Build with LM2902B — Datasheet Specs & AI Design Help

00 — Overview

What the LM2902B does

The LM124, LM224, LM324, and LM2902 families are quadruple operational amplifiers available in commercial, industrial, and military temperature grades. These devices operate on a single supply of 3V to 36V, featuring a typical input offset voltage of 600µV, a gain bandwidth product of 1.3 MHz, and a quiescent current of 240µA per amplifier. The newer B versions reduce offset to 3mV maximum and lower current to 240µA. Engineers typically use these amplifiers in merchant network power supplies, multi-function printers, desktop PCs, air conditioners, and uninterruptible power supplies. The parts support high differential input voltages and include integrated EMI and RF filters for rugged applications.

Next step

Start building with LM2902B → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.

01 — Key specifications

Datasheet parameters

Datasheet parameters for LM2902B
Parameter	Min	Typ	Max	Conditions	Source
output current	—	-30 mA	—	Source, V_S = 15\text{V}, V_O = V_-, VID = 1\text{V}; i; OUTPUT	TI datasheet, p. 10 — 6.6 Electrical Characteristics for LM2902B and LM2902BA (continued)
supply voltage range	3 V	—	36 V	(kv, kav); 4 Related Products	TI datasheet, p. 2 — 4 Related Products
input offset voltage drift	—	7 µV/°C	—	RS = 0Ω, TA = -40°C to +125°C; OFFSET VOLTAGE	TI datasheet, p. 9 — 6.6 Electrical Characteristics for LM2902B and LM2902BA
gain bandwidth	—	1.2 MHz	—	R_L = 1M\Omega, C_L = 20pF(see Figure 7-1); 6.10 Operating Conditions	TI datasheet, p. 13 — 6.10 Operating Conditions
cmrr	70 dB	80 dB	—	VS = 3V to 36V, (V-) ≤ VCM≤ (V+) - 1.5V; cmrr; INPUT VOLTAGE RANGE	TI datasheet, p. 9 — 6.6 Electrical Characteristics for LM2902B and LM2902BA
operating temperature	-40 °C	—	125 °C	LM2902xxx, LM2902Bx; ta; over operating free-air temperature range (unless otherwise noted)	TI datasheet, p. 6 — over operating free-air temperature range (unless otherwise noted)
input offset current	—	500 pA	4 nA	ios; INPUT BIAS CURRENT	TI datasheet, p. 9 — 6.6 Electrical Characteristics for LM2902B and LM2902BA
input bias current	—	—	-60 nA	TA = -40°C to +125°C; ib; INPUT BIAS CURRENT	TI datasheet, p. 9 — 6.6 Electrical Characteristics for LM2902B and LM2902BA
slew rate	—	0.5 V/µs	—	RL = 1MΩ, CL = 30pF, VI = ±10V (seeFigure 6-1for test circuit); FREQUENCY RESPONSE	TI datasheet, p. 9 — 6.6 Electrical Characteristics for LM2902B and LM2902BA
psrr	65 dB	100 dB	—	psrr; OFFSET VOLTAGE	TI datasheet, p. 9 — 6.6 Electrical Characteristics for LM2902B and LM2902BA
input voltage noise density	—	35 nV/√Hz	—	RS = 100Ω, VI = 0V, f = 1kHz (seeFigure 6-2for test circuit); en; NOISE	TI datasheet, p. 9 — 6.6 Electrical Characteristics for LM2902B and LM2902BA
settling time	—	4 µs	—	To 0.1%, VS = 5V, 2V step, G = +1, CL = 100pF; ts; FREQUENCY RESPONSE	TI datasheet, p. 9 — 6.6 Electrical Characteristics for LM2902B and LM2902BA
channel count	—	4	—		TI datasheet, p. 1

02 — Alternatives

Closest matches to LM2902B

LM321A 8.3× lower input offset current, 2.0× higher input voltage noise density, 1.5× higher cmrr

LM124 4.0× higher input offset current, 1.2× lower slew rate, 1.2× lower operating temperature

LM158 4.0× higher input offset current, 1.7× lower slew rate, 1.2× lower operating temperature

LM258 4.0× higher input offset current, 1.7× lower slew rate, 1.3× lower operating temperature

LM258A 4.0× higher input offset current, 1.7× lower slew rate, 1.3× lower operating temperature

LM2904 4.0× higher input offset current, 1.6× higher input voltage noise density, 1.2× higher slew rate

LM358B 2.0× lower input offset voltage drift, 1.9× lower operating temperature, 1.1× higher input voltage noise density

LMV358 10.0× higher input offset current, 4.8× lower supply voltage range, 3.5× lower input offset voltage drift

03 — FAQ

Frequently asked questions

How many channels does the LM2902B have?

The LM2902B has 4 channels.

What is the CMRR of the LM2902B when VS = 3V to 36V and (V-) ≤ VCM≤ (V+) - 1.5V?

The CMRR is 80 dB.

What is the gain bandwidth of the LM2902B?

The gain bandwidth is 1.2 MHz when R_L = 1M\Omega and C_L = 20pF (see Figure 7-1) under 6.10 Operating Conditions.

What is the input bias current (ib) for the LM2902B at TA = -40°C to +125°C?

The input bias current is -60 nA.

What is the input offset current (ios) under the condition of input bias current?

The input offset current (ios) is 500 pA.

What is the input offset voltage drift for the LM2902B when RS = 0Ω and TA = -40°C to +125°C?

The input offset voltage drift is 7 µV/°C.

What is the input voltage noise density when RS = 100Ω, VI = 0V, and f = 1kHz?

The input voltage noise density is 35 nV/√Hz.

What is the operating temperature for the LM2902B?

The operating temperature is 125 °C for the LM2902xxx, LM2902Bx; ta; over operating free-air temperature range (unless otherwise noted).

What is the output current when sourcing with V_S = 15V, V_O = V_-, and VID = 1V?

The output current is -30 mA.

What is the PSRR value for the OFFSET VOLTAGE?

The PSRR value for the OFFSET VOLTAGE is 100 dB.

What is the settling time to 0.1% for the LM2902B?

The settling time is 4 µs at VS = 5V, 2V step, G = +1, CL = 100pF.

What is the slew rate of the LM2902B under the condition of RL = 1MΩ, CL = 30pF, and VI = ±10V?

The slew rate is 0.5 V/µs.