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OPA698M

SGLS287A – MAY 2005 – REVISED MARCH 2006

ELECTRICAL CHARACTERISTICS (continued)

V

S = 5 V, VICM = 2.5 V, RL = 500 Ω, limiter pins open (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

3.5

M

Ω

Input impedance, common mode

1

pF

OUTPUT

VICM

VICM

TA = 25°C

±1.4

±1.6

VH = VICM + 1.8 V,

Output voltage range (VOH, VOL)

V

VL = VICM– 1.8 V, RL≥ 500 Ω

VICM

TA = Full range

±1.3

TA = 25°C

70

105

Current output, sourcing (IOH)

VS = ±2.5 V, RL = 20 Ω

mA

TA = Full range

60

TA = 25°C

–60

–90

Current output, sinking (IOL)

VS = ±2.5 V, RL = 20 Ω

mA

TA = Full range

–50

Closed-loop output impedance

G = +1, RF = 25 Ω, f < 100 kHz

0.2

Ω

POWER SUPPLY

Operating voltage (VS)

5

12

V

TA = 25°C

13.5

14.3

15

Quiescent current (IS)

mA

TA = Full range

12

16.5

Power supply rejection ratio (PSRR)

Input referred, VS = 4 V to 6 V

TA = Full range

58

72

dB

OUTPUT VOLTAGE LIMITERS (pins 5 and 8)

VICM

VICM

TA = 25°C

V

±0.8

±1.1

Default output limited voltage

Limiter pins open

VICM

TA = Full range

V

±0.6

Limiter output offset voltage

(VO – VH) or (VO – VL)

TA = Full range

±15

±50

mV

TA = 25°C

40

50

65

Limiter input bias current magnitude(4)

VO = 2.5 V

µA

TA = Full range

35

70

Limiter input bias current drift

30

nA/°C

3.4

M

Ω

Limiter input impedance

1

pF

Limiter feedthrough(5)

f = 5 MHz

–60

dB

VICM

Maximum limiter voltage

V

±1.8

Minimum limiter voltage separation

400

mV

Op amp bias current shift (2)

5

µA

Limiter small signal bandwidth

VI = VICM ± 1.2 V, VO < 0.02 Vp-p

450

MHz

Limter slew rate(6)

100

V/µA

Limiter step response, overshoot

VI = VICM ± 1.2 V

55

mV

Limiter step response, recovery time

VI = VICM ± 1.2 V

3

ns

Linearity guardband(7)

VO = 2 Vp-p, f = 5 MHz

30

mV

(4)

IVH(VH bias current) is positive and IVL (VL bias current) is negative under these conditions. See Note 2, Figure 47 and Figure 66.

(5)

Limiter feedthrough is the ratio of the output magnitude to the sine wave added to VH (or VL) when VIN = 0.

(6)

VH slew rate conditions are: VIN = VICM +4 V, G = +2, VL = VICM – 2 V, VH = stepped between VICM + 1.2 V and VICM. VL slew rate

conditions are similar.

(7)

Linearity Guardband is defined for an output sinusoid (f = 5 MHz, VO = 0 VDC ±1 VP-P) centered between the limiter levels (VH and VL).

It is the difference between the limiter level and the peak output voltage where SFDR decreases by 3 dB (see Figure 67).

5

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