At present, the main manufacturers of AD/DA are ADI, TI, BB, PHILIP, MOTOROLA, etc. Wuhan Liyuan Company has many years of experience in electronic products and strong technical support, and has obtained the world's leading analog IC manufacturers ADI, TI's agency, operating a full range of AD/DA devices for various fields / occasions.

1. AD/DA device from AD company

AD has maintained market leadership in a variety of analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) (collectively referred to as data converters), including high-speed, high-precision data converters and currently popular microconverter systems ( MicroConvertersTM).

1) With signal conditioning, 1mW power consumption, dual-channel 16-bit AD converter: AD7705

AD7705 is an AD converter suitable for low frequency measuring instruments produced by AD company. It can directly convert the weak input signal received from the sensor to a serial digital signal output without the need for an external instrumentation amplifier. The Σ-Δ ADC is used to achieve 16-bit error-free performance, and the on-chip programmable amplifier can set the input signal gain. The first notch of the digital filter can be set by adjusting the turn-off time and update rate of the internal digital filter through on-chip control registers. With a +3V supply and a 1MHz master clock, the AD7705 consumes only 1mW. AD7705 is an ideal circuit based on microcontroller (MCU) and digital signal processor (DSP) system, which can further save cost, reduce size, and reduce system complexity. Applied to microprocessor (MCU), digital signal processing (DSP) system, hand-held instrument, distributed data acquisition system.

2) 3V/5V CMOS signal conditioning AD converter: AD7714

The AD7714 is a complete analog front end for low frequency measurement applications, receiving small signals directly from sensors and outputting serial digital quantities. It uses sigma-delta conversion techniques to achieve up to 24-bit precision code without loss. The input signal is applied to a dedicated programmable gain amplifier located at the front end of the analog modulator. The output of the modulator is processed by an on-chip digital filter. The first notch of the digital filter is programmed through an on-chip control register that adjusts the filter cutoff and settling times. The AD7714 has 3 differential analog inputs (can also be 5 pseudo-differential analog inputs) and a differential reference input. Single-supply operation (+3V or +5V). Therefore, the AD7714 can perform all signal conditioning and conversion for systems with up to 5 channels. Ideal for sensitive microcontroller or DSP-based systems, the AD7714 has a serial interface for 3-wire operation through which gain, signal polarity, and channel selection can be set in software. The AD7714 has self-calibration, system and background calibration options, and also allows the user to read and write on-chip calibration registers. The CMOS structure ensures very low power consumption, and the power saving mode reduces the standby power consumption to 15μW (typ.).

3) Micro-power 8-channel 12-bit AD converter: AD7888

AD7888 is a high-speed, low-power 12-bit AD converter, single-supply operation, the voltage range is 2.7V ~ 5.25V, the conversion rate is up to 125ksps, the minimum input track-hold signal width is 500ns, and the single-ended sampling method is used. AD7888 includes 8 single-ended analog input channels, the analog input range of each channel is 0～Vref. The device converts full power signals to 3MHz. The AD7888 has an on-chip 2.5V voltage reference, which can be used as a reference source for the analog-to-digital converter. The pin REF in/REF out allows the user to use this reference, and can also drive this pin in turn to provide an external reference to the AD7888. The voltage range of the reference is 1.2V to VDD. The CMOS structure ensures a power consumption of 2mW (typ) in normal operation and 3μW in power saving mode.

4) Micro power consumption, full-scale voltage output, 12-bit DA converter: AD5320

AD5320 is a single-chip 12-bit voltage output D/A converter, single power supply operation, the voltage range is +2.7V ~ 5.5V. The on-chip high-precision output amplifier provides full-supply amplitude output. The AD5320 utilizes a 3-wire serial interface with a clock frequency of up to 30MHz and is compatible with standard SPI, QSPI, MICROWIRE and DSP interface standards. The AD5320's reference comes from the power supply input, thus providing the widest dynamic output range. The device contains a power-on reset circuit that ensures the output of the D/A converter is stable at 0V until a valid write input signal is received. The device has a power saving feature to reduce the current consumption of the device, typically 200nA at 5V. In power saving mode, software selectable output load is provided. The power saving mode can be entered through the control of the serial interface. Low power consumption during normal operation makes this device ideal for handheld battery powered equipment. Power consumption is 0.7mW at 5V, dropping to 1µW in power-saving mode.

5) 24-bit intelligent data conversion system MicroConvertersTM: ADuC 824

The ADuC 824 is the latest member of the MicroConvertersTM family, which is a sigma-delta converter with flashing electrically erasable programmable memory (Flash/EEPROM) pioneered by AD. It is unique in that it integrates high-performance data converters, flash memory with program and data, and an 8-bit microcontroller. The ADuC824 is a complete high-precision data acquisition system-on-chip when you choose high-precision data conversion for industrial, instrumentation, and smart sensor interface application requirements.

2. TI AD/DA devices

Texas Instruments is an international high-tech product company and one of the world's largest suppliers of semiconductor products. In 1998, the sales volume of semiconductor products ranked fifth in the world, among which the sales volume of DSP products ranked first in the world. The world's first.

1) TLC548 /549

The use of the TLC548 and TLC549 is very similar to the more complex TLC540 and TLC541; however, the TLC548 and TLC549 provide an on-chip system clock that typically operates at 4MHz and requires no external components. The on-chip system clock makes the operation of the internal devices independent of the serial input/output timing and allows the TLC548 and TLC549 to work as required by many software and hardware. The I/OCLOCK together with the internal system clock enables high-speed data transfer, 45,500 conversions per second for the TLC548 and 40,000 conversions per second for the TLC549.

Other features of the TLC548 and TLC549 include general-purpose control logic, on-chip sample-and-hold circuits that can operate automatically or under microprocessor control, differential high-impedance reference inputs, easy ratiometric conversion, scaling ( scaling) and circuits isolated from logic and power noise. The design of the entire switched capacitor successive approximation converter circuit allows conversions to be achieved in less than 17µs with a maximum total error of ±0.5 least significant bits (LSB).

2) TLV5616

The TLV5616 is a 12-bit voltage output digital-to-analog converter (DAC) with a flexible 4-wire serial interface that seamlessly interfaces with TMS320, SPI, QSPI, and Microwire serial ports. The digital power supply and the analog power supply are respectively powered, and the voltage range is 2.7~5.5V. The output buffer is a gain of 2 rail-to-rail output amplifier, which is class AB to improve stability and reduce settling time. The rail-to-rail output and power-down method is ideal for single-supply, battery-operated applications. The settling time and power consumption ratio can be optimized by the control word.

3) TLV5580

The TLV5580 is an 8-bit 80MSPS high-speed A/D converter. Convert analog signals to 8-bit binary data at sampling rates up to 80MHz. Digital inputs and outputs are 3.3VTTL/CMOS compatible. Low power consumption due to 3.3V power supply and improved single-pipeline structure in CMOS process. The voltage reference of this chip is very flexible, there are on-chip and external reference, the full-scale range is 1Vpp to 1.6Vpp, depending on the analog supply voltage. When using an external reference, the internal reference can be turned off to reduce chip power consumption.