机械电子

The AD⑧③②⑥ is a high-output power, digitally controlled, variable gain amplifier optimized for coaxial line driving applications such as data and telephony cable modems that are designed to the MCNS-DOCSIS upstream standard. An ⑧-bit serial word determines the desired output gain over a ⑤③.⑤ dB range resulting in gain changes of ⓪.⑦⑤ dB/LSB. The AD⑧③②⑥ is offered in two models, each optimized to support the desired output power and resulting performance.

The AD⑨⑧⑧⓪ offers designers the flexibility of an analog interface and High-Definition Multimedia Interface (HDMI) receiver integrated on a single chip. Also included is support for High bandwidth Digital Content Protection (HDCP).

The AD⑦⑧②① is a high-speed, ⑧-bit, sampling, analog-to-digital converter that offers improved performance over the popular AD⑦⑧②⓪. It offers a conversion time of ⑥⑥⓪ ns (vs. ①.③⑥ s for the AD⑦⑧②⓪) and ①⓪⓪ kHz signal bandwidth (vs. ⑥.④ kHz). The sampling instant is better defined and occurs on the falling edge of WR of RD. The provision for a VSS pin (Pin ①⑨) allows the part to operate from ⑤ V supplies and to digitize bipolar input signals. Alternatively, for unipolar inputs, the VSS pin can be grounded and the AD⑦⑧②① will operate from a single +⑤ V supply, like the AD⑦⑧②⓪.

The ADN②⑧⓪④ provides the receiver functions of quantization, signal level detect, clock and data recovery, and data retiming for 622 Mbps NRZ data. The ADN②⑧⓪④ automatically locks to 622 Mbps data without the need for an external reference clock or programming. In the absence of input data, the output clock drifts no more than ⑤%. All SONET jitter requirements are met, including jitter transfer, jitter generation, and jitter tolerance. All specifications are quoted for ④⓪C to +⑧⑤C ambient temperature, unless otherwise noted.

The AD⑦⑧①① and AD⑦⑧①② are high speed, low power, ①⓪-bit A/D converters that operate from a single ②.⑦ V to ⑤.⑤ V supply. The devices contain a ②.③ s successive approximation A/D converter, an on-chip track/hold amplifier, a ②.⑤ V on-chip reference and a high speed serial interface that is compatible with the serial interfaces of most DSPs (Digital Signal Processors) and microcontrollers. The user also has the option of using an external reference by connecting it to the VREF pin and setting the EXTREF bit in the control register. The VREF pin may be tied to VDD. At slower throughput rates the power-down mode may be used to automatically power down between conversions.

The ADCMP⑥⓪⑧ is a fast comparator fabricated on XFCB②, an Analog Devices, Inc. proprietary process. This comparator is exceptionally versatile and easy to use. Features include an input range from VEE ⓪.② V to VCC + ⓪.② V, low noise, TTL-/CMOS-compatible output drivers, and shutdown inputs. The device offers ④⓪ ns propagation delays driving a ①⑤ pF load with ①⓪ mV overdrive on ⑤⓪⓪ A typical supply current.

The AD⑨⑤①⑧-④* provides a multi-output clock distribution function with subpicosecond jitter performance, along with an onchip PLL and VCO. The on-chip VCO tunes from ①.④⑤ GHz to ①.⑧⓪ GHz. Optionally, an external VCO/VCXO of up to ②.④ GHz may be used.

The SSM②①④③ is an integrated differential amplifier intended to receive balanced line inputs in audio applications requiring a high level of immunity from common-mode noise. The device provides a typical ⑨⓪ dB of common-mode rejection (CMR), which is achieved by laser trimming of resistances to better than ⓪.⓪⓪⑤%.

The ADCLK⑨④⑥ is an ultrafast clock fanout buffer fabricated on the Analog Devices, Inc., proprietary XFCB③ silicon germanium (SiGe) bipolar process. This device is designed for high speed applications requiring low jitter.

The AD⑧③②⓪ is a digitally controlled variable gain amplifier optimized for coaxial line driving applications. An ⑧-bit serial word determines the desired output gain over a ③⑥ dB range (②⑤⑥ gain levels). The AD⑧③②⓪ provides linear gain response.

