Features. Ordering Information. * Underbar marking may not be to scale. Part Identification

(1)

MIC861

Teeny™ Ultra Low Power Op Amp

General Description

The MIC861 is a rail-to-rail output, input common-mode to ground, operational ampliﬁer in Teeny™ SC70 packaging.

The MIC861 provides 400kHz gain-bandwidth product while consuming an incredibly low 4.6µA supply current.

The SC70 packaging achieves signiﬁcant board space savings over devices packaged in SOT-23 or MSOP-8 packaging.

The SC70 occupies approximately half the board area of a SOT-23 package.

Features

• Teeny™ SC70 packaging

• 400kHz gain-bandwidth product

• 650kHz, –3dB bandwidth

• 4.6µA supply current

• Rail-to-Rail output

• Ground sensing at input (common mode to GND)

• Drives large capactive loads (1000pF)

• Unity gain stable

Applications

• Portable equipment

• PDAs

• Pagers

• Cordless Phones

• Consumer Electronics

Pin Conﬁguration

OUT V+

IN− IN+

1 3

4 5

2

V−

A33

PartIdentification

SC-70

Functional Pinout

OUT V+

IN− IN+

1 3

4 5

2

V−

Ordering Information

Part Number Ambient

Temp. Range Package Standard Marking Pb-Free Marking*

MIC861BC5 A33 MIC861YC5 A33 –40ºC to +85ºC SC-70-5

* Underbar marking may not be to scale.

(2)

Absolute Maximum Ratings

^{(Note 1)}

Supply Voltage (V_V+ – V–) ...+6.0V Differentail Input Voltage (V_IN+ – V_IN–), Note 4 ...+6.0V Input Voltage (V_IN+ – V_IN–) ...V₊ + 0.3V, V_– –0.3V Lead Temperature (soldering, 5 sec.) ... 260°C Output Short Circuit Current Duration ...Indeﬁnite Storage Temperature (T_S) ... 150°C ESD Rating, Note 3

Operating Ratings

^{(Note 2)}

Supply Voltage (V+ – V–) ... +2.43V to +5.25V Ambient Temperature Range ... –40°C to +85°C Package Thermal Resistance ... 450°C/W

Electrical Characteristics

V+ = +2.7V, V– = 0V, V_CM= V+/2; R_L= 500kΩ to V+/2; T_A= 25°C, unless otherwise noted. Bold values indicate –40°C≤ T_A≤ +85°C.

Symbol Parameter Condition Min Typ Max Units

V_OS Input Offset Voltage Note 5 –10 2 10 mV

Input Offset Voltage Temp Coefﬁcient 15 µV/°C

I_B Input Bias Current 20 pA

I_OS Input Offset Current 10 pA

V_CM Input Voltage Range CMRR > 60dB 1.8 V

CMRR Common-Mode Rejection Ratio 0 < V_CM< 1.35V 45 77 dB

PSRR Power Supply Rejection Ratio Supply voltage change of 3V 50 83 dB

A_VOL Large-Signal Voltage Gain R_L = 100k, V_OUT 2Vpeak to peak 60 74 dB

R_L = 500k, V_OUT 2Vpeak to peak 73 83 dB

V_OUT Maximum Output Voltage Swing R_L= 500k V+–2mV V+–0.7mV V

V_OUT Minimum Output Voltage Swing R_L= 500k V–+0.2mV V–+ 2mV V

GBW Gain-Bandwidth Product R_L = 200kΩ, C_L = 2pF, V_OUT = 0 350 kHz

BW –3dB Bandwidth A_V = 1, C_L = 2pF, R_L = 1MΩ 500 kHz

SR Slew Rate A_V = 1, C_L = 2pF, R_L = 1MΩ 0.12 V/µs

I_SC Short-Circuit Output Current Source 6 mA

Sink 5 mA

I_S Supply Current No Load 4.2 9 µA

V+= +5V, V–= 0V, V_CM= V+/2; R_L= 500kΩ to V+/2; T_A= 25°C, unless otherwise noted. Bold values indicate –40°C≤ T_A≤ +85°C.

