AD8620AR-REEL ,Precision, Very Low Noise, Low Input Bias Current, Wide Bandwidth JFET Operational AmplifierAPPLICATIONS(R-8 Suffix)Photodiode AmplifierATEOUTA 1 8 VOUTBINAInstrumentation AD8620INA INBSe ..
AD8620BR ,Precision, Very Low Noise, Low Input Bias Current, Wide Bandwidth JFET Operational AmplifierCHARACTERISTICSOffset Voltage (AD8610B) V 45 100 µVOS–40°C < T < +125°C80 200 µVAOffset Voltage (AD ..
AD8620BR ,Precision, Very Low Noise, Low Input Bias Current, Wide Bandwidth JFET Operational AmplifierSPECIFICATIONS (@ V = 5.0 V, V = 0 V, T = 25C, unless otherwise noted.)S CM AParameter Symbol Con ..
AD8620BR-REEL ,Precision, Very Low Noise, Low Input Bias Current, Wide Bandwidth JFET Operational AmplifierFEATURES FUNCTIONAL BLOCK DIAGRAMSLow Noise 6 nV/√HzLow Offset Voltage: 100 V Max 8-Lead MSOP and ..
AD8625AR ,Precision Low Power Single-Supply JFET AmplifierApplications for the AD862x include photodiode transimpedance amplification, ATE reference level dr ..
AD8626AR ,Precision Low Power Single-Supply JFET AmplifierSpecifications table…………………………………………. .3 Changes to Figure 31……………………………...10 Changes to Figure 32… ..
ADS1224IPWR ,24-Bit Analog-to-Digital Converter with 4-Channel Differential Input MultiplexerMAXIMUM RATINGSInstruments recommends that all integrated circuits be(1)over operating free-air tem ..
ADS1224IPWT ,24-Bit Analog-to-Digital Converter with 4-Channel Differential Input MultiplexerSBAS286C − JUNE 2003 − REVISED JANUARY 2009 ..
ADS1224IPWT ,24-Bit Analog-to-Digital Converter with 4-Channel Differential Input MultiplexerFEATURES DESCRIPTION 240SPS Data Rate with 4MHz Clock The ADS1224 is a 4-channel, 24-bit, delta-si ..
ADS1224IPWTG4 ,24-bit, 240SPS ADC with 4-ch Diff Input Mux, High-Z Buffer, Serial Output 20-TSSOP -40 to 85SBAS286C − JUNE 2003 − REVISED JANUARY 2009(1)ORDERING INFORMATIONSPECIFIEDPACKAGE PACKAGE ORDERING ..
ADS1225 ,24-bit, 100SPS ADC with Differential Input and Internal OscillatorELECTRICAL CHARACTERISTICSAll specifications at T = –40°C to +105°C, AVDD = +5V, DVDD = +3V, and V ..
ADS1225IRGVRG4 ,24-bit, 100SPS ADC with Differential Input and Internal Oscillator 16-VQFN -40 to 105This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated cir ..
AD8610AR-REEL-AD8610AR-REEL7-AD8610ARZ-AD8610ARZ-REEL-AD8610BR-REEL-AD8610BRZ-AD8610BRZ-REEL-AD8620AR-REEL-AD8620BR-AD8620BR-REEL
Precision, Very Low Noise, Low Input Bias Current, Wide Bandwidth JFET Operational Amplifier
REV.D
Precision, Very Low Noise,
Low Input Bias Current, Wide Bandwidth
JFET Operational Amplifier
FUNCTIONAL BLOCK DIAGRAMS
8-Lead MSOP and SOIC
(RM-8 and R-8 Suffixes)
8-Lead SOIC
(R-8 Suffix)
FEATURES
Low Noise 6 nV/√Hz
Low Offset Voltage: 100 �V Max
Low Input Bias Current 10 pA Max
Fast Settling: 600 ns to 0.01%
Low Distortion
Unity Gain Stable
No Phase Reversal
Dual-Supply Operation: �5 V to �13 V
APPLICATIONS
Photodiode Amplifier
ATE
Instrumentation
Sensors and Controls
High Performance Filters
Fast Precision Integrators
High Performance Audio
GENERAL DESCRIPTIONThe AD8610/AD8620 is a very high precision JFET input amplifier
featuring ultralow offset voltage and drift, very low input voltage
and current noise, very low input bias current, and wide bandwidth.
