dallas semiconductor DS4812 service manual

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PRELIMINARY

DS4812

Low Voltage, High Slew Rate,

Rail-To-Rail Dual Op-Amp

FEATURES

 High Slew Rate: 10V/µs  High Gain Bandwidth: 6.5 MHz  Supply Voltage Range 2.5 to 5.5V  Rail-to-Rail Output Swing  1.75 mA Supply Current per Channel

ORDERING INFORMATION

Part Number Description

DS4812 8-pin DIP DS4812S 8-pin SOIC DS4812U DS4812X 8-bump CSP

For mechanical dimensions see web site.

8-pin µ-SOP

PACKAGES/PINOUTS

1

AOUT

2

AIN-

A

-

+

3

AIN+

45

GND

300-mil DIP

150-mil SOIC

118-mil µ-SOP

VDD

1

AOUT

A

-

+

2

AIN-

3

AIN+

GND

8

VDD

7

BOUT

B

-

+

6

BIN-

BIN+

8

7

BOUT

B

-

+

6

BIN-

5

BIN+

4

8-bump CSP

DESCRIPTION

The DS4812 BiCMOS dual operational amplifier combines high slew rate and rail-to-rail output swing. The device provides 10V/µs of slew rate and 6.5 MHz of bandwidth while only consuming 1.5 mA of supply current per channel. Ideal low voltage BiFET substitute for low gain, high speed applications.

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ABSOLUTE MAXIMUM RATINGS

Supply Voltage, VDD (see Note 1)............5.5V

DS4812

Differential Input Voltage (see Note 2)....± V

Input Voltage Range, VI(see Note 1) .......-0.3V to V

DD

Input Current, IDD.....................................± 4 mA

Output Current, IO....................................± 50 mA

Total current into VDD..............................± 50 mA

Total current out of GND.........................± 50 mA

Duration of short-circuit current (See Note 3) unlimited

Operating Temperature............................0 oC to +70 oC

Storage Temperature................................-55 oC to +125 oC

Soldering Temperature.............................See J-STD-020A Specification

NOTES:

1. Relative to GND.

2. Non-inverting input relative to inverting input. Excessive current flows when input is brought below

GND - 0.3V.

3. The output may be shorted to either supply. Temperature and/or supply voltages must be limited to

ensure that the maximum dissipation rating is not exceeded.

RECOMMENDED OPERATING CONDITIONS

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Supply Voltage V Input Voltage Range V Common-Mode Input Voltage V Free-Air Operating Temperature T

DD

I

CM

A

2.5 5.5 V 1 0V 0V 070

- 1.7 V 1

DD

- 1.7 V

DD

o

C

NOTES:

1. Voltage referenced to GND.

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ELECTRICAL CHARACTERISTICS

DS4812

Conditions: (T

: 0°C – 70°C. VDD = 3.0V)

A

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Input Offset Voltage

= 0.5V, RS = 50Ω, V

(V

IC

OUT

= 1.5V)

V

IO

15mV

Temperature Coefficient of Input Offset Voltage (V

= 0.5V, RS = 50Ω, V

IC

OUT

= 1.5V) Input Offset Current (V

= 0.5V, RS = 50Ω, V

IC

OUT

= 1.5V) Input Bias Current (V

= 0.5V, RS = 50Ω, V

IC

OUT

= 1.5V) Common-mode Input Voltage Range

| ≤ 10mV

|V

IO

High Level Output Voltage (IOH = -0.5 mA) Low Level Output Voltage (IOL = 0.5 mA)

αV

I

V

IO

IB

ICR

OH

OL

IO

0 1.3 V

2.5 2.8 V

10

µV/°C

1 500 pA

2 500 pA

0.15 0.5 V

Large Signal Differential Voltage Amplification (V

= 0.5V, RL = 10 kΩ, 1V ≤ VO ≤ 2V)

IC

Common Mode Input Capacitance c Common Mode Rejection Ratio (0V ≤ V

≤ 1.0V, VO = 1.5V)

IC

A

VD

i(c)

60 68 dB

4pF

CMRR 40 50 dB

Supply Voltage Rejection Ratio (3V ≤ V

DD

≤ 5V, V

= VDD/2 – 1V, no

IC

k

SVR

70 80 dB load) Amplifier Supply Current (per channel) (VO = 1.5V, no load) Slew Rate at Unity Gain

= 50 pF)

(C

L

Unity Gain Bandwidth (CL = 50 pF) Phase Margin at Unity Gain

= 50 pF)

(C

L

Gain Margin (CL = 50 pF)

I

DD

SR 5 7.5

1.5 2.5 mA

V/µs

UGBW 5.0 MHz

φ

M

54 Degree

6dB

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ELECTRICAL CHARACTERISTICS cont.

DS4812

Conditions: (T

: 0°C – 70°C. VDD = 5.0V)

A

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Input Offset Voltage

= 1.5V, RS = 50Ω, V

(V

IC

OUT

= 2.5V)

V

IO

15mV

Temperature Coefficient of Input Offset Voltage (V

= 1.5V, RS = 50Ω, V

IC

OUT

= 2.5V) Input Offset Current (V

= 1.5V, RS = 50Ω, V

IC

OUT

= 2.5V) Input Bias Current (V

= 1.5V, RS = 50Ω, V

IC

OUT

= 2.5V) Common-mode Input Voltage Range

| ≤ 10 mV

|V

IO

High Level Output Voltage (IOH = -1.0 mA) Low Level Output Voltage (IOL = 1.0 mA)

αV

I

V

IO

IB

ICR

OH

OL

IO

0 3.3 V

4.5 4.8 V

10

µV/°C

1 500 pA

2 500 pA

0.15 0.5 V

Large Signal Differential Voltage Amplification (V

= 1.5V, RL = 10 kΩ, 1.5V ≤ VO ≤ 3.5V)

IC

Common Mode Input Capacitance c Common Mode Rejection Ratio (0V ≤ V

≤ 2.7V, VO = 2.5V)

IC

Supply Voltage Rejection Ratio (3V ≤ V

DD

≤ 5V, V

= VDD/2 – 1V, no load)

IC

Amplifier Supply Current (per channel) (VO = 2.5V, no load) Slew Rate at Unity Gain (CL = 50 pF) Unity Gain Bandwidth (C

= 50 pF)

L

Phase Margin at Unity Gain (C

= 50 pF)

L

Gain Margin

= 50 pF)

(C

L

A

VD

i(c)

60 72 dB

4pF

CMRR 45 55 dB

k

SVR

I

DD

SR 7 10

70 80 dB

1.75 2.5 mA

V/µs

UGBW 6.5 MHz

φ

M

46 Degree

4dB

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DISTRI BUTIO N OF DS481 2

INPUT OFFSET VOLTAG E

30%

VDD = 3.0 V

25%

= 10K

R

L

T

= 25oC

A

20%

15%

10%

5%

Percentage of Amplifiers - %

0%

-2.0 -1.6 -1.2 -0.8 -0.4 0.0 0.4 0.8 1.2 1.6 2.0

V

- I nput O f f set Voltage - m V

IO

Figure 1.0

DS4812

Percentage of Amplifiers - %

DISTRI BUTI ON O F DS481 2

INPUT OFFSET VOLTAGE

35%

30%

25%

VDD = 5. 0 V R

= 10K

L

T

= 25oC

A

20%

15%

10%

5%

0%

-2 -1.6 -1.2 -0.8 -0.4 0 0.4 0.8 1.2 1.6 2

V

- Input Off set Vol t age - m V

IO

Figure 2.0

5 of 19

DS4812

V

INPUT O FF SET VO L TAG E

vs

COMM ON- MODE I N PUT V OLTAGE

5 4 3

VDD = 3. 0 V T

= 25oC

A

2 1 0

-1

-2

-3

- Input Offset Voltage - m

IO

V

-4

-5

-0.5 0 0.5 1 1.5 2

V

- Common-Mode Input Voltage - V

IC

Figure 3.0

INPUT O FF SET VO L TAG E

vs

COMMON-MODE INPUT VOLTAGE

5 4 3

VDD = 5. 0 V

= 25oC

T

A

2 1 0

-1

-2

- Input Offset Voltage - m

-3

IO

V

-4

-5

-0.500.511.522.533.54

V

- Common-Mode Input Voltage - V

IC

Figure 4.0

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