Analog Devices AD8515 Service Manual

1.8 V Low Power CMOS Rail-to-Rail

FEATURES Single-Supply Operation: 1.8 V to 5 V Offset Voltage: 6 mV Max Space-Saving SOT-23 and SC70 Packages Slew Rate: 2.7 V/␮s Bandwidth: 5 MHz Rail-to-Rail Input and Output Swing Low Input Bias Current: 2 pA Typ Low Supply Current @ 1.8 V: 450 ␮A Max

APPLICATIONS Portable Communications Portable Phones Sensor Interfaces Laser Scanners PCMCIA Cards Battery-Powered Devices New Generation Phones Personal Digital Assistants

GENERAL DESCRIPTION

The AD8515 is a rail-to-rail amplifier that can operate from a single-supply voltage as low as 1.8 V.

The AD8515 single amplifier, available in SOT-23-5L and SC70-5L packages, is small enough to be placed next to sensors, reducing external noise pickup.

The AD8515 is a rail-to-rail input and output amplifier with a gain bandwidth of 5 MHz and typical offset voltage of 1 mV from a 1.8 V supply. The low supply current makes these parts ideal for battery-powered applications. The 2.7 V/µs slew rate makes the AD8515 a good match for driving ASIC inputs, such as voice codecs.

The AD8515 is specified over the extended industrial temperature range (–40°C to +125°C).

Input/Output Operational Amplifier

AD8515

PIN CONFIGURATION

5-Lead SC70 and SOT-23

(KS and RT Suffixes)

OUT

+IN

V–

AD8515

V+

ⴚIN

REV. C

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AD8515–SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

(VS = 1.8 V, VCM = VS/2, TA = 25ⴗC, unless otherwise noted.)

Parameter Symbol Condition Min Typ Max Unit

INPUT CHARACTERISTICS

Offset Voltage V

Input Bias Current I

Input Offset Current I

VCM = VS/2 16mV –40°C < T

< +125°C8mV

VS = 1.8 V 2 30 pA –40°C < T –40°C < T

< +85°C 600 pA

< +125°C8nA

110pA

–40°C < T

< +125°C 500 pA

Input Voltage Range 0 1.8 V Common-Mode Rejection Ratio CMRR 0 V ≤ V

–40°C < T

Large Signal Voltage Gain A

RL = 100 kΩ, 0.3 V ≤ V

≤ 1.8 V 50 dB

< +125°C47 dB

≤ 1.5 V 110 400 V/mV

OUT

Offset Voltage Drift ∆VOS/∆T4µV/°C

OUTPUT CHARACTERISTICS

Output Voltage High V

Output Voltage Low V

Short Circuit Limit I

IL = 100 µA, –40°C < TA < +125°C 1.79 V

= 750 µA, –40°C < TA < +125°C 1.77 V

IL = 100 µA, –40°C < TA < +125°C10mV I

= 750 µA, –40°C < TA < +125°C30mV

20 mA

POWER SUPPLY

Supply Current/Amplifier I

= VS/2 300 450 µA

OUT

–40°C < TA < +125°C 500 µA

DYNAMIC PERFORMANCE

Slew Rate SR RL = 10 kΩ 2.7 V/µs Gain Bandwidth Product GBP 5 MHz

NOISE PERFORMANCE

Voltage Noise Density e

f = 1 kHz 22 nV/√Hz f = 10 kHz 20 nV/√Hz

Current Noise Density i

Specifications subject to change without notice.

f = 1 kHz 0.05 pA/√Hz

REV. C–2–

AD8515

ELECTRICAL CHARACTERISTICS

(VS = 3.0 V, VCM = VS/2, TA = 25ⴗC, unless otherwise noted.)

Parameter Symbol Condition Min Typ Max Unit

INPUT CHARACTERISTICS

Offset Voltage V

Input Bias Current I

Input Offset Current I

VCM =VS/2 16mV –40°C < T

< +125°C8mV

VS = 3.0 V 2 30 pA –40°C < T –40°C < T

< +85°C 600 pA

< +125°C8nA

110pA

–40°C < T

< +125°C 500 pA

Input Voltage Range 0 3 V Common-Mode Rejection Ratio CMRR 0 V ≤ V

–40°C < T

Large Signal Voltage Gain A

RL = 100 kΩ, 0.3 V ≤ V

≤ 3.0 V 54 dB

< +125°C50 dB

≤ 2.7 V 250 1,000 V/mV

OUT

Offset Voltage Drift ∆VOS/∆T4µV/°C

OUTPUT CHARACTERISTICS

Output Voltage High V

Output Voltage Low V

IL = 100 µA, –40°C < TA < +125°C 2.99 V

= 750 µA, –40°C < TA < +125°C 2.98 V

IL = 100 µA, –40°C < TA < +125°C10mV IL = 750 µA, –40°C < TA < +125°C20mV

POWER SUPPLY

Power Supply Rejection Ratio PSRR VS = 1.8 V to 5.0 V 65 85 dB

< +125°C5780dB

= VS/2 300 450 µA

Supply Current/Amplifier I

–40°C < T V

OUT

–40°C < TA < +125°C 500 µA

DYNAMIC PERFORMANCE

Slew Rate SR R

= 10 kΩ 2.7 V/µs

Gain Bandwidth Product GBP 5 MHz

NOISE PERFORMANCE

Voltage Noise Density e

f = 1 kHz 22 nV/√Hz f = 10 kHz 20 nV/√Hz

Current Noise Density i

Specifications subject to change without notice.

f = 1 kHz 0.05 pA/√Hz

REV. C

–3–

AD8515

ELECTRICAL CHARACTERISTICS

(VS = 5.0 V, VCM = VS/2, TA = 25ⴗC, unless otherwise noted.)