V_OS Input Offset Voltage Note 5 –10 2 10 mV

Input Offset Voltage Temp Coefﬁcient 15 µV/°C

I_B Input Bias Current 20 pA

I_OS Input Offset Current 10 pA

V_CM Input Voltage Range CMRR > 60dB 4.2 V

CMRR Common-Mode Rejection Ratio 0 < V_CM< 3.5V 60 80 dB

PSRR Power Supply Rejection Ratio Supply voltage change of 1V 45 85 dB

A_VOL Large-Signal Voltage Gain R_L = 100k, V_OUT 4.0Vpeak to peak 60 76 dB R_L = 500k, V_OUT 4.0Vpeak to peak 68 83 dB

V_OUT Maximum Output Voltage Swing R_L= 500k V+–2mV V+–0.7mV V

V_OUT Minimum Output Voltage Swing R_L= 500k V–+0.7mV V–+ 2mV V

GBW Gain-Bandwidth Product R_L = 200kΩ, C_L = 2pF, V_OUT = 0 400 kHz

BW –3dB Bandwidth A_V = 1, C_L = 2pF, R_L = 1MΩ 650 kHz

(3)

Symbol Parameter Condition Min Typ Max Units

SR Slew Rate A_V = 1, C_L = 2pF, R_L = 1MΩ 0.12 V/µs

I_SC Short-Circuit Output Current Source 10 24 mA

Sink 10 24 mA

I_S Supply Current No Load 4.6 9 µA

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. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. Pin 4 is ESD sensetive Note 4. Exceeding the maximum differential input voltage will damage the input stage and degrade performance (in particular, input bias current is

likely to increase.

Note 5. The offset voltage distribution is centered around 0V. The typical offset number shown, is equal to the standard deviation of the voltage offset distribution.

(4)

Test Circuits

Test Circuit 1. A_V= 11 Test Circuit 2:A_V= 2

Test Circuit 3. A_V= 1

48k 170k

10k 10k

10µF 0.1µF 10µF

50Ω

100µF

0.1µF

10µF 100µF All resistors:

1% metal film

Output Input

V+

V—

MIC861 ^BNC

BNC

Test Circuit 5. Positive Power Supply Rejection Ratio Measurement Test Circuit 4. A_V= –1

(5)

DC Performance Characteristics

0 1 2 3 4 5

0 5 10 15 20 25 30

OUTPUT CURRENT (mA) Output Voltage vs.

Output Current

85°C

25°C

-40°C Sinking

0 1 2 3 4 5

85°C 25°C

-40°C Sourcing

0 5 10 15 20 25 30

0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 SUPPLY VOLTAGE (±V) Short Circuit Current vs.

Supply Voltage

85°C 25°C -40°C Sourcing

0 5 10 15 20 25 30

0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 SUPPLY VOLTAGE (±V) Short Circuit Current vs.

Supply Voltage

85°C 25°C

-40°C Sinking

0.5 0.6 0.7 0.8 0.9 1 1.1

0 0.5 1 1.5 2 2.5

COMMON-MODE VOLTAGE (V) Offset Voltage vs.

Common-Mode Voltage 85°C

–40°C 25°C V+ = 2.7V

0.5 0.6 0.7 0.8 0.9 1 1.1

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 COMMON-MODE VOLTAGE (V)

Offset Voltage vs.

Common-Mode Voltage

–40°C 85°C 25°C V+ = 5V

0 1 2 3 4 5 6 7 8 9

0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 SUPPLY VOLTAGE (V)

Offset Voltage vs.

Supply Voltage 85°C 25°C -40°C

0 20 40 60 80 100

0.1 1 10 100 1000 10000 RESISTIVE LOAD (kΩ) Open Loop Gain vs.

Resistive Load

V+ = 5V V+ = 2.7V

-6 -5 -4 -3 -2 -1 0

-40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Offset Voltage vs.

Temperature

5V

2.7V

0 1 2 3 4 5 6 7

-40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Supply Current vs.

Temperature 5V

2.7V

0 5 10 15 20 25 30

-40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Short Circuit Current

vs. Temperature

5V

2.7V Sourcing

-30 -25 -20 -15 -10 -5 0

-40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Short Circuit Current

vs. Temperature

5V 2.7V Sinking 0 -5 -10 -15 -20 -25 -30 -35 -40OUTPUT CURRENT (mA)

Output Voltage vs.

Output Current

(6)

AC Perfomance Characteristics

Gain Bandwidth and Phase Margin

1k 10k 100k 1M -225

-180 -135 -90 -45 0 45 90 135 180 225

-50 -40 -30 -20 -10 0 10 20 30 40 50

FREQUENCY (Hz) Av = 11

V+ = 2.5V V– = –2.5V C_L = 2pF R_F = 200kΩ

-50 -40 -30 -20 -10 0 10 20 30 40 50

FREQUENCY (Hz) Gain Bandwidth and Phase Margin

1k 10k 100k 1M

Av = 11 V+ = 1.35V V- = –1.35V C_L = 2pF R_F = 200kΩ

-225 -180 -135 -90 -45 0 45 90 135 180 225 25

75 125 175 225 275 325 375 425

1 10 100 1000

CAPACITIVE LOAD (pF) Gain Bandwidth vs.

Capacitive Load 5V

2.7V

-10 0 10 20 30 40 50 60 70 80 90

FREQUENCY (Hz) PSRR vs.

Frequency

1 10 100 1k 10k 100k 1M V+ = 5V

0 10 20 30 40 50 60 70 80 90

FREQUENCY (Hz) CMRR vs.

Frequency

1 10 100 1k 10k 100k 1M V+= 5V

-20 0 20 40 60 80 100

FREQUENCY (Hz) PSRR vs.

Frequency

1 10 100 1k 10k 100k 1M V+ = 2.7V

0 20 40 60 80 100

FREQUENCY (Hz) CMRR vs.

Frequency

1 10 100 1k 10k 100k 1M V+ = 2.7V

-50 -40 -30 -20 -10 0 10 20 30 40 50

FREQUENCY (Hz) Gain Bandwidth and Phase Margin

1k 10k 100k 1M

Av = 2 V+ = 2.5V V- = –2.5V C_L = 2pF R_F = 20kΩ

-225 -180 -135 -90 -45 0 45 90 135 180 225

-50 -40 -30 -20 -10 0 10 20 30 40 50

FREQUENCY (Hz) Gain Frequency Response

1k 10k 100k 1M

Av = 2 V+ = 1.35V V- = –1.35V C_L = 2pF R_F = 20kΩ

-225 -180 -135 -90 -45 0 45 90 135 180 225

-50 -40 -30 -20 -10 0 10 20 30 40 50

FREQUENCY (Hz) Unity Gain Frequency Response

1k 10k 100k 1M

Av = 1 V+ = 2.5V V– = –2.5V R_L = 1MΩ

-225 -180 -135 -90 -45 0 45 90 135 180 225

-50 -40 -30 -20 -10 0 10 20 30 40 50

FREQUENCY (Hz) Unity Gain Frequency Response

1k 10k 100k 1M

Av = 1 V+ = 1.35V V– = –1.35V R_L = 1MkΩ

-225 -180 -135 -90 -45 0 45 90 135 180 225

(7)

Close-loop Unity Gain Frequency Response

FREQUENCY (Hz) 1µF

0.1µF 0.01µF 1000pF

100pF

3pF 0

-3 -6

100 1k 10k 100k 1M 10M

3 6 9 12 15 18 A_V = 1

V+ = 2.5V V- = -2.5V

C_L RF

FET Probe V+

V−

(8)

Small Signal Pulse Response Test Circuit 4: AV = -1

TIME 10µs/div OUTPUT 50mV/di

v

INPUT 50mV/di

v AV^{= -1} V+ = 2.5V V- = -2.5V C_L = 2pF R_L = 5kΩ R_F = 20kΩ Small Signal Pulse Response

Test Circuit 4: AV = -1

v

INPUT 50mV/di

v

AV^{= -1} V+ = 1.35V V- = -1.35V C_L = 2pF R_L = 5kΩ R_F = 20kΩ

Small Signal Pulse Response Test Circuit 3: AV = 1

v

INPUT 50mV/di

v

AV^{= 1} V+ = 1.35V V- = -1.35V C_L = 2pF R_L = 1MΩ

v

INPUT 50mV/di

v

AV^{= 1} V+ = 2.5V V- = -2.5V C_L = 2pF R_L = 1MΩ

v

INPUT 50mV/di

v

AV^{= 1} V+ = 1.35V V- = -1.35V C_L = 50pF R_L = 1MΩ

TIME 250ms/div OUTPUT 50mV/di

v

INPUT 50mV/di

v

AV^{= 1} V+ = 2.5V V- = -2.5V C_L = 50pF R_L = 1MΩ

Functional Characteristics

(9)

v

INPUT 50mV/di

v AV^{= -1} V+ = 2.5V V- = -2.5V C_L = 2pF R_L = 1MΩ R_F = 20kΩ

Rail to Rail Output Operation

TIME 250µs/div OUTPUT 2V/div

INPUT 2V/di

v

AV^{= 2} V+ = 2.5V V- = -2.5V C_L = 2pF R_L = 1MΩ R_F = 20kΩ

∆V_PP = 5V

INPUT 2V/di

v

AV^{= 2} V+ = 2.5V V- = -2.5V C_L = 2pF R_L = 5kΩ RF = 20kΩ

∆V_PP = 5V Rail to Rail Output Operation

INPUT 2V/di

v

AV^{= 2} V+ = 1.35V V- = -1.35V C_L = 2pF R_L = 1MΩ RF = 20kΩ

∆V_PP = 2.7V

INPUT 1V/di

v

AV^{= 2} V+ = 1.35V V- = -1.35V C_L = 2pF R_L = 5kΩ R_F = 20kΩ

∆V_PP = 2.7V

TIME 10ms/div OUTPUT 50mV/di

v

INPUT 50mV/di

v AV^{= -1} V+ = 1.35V V- = -1.35V C_L = 2pF R_L = 1MΩ R_F = 20kΩ

(10)

Large Signal Pulse Response Test Circuit 3: AV = 1

v

A_V = 1 V+ = 1.35V V- = -1.35V C_L = 100pF R_L = 5kΩ

Positive Slew Rate = 0.14V/µs Negative Slew Rate = 0.22V/µs

Large Signal Pulse Response Test Circuit 3: AV = 1

v

A_V = 1 V+ = 2.5V V- = -2.5V C_L = 100pF R_L = 5kΩ

Positive Slew Rate = 0.13V/µs Negative Slew Rate = 0.18V/µs

(11)

Applications Information

Power Supply Bypassing

Regular supply bypassing techniques are recommended.

A 10µF capacitor in parallel with a 0.1µF capacitor on both the positive and negative supplies are ideal. For best performance all bypassing capacitors should be located as close to the op amp as possible and all capacitors should be low ESL (equivalent series inductance), ESR (equivalent series resistance). Surface-mount ceramic capacitors are ideal.

(12)

Package Information

SC70-5

MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com

This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use.

Micrel reserves the right to change circuitry and speciﬁcations at any time without notiﬁcation to the customer.

Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a signiﬁcant injury to the user. A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify

Micrel for any damages resulting from such use or sale.