Unlike many JFET amplifiers, the AD8610/AD8620 input bias
current is low over the entire operating temperature range. The
AD8610/AD8620 is stable with capacitive loads of over 1000 pF
in noninverting unity gain; much larger capacitive loads can be
driven easily at higher noise gains. The AD8610/AD8620 swings to
within 1.2 V of the supplies even with a 1 kΩ load, maximizing
dynamic range even with limited supply voltages. Outputs slew at
50 V/µs in either inverting or noninverting gain configurations, and
settle to 0.01% accuracy in less than 600 ns. Combined with the
high input impedance, great precision, and very high output drive, the
AD8610/AD8620 is an ideal amplifier for driving high performance
A/D inputs and buffering D/A converter outputs.
Applications for the AD8610/AD8620 include electronic instru-
ments; ATE amplification, buffering, and integrator circuits;
CAT/MRI/ultrasound medical instrumentation; instrumentation
quality photodiode amplification; fast precision filters (including
PLL filters); and high quality audio.
The AD8610/AD8620 is fully specified over the extended
industrial (–40°C to +125°C) temperature range. The AD8610
is available in the narrow 8-lead SOIC and the tiny MSOP8
surface-mount packages. The AD8620 is available in the narrow
8-lead SOIC package. MSOP8 packaged devices are available
only in tape and reel.
AD8610/AD8620–SPECIFICATIONSPOWER SUPPLY
NOISE PERFORMANCE
Specifications subject to change without notice.
(@ VS = �5.0 V, VCM = 0 V, TA = 25�C, unless otherwise noted.)
AD8610/AD8620
ELECTRICAL SPECIFICATIONS(@ VS = �13 V, VCM = 0 V, TA = 25�C, unless otherwise noted.)NOISE PERFORMANCE
Specifications subject to change without notice.
AD8610/AD8620
ORDERING GUIDE*Pb-free part
ABSOLUTE MAXIMUM RATINGS*Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27.3 V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS–– to VS+
Differential Input Voltage . . . . . . . . . . . . . . .± Supply Voltage
Output Short-Circuit Duration to GND . . . . . . . . . .Indefinite
Storage Temperature Range
R, RM Packages . . . . . . . . . . . . . . . . . . . . .–65°C to +150°C
Operating Temperature Range
AD8610/AD8620 . . . . . . . . . . . . . . . . . . . .–40°C to +125°C
Junction Temperature Range
R, RM Packages . . . . . . . . . . . . . . . . . . . . .–65°C to +150°C
Lead Temperature Range (Soldering, 10 sec) . . . . . . . . 300°C
*Stresses above those listed under Absolute Maximum Ratings may cause permanent
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.
*θJA is specified for worst-case conditions; i.e., θJA is specified for a device
soldered in circuit board for surface-mount packages.
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
AD8610/AD8620 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.
TPC 1.Input Offset Voltage at±13 V
TPC 4.Input Offset Voltage vs.
Temperature at±5 V (300 Amplifiers)
TPC 7.Supply Current vs.
Supply Voltage
TPC 2.Input Offset Voltage vs.
Temperature at±13 V (300 Amplifiers)
TPC 5.Input Offset Voltage Drift
TPC 8.Supply Current vs.
Temperature at±13 V
TPC 3.Input Offset Voltage at±5 V
TPC 6.Input Bias Current vs.
Common-Mode Voltage
TPC 9.Supply Current vs.
Temperature at±5 V
AD8610/AD8620TPC 10.Output Voltage to
Supply Rail vs. Load
TPC 13.Output Voltage High
vs. Temperature at±13 V
TPC 16.Closed-Loop Gain vs.
Frequency
TPC 11.Output Voltage High vs.
Temperature at±5 V
TPC 14.Output Voltage Low vs.
Temperature at±13 V
TPC 17.AVO vs. Temperature at±13 V
TPC 12.Output Voltage Low vs.
Temperature at±5 V
TPC 15.Open-Loop Gain
and Phase vs. Frequency
TPC 18.AVO vs. Temperature at±5 V
TPC 19.PSRR vs. Frequency at ±13 V
TPC 22.CMRR vs. Frequency
TPC 25.0.1 Hz to 10 Hz Input Voltage
Noise
TPC 21.PSRR vs. Temperature
TPC 24.Negative Overvoltage
Recovery
TPC 27.ZOUT vs. Frequency
TPC 20.PSRR vs. Frequency at ±5 V
TPC 23.Positive Overvoltage Recovery
TPC 26.Input Voltage Noise vs.
Frequency
AD8610/AD8620TPC 28.ZOUT vs. Frequency
TPC 31.Small Signal Overshoot vs.
Load Capacitance
TPC 34.+SR at G = +1
TPC 29.Input Bias Current vs.
Temperature
TPC 32.No Phase Reversal
TPC 35.–SR at G = +1
TPC 30.Small Signal Overshoot vs.
Load Capacitance
TPC 33.Large Signal Response at
G = +1
TPC 36.Large Signal Response at G = –1
TPC 37.+SR at G = –1
TPC 38.–SR at G = –1
Figure 1.Channel Separation Test Circuit
FUNCTIONAL DESCRIPTIONThe AD8610/AD8620 is manufactured on Analog Devices, Inc.’s
proprietary XFCB (eXtra Fast Complementary Bipolar) process.
XFCB is fully dielectrically isolated (DI) and used in conjunc-
tion with N-channel JFET technology and trimmable thin-film
resistors to create the world’s most precise JFET input amplifier.
Dielectrically isolated NPN and PNP transistors fabricated on
XFCB have FTgreater than 3 GHz. Low TC thin film resistors
enable very accurate offset voltage and offset voltage tempco
trimming. These process breakthroughs allowed Analog Devices’
world class ICdesigners to create an amplifier with faster slew
rate and more than 50% higher bandwidth at half of the current
consumed by its closest competition. The AD8610 is uncondi-
tionally stable in all gains, even with capacitive loads well in
excess of 1 nF. The AD8610B achieves less than 100 µV of offset
and 1 µV/°C of offset drift, numbers usually associated with very
high precision bipolar input amplifiers. The AD8610 is offered in
the tiny 8-lead MSOP as well as narrow 8-lead SOIC surface-
mount packages and is fully specified with supply voltages from
±5 V to ±13 V. The very wide specified temperature range, up to
125°C, guarantees superior operation in systems with little or no
active cooling.
The unique input architecture of the AD8610 features extremely
low input bias currents and very low input offset voltage. Low
power consumption minimizes the die temperature and maintains
the very low input bias current. Unlike many competitive JFET
amplifiers, the AD8610/AD8620 input bias currents are low even
at elevated temperatures. Typical bias currents are less than 200pA
at 85°C. The gate current of a JFET doubles every 10°C resulting
in a similar increase in input bias current over temperature.
Figure 2.AD8620 Channel Separation Graph
Power ConsumptionA major advantage of the AD8610/AD8620 in new designs is
the saving of power. Lower power consumption of the AD8610
makes it much more attractive for portable instrumentation and
for high-density systems, simplifying thermal management, and
reducing power supply performance requirements. Compare the
power consumption of the AD8610/AD8620 versus the OPA627
in Figure 3.
AD8610/AD8620
Driving Large Capacitive LoadsThe AD8610 has excellent capacitive load driving capability and
can safely drive up to 10 nF when operating with ±5 V supply.
Figures 4 and 5 compare the AD8610/AD8620 against the OPA627
in the noninverting gain configuration driving a 10 kΩ resistor and
10,000 pF capacitor placed in parallel on its output, with a square
wave input set to a frequency of 200 kHz. The AD8610 has much
less ringing than the OPA627 with heavy capacitive loads.
Figure 4.OPA627 Driving CL = 10,000 pF
Figure 5.AD8610/AD8620 Driving CL = 10,000 pF
The AD8610/AD8620 can drive much larger capacitances without
any external compensation. Although the AD8610/AD8620 is stable
with very large capacitive loads, remember that this capacitive
loading will limit the bandwidth of the amplifier. Heavy capacitive
loads will also increase the amount of overshoot and ringing at the
output. Figures 7 and 8 show the AD8610/AD8620 and the OPA627
in a noninverting gain of +2 driving 2 µF of capacitance load. The
ringing on the OPA627 is much larger in magnitude and continues
more than 10 times longer than the AD8610.
Figure 6.Capacitive Load Drive Test Circuit
Figure 7.OPA627 Capacitive Load Drive, AV = +2
Figure 8.AD8610/AD8620 Capacitive Load Drive, AV = +2
Slew Rate (Unity Gain Inverting vs. Noninverting)Amplifiers generally have a faster slew rate in an inverting unity
gain configuration due to the absence of the differential input
capacitance. Figures 9 through 12 show the performance of the
AD8610 configured in a gain of –1 compared to the OPA627.
The AD8610 slew rate is more symmetrical, and both the positive
and negative transitions are much cleaner than in the OPA627.