Parameter Symbol Condition Min Typ Max Unit

INPUT CHARACTERISTICS

Offset Voltage V

Input Bias Current I

Input Offset Current I

VCM =VS/2 16mV –40°C < T

< +125°C8mV

VS = 5.0 V 5 30 pA –40°C < T –40°C < T

< +85°C 600 pA

< +125°C8nA

110pA

–40°C < T

< +125°C 500 pA

Input Voltage Range 0 5.0 V Common-Mode Rejection Ratio CMRR 0 V ≤ V

–40°C < T

Large Signal Voltage Gain A

RL = 100 kΩ, 0.3 V ≤ V

≤ 5.0 V 60 75 dB

< +125°C54 dB

≤ 4.7 V 500 2,000 V/mV

OUT

Offset Voltage Drift ∆VOS/∆T4µV/°C

OUTPUT CHARACTERISTICS

Output Voltage High V

Output Voltage Low V

IL = 100 µA, –40°C < TA < +125°C 4.99 V

= 750 µA, –40°C < TA < +125°C 4.98 V

IL = 100 µA, –40°C < TA < +125°C10mV IL = 750 µA, –40°C < TA < +125°C20mV

POWER SUPPLY

Power Supply Rejection Ratio PSRR VS = 1.8 V to 5.0 V 65 82 dB

< +125°C5780dB

= VS/2 350 500 µA

Supply Current/Amplifier I

–40°C < T V

OUT

–40°C < TA < +125°C 600 µA

DYNAMIC PERFORMANCE

Slew Rate SR R

= 10 kΩ 2.7 V/µs

Gain Bandwidth Product GBP 5 MHz

NOISE PERFORMANCE

Voltage Noise Density e

f = 1 kHz 22 nV/√Hz f = 10 kHz 20 nV/√Hz

Current Noise Density i

Specifications subject to change without notice.

f = 1 kHz 0.05 pA/√Hz

REV. C–4–

AD8515

ABSOLUTE MAXIMUM RATINGS*

(TA = 25°C, unless otherwise noted.)

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND to V

Differential Input Voltage . . . . . . . . . . . . . . . . . . ±6 V or ±V

Output Short-Circuit Duration

to GND . . . . . . . . . . . . . . . . . . . . Observe Derating Curves

Package Type ␪JA* ␪

5-Lead SOT-23 (RT) 230 146 °C/W

5-Lead SC70 (KS) 376 126 °C/W

*θJA is specified for worst-case conditions, i.e., θ

dered in circuit board for surface-mount packages.

Storage Temperature Range

KS and RT Packages . . . . . . . . . . . . . . . . –65°C to +150°C

Operating Temperature Range

AD8515 . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +125°C

Junction Temperature Range

KS and RT Packages . . . . . . . . . . . . . . . . –65°C to +150°C

Lead Temperature Range (Soldering, 60 sec) . . . . . . . . 300°C

*Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ORDERING GUIDE

Model Temperature Range Package Description Package Option Branding

AD8515ART-R2 –40ºC to +125ºC 5-Lead SOT-23 RT-5 BDA AD8515ART-REEL –40ºC to +125ºC 5-Lead SOT-23 RT-5 BDA AD8515ART-REEL7 –40ºC to +125ºC 5-Lead SOT-23 RT-5 BDA AD8515ARTZ-R2* –40ºC to +125ºC 5-Lead SOT-23 RT-5 AOH AD8515ARTZ-REEL* –40ºC to +125ºC 5-Lead SOT-23 RT-5 AOH AD8515ARTZ-REEL7* –40ºC to +125ºC 5-Lead SOT-23 RT-5 AOH AD8515AKS-R2 –40ºC to +125ºC 5-Lead SC70 KS-5 BDA AD8515AKS-REEL –40ºC to +125ºC 5-Lead SC70 KS-5 BDA AD8515AKS-REEL7 –40ºC to +125ºC 5-Lead SC70 KS-5 BDA AD8515AKSZ-R2* –40ºC to +125ºC 5-Lead SC70 KS-5 AOH AD8515AKSZ-REEL* –40ºC to +125ºC 5-Lead SC70 KS-5 AOH AD8515AKSZ-REEL7* –40ºC to +125ºC 5-Lead SC70 KS-5 AOH

*Z = Pb-free part.

is specified for device sol-

Unit

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD8515 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.

REV. C

–5–

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