Parts · ICs

CA3260

Dual MOSFET-Input Op-Amp DIP-8 / SOIC-8.8 circuits use this part. Listed as: Dual op-amp, DIP8; Operational amplifier, DIP8.

Datasheet · from renesas.com

Substitutes same socket

Parts that fit the same socket: the same function, pin count and pinout. The figures are read off each part's datasheet (this one's from page 2), typical where the sheet gives a typical value, otherwise the maximum. Closest first; the last column says what differs. A different part can change the sound, and a circuit may lean on one particular figure, so read the build document's notes before you swap.

This part

Part	Input	Supply	GBW	Slew	Noise	Iq	Boards
CA3260	mosfet, RR out	4–16 V	4 MHz	10 V/µs		4.5 mA	8

CMOS output swings to both rails, but the 16 V supply limit rules out 18 V pedals.

Fits the same socket

Part	Input	Supply	GBW	Slew	Noise	Iq	Boards	Differs
CA3240EZ	mosfet	4–36 V	4.5 MHz	9 V/µs	40 nV	4 mA	10	Dual CA3140: MOSFET inputs that reach 0.5 V below the negative rail, but about 4 mA per amplifier.
LF353	JFET	7–36 V	3 MHz	13 V/µs	18 nV	1.8 mA	73	JFET input. JFET dual; common-mode range must stay 4 V inside each rail.
TL072	JFET	4.5–40 V	5.25 MHz	20 V/µs	37 nV	1.4 mA	1338	JFET input. JFET input; inputs must stay 4 V above the negative rail, and the input range reaches the positive rail.
TL082	JFET	4.5–40 V	5.25 MHz	20 V/µs	37 nV	1.4 mA	72	JFET input. JFET input; inputs must stay 4 V above the negative rail, and the input range reaches the positive rail.
OPA2134	JFET	5–36 V	8 MHz	20 V/µs	8 nV	4 mA	108	JFET input. FET-input audio op-amp without phase inversion; draws about 4 mA per amplifier, so it is hungry on a 9 V battery.
TLC272	CMOS	3–16 V	4.5 MHz	21 V/µs	10.8 nV	0.56 mA	7	CMOS input. CMOS dual limited to 16 V total; the input range includes the negative rail.
LF412	JFET	7–36 V	4.5 MHz	21 V/µs	18 nV	0.56 mA	4	JFET input. FET-input dual with standard pinout per the drawing (the 2026 pin table misprints pins 4 to 8).
TLC2272	CMOS, RR out	4.4–16 V	2.25 MHz	3.6 V/µs	9 nV	1.2 mA	20	CMOS input. CMOS rail-to-rail-output dual limited to 16 V total; do not run it on an 18 V rail.
OPA1678	RR out	4.5–36 V	16 MHz	9 V/µs	4.5 nV	2 mA	6	Surface-mount only (SOIC-8 and smaller), so a DIP socket needs an adapter; standard dual pinout.
UPC4570	bipolar	8–32 V	15 MHz	7 V/µs		2.5 mA	5	bipolar input. Low-noise, wideband audio dual; needs at least ±4 V (8 V) supply.

Circuit	Based on	Category	Vendor	Box	Knobs	Price	BOM
Quantum MOSFET Distortion 2N5088 · CA3260 · CA3260E Ibanez MT10 Mostortion · 125B	Ibanez MT10 Mostortion	Distortion	Aion FX	125B	2	$12.50	65
Quantum (Legacy) 2N5088 · CA3260 Ibanez MT10 Mostortion · 1590B	Ibanez MT10 Mostortion	Distortion	Aion FX	1590B	5	—	50
Ibanez MT-10 Mostortion Vero21×15 Verified 2N5088 · CA3260 Ibanez MT10 Mostortion	Ibanez MT10 Mostortion	Distortion	Dirtbox Layouts	—	5	—	35
Ibanez MT10 Mostortion Perfboard Verified ? · CA3260 · CA3260E Ibanez MT10 Mostortion · 1590B	Ibanez MT10 Mostortion	Distortion	Effects Layouts (blog)	1590B	5	—	35
Misfit CA3260 · CA3260E · SI Ibanez MT10 Mostortion · 1590B	Ibanez MT10 Mostortion	Distortion	Madbean	1590B	5	—	52
Mosfet Monster 2N5088 · CA3260 · CA3260EZ Ibanez MT10 Mostortion · 125B	Ibanez MT10 Mostortion	Distortion	PCB Guitar Mania	125B	4	€9.90 out	53
Oxide Distortion 2SC1815 · CA3260 Ibanez MT10 Mostortion · 125B	Ibanez MT10 Mostortion	Fuzz	PedalPCB	125B	5	$12.00	52
Ibanez MT10 Mostortion Vero Verified CA3260 Ibanez MT10 Mostortion	Ibanez MT10 Mostortion	Distortion	Tagboard Effects	—	5	—	25