English
Menu

How to read datasheets

For an op-amp with a slew rate of 0.5 V/µs, roughly what is the maximum frequency at which a sine wave with an amplitude (peak) of 10 V can be output without distortion?

  1. AAbout 8 kHz
  2. BAbout 50 kHz
  3. CAbout 800 Hz
Show answer and explanation

Answer: A. About 8 kHz

The maximum slope of a sine wave Vp sin(2πft) is 2πf × Vp. If this exceeds the slew rate, the output cannot keep up and distorts into a triangle-like wave. f = SR/(2π × Vp) = 0.5 × 10⁶ V/s ÷ (2π × 10 V) ≈ 8 kHz. This is called the full-power bandwidth, and it falls as amplitude increases. Note that even if the gain-bandwidth product (GBW) is sufficient, bandwidth for large-amplitude signals is limited by the slew rate. About 50 kHz is the value obtained by forgetting to multiply by 2π.

Practice this topic Back to topic

Books on How to read datasheets Ad

As an Amazon Associate I earn from qualifying purchases.

More How to read datasheets questions

  1. A non-inverting amplifier with a gain of 100 is built using an op-amp with an input offset voltage of max 2 mV. With the input at 0 V, which is the guide for the maximum error voltage that can appear at the output?
  2. The datasheet of an op-amp used on a single 5 V supply gives the common-mode input range as "0 V to (V+ − 1.5 V)." Which is correct?
  3. A 3.3 V output LDO has a dropout voltage specified as max 300 mV (at 500 mA output current). What is the minimum input voltage needed to maintain the output voltage while supplying 500 mA?
  4. An LDO with a PSRR (power supply rejection ratio) of 60 dB at 1 kHz has a 1 kHz, 100 mV ripple on its input. Which is the guide for the ripple appearing at the output?
  5. Which condition is most closely related to the "no missing codes" guarantee in an A/D converter datasheet?