Analog Devices AD843JR-16, AD843JN, AD843JCHIPS, AD843BQ, AD843BH Datasheet

a		34 MHz, CBFET
		Fast Settling Op Amp
		AD843

FEATURES

AC PERFORMANCE

Unity Gain Bandwidth: 34 MHz

Fast Settling: 135 ns to 0.01%

Slew Rate: 250 V/ms

Stable at Gains of 1 or Greater

Full Power Bandwidth: 3.9 MHz

DC PERFORMANCE

Input Offset Voltage: 1 mV max (AD843K/B} Input Bias Current: 0.6 nA typ

Input Voltage Noise: 19 nV/ÖHz

Open Loop Gain: 30 V/mV into a 500 V Load

Output Current: 50 mA min Supply Current: 13 mA max

Available in 8-Pin Plastic Mini-DIP & Cerdip, 16-Pin SOIC, 20-Pin LCC and 12-Pin Hermetic Metal Can Packages

Available in Tape and Reel in Accordance with EIA-481A Standard

Chips and MIL-STD-883B Parts Also Available

APPLICATIONS

High Speed Sample-and-Hold Amplifiers

High Bandwidth Active Filters

High Speed Integrators

High Frequency Signal Conditioning

PRODUCT DESCRIPTION

The AD843 is a fast settling, 34 MHz, CBFET input op amp. The AD843 combines the low (0.6 nA) input bias currents characteristic of a FET input amplifier while still providing a 34 MHz bandwidth and a 135 ns settling time (to within 0.01% of final value for a 10 volt step). The AD843 is a member of the Analog Devices’ family of wide bandwidth operational amplifiers. These devices are fabricated using Analog Devices’ 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.

The 250 V/μs slew rate and 0.6 nA input bias current of the AD843 ensure excellent performance in high speed sample-and- hold applications and in high speed integrators. This amplifier is also ideally suited for high bandwidth active filters and high frequency signal conditioning circuits.

Unlike many high frequency amplifiers, the AD843 requires no external compensation and it remains stable over its full operating temperature range. It is available in five performance grades: the AD843J and AD843K are rated over the commercial temperature range of 0°C to +70°C. The AD843A and AD843B are rated over the industrial temperature range of –40°C to +85°C. The AD843S is rated over the military temperature range of –55°C to +125°C and is available processed to MIL-STD-883B, Rev. C.

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Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

CONNECTION DIAGRAMS

16-Pin SOIC (R-16) Package	Plastic (N-8) and
	Cerdip (Q-8) Package

TO-8 (H-12A) Package

LCC (E-20A) Package

The AD843 is offered in either 8-pin plastic DIP or hermetic cerdip packages, in 16-pin SOIC, 20-Pin LCC, or in a 12-pin metal can. Chips are also available.

PRODUCT HIGHLIGHTS

1.The high slew rate, fast settling time and low input bias current of the AD843 make it the ideal amplifier for 12-bit D/A and A/D buffers, for high speed sample-and-hold amplifiers and for high speed integrator circuits. The AD843 can replace many FET input hybrid amplifiers such as the LH0032, LH4104 and OPA600.

2.Fully differential inputs provide outstanding performance in all standard high frequency op amp applications such as signal conditioning and active filters.

3.Laser wafer trimming reduces the input offset voltage to

1mV max (AD843K and AD843B).

4.Although external offset nulling is unnecessary in many applications, offset null pins are provided.

5.The AD843 does not require external compensation at closed loop gains of 1 or greater.

©Analog Devices, Inc., 1995

One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: [phone] Fax: [phone]

AD843–SPECIFICATIONS (@ TA = +25°C and ±15 V dc, unless otherwise noted)

