COMPARISON · OSCILLOSCOPES
PicoScope 2204A vs Digilent Analog Discovery 3
PicoScope 2204A vs Digilent Analog Discovery 3 is a choice between a focused USB oscilloscope and a USB lab-in-a-box. Both are two-channel, USB-powered and run on Windows, macOS and Linux. The PicoScope is a 10 MHz, 8-bit scope with polished software and serial decoding; the Analog Discovery 3 adds 14-bit resolution, a two-channel generator, 16 logic channels and power supplies.
By the OhmSavvy Research Team ·
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PicoScope 2204A
4.3★★★★☆A pocket USB scope with Pico's polished software: serial decoding, spectrum analysis and a built-in generator.
Digilent Analog Discovery 3
4.6★★★★★A USB instrument that is a 14-bit two-channel scope, two-channel generator, 16-channel logic analyzer and power supply.
Specs side by side
| PicoScope 2204A | Digilent Analog Discovery 3 | |
|---|---|---|
| Rating | 4.3★★★★☆ | 4.6★★★★★ |
| Bandwidth | 10MHz | 30+ MHz (with BNC adapter) |
| Channels | 2 | 2 analog + 16 digital |
| Sample rate | 100 MS/s (1 ch); 50 MS/s (2 ch) | 125 MS/s per channel |
| Best for | Laptop users, audio and slow digital buses | Students and embedded developers |
| Vertical resolution | 8-bit (up to 12-bit enhanced in software) | 14-bit |
| Sample rate | 100 MS/s (1 ch); 50 MS/s (2 ch) | 125 MS/s per channel |
| Rise time | 35 ns (Pico, calculated) | ≈12 ns (our 0.35 ÷ 30 MHz estimate) |
| Memory | 8 kS block, shared by active channels; 100 MS streaming | 32,768 samples per channel (Digilent spec page) |
| Input range | Up to ±20 V; 10 mV/div to 4 V/div | ±2.5 V and ±25 V ranges |
| Input coupling | AC or DC | Not stated on the pages we checked |
| Triggers | Edge, window, pulse width, dropout, interval, logic | Not stated on the pages we checked |
| Signal generator | 1 channel, 0.1 Hz–100 kHz, ±2V, sweep + 12-bit AWG | 2 channels, 14-bit, ±5V; 9 MHz, or 12 MHz with BNC adapter |
| Logic channels | None | 16 digital I/O |
| Power supplies | None | Programmable ±5V |
| Inputs | BNC | Flywire; BNC adapter sold separately |
| Size / power | 142 × 92 × 18.8 mm, under 0.2 kg; USB 2.0 powered | Pocket-sized; USB-C powered |
| Warranty | 5 years | Not stated on the pages we checked |
Specs checked against manufacturer documentation and official Amazon listings. Desk research, not bench testing. How we research.
Key differences
- →The Analog Discovery 3 reaches 30+ MHz with its BNC adapter against the PicoScope's 10 MHz.
- →The AD3 is a 14-bit instrument; the 2204A is 8-bit, with software-enhanced resolution up to 12 bits.
- →The AD3 adds a two-channel generator, 16 logic channels and programmable ±5V supplies; the PicoScope has a single generator to 100 kHz.
- →The PicoScope has BNC inputs built in; the AD3 needs its separately sold BNC adapter for full bandwidth and standard probes.
- →Pico lists serial decoding, mask testing and advanced triggers in PicoScope 7; the AD3 decodes SPI, I2C, UART and CAN through its logic channels in WaveForms.
- →Pico gives the 2204A a 5-year warranty.
PicoScope 2204A vs Analog Discovery 3 spec by spec
On raw scope numbers the Digilent leads almost everywhere: three times the bandwidth, 125 MS/s per channel against 50 MS/s with both channels on, 64 times as many quantization levels and a far deeper capture buffer. The PicoScope's strengths sit in its software and its plug-in-a-probe simplicity, which the charts can't show.
Bars use a logarithmic scale: each step is ten times the last.
The capture window is where the PicoScope fights back. Its 80 µs block is short, but PicoScope 7 can stream over USB into up to 100 MS of memory at lower sample rates, which suits slow sensor signals, battery discharge curves and long serial transactions. For more on why these limits interact, read what oscilloscope bandwidth means and what GSa/s means.
What 14 bits buys over 8 bits
An 8-bit scope divides its vertical range into 256 levels; a 14-bit instrument divides it into 16,384. Take a 5 V span as a worked example: the ideal step is about 19.5 mV at 8 bits (5 ÷ 256) and about 0.31 mV at 14 bits (5 ÷ 16,384). Noise means neither instrument resolves its full theoretical step, but the gap is real when you zoom in on a small signal riding on a larger one, such as 20 mV of ripple on a 5 V rail.
The PicoScope narrows the gap in software. Its resolution enhancement filters the sampled data to reach up to 12 bits, which works well on slow signals but trades away effective bandwidth on fast ones. AC coupling on the 2204A also helps ripple work, because it strips the DC level so you can use a sensitive range. For ripple specifically, see our guide to oscilloscope bandwidth for switching power supplies.
What each device replaces on a bench
Oscilloscope
Both: 2 channels. Pico 10 MHz 8-bit; AD3 30+ MHz 14-bit.
Signal generator
Pico: 1 channel to 100 kHz. AD3: 2 channels, 12 MHz with adapter.
Logic analyzer
AD3 only: 16 channels plus pattern generation.
Power supply
AD3 only: programmable ±5V rails.
Spectrum analysis
Both, in PicoScope 7 or WaveForms.
Network / impedance
AD3 only, in WaveForms.
Take a typical student build: a microcontroller reading a sensor over I2C, with an analog filter on one pin. On the Analog Discovery 3, one USB cable does it all. The ±5 V rail powers the board, a generator channel drives the filter, both analog inputs watch the filter's input and output, and the logic lines decode the I2C bus. On the PicoScope 2204A, the two channels and built-in generator handle the filter test as long as the test tone stays at or below 100 kHz, but the board needs its own supply and the bus needs a separate logic analyzer or decoding from the analog channels. Neither is wrong; it comes down to how many boxes you want on the desk.
USB scopes need a computer
Probes, inputs and day-to-day use
The 2204A has two BNC sockets, so standard passive scope probes plug straight in, and its ranges run from 10 mV/div to 4 V/div with inputs up to ±20 V. That makes it feel like a small benchtop scope that borrows your laptop's screen. The AD3 ships with flywire leads instead. They are convenient on a breadboard but unshielded, so Digilent sells a BNC adapter that adds standard probe inputs and unlocks the full 30+ MHz scope bandwidth and 12 MHz generator. Budget for it if you plan to measure anything fast.
The software split is just as important. PicoScope 7 is a focused scope application with serial decoding, mask limit testing, math channels and a spectrum view. Digilent's WaveForms groups every instrument in one application and can be driven from Python, C, LabVIEW or MATLAB, which suits course labs and automated test rigs. This page is desk research against each maker's published specs; we haven't tested either unit.
PicoScope 2204A vs Analog Discovery 3: which should you buy?
| You are… | Better fit | Why |
|---|---|---|
| Audio or sensor hobbyist with scope probes | PicoScope 2204A | BNC inputs, AC coupling and 10 MHz is enough |
| Student in an electronics or embedded course | Analog Discovery 3 | Scope, generator, logic and supplies in one |
| Firmware developer debugging SPI or I2C | Analog Discovery 3 | 16 logic channels with protocol decoding |
| Engineer automating tests from Python or MATLAB | Analog Discovery 3 | WaveForms SDK and scripting |
| Logging a slow signal for minutes | PicoScope 2204A | USB streaming into 100 MS of memory |
| Measuring small ripple on a supply rail | Analog Discovery 3 | 14-bit resolution; Pico's AC coupling helps too |
| Buyer who wants the longest warranty | PicoScope 2204A | Pico gives 5 years |
If a USB scope at a lower cost is the goal, see PicoScope 2204A vs Hantek 6022BE, or browse our oscilloscope buying guide.
Safety: keep USB scopes off mains
Choose the PicoScope 2204A if…
- ✓You want BNC inputs and standard scope probes out of the box
- ✓You value PicoScope 7's serial decoders, mask testing and spectrum view
- ✓You only need a scope and a simple generator up to 100 kHz
Choose the Digilent Analog Discovery 3 if…
- ✓You want a scope, generator, logic analyzer and ±5V supplies in one device
- ✓You want 14-bit resolution and three times the bandwidth
- ✓You'll script tests in Python, C, LabVIEW or MATLAB
The bottom line
Buy the Digilent Analog Discovery 3 if you want the most capability per desk inch: more bandwidth, 14-bit resolution, a dual generator, logic analysis and power supplies. Buy the PicoScope 2204A if you want a simple, compact scope with BNC inputs and Pico's polished software for audio, sensors and slow serial buses.
Frequently asked questions
Do I need a computer for the PicoScope 2204A or Analog Discovery 3?+
Yes. Both are USB instruments with no screen of their own, and both draw power from the USB port. The PicoScope runs PicoScope 7 and the Analog Discovery 3 runs Digilent's WaveForms, each available for Windows, macOS and Linux. A laptop makes either one portable.
Can I use normal scope probes with the Analog Discovery 3?+
Only with Digilent's BNC adapter, which is sold separately. Out of the box the AD3 uses flywire leads, which are handy on a breadboard but unshielded. Digilent also says the adapter is needed for the full 30+ MHz scope bandwidth and for the 12 MHz generator figure; without it the generator is rated at 9 MHz.
How many serial protocols can the PicoScope 2204A decode?+
Pico's datasheet lists 38 built-in decoders, including CAN, I2C, LIN, SPI and RS-232/UART, and Pico's Amazon listing says 40, likely reflecting newer software. Decoding runs on the analog channels, so the 10 MHz bandwidth limits it to slower buses. The AD3 decodes SPI, I2C, UART and CAN on its 16 digital channels instead.
Which is better for students?+
The Analog Discovery 3, for most courses. One device covers oscilloscope, waveform generator, logic analyzer and bench supply exercises, so a single purchase follows a student through several lab modules. The PicoScope suits a student who only needs a scope with standard probes and wants a 5-year warranty on a small box.
How deep is the Analog Discovery 3's memory?+
Digilent's shop page doesn't publish a buffer size, but its specifications page lists 32,768 samples per channel for the scope and the generator. The PicoScope 2204A has 8 kS of block memory shared between active channels and can stream up to 100 MS over USB, which favors long, slow captures over fast single shots.
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