.125V, DC

VINDIFF = 0.5VP-P, f = 3.5MHz

VINDIFF = 0.5VP-P, f = 5.25MHz

VINDIFF = 0.5VP-P, f = 7MHz

l

l

l

l

–0.2

–0.2

–0.3

–0.35

±0.05

±0.05

±0.05

±0.05

0.2

0.2

0.3

0.35

dB

dB

dB

dB

ΔPhase

Phase Match (Channel-to-Channel)

VINDIFF = 0.5VP-P, f = 3.5MHz

VINDIFF = 0.5VP-P, f = 5.25MHz

VINDIFF = 0.5VP-P, f = 7MHz

l

l

l

–1.0

–1.0

–1.2

±0.2

±0.2

±0.2

1.0

1.0

1.2

Deg

Deg

Deg

4V/V Gain

Filter Gain in 4V/V Configuration

Inputs at ±IN1 Pins, ±IN4 Pins Floating

ΔVIN = ±0.125V, DC

l

11.85

12

12.25

dB

Channel Separation

VINDIFF = 1VP-P, f = 3.5MHz

–100

dB

fO TC

Filter Cut-Off Frequency Temperature

Coefficient

BIAS = V+

BIAS = Floating

–55

–180

ppm/°C

ppm/°C

Noise

Integrated Output Noise

(BW = 10kHz to 14MHz)

61

μVRMS

Input Referred Noise Density (f = 1MHz) BIAS = V+

Figure 4, Gain = 1

Figure 4, Gain = 4

Figure 4, Gain = 5

21

5.2

4.2

nV/√Hz

nV/√Hz

nV/√Hz

en

Voltage Noise Density Referred to

Op Amp Inputs (f = 1MHz)

BIAS = V+

BIAS = Floating

2.1

2.6

nV/√Hz

nV/√Hz

in

Current Noise Density Referred to

Op Amp Inputs (f = 1MHz)

BIAS = V+

BIAS = Floating

3

2.1

pA/√Hz

pA/√Hz

HD2

2nd Harmonic Distortion

fIN = 3MHz; VIN = 2VP-P Single-Ended

BIAS = V+

BIAS = Floating, RLOAD = 400Ω

–96

–80

dBc

dBc

HD3

3rd Harmonic Distortion

fIN = 3MHz; VIN = 2VP-P Single-Ended

BIAS = V+

BIAS = Floating, RLOAD = 400Ω

–114

–95

dBc

dBc