MAX4122, MAX4123, MAX4124, MAX4125, MAX4126, MAX4127, MAX4128, MAX4129 Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op Amps

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The MAX4122–MAX4129 family of operational amplifiers combines wide bandwidth and excellent DC accuracy with rail-to-rail operation at the inputs and outputs. These devices require only 650µA per amplifier, and operate from either a single supply (+2.7V to +6.5V) or dual supplies (±1.35V to ±3.25V) with a common-mode voltage range that extends 250mV beyond V_EE and V_CC. They are capable of driving 250

loads. The MAX4122/MAX4123/MAX4126/MAX4127/MAX4129 have a 5MHz gain bandwidth product, while the decompensated MAX4124/MAX4125/MAX4128 (stable at closed-looped gains of 10 or greater) have a 25MHz gain bandwidth product. In addition, the MAX4123/MAX4125/MAX4127 feature a shutdown mode in which the outputs are placed in a high-impedance state and the supply current is reduced to only 25µA per amplifier.

With their rail-to-rail input common-mode range and output swing, these amplifiers are ideal for low-voltage single-supply operation. Although the minimum operating voltage is specified at 2.7V, the devices typically operate down to 1.8V. In addition, low offset voltage and high speed make them the ideal signal-conditioning stages for precision, low-voltage, data-acquisition systems. The MAX4122 and MAX4124 come in the space-saving 5-pin SOT23-5 package.

Key Features

Applications/Uses

5-Pin SOT23 Package (MAX4122/4)
+2.7V to +6.5V Single-Supply Operation
Rail-to-Rail Input Common-Mode Voltage Range
Rail-to-Rail Output Voltage Swing
5MHz Gain-Bandwidth Product (MAX4122/3/6/7/9)
25MHz Gain-Bandwidth Product (MAX4124/5/8)
650µA Quiescent Current per Amplifier
25µA Shutdown Function (MAX4123/5/7)
200µV Offset Voltage
No Phase Reversal for Overdriven Inputs
Drive 250Ω Loads
Stable with 500pF Capacitive Loads
Unity-Gain Stable (MAX4122/3/6/7/9)
Stable at Gains > 10V/V (MAX4124/5/8)

	Battery-Powered Applications
	Data Acquisition
	Low-Power, Low-Voltage Applications
	Portable Equipment
	Signal Conditioning

Key Specifications: Operational Amplifiers
Part Number	Amps Per Pkg.	Rail to Rail	Min. Stable Closed Loop Gain (V/V)	Min. Total Supply (V)	Max. Total Supply (V)	Typ. Supply Current per Amp. (µA)	Max. Supply Current per Amp. (µA)	Max. V_OS (µV)	Typ. CMRR @ DC (dB)	Typ PSRR @ DC (dB)	Max. Input I_BIAS (nA)	Typ. Unity Gain BW (MHz)	Typ. Slew Rate (V/µs)	Input Voltage Noise Density (nV/√Hz)	Input Current Noise Density (pA/√Hz)	Low Power Shutdown	Package	Price^**
MAX4122	1	Input and Output	1	2.7	6.5	725	825	1,500	90	100	150	5	2	22	0.4	No	SOT-23/5	$0.85 @ 1k
MAX4123	1		1					600	98			5	2				SOIC/8 uMAX/8	$0.98 @ 1k
MAX4124	1		10					1,500	90			25	10				SOT-23/5	$0.85 @ 1k
MAX4125	1		10					600	98			25	10				SOIC/8 uMAX/8	$0.98 @ 1k
MAX4126	2		1					750	94			5	2				SOIC/8 uMAX/8	$1.40 @ 1k
MAX4127	2		1					750	94			5	2				SOIC/14	$1.67 @ 1k
MAX4128	2		10					750	94			25	10				SOIC/8 uMAX/8	$1.40 @ 1k
MAX4129	4		1					1,500	84			5	2				SOIC/14	$2.40 @ 1k
See All Operational Amplifiers (137)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.