Basic Product Information
Part Number: LM7321MA
Core Electrical Parameters
| Parameter |
Value |
Unit |
| Number of Channels |
1 |
– |
| Supply Voltage Range |
2.5 to 32 (±1.25 to ±16) |
V |
| Gain Bandwidth Product (GBW) |
20 |
MHz |
| Slew Rate |
18 |
V/μs |
| Input Offset Voltage (max, 25°C) |
6 |
mV |
| Offset Drift (typ) |
2 |
μV/°C |
| Supply Current per Channel (typ) |
1.1 |
mA |
| Output Current (source/sink) |
+65 / -100 |
mA |
| Input Voltage Noise (1kHz) |
15 |
nV/√Hz |
| Input Current Noise (1kHz) |
1.3 |
pA/√Hz |
| CMRR (typ) |
80 |
dB |
| Input Common-Mode Range |
Rail-to-rail + 0.3V beyond rails |
V |
| Output Swing Headroom (to rail) |
+60mV (neg) / -150mV (pos) |
mV |
| Capacitive Load Tolerance |
Unlimited |
– |
| THD+N |
-86 |
dB |
| Architecture |
Bipolar |
– |
| Operating Temperature |
-40 to +125 |
°C |
| Package Size |
4.9 x 3.91 |
mm |
Core Features & Advantages
The LM7321MA delivers a unique combination of high speed (20MHz GBW), high output drive (±65mA), and unlimited capacitive load tolerance in a rail-to-rail I/O amplifier, qualified to AEC-Q100 Grade 1 for automotive applications.
- Primary Function: Single-channel rail-to-rail input/output operational amplifier with high output current, wide supply range, and unconditional capacitive load stability for driving heavy loads.
- Advantages:
- Unlimited capacitive load drive — guaranteed oscillation-free operation into any capacitive load, eliminating the need for isolation resistors or compensation networks on PCB layouts.
- High output current (+65mA/-100mA) — drives MOSFET gates, power transistors, analog optocouplers, and long cables directly without external buffer stages.
- AEC-Q100 Grade 1 qualified — fully specified and tested from -40°C to +125°C at 2.7V, ±5V, and ±15V supply, ensuring reliable performance in automotive under-hood environments.
Typical Application Scenarios
- Industry: Automotive / Industrial / Communications
- Equipment: Motor drive circuits, capacitive proximity sensors, high-side current monitors, PLL varactor drivers
- Use Cases:
- Driving MOSFET gates and IGBT gate driver circuits in automotive motor control with high capacitive gate charge.
- High-side and low-side current sensing using the beyond-rail input common-mode range in 12V/24V automotive systems.
- Capacitive proximity sensor front-end with rail-to-rail output driving long shielded cables without oscillation.
Market Reference Price
| Market |
Price Range |
Currency |
| Huaqiangbei Spot |
$0.60 – $1.20 |
USD |
| Overseas B2B |
$0.80 – $2.28 |
USD |
Related Models Comparison
| Model |
Difference |
Application |
| LM7322MA |
Dual-channel version (2 op amps in SOIC-8), same 20MHz / 18V/μs performance |
Space-constrained designs needing two high-drive amplifiers |
| LM7321MF |
Same amplifier in SOT-23-5 package for ultra-compact single-amplifier layouts |
Minimal PCB footprint applications (sensors, portable) |
| OPA551 |
Higher voltage (60V), higher output current (200mA), but lower bandwidth (3MHz) |
High-voltage/high-current drive where speed is not critical |
