Datasheet MIC7300BM5, MIC7300BMM Datasheet (MICREL)

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Page 1

MIC7300 Micrel

MIC7300

High-Output Drive Rail-to-Rail Op Amp

Preliminary Information

General Description

The MIC7300 is a high-performance CMOS operational amplifier featuring rail-to-rail input and output with strong output drive capability. It is able to source and sink in excess of 80mA into large capacitive loads.

The input common-mode range extends beyond the rails by 300mV, and the output voltage typically swings to within 150µV of both rails when driving a 100kΩ load.

The amplifier operates from 2.2V to 10V and is fully specified at 2.2V, 3V, 5V, and 10V. Gain bandwidth and slew rate are 500kHz and 0.5V/µs, respectively.

The MIC7300 is available in Micrel’s IttyBitty™ SOT-23-5 package for space-conscious circuits and in high-power MM8™ 8-lead MSOP for improved heat dissipation in higher power applications.

Pin Configurations

IN+

OUTV–

Part Identification

A17

Features

• Small footprint SOT-23-5 and power MSOP-8 packages

• >80mA peak output sink and source with 5V supply

• Drives large capacitive loads (6000pF with 10V supply)

• Guaranteed 2.2V, 3V, 5V, and 10V performance

• 500kHz gain-bandwidth product

• 0.01% total harmonic distortion at 1kHz (10V, 2kΩ)

• 1mA typical power supply current at 5V

Applications

• Battery-powered instrumentation

• PCMCIA, USB peripherals

• Portable computers and PDAs

Ordering Information

Part Number Temperature Range Package

MIC7300BM5 –40°C to +85°C SOT-23-5 MIC7300BMM –40°C to +85°C MSOP-8

IN–

V+

SOT-23-5 (M5)

Functional Configuration

OUTV–

V+

V+ IN– IN+

OUT

1 2 3 4

MSOP-8 (MM)

IN+

V–

IN–

SOT-23-5 (M5)

Pin Description

Pin Number Pin Number Pin Name Pin Function

SOT-23-5 MSOP-8

1 4 OUT Amplifier Output 2 5–8 V– Negative Supply: Negative supply for split supply application or ground for

single supply application. 3 3 IN+ Noninverting Input 4 2 IN– Inverting Input 5 1 V+ Positive Supply

IttyBitty and MM8 are trademarks of Micrel, Inc.

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

November 1999 1 MIC7300

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MIC7300 Micrel

Absolute Maximum Ratings (Note 1)

Supply Voltage (VV+ – VV–)...........................................12V

Differential Input Voltage (V I/O Pin Voltage (VIN, V

OUT

.............................................V

Junction Temperature (TJ) ...................................... +150°C

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

Lead Temperature (soldering, 10 sec.) .....................260°C

– V

IN+

), Note 3

) .......................±12V

IN–

+ 0.3V to V

V+

V–

– 0.3V

Operating Ratings (Note 2)

Supply Voltage (VV+ – VV–).............................. 2.2V to 10V

Junction Temperature (TJ) ......................... –40°C to +85°C

Max. Junction Temperature (T Package Thermal Resistance, Note 5

SOT-23-5 (θJA)..................................................260°C/W

MSOP-8 (θJA)......................................................85°C/W

Max. Power Dissipation............................................ Note 4

), Note 4 .........+125°C

J(max)

ESD, Note 6

DC Electrical Characteristics (2.2V)

VV+ = +2.2V, VV– = 0V, VCM = V

Symbol Parameter Condition Min Typ Max Units

TCV I

Input Offset Voltage 1.0 9 mV Input Offset Voltage Average Drift 1.0 µV/°C Input Bias Current 0.5 pA Input Offset Current 0.25 pA

Input Resistance >1 TΩ CMRR Common-Mode Rejection Ratio 0V ≤ VCM ≤ 2.2V, Note 9 45 65 dB V

