NSC CLC426MDC, CLC426AWG-QML, CLC426AMC, CLC426AJE Datasheet

N	June 1999

CLC426

Wideband, Low-Noise, Voltage Feedback Op Amp

General Description

The CLC426 combines an enhanced voltage-feedback architecture with an advanced complementary bipolar process to provide a high-speed op amp with very low noise (1.6nV/√Hz & 2.0pA/√Hz) and distortion (-62/-68dBc 2nd/3rd harmonics at 1Vpp and 10MHz).

Providing a wide 230MHz gain-bandwidth product, a fast 400V/ s slew rate and very quick 16ns settling time to 0.05% , the CLC426 is the ideal choice for high speed applications requiring a very widedynamic range such as an input buffer for high-resolution analog-to- digital converters.

The CLC426 is internally compensated for gains ≥ 2V/V and can easily be externally compensated for unity-gain stability in applications suchaswidebandlow-noiseintegrators.TheCLC426isalsoequipped with external supply current adjustment which allows the user to optimize power, bandwidth, noise and distortion performance for each application.

The CLC426's combination of speed, low noise and distortion and low dc errors will allow high-speed signal conditioning applications to achieve the highest signal-to-noise performance. To reduce design times and assist board layout, the CLC426 is supported by an evaluationboardandSPICEsimulationmodelavailablefromNational.

For even higher gain-bandwidth voltage-feedback op amps see the 1.9GHz CLC425 (Av ≥ 10V/V) or the 5.0GHz CLC422 (Av ≥ 30V/V).

Features

■Wide gain-bandwidth product: 230MHz

■Ultra-low input voltage noise: 1.6nV/√Hz

■Very low harmonic distortion: -62/-68dBc

■Fast slew rate: 400V/ s

■Adjustable supply current

■Dual ±2.5 to ±5V or single 5 to 12V supplies

■Externally compensatable

Applications

■Active filters & integrators

■Ultrasound

■Low-power portable video

■ADC/DAC buffer

■Wide dynamic range amp

■Differential amps

■Pulse/RF amp

Typical Application

CLC426

Amp Op Feedback Voltage Noise,-Low Wideband,

	Pinout	NC	1		8	Rp (optional)
Wide Dynamic Range	DIP & SOIC	Vinv	2	-	7	+Vcc
Sallen-Key Band Pass Filter		Vnon-inv	3	+	6	Vout
2nd-Order
		-Vcc	4		5	Ext. Comp.
(20MHz, Q=10, G=2)
						(optional)

1999 National Semiconductor Corporation

http://www.national.com

Printed in the U.S.A.

CLC426 Electrical Characteristics (VCC = ±5V; AV = +2V/V; Rf =100Ω; RL = 100Ω; unless noted)

PARAMETERS		CONDITIONS			TYP			MIN/MAX RATINGS					UNITS		NOTES
Ambient Temperature		CLC426			+25°C		+25°C		0 to +70°C	-40 to +85°C
FREQUENCY DOMAIN RESPONSE
	gain bandwidth product	Vout < 0.5Vpp			230		170		120		100		MHz
	-3dB bandwidth, Av=+2	Vout < 0.5Vpp			130		90		70		55		MHz		1
		Vout < 5.0Vpp			50		25		22		20		MHz
	gain flatness	Vout < 0.5Vpp
	peaking	DC to 200MHz			0.6		1.5		2.2		2.5		dB
	rolloff	DC to 30MHz			0.0		0.6		1.0		1.0		dB
	linear phase deviation	DC to 30MHz			0.2		1.0		1.5		1.5		°
	TIME DOMAIN RESPONSE
	rise and fall time	1V step			2.3		3.5		5.0		6.5		ns
	settling time	2V step to 0.05%			16		20		24		24		ns
	overshoot	1V step			5		15		15		18		%
	slew rate	5V step			400		300		275		250		V/µs
	DISTORTION AND NOISE RESPONSE
	2nd harmonic distortion	1Vpp,10MHz			- 62		- 52		- 47	-	45		dBc
	3rd harmonic distortion	1Vpp,10MHz			- 68		- 58		- 54	-	54		dBc
	equivalent input noise	op amp only											nV/√Hz
	voltage	1MHz to 100MHz			1.6		2.0		2.3		2.6
	current	1MHz to 100MHz			2.0		3.0		3.6		4.6		pA/√Hz
	STATIC DC PERFORMANCE
	open-loop gain	DC			64		60		54		54		dB
	input offset voltage				1.0		2.0		2.8		2.8		mV		A
	average drift				3		---		10		10		µV/°C
	input bias current				5		25		40		65		µA		A
	average drift				90		---		600		700		nA/°C
	input offset current				0.3		3		5		5		µA		A
	average drift				5		---		25		50		nA/°C
	power-supply rejection ratio	DC			73		65		60		60		dB
	common-mode rejection ratio	DC	∞		70		62		57		57		dB
	supply current	pin #8 open, RL=			11		12		13		15		mA		A
MISCELLANEOUS PERFORMANCE													kΩ
	input resistance	common-mode			500		250		125		125
		differential-mode			750		200		50		25		kΩ
	input capacitance	common-mode			2.0		3.0		3.0		3.0		pF
		differential-mode			2.0		3.0		3.0		3.0		pF
	output resistance	closed loop			0.07		0.1		0.2		0.2		Ω
	output voltage range	RL= ∞			± 3.8		± 3.5		± 3.3	±	3.3		V
		RL=100Ω			± 3.5		± 3.2		± 2.6	±	1.3		V
	input voltage range	common mode			± 3.7		± 3.5		± 3.3	±	3.3		V
	output current				± 70		± 50		± 40	+	35, -20		mA

Min/max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are determined from tested parameters.

Absolute Maximum Ratings		Ordering Information

supply voltage	±7V
short circuit current	(note 2)
common-mode input voltage	±Vcc
differential input voltage	±10V
maximum junction temperature	+150°C
storage temperature	-65°C to+150°C
lead temperature (soldering 10 sec)	+300°C
ESD rating	2000V

Notes

A)J-level: spec is 100% tested at +25°C.

1)Minimum stable gain with out external compensation is +2 or -1V/V, the CLC426 is unity-gain stable with external compensation.

2)Output is short circuit protected to ground, however maximum reliability is obtained if output current does not exceed 160mA.

3)See text for compensation techniques.

Model			Temperature Range				Description
CLC426AJP				-40°C to +85°C			8-pin PDIP
CLC426AJE				-40°C to +85°C			8-pin SOIC
CLC426A8B				-55°C to +125°C			8-pin CerDIP, MIL-STD-883
	Package Thermal Resistance
	Package				θJC			θJA
	Plastic (AJP)				70°C/W			125°C/W
Surface Mount (AJE)					60°C/W			140°C/W
CerDIP					40°C/W			130°C/W
			Reliability Information
Transistor Count							52

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