				AD843J/A			AD843K/B			AD843S1
Model	Conditions		Min	Typ	Max	Min	Typ	Max	Min	Typ	Max	Units
INPUT OFFSET VOLTAGE1				1.0	2.0		0.5	1.0		1.0	2.0	mV
	TMIN-TMAX			1.7	4.0		1.2	2.0		3.0	4.5	mV
Offset Drift				12			12	35		12		mV/°C
INPUT BIAS CURRENT	Initial (TJ = +25°C)			50			40			50		pA
	Warmed-Up2			0.8	2.5		0.6	1.0		0.8	2.5	nA
	TMIN-TMAX				60/160			23/65			2600	nA
INPUT OFFSET CURRENT	Initial (TJ = +25°C)			30			20			30		pA
	Warmed-Up2			0.25	1.0		0.2	0.4		0.25	1.0	nA
	TMIN-TMAX				23/64			9/26			1025	nA
INPUT CHARACTERISTICS				1010			1010			1010		W
Input Resistance
Input Capacitance				6			6			6		pF
INPUT VOLTAGE RANGE			610			610			610
Common Mode				+12,			+12,			+12,		V
				–13			–13			–13
COMMON-MODE REJECTION	VCM = ±10 V		60	72		70	76		60	72		dB
	TMIN-TMAX		60	72		68	76		60	72		dB
INPUT VOLTAGE NOISE	f = 10 kHz			19			19			19		nV/Ö
													Hz
Wideband Noise	10 Hz to 10 MHz			60			60			60		mV rms
OPEN LOOP GAIN	VO = ±10 V
	RLOAD ³ 500 W		15	25		20	30		15	30		V/mV
	TMIN-TMAX		10	20		10	25		10	25		V/mV
OUTPUT CHARACTERISTICS	RLOAD ³ 500 W		610			610			610
Voltage				+11.5,			+11.5,			+11.5,		V
	VOUT = ±10 V		50	–12.6		50	–12.6		50	–12.6
Current												mA
Output Resistance	Open Loop			12			12			12		W
FREQUENCY RESPONSE
Unity Gain Bandwidth	VOUT = 90 mV p-p			34			34			34		MHz
Full Power Bandwidth3	VO	= 20 V p-p
	R1	³ 500 W	2.5	3.9		2.5	3.9		2.5	3.9		MHz
Rise Time	AVCL = –1			10			10			10		ns
Overshoot	AVCL = –1			15			15			15		%
Slew Rate	AVCL = –1		160	250		160	250		160	250		V/ms
Settling Time	10 V Step
	AVCL = –1
	to 0.1%			95			95			95		ns
	to 0.01%			135			135			135		ns
Overdrive Recovery	–Overdrive			200			200			200		ns
	+Overdrive			700			700			700		ns
Differential Gain	f = 4.4 MHz			0.025			0.025			0.025		%
Differential Phase	f = 4.4 MHz			0.025			0.025			0.025		Degree
POWER SUPPLY				± 15			±15			±15
Rated Performance			64.5		618	64.5		618	64.5		618	V
Operating Range												V
Quiescent Current				12	13		12	13		12	13	mA
	TMIN-TMAX			12.3	14		12.3	14		12.5	16	mA
Rejection Ratio	±5 V to ±18 V		65	76		70	80		65	76		dB
Rejection Ratio	TMIN-TMAX		62	76		68	80		62	76		dB
TEMPERATURE RANGE
Operating, Rated Performance
Commercial (0°C to +70°C)			AD843J				AD843K
Industrial (–40°C to +85°C)			AD843A				AD843B
Military (–55°C to +125°C)4										AD843S
PACKAGE OPTIONS
Plastic (N-8)			AD843JN			AD843KN
Cerdip (Q-8)			AD843AQ			AD843BQ			AD843SQ, AD843SQ/883B
Metal Can (H-12A)						AD843BH			AD843SH, AD843SH/883B
LCC (E-20A)									AD843SE/883B
SOIC (R-16)			AD843JR–16
Tape & Reel			AD843JR-16–REEL
			AD843JR-16–REEL7
Chips			AD843JCHIPS						AD843SCHIPS

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AD843

NOTES

1Standard Military Drawings Available: 5962-9098001M2A (SE/883B), 5962-9098001MXA (SH/883B), 5962-9098001MPA (SQ/883B). 2Specifications are guaranteed after 5 minutes at TA = +25°C.

3Full power bandwidth = Slew Rate/2 πV peak.

4All “S” grade TMIN-TMAX specifications are tested with automatic test equipment at TA = –55°C and TA = +125°C. Specifications subject to change without notice.

Specifications in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min and max specifications are guaranteed although only those shown in boldface are tested on all production units.

ABSOLUTE MAXIMUM RATINGS1	±18 V
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . .
Internal Power Dissipation2
Plastic Package . . . . . . . . . . . . . . . . . . . . . .	. . . . 1.50 Watts
Cerdip Package . . . . . . . . . . . . . . . . . . . . .	. . . . 1.35 Watts
12-Pin Header Package . . . . . . . . . . . . . . .	. . . . 1.80 Watts
16-Pin SOIC Package . . . . . . . . . . . . . . . .	. . . . 1.50 Watts
20-Pin LCC Package . . . . . . . . . . . . . . . . .	. . . . . 1.00 Watt
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . ±VS
Output Short Circuit Duration . . . . . . . . . . .	. . . . . Indefinite
Differential Input Voltage . . . . . . . . . . . . . . .	. . . +VS and –VS
Storage Temperature Range (N, R) . . . . . . .	–65°C to +125°C

Storage Temperature Range (Q, H, E) . . . . –65°C to +150°C

Operating Temperature Range	0°C to +70°C
AD843J/R . . . . . . . . . . . . . . . . . . . . . . . . .
AD843A/B . . . . . . . . . . . . . . . . . . . . . . . . .	–40°C to +85°C
AD843S . . . . . . . . . . . . . . . . . . . . . . . . . .	–55°C to +125°C
Lead Temperature Range (Soldering 60 sec) .	. . . . . . . +300°C
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . 500 V

NOTES

1Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device

reliability.

28-Pin Plastic Package: θJA = 100°C/Watt 8-Pin Cerdip Package: θJA = 110°C/Watt 12-Pin Header Package: θJA = 80°C/Watt 16-Pin SOIC Package: θJA = 100°C/Watt 20-Pin LCC Package: θJA = 150°C/Watt

METALIZATION PHOTOGRAPH

Contact factory for latest dimensions. Dimensions shown in inches and (mm).

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AD843–Typical Characteristics

Figure 1. Input Voltage Range vs. Supply Voltage

Figure 2. Output Voltage Swing vs. Supply Voltage

Figure 3. Output Voltage Swing vs. Load Resistance

Figure 4. Quiescent Current vs. Supply Voltage

Figure 5. Input Bias Current vs. Junction Temperature

Figure 6. Output Impedance vs. Frequency

Figure 7. Input Bias Current vs. Common Mode Voltage

Figure 8. Short Circuit Current Limit vs. Junction Temperature (TJ)

Figure 9. Gain Bandwidth Product vs. Temperature

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