Input Common-Mode Voltage input low, CMRR ≥ 45dB –0.3 0.0 V

±PSRR Power Supply Rejection Ratio VV+ = VV– = 1.1V to 2.5V, VCM = 0 55 75 dB C

Common-Mode Input Capacitance 3 pF

Output Swing output high, RL = 100k, 0.15 1 mV

Output Short Circuit Current sinking or sourcing, Note 8 20 40 mA

Supply Current V

= VV+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C

OUT

input high, CMRR ≥ 45dB 2.2 2.5 V

specified as VV+ – V output low, R

output high, R specified as VV+ – V

output low, R

output high, R specified as VV+ – V

output low, R

= V+/2 0.7 2.0 mA

OUT

= 100k 0.15 1 mV

= 2k 10 33 mV

OUT

= 2k 10 33 mV

= 600Ω 33 110 mV

OUT

= 600Ω 33 110 mV

; Note 7

; unless noted

1 mV

50 mV

165 mV

AC Electrical Characteristics (2.2V)

VV+ = 2.2V, VV– = 0V, VCM = V

Symbol Parameter Condition Min Typ Max Units

SR Slew Rate 0.5 V/µs GBW Gain-Bandwidth Product 0.55 MHz

Phase Margin CL = 0pF 80 °

Gain Margin 10 dB

MIC7300 2 November 1999

= VV+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C

OUT

CL = 2500pF 40 °

; Note 7

; unless noted

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MIC7300 Micrel

DC Electrical Characteristics (3.0V)

VV+ = +3.0V, VV– = 0V, VCM = V

Symbol Parameter Condition Min Typ Max Units

TCV I

Input Offset Voltage 1.0 9 mV Input Offset Voltage Average Drift 1.0 µV/°C Input Bias Current 0.5 pA Input Offset Current 0.25 pA

Input Resistance >1 TΩ CMRR Common-Mode Rejection Ratio 0V ≤ VCM ≤ 3.0V, Note 9 50 70 dB V

Input Common-Mode Voltage input low, CMRR ≥ 50dB –0.3 0 V

±PSRR Power Supply Rejection Ratio VV+ = VV– = 1.5V to 5.0V, VCM = 0 55 75 dB C V

I I

IN OUT

SC S

Common-Mode Input Capacitance 3 pF

Output Swing output high, RL = 100k 0.2 1 mV

Output Short Circuit Current sinking or sourcing, Note 8 60 95 mA

Supply Current 0.8 2.2 mA

= VV+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C

OUT

input high, CMRR ≥ 50dB 3.0 3.3 V

specified as VV+ – V output low, R

output high, R specified as VV+ – V

output low, R

output high, R specified as VV+ – V

output low, R

OUT

= 100k 0.2 1 mV

= 2k 10 33 mV

OUT

= 2k 10 33 mV

= 600Ω 33 110 mV

OUT

= 600Ω 33 110 mV

; Note 7

; unless noted

1 mV

50 mV

165 mV

AC Electrical Characteristics (3V)

VV+ = 3V, VV– = 0V, VCM = 1.5V, V

Symbol Parameter Condition Min Typ Max Units

SR Slew Rate 0.5 V/µs GBW Gain-Bandwidth Product 0.45 MHz

Phase Margin CL = 0pF 85 °

Gain Margin 10 dB

November 1999 3 MIC7300

= VV+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C

OUT

CL = 3500pF 40 °

; Note 7

; unless noted

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MIC7300 Micrel

DC Electrical Characteristics (5V)

VV+ = +5.0V, VV– = 0V, VCM = 1.5V, V

Symbol Parameter Condition Min Typ Max Units

TCV I

Input Offset Voltage 1.0 9 mV Input Offset Voltage Average Drift 1.0 µV/°C Input Bias Current 0.5 pA Input Offset Current 0.25 pA

Input Resistance >1 TΩ CMRR Common-Mode Rejection Ratio 0V ≤ VCM ≤ 5V, Note 9 55 80 dB V

Input Common-Mode Voltage input low, CMRR ≥ 55dB –0.3 –0.0 V

±PSRR Power Supply Rejection Ratio VV+ = VV– = 2.5V to 5.0V, VCM = 0 55 75 dB C V

I I

IN OUT

SC S

Common-Mode Input Capacitance 3 pF

Output Swing output high, RL = 100k 0.3 1.0 mV

Output Short Circuit Current sinking or sourcing, Note 8 85 105 mA

Supply Current V

= VV+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C; Note 7; unless noted

