AD842 Wideband, High Output Current, Fast Settling Op Amp

The AD842 is a member of the Analog Devices, Inc. family of wide bandwidth operational amplifiers. This device is fabricated using the Analog Device junction isolated complementary bipolar (CB) process. This process permits a combination of dc precision and wideband ac performance previously unobtainable in a monolithic op amp. In addition to its 80 MHz gain bandwidth product, the AD842 offers extremely fast settling characteristics, typically settling to within 0.01% of final value in less than 100 ns for a 10 V step.

The AD842 also offers a low quiescent current of 13 mA, a high output current drive capability (100 mA minimum), a low input voltage noise of 9 nV√Hz, and a low input offset voltage (1.5 mV maximum).

The 375 V/μs slew rate of the AD842, along with its 80 MHz gain bandwidth product, ensures excellent performance in video and pulse amplifier applications. This amplifier is ideally suited for use in high frequency signal conditioning circuits and wide bandwidth active filters. The extremely rapid settling time of the AD842 makes this amplifier the preferred choice for data acquisition applications requiring 12-bit accuracy. The AD842 is also appropriate for other applications, such as high speed DAC and ADC buffer amplifiers and other wide bandwidth circuitry.

Features and Benefits

Gain Bandwidth Product: 80 MHz (Gain = 2)

Fast Settling: 100 ns to 0.01% for a 10 V Step

Slew Rate: 375 V/µs

Stable at Gains of 2 or Greater

Full Power Bandwidth: 6.0 MHz for 20 V p-p

Input Offset Voltage: 1.5 mV max

Input Offset Drift: 14 µV/°C

Input Voltage Noise: 9 nV/√Hz typ

Open-Loop Gain: 90 V/mV into a 499 Ω Load

Output Current: 100 mA min

Quiescent Supply Current: 14 mA max

Amplifiers

Data Sheets

Document	note
AD842: Wideband, High Output Current Fast Settling Op Amp Data Sheet (Rev. F)	PDF 475 kB
AD842: Military Data Sheet

Application Notes

Document	note
AN-402: Replacing Output Clamping Op Amps with Input Clamping Amps	PDF 55 kB
AN-581: Biasing and Decoupling Op Amps in Single Supply Applications (Rev. 0)	PDF 166 kB
AN-417: Fast Rail-to-Rail Operational Amplifiers Ease Design Constraints in Low Voltage High Speed Systems	PDF 228 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD842JNZ Production	14 ld PDIP	OTH 25	0 to 70C	7.45	6.33	Y
AD842JRZ-16 Production	16 ld SOIC - Wide	OTH 47	0 to 70C	5.7	4.85	Y
AD842KNZ Production	14 ld PDIP	OTH 25	0 to 70C	8.49	7.21	Y
AD842SCHIPS Production	CHIPS OR DIE	REEL 100	25C	29.36	26.69	Y
AD842SE/883B Production	LCC:CER LEADLESS CHIP CARR	OTH 54	-55 to 125C	86.3	77.69	N
AD842SQ Production	14 ld CerDIP	OTH 25	-55 to 125C	26.05	26.05	N
AD842SQ/883B Production	14 ld CerDIP	OTH 25	-55 to 125C	47.43	42.67	N