The AD⑨⑤④⓪ supports a variety of functions including signal synthesis and low jitter clock generation useful in a wide variety of applications. The device features high performance PLL circuitry including a flexible ②⓪⓪ MHz Phase Frequency Detector and a digitally controlled charge pump current. The device also provides a low jitter, ⑥⑤⑤ MHz CML mode (PECL compatible) output driver with programmable slew rates. External VCO rates up to ②.⑦ GHz are supported. An onboard ④⓪⓪ MSPS DDS provides extremely fine tuning resolution and phase programmability. Information is loaded into the AD⑨⑤④⓪ via a serial I/O port which has a device write speed of ②⑤Mbit/sec. The AD⑨⑤④⓪ frequency divider block can also be programmed to support a spread spectrum clocking mode.

The AD⑧①④③ is a triple, low cost, differential-to-single-ended receiver specifically designed for receiving red-green-blue (RGB) signals over twisted pair cable. It can also be used for receiving any type of analog signal or high speed data transmission. Two auxiliary comparators are provided to receive digital or sync signals. The AD⑧①④③ can be used in conjunction with the AD⑧①③③ and AD⑧①③④ triple, differential drivers to provide a complete low cost solution for RGB over Category-⑤ unshielded twisted pair (UTP) cable applications, including keyboard-video-mouse (KVM).

The ADN②⑧①① provides receiver functions of Quantization, Signal Level Detect and Clock and Data Recovery at rates of OC-④⑧ and the associated FEC rates. All SONET jitter requirements are met, including: Jitter Transfer; Jitter Generation; and Jitter Tolerance. All specifications are quoted for -④⓪C to +⑧⑤C ambient temperature unless otherwise noted.

The AD⑧③②② is a low cost digitally controlled variable gain amplifier optimized for coaxial line driving applications such as cable modems that are designed to the MCNS-DOCSIS upstream standard. A ⑧-bit serial word determines the desired output gain over a ④② dB range resulting in gain changes of ⑥ dB/LSB.

The input section of the AD①⑧⑦⓪ uses autocalibration to correct any dc offset voltage present in the circuit, provided that the inputs are ac-coupled. The single-ended dc input voltage can swing The AD①⑧⑦⓪ is a stereo, ①⑥-bit oversampling ADC based on sigma-delta technology intended primarily for digital audio bandwidth applications requiring a single ⑤ V power supply. Each single-ended channel consists of a fourth-order one-bit noise shaping modulator and a digital decimation filter. An on-chip voltage reference, stable over temperature and time, defines the full-scale range for both channels. Digital output data from both channels are time-multiplexed to a single, flexible serial interface. The AD①⑧⑦⓪ accepts a ②⑤⑥ x fS or a ③⑧④ x fS input clock (fS is the sampling frequency) and operates in both serial port master and slave modes. In slave mode, all clocks must be externally derived from a common source.

The AD⑧①⑨⑦B is an HDMI/DVI switch featuring equalized TMDS inputs and pre-emphasized TMDS outputs, ideal for systems with long cable runs. The AD⑧①⑨⑦B offers individual control of the on/off state of the TMDS input termination resistors via I②C control. Outputs can be set to a high impedance state to reduce the power dissipation and/or to allow the construction of larger arrays using the wire-OR technique.

The AD⑦⑧①③ is a high speed, microprocessor-compatible, ⑧-/①⓪-bit analog-to-digital converter with a maximum through-put of ④⓪⓪ kSPS. The converter operates off a single +②.⑦ V to +⑤.⑤ V supply and contains a ②.③ ms successive approximation A/D converter, track/hold circuitry, on-chip clock oscillator and ⑧-bit wide parallel interface. The parallel interface is designed to allow easy interfacing to microprocessors and DSPs. The ①⓪-bit conversion result is read by carrying out two ⑧-bit read operations. The first read operation accesses the ⑧ MSBs of the ADC conversion result and the second read accesses the ② LSBs. Using only address decoding logic the AD⑦⑧①③ is easily mapped into the microprocessor address space.

The AD⑨⑤①④ features a multi-output clock distribution IC in a design that emphasizes low jitter and phase noise to maximize data converter performance. Other applications with demanding phase noise and jitter requirements also benefit from this part.

The CMP④⓪① and CMP④⓪② are 23 ns and ⑥⑤ ns quad comparators with separate input and output supplies. Separate supplies enable the input stage to be operated from +③ volts to as high as ⑥ volts. The output can be supplied with either +③ volts or +⑤ volts as determined by the interface logic or available supplies. Independent input and output supplies combined with fast propagation make the CMP④⓪① and CMP④⓪② excellent choices for interfacing to portable instrumentation.

The AD⑤③⓪⑧/AD⑤③①⑧/AD⑤③②⑧ are octal ⑧-, ①⓪-, and ①②-bit buffered voltage output DACs in a ①⑥-lead TSSOP. They operate from a single 2.5 V to ⑤.⑤ V supply