OUT

input high, CMRR ≥ 55dB 5.0 5.3 V

specified as VV+ – V output low, R

output high, R specified as VV+ – V

output low, R

= 100k 0.3 1.0 mV

= 2k 15 50 mV

OUT

1.5 mV

75 mV

output high, R specified as VV+ – V

output low, R

= 600Ω 50 165 mV

OUT

= 600Ω 50 165 mV

250 mV

= V+/2 1.0 2.8 mA

OUT

AC Electrical Characteristics (5V)

VV+ = 5V, VV– = 0V, VCM = 1.5V, V

Symbol Parameter Condition Min Typ Max Units

THD Total Harmonic Distortion f = 1kHz, A

SR Slew Rate 0.5 V/µs GBW Gain-Bandwidth Product 0.4 MHz

Phase Margin CL = 0pF 85 °

Gain Margin 10 dB

MIC7300 4 November 1999

= VV+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C

OUT

= –2, 0.05 %

RL = 2kΩ, V

OUT

= 4.0 V

CL = 4500pF 40 °

; Note 7

; unless noted

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MIC7300 Micrel

DC Electrical Characteristics (10V)

VV+ = +10V, VV– = 0V, VCM = 1.5V, V

Symbol Parameter Condition Min Typ Max Units

TCV I

Input Offset Voltage 1.0 9 mV Input Offset Voltage Average Drift 1.0 µV/°C Input Bias Current 0.5 pA Input Offset Current 0.25 pA

Input Resistance >1 TΩ CMRR Common-Mode Rejection Ratio 0V ≤ VCM ≤ 10V, Note 9 60 85 dB V

Input Common-Mode Voltage input low, V+ = 10V, CMRR ≥ 60dB –0.3 –0.0 V

±PSRR Power Supply Rejection Ratio VV+ = VV– = 2.5V to 5.0V, VCM = 0 55 75 dB A

C V

I I

IN OUT

SC S

Large Signal Voltage Gain sourcing or sinking, 80 340 V/mV

Common-Mode Input Capacitance 3 pF

Output Swing output high, RL = 100k 0.5 1.5 mV

Output Short Circuit Current sinking or sourcing, Notes 8 90 115 mA

Supply Current V

= VV+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C; Note 7; unless noted

OUT

input high, V+ = 10V, CMRR ≥ 60dB 10.0 10.3 V

RL = 2k, Note 10 sourcing or sinking, 15 300 V/mV

RL = 600Ω, Note 10

specified as VV+ – V output low, R

= 100k 0.5 1.5 mV

OUT

2.5 mV

output high, R specified as VV+ – V

output low, R

= 2k 24 80 mV

OUT

= 2k 24 80 mV

120 mV

output high, R specified as VV+ – V

output low, R

= 600Ω 80 270 mV

OUT

= 600Ω 80 270 mV

400 mV

= V+/2 1.5 4.0 mA

OUT

AC Electrical Characteristics (10V)

VV+ = 10V, VV– = 0V, VCM = 1.5V, V

Symbol Parameter Condition Min Typ Max Units

THD Total Harmonic Distortion f = 1kHz, A

SR Slew Rate V+ = 10V, Note 11 0.5 V/µs

GBW Gain-Bandwidth Product 0.37 MHz

Phase Margin CL = 0pF 85 °

Gain Margin 10 dB

Input-Referred Voltage Noise f = 1kHz, VCM = 1V 37

Input-Referred Current Noise f = 1kHz 1.5

November 1999 5 MIC7300

= VV+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C

OUT

= –2, 0.01 %

RL = 2k, V

OUT

= 8.5 V

CL = 6000pF 40 °

; Note 7

; unless noted

V/µs

nV/ Hz

fA/ Hz

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MIC7300 Micrel

Note 1. Exceeding the absolute maximum rating may damage the device. Note 2. The device is not guaranteed to function outside its operating rating. Note 3. I/O Pin Voltage is any external voltage to which an input or output is referenced. Note 4. The maximum allowable power dissipation is a function of the maximum junction temperature, T

resistance, θJA; and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: PD = (T

– TA) ÷ θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature.

