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ADA4940-1ACPZ-R7

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Analog Devices Differential Amplifiers, LFCSP-16(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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docs ada4940-1acpz-r7: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
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ada4940-1acpz-r7-etched.step ada4940-1acpz-r7: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
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page.json ada4940-1acpz-r7: specified limits as data (metadata.characteristics, 43 rows from the datasheet) · Ray 25d ago
README.md ada4940-1acpz-r7: specified limits as data (metadata.characteristics, 43 rows from the datasheet) · Ray 25d ago

ADA4940-1ACPZ-R7

Analog Devices · Differential Amplifiers · LFCSP-16(3x3)

ADA4940-1ACPZ-R7 from Analog Devices, in a LFCSP-16(3x3). 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 −FB output Negative feedback output terminal; connects to negative input summing node through feedback resistor network for gain setting.
2 +IN input Positive input summing node; unity-gain input terminal for differential signal or feedback current input.
3 −IN input Negative input summing node; unity-gain input terminal for differential signal or feedback current input.
4 +FB output Positive feedback output terminal; connects to positive input summing node through feedback resistor network for gain setting.
5 +VS power_in Positive power supply voltage; operational range 3 V to 7 V for LFCSP package.
6 +VS power_in Positive power supply voltage; operational range 3 V to 7 V for LFCSP package.
7 +VS power_in Positive power supply voltage; operational range 3 V to 7 V for LFCSP package.
8 +VS power_in Positive power supply voltage; operational range 3 V to 7 V for LFCSP package.
9 VOCM input Output common-mode voltage control input; sets DC common-mode level of differential outputs; input impedance approximately 250 kΩ.
10 +OUT output Positive output terminal for load connection; differential output swing −VS + 0.07 V to +VS − 0.07 V; output impedance <1 Ω at DC.
11 −OUT output Negative output terminal for load connection; differential output swing −VS + 0.07 V to +VS − 0.07 V; output impedance <1 Ω at DC.
12 DISABLE input Disable control input; disable amplifier at ≤(−VS + 1) V to reduce quiescent current to 13.5 μA; enable at ≥(−VS + 1.8) V.
13 −VS power_in Negative power supply voltage; ground reference or negative supply for amplifier operation.
14 −VS power_in Negative power supply voltage; ground reference or negative supply for amplifier operation.
15 −VS power_in Negative power supply voltage; ground reference or negative supply for amplifier operation.
16 −VS power_in Negative power supply voltage; ground reference or negative supply for amplifier operation.
17 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Analog Devices
Package LFCSP-16(3x3)
Category Amplifiers/Comparators
Pins 17

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input offset voltage -0.35 0.06 0.35 mV VS = 5 V; VIP = VIN = VOCM = 0 V 3
Input offset current -500 50 500 nA VS = 5 V 3
Input bias current -1.6 -1.1 µA VS = 5 V 3
Common-mode rejection ratio (CMRR) CMRR 86 119 dB VS = 5 V; ΔVIN,cm = ±1 V DC 3
Open-loop gain 91 99 dB VS = 5 V 3
Output balance error -65 -60 dB VS = 5 V; OUT,cm / OUT,dm 3
VOCM gain 0.99 1 1.01 V/V VS = 5 V; OCM = ±1 V 4
Output common-mode offset voltage VOS,cm -6 1 6 mV VS = 5 V; VIP = VIN = VOCM = 0 V 4
VOCM input bias current -7 4 7 µA VS = 5 V 4
VOCM common-mode rejection ratio 86 100 dB VS = 5 V; OCM = ±1 V 4
Supply voltage operating range (LFCSP) VS 3 7 V LFCSP package; VS = 5 V table 4
Quiescent current per amplifier, enabled 1.05 1.25 1.38 mA VS = 5 V; Enabled 4
Quiescent current per amplifier, disabled 13.5 28.5 µA VS = 5 V; Disabled 4
+PSRR 80 90 dB VS = 5 V; ΔVS = 1 V p-p 4
−PSRR 80 96 dB VS = 5 V; ΔVS = 1 V p-p 4
DISABLE pin bias current, enabled 2 5 µA VS = 5 V; Enabled, DISABLE = +2.5 V 4
DISABLE pin bias current, disabled -10 -5 µA VS = 5 V; Disabled, DISABLE = −2.5 V 4
Operating temperature range -40 125 °C 4
Input offset voltage -0.4 0.06 0.4 mV VS = 3 V; VIP = VIN = VOCM = 1.5 V 5
Input offset current -500 50 500 nA VS = 3 V 5
Input bias current -1.6 -1.1 µA VS = 3 V 5
Common-mode rejection ratio (CMRR) CMRR 86 114 dB VS = 3 V; ΔVIN,cm = ±0.25 V DC 5
Open-loop gain 91 99 dB VS = 3 V 5
Output balance error -65 -60 dB VS = 3 V; OUT,cm / OUT,dm 5
VOCM gain 0.99 1 1.01 V/V VS = 3 V; OCM = ±0.25 V 6
Output common-mode offset voltage VOS,cm -7 1 7 mV VS = 3 V; VIP = VIN = VOCM = 1.5 V 6
VOCM input bias current -5 1 5 µA VS = 3 V 6
VOCM common-mode rejection ratio 80 100 dB VS = 3 V; OCM = ±0.25 V 6
Supply voltage operating range (LFCSP) VS 3 7 V LFCSP package; VS = 3 V table 6
Quiescent current per amplifier, enabled 1 1.18 1.33 mA VS = 3 V; Enabled 6
Quiescent current per amplifier, disabled 7 22 µA VS = 3 V; Disabled 6
+PSRR 80 90 dB VS = 3 V; ΔVS = 0.25 V p-p 6
−PSRR 80 96 dB VS = 3 V; ΔVS = 0.25 V p-p 6
DISABLE pin bias current, enabled 0.3 1 µA VS = 3 V; Enabled, DISABLE = +3 V 6
DISABLE pin bias current, disabled -6 -3 µA VS = 3 V; Disabled, DISABLE = 0 V 6
Supply voltage (absolute maximum) 8 V 7
Differential input voltage (absolute maximum) 1.2 V 7
Storage temperature range -65 150 °C 7
Lead temperature (soldering) 300 °C 10 s soldering 7
Junction temperature TJ 150 °C 7
ESD, field-induced charged device model (FICDM) 1250 V FICDM 7
ESD, human body model (HBM) 2000 V HBM 7
Thermal resistance, junction-to-ambient (16-lead LFCSP) θJA 91.3 °C/W 16-lead LFCSP, single, 4-layer board, still air 7

CAD (KiCad official)

  • Symbol: ADA4940-1ACPZ-R7
  • Footprint: Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm
  • 3D model: LFCSP-16(3x3) (KiCad packages3D, STEP)
  • 3D model files: ada4940-1acpz-r7-etched.step / ada4940-1acpz-r7-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ada4940-1acpz-r7.step / ada4940-1acpz-r7.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Analog Devices datasheet (32 pp, sha256 2045220fbf3aa3cc, retrieved 2026-09-22, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF