AD820 ,Single Supply, Precision, Rail to Rail Low Power FET-Input Op AmpAPPLICATIONS3 V/µs slew rate are provided for a low supply current of 800 µA.Battery-Powered Precis ..
AD8200 ,High COmmon-Mode Voltage, Single Supply Difference AmplifierSpecifications subject to change without notice.–2– REV. AAD8200ABSOLUTE MAXIMUM RATINGS* PIN CONFI ..
AD8200YR , High Common-Mode Voltage, Single-Supply Difference Amplifier
AD8202YR ,High Common-Mode Voltage, Single-Supply Difference AmplifierGENERAL DESCRIPTION OUTPUTDIODE+IN NC +V OUTSThe AD8202 is a single-supply difference amplifier for ..
AD8202YRMZ ,High Common-Mode Voltage, Single-Supply Difference AmplifierSPECIFICATIONS—SINGLE SUPPLY TA = operating temperature range, VS = 5 V, unless otherwise noted. Ta ..
AD8205YR ,Single Supply 42V System Difference AmplifierGENERAL DESCRIPTION The AD8205 is a single-supply difference amplifier for amplify- Excellent dc pe ..
ADP1829ACPZ-R7 , Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking
ADP1877 ,Dual Output Synchronous Buck PWM ControllerFEATURES output voltage accuracy of ±0.85% from −40°C to +85°C and Input voltage range: 2.75 V to 1 ..
ADP1877ACPZ-R7 , Dual Output Synchronous Buck PWM Controller With Tracking
ADP1877ACPZ-R7 , Dual Output Synchronous Buck PWM Controller With Tracking
ADP190ACBZ-R7 , Logic Controlled, High-Side Power Switches
ADP195ACBZ-R7 , Logic Controlled, High-Side Power Switch with Reverse Current Blocking
AD820
Single Supply, Precision, Rail to Rail Low Power FET-Input Op Amp
REV.D
Single Supply, Rail to Rail
Low Power FET-Input Op Amp
FUNCTIONAL BLOCK DIAGRAMFEATURES
True Single Supply Operation
Output Swings Rail-to-Rail
Input Voltage Range Extends Below Ground
Single Supply Capability from 5 V to 36 V
Dual Supply Capability from �2.5 V to �18 V
Excellent Load Drive
Capacitive Load Drive Up to 350 pF
Minimum Output Current of 15 mA
Excellent AC Performance for Low Power
800 �A Max Quiescent Current
Unity Gain Bandwidth: 1.8 MHz
Slew Rate of 3.0 V/�s
Excellent DC Performance
800 �V Max Input Offset Voltage
1 �V/�C Typ Offset Voltage Drift
25 pA Max Input Bias Current
Low Noise
13 nV/√Hz @ 10 kHz
APPLICATIONS
Battery-Powered Precision Instrumentation
Photodiode Preamps
Active Filters
12- to 14-Bit Data Acquisition Systems
Medical Instrumentation
Low Power References and Regulators
PRODUCT DESCRIPTIONThe AD820 is a precision, low power FET input op amp that
can operate from a single supply of 5.0 V to 36 V, or dual sup-
plies of ±2.5 V to ±18 V. It has true single supply capability
with an input voltage range extending below the negative rail,
Figure 1.Typical Distribution of Input Bias Current
allowing the AD820 to accommodate input signals below ground
in the single supply mode. Output voltage swing extends to within
10 mV of each rail providing the maximum output dynamic range.
Offset voltage of 800 µV max, offset voltage drift of 1 µV/°C,
typical input bias currents below 25 pA and low input voltage noise
provide dc precision with source impedances up to a Gigaohm.
1.8 MHz unity gain bandwidth, –93 dB THD at 10 kHz and
3 V/µs slew rate are provided for a low supply current of 800 µA.
The AD820 drives up to 350 pF of direct capacitive load and
provides a minimum output current of 15 mA. This allows the
amplifier to handle a wide range of load conditions. This combi-
nation of ac and dc performance, plus the outstanding load drive
capability, results in an exceptionally versatile amplifier for the
single supply user.
The AD820 is available in two performance grades. The A and
B grades are rated over the industrial temperature range of
–40°C to +85°C.
The AD820 is offered in two varieties of 8-lead package: plastic
DIP, and surface mount (SOIC).
Figure 2.Gain of 2 Amplifier; VS = 5, 0,
VIN = 2.5V Sine Centered at 1.25 Volts
AD820–SPECIFICATIONS
(VS = 0, 5 V @ TA = 25�C, VCM = 0 V, VOUT = 0.2 V unless otherwise noted.)
AD820SPECIFICATIONS
(VS = 0, 5 V @ TA = 25�C, VCM = 0 V, VOUT = 0.2 V unless otherwise noted.)
AD820–SPECIFICATIONSNOISE/HARMONIC PERFORMANCE
DYNAMIC PERFORMANCE
OUTPUT CHARACTERISTICS
POWER SUPPLY
(VS = �15 V @ TA = 25�C, VCM = 0 V, VOUT = 0 V unless otherwise noted.)
CAUTIONESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the AD820 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.
NOTESThis is a functional specification. Amplifier bandwidth decreases when the input common-mode voltage is driven in the range (+VS – 1 V) to +VS.
Common-mode error voltage is typically less than 5 mV with the common-mode voltage set at 1 volt below the positive supply.VOL–VEE is defined as the difference between the lowest possible output voltage (VOL) and the minus voltage supply rail (VEE).
VCC–VOH is defined as the difference between the highest possible output voltage (VOH) and the positive supply voltage (VCC).
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS1Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±18 V
Internal Power Dissipation2
Plastic DIP (N) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.6 W
SOIC (R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.0 W
Input Voltage . . . . . . . . . . . . . .(+VS + 0.2 V) to – (20 V + VS)
Output Short Circuit Duration . . . . . . . . . . . . . . . .Indefinite
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . .±30 V
Storage Temperature Range (N) . . . . . . . . .–65°C to +125°C
Storage Temperature Range (R) . . . . . . . . .–65°C to +150°C
Operating Temperature Range
AD820A/B . . . . . . . . . . . . . . . . . . . . . . . . .–40°C to +85°C
Lead Temperature Range
(Soldering 60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . .260°C
NOTESStresses 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 indicated in the operational
section of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.8-Lead Plastic DIP Package: θJA = 90°C/W
8-Lead SOIC Package: θJA = 160°C/W
ORDERING GUIDEAD820BN*
AD820AR
*Not for new design, obsolete April 2002.
AD820TPC 1.Typical Distribution of Offset Voltage
(248 Units)
TPC 2.Typical Distribution of Offset Voltage
Drift (120 Units)
TPC 3.Typical Distribution of Input Bias
Current (213 Units)
TPC 4.Input Bias Current vs. Common-Mode
Voltage; VS = +5 V, 0 V and VS = ±5 V
TPC 5.Input Bias Current vs. Common-Mode
Voltage; VS = ±15 V
100k
10k
TEMPERATURE – �C
INPUT BIAS CURRENT – pA TPC 6.Input Bias Current vs. Temperature;
VS = 5 V, VCM = 0
–Typical Performance Characteristics
TPC 7.Open-Loop Gain vs. Load Resistance
TPC 8.Open-Loop Gain vs. Temperature
TPC 9.Input Error Voltage vs. Output Voltage
for Resistive Loads
OUTPUT VOLTAGE FROM VOLTAGE RAILS – mV
INPUT VOLTAGE – TPC 10.Input Error Voltage with Output Voltage
within 300 mV of Either Supply Rail for Various
Resistive Loads; VS = ±5 V
TPC 11.Input Voltage Noise vs. Frequency
TPC 12.Total Harmonic Distortion vs. Frequency
AD820TPC 13.Open-Loop Gain and Phase Margin
vs. Frequency
1001k10M1M100k10k
FREQUENCY – Hz
OUTPUT IMPEDANCE – TPC 14.Output Impedance vs. Frequency
TPC 15.Output Swing and Error vs. Settling Time
TPC 16.Common-Mode Rejection vs. Frequency
TPC 17.Absolute Common-Mode Error vs.
Common-Mode Voltage from Supply Rails
(VS – VCM)
TPC 18.Output Saturation Voltage vs. Load Current