J(max)

Note 5. Thermal resistance, θJA, applies to a part soldered on a printed-circuit board. Note 6. Devices are ESD protected; however, handling precautions are recommended. Note 7. All limits guaranteed by testing or statistical analysis. Note 8. Continuous short circuit may exceed absolute maximum TJ under some conditions. Note 9. CMRR is determined as follows: The maximum ∆VOS over the VCM range is divided by the magnitude of the VCM range. The measurement

points are: VV–, (VV+ – VV–)/2, and VV+.

Note 10. RL connected to 5V. Sourcing: 5V ≤ V

≤ 10V. Sinking: 2.5V ≤ V

OUT

≤ 5V.

Note 11. Device connected as a voltage follower with a 10V step input. The value is the positive or negative slew rate, whichever is slower.

; the junction-to-ambient thermal

J(max)

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MIC7300 Micrel

100

1000

10000

-40 0 40 80 120 160

INPUT CURRENT (pA)

JUNCTION TEMPERATURE (°C)

0.01

0.1

100

1000

0.001 0.01 0.1 1 10

CURRENT SINK / SOURCE (mA)

OUTPUT VOLTAGE (V)

1000

2000

3000

4000

5000

6000

7000

246810

LOAD CAPACITANCE (pF)

SUPPLY VOLTAGE (V)

Typical Characteristics

Input Current vs.

Junction Temperature

TA = 25°C

Sink / Source Currents

vs. Output Voltage

TA = 25°C

November 1999 7 MIC7300

Capacitive Load Capability

vs. Supply Voltage

TA = 25°C

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MIC7300 Micrel

Application Information

Input Common-Mode Voltage

The MIC7300 tolerates input overdrive by at least 300mV beyond either rail without producing phase inversion.

If the absolute maximum input voltage is exceeded, the input current should be limited to ±5mA maximum to prevent reducing reliability. A 10kΩ series input resistor, used as a current limiter, will protect the input structure from voltages as large as 50V above the supply or below ground. See Figure

10kΩ

Figure 1. Input Current-Limit Protection

Output Voltage Swing

Sink and source output resistances of the MIC7300 are equal. Maximum output voltage swing is determined by the load and the approximate output resistance. The output resistance is:

OUT

is the voltage dropped within the amplifier output

DROP

stage. V

DROP

and I

DROP

LOAD

can be determined from the V (output swing) portion of the appropriate Electrical Characteristics table. I minus V+/2 and divided by R

is equal to the typical output high voltage

LOAD

Electrical Characteristics DC (5V) table, the typical output high voltage using a 2kΩ load (connected to V+/2) is 4.985V, which produces an I

4.985V 2.5V

 



−

Ω

LOAD

 



of:

1.243mA

Voltage drop in the amplifier output stage is:

= 5.0V – 4.985V

DROP

= 0.015V

DROP

Because of output stage symmetry, the corresponding typical output low voltage (0.015V) also equals V

OUT

0.015V

==2Ω

0.001243A

Power Dissipation

The MIC7300 output drive capability requires considering power dissipation. If the load impedance is low, it is possible to damage the device by exceeding the 125°C junction temperature rating.

On-chip power consists of two components: supply power and output stage power. Supply power (PS) is the product of the supply voltage (VS = VV+ – VV–) and supply current (IS).

OUT

. For example, using the

. Then:

DROP

Output stage power (PO) is the product of the output stage voltage drop (V

) and the output (load) current (I

DROP

Total on-chip power dissipation is:

PD = PS + P PD = VSIS + V

DROPIOUT

where:

PD = total on-chip power PS = supply power dissipation PO = output power dissipation VS = VV+ – V

V–

IS = power supply current V

DROP

= VV+ – V = V

OUT

– V

OUT

V–

(sourcing current) (sinking current)

The above addresses only steady state (dc) conditions. For non-dc conditions the user must estimate power dissipation based on rms value of the signal.

The task is one of determining the allowable on-chip power dissipation for operation at a given ambient temperature and power supply voltage. From this determination, one may calculate the maximum allowable power dissipation and, after subtracting PS, determine the maximum allowable load current, which in turn can be used to determine the miniumum load impedance that may safely be driven. The calculation is summarized below.

