component
MAX9918ASA+T
Public Unreviewedby Ray
Analog Devices Inc Maxim Integrated Current Sense Amplifiers, SOIC-8-EP. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads when scrolled away or the tab is hidden.
PCB Footprint
Open full view ↗Loads on click. Unloads when scrolled away or the tab is hidden.
Datasheet
Open in new tab ↗Loads on click. Unloads when scrolled away or the tab is hidden.
README
markdownMAX9918ASA+T
Analog Devices Inc Maxim Integrated · Current Sense Amplifiers · SOIC-8-EP
MAX9918ASA+T from Analog Devices Inc Maxim Integrated, in a SOIC-8-EP. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | RS+ | input | Positive current-sensing input. Power side of the external sense resistor. Common-mode range -20V to +75V (VCC=5V). Typical common-mode input resistance 300kΩ; input bias current ±175µA (typ) at TA=+25°C. |
| 2 | RS- | input | Negative current-sensing input. Load side of the external sense resistor. Full-scale differential sense voltage (VRS+ - VRS-) = 50mV; ±15V differential absolute maximum. Differential input resistance ~715Ω. |
| 3 | SHDN | input | Active-high shutdown input. Drive high (VIH ≥ 2.0V) to enter low-power shutdown (ICC_SHDN = 0.5µA typ). Connect to GND (VIL ≤ 0.8V) for normal operation. Absolute maximum -0.3V to +20V. |
| 4 | GND | power_in | Ground return for the device. Tie to system ground; use a single-point star ground for best current-measurement accuracy. |
| 5 | OUT | output | Current-sense amplifier output. VOUT is proportional to VSENSE (VOUT = VSENSE × G). Rail-to-rail; short-circuit current ~44mA to VCC, ~41mA to GND. Output resistance ~0.1Ω. Keep OUT ≥100mV from either rail for rated accuracy. |
| 6 | FB | input | Feedback input for the internal instrumentation amplifier. Connect to the R1/R2 resistive-divider network between OUT and REFIN to set the gain: G = 1 + (R2/R1). Minimum adjustable gain 30V/V. |
| 7 | REFIN | input | Reference input for the output stage. Drive with a low-source-impedance reference: set REFIN = GND for unidirectional operation, or REFIN = VCC/2 for bidirectional operation. Allowed range 0V to VCC - 1.9V. REFIN current ±100µA (max). |
| 8 | VCC | power_in | 5V supply input (operating range 4.5V to 5.5V). Bypass to GND with a 0.1µF ceramic capacitor. Typical supply current 0.7-1.0mA; 0.5µA typ in shutdown. |
| EP | EP | power_in | Exposed thermal pad. Connect to a large-area contiguous ground plane for improved power dissipation and electrical performance. Do not use as the sole ground connection for the part. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc Maxim Integrated |
| Package | SOIC-8-EP |
| Category | Amplifiers/Comparators |
| Pins | 9 |
Ordering variants
Same part, different packaging or reel option.
MAX9918ASA+TMAX9918ASA+TASA/V+
CAD (KiCad official)
- Symbol:
MAX9918ASA+T - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm - 3D model: SOIC-8-EP (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices Inc Maxim Integrated datasheet (None pp, sha256
f62a520074711291, retrieved 2026-08-17, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).