Please refer to the top of the Op-amp/Comparator page. We offer a broad lineup of products in multiple package types optimized for a wide range of applications, including high voltage resistance models and easy-to-use CMOS units featuring low voltage operation.

Single supply op-amps feature ground sense functionality, enabling support for ground level input. Dual supply op-amps, however, although compatible with single supply operation, will not function correctly with ground level input.

CMOS op-amps, due to their construction, feature exceedingly small input bias current (on the order of pA/fA) and low power consumption, making them ideal for low voltage logic IC peripheral circuitry and sensor applications requiring low input bias current. Additional characteristics include input/output full swing operation with a dynamic range between ground level and the supply voltage.
Bipolar op-amps feature high voltage resistance and broad operating voltage range, making them compatible with a wide variety of applications. In addition, the element matching precision is generally superior to CMOS op-amps, resulting in a smaller input offset voltage. However, the input bias current (based on the transistor Base current) will increase. Bipolar op-amps also display better element noise characteristics then their CMOS counterparts.

The operating voltage range of dual supply op-amps listed in the specifications must be extrapolated. The BA4558R, for example, lists an operating voltage range of ±4V to ±15V, meaning V_CC/V_EE = +4V/-4V to +15V/-15V, signifying a V_CC-V_EE voltage difference of 8-30V (during single power supply operation).

The method is contained in the usage precautions.
In the case of op-amps, a negative feedback circuit (i.e. voltage follower) is formed and the input/output voltage setting method for determining the DC operating point within the common mode input voltage and output voltage ranges follows the usual method. For comparators, in order to ensure that the output terminal is open and the output voltage is fixed to either High or Low the voltage difference between the inverting and non-inverting terminals must be allowed. If it is difficult to provide a potential difference between the input terminals both terminals should be connected and the potential set to a value within the common mode input voltage range.

Input/output full swing op-amps allow both the input and output voltages to vary between ground level and the power supply voltage. Examples of this type are the BU7261, BU7241, BU7262, and BU7242 CMOS op-amps. Output full swing op-amps enable only the output voltage to be set between ground and the supply voltage. ROHM offers a full lineup of output full swing (low saturation) op-amps, including the BA2115 and BA4510.

The BA2904 features largely the same electrical characteristics as the BA10358, but with improved ESD resistance and a wider operating temperature range. A maximum operating temperature of 125ºC is possible due to optimization of processes and circuitry. This makes the BA2904 ideal for ideal not only for high reliability applications, but for conventional sets currently using the BA10358 as well. System quality is improved and pin compatibility eliminates the need for troublesome substrate modification.

The BA10393 features an input voltage range between 0V and V_CC-1.5V (single supply operation), and can operate if a voltage within this range is applied to either the inverting or non-inverting input terminal, even if the voltage of the other terminal exceeds the recommended range (the output will switch from High to Low or Low to High based on the input voltage difference). However, in this case the response characteristics of the particular application must be verified. Similar products are the BA10339, BA2903, and BA2901.

The BA10358 features an output voltage range between 0V and V_cc-1.5V (at Ta=25ºC, RL=2kΩ).
Low and High levels correspond to 0V and V_cc-1.5V, respectively, meaning if the Low level is greater than 0V High will exceed V_cc-1.5V. There are times when a maximum limit for the Low voltage level is required. In this case the recommended value is 250mV. If the output sync current in the BA10358 is less than 10uA a voltage close to the Ground level will be output. However, if the sync current exceeds 10uA the Low level output will not be close to Ground due to the large output current required for PNP transistor operation.