D(max)

JA(SOT-23-5)

JA(MSOP-8)

−

J(max) A

= 260°C/W

= 85°C/W

Driving Capacitive Loads

Driving a capacitive load introduces phase-lag into the output signal, and this in turn reduces op-amp system phase margin. The application that is least forgiving of reduced phase margin is a unity gain amplifier. The MIC7300 can typically drive a 2500pF capacitive load connected directly to the output when configured as a unity-gain amplifier and powered with a 2.2V supply. At 10V operation the circuit typically drives 6000pF. Phase margin is typically 40°.

Using Large-Value Feedback Resistors

A large-value feedback resistor (> 500kΩ) can reduce the phase margin of a system. This occurs when the feedback resistor acts in conjunction with input capacitance to create phase lag in the feedback signal. Input capacitance is usually a combination of input circuit components and other parasitic capacitance, such as amplifier input capacitance and stray printed circuit board capacitance.

Figure 2 illustrates a method of compensating phase lag caused by using a large-value feedback resistor. Feedback capacitor CFB introduces sufficient phase lead to overcome

OUT

MIC7300 8 November 1999

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MIC7300 Micrel

the phase lag caused by feedback resistor RFB and input

V+

2.2V to 10V

capacitance CIN. The value of CFB is determined by first

estimating CIN and then applying the following formula:

R C R C

×≤ ×

IN IN FB FB

OUT

Figure 2. Cancelling Feedback Phase Lag

Since a significant percentage of CIN may be caused by board layout, it is important to note that the correct value of CFB may change when changing from a breadboard to the final circuit layout.

Typical Circuits

Some single-supply, rail-to-rail applications for which the MIC7300 is well suited are shown in the circuit diagrams of Figures 3 through 7.

V+

2.2V to 10V

0V to

V+

MIC7300

OUT

0V to V+

910k

R1 100k

Figure 3a. Noninverting Amplifier

0V to V+

Figure 4. Voltage Follower/Buffer

V+

2.2V to 10V

0V to 2V

MIC7300

Change Q1 and R for higher current

and/or different gain.

OUT

Figure 5. Voltage-Controlled Current Sink

0.001µF

V+

100k

R3 100k

MIC7300

0.5V to Q1 V

0V to V+

OUT

CEO(sus)

0V to V+

Load

OUT

Q1 2N3904

10Ω

⁄2W

100mA/V as shown

100k

V+

MIC7300

100k

= V

OUT

{

V+ 0V

OUT

CEO

C(max)

= 40V

= 200mA

OUT

100

V+

(V)

OUT

0 100

=+ ≈10

VIN (V)

R2 R1

Figure 3b. Noninverting Amplifier Behavior

Figure 6. Square Wave Oscillator

V+

33k

330k

V+

C1 1µF

MIC7300

330k

OUT

R2R1330k

=− = =−

OUT

33k

Figure 7. AC-Coupled Inverting Amplifier

November 1999 9 MIC7300

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MIC7300 Micrel

Package Information

1.90 (0.075) REF

0.95 (0.037) REF

3.02 (0.119)

2.80 (0.110)

0.122 (3.10)

0.112 (2.84)

0.036 (0.90)

0.032 (0.81)

0.50 (0.020)

0.35 (0.014)

1.75 (0.069)

1.50 (0.059)

1.30 (0.051)

0.90 (0.035)

SOT-23-5 (M5)

0.199 (5.05)

0.187 (4.74)

0.120 (3.05)

0.116 (2.95)

0.15 (0.006)

0.00 (0.000)

0.043 (1.09)

0.038 (0.97)

0.012 (0.30) R

3.00 (0.118)

2.60 (0.102)

10°

0°

DIMENSIONS:

MM (INCH)

0.20 (0.008)

0.09 (0.004)

0.60 (0.024)

0.10 (0.004)

DIMENSIONS:

INCH (MM)

0.007 (0.18)

0.005 (0.13)

0.012 (0.03)

0.0256 (0.65) TYP

0.008 (0.20)

0.004 (0.10)

8-Pin MSOP (MM)

5° MAX

0° MIN

0.012 (0.03) R

0.039 (0.99)

0.035 (0.89)

0.021 (0.53)

MIC7300 10 November 1999

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MIC7300 Micrel

November 1999 11 MIC7300

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MIC7300 Micrel

MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB http://www.micrel.com

This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or

other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.

MIC7300 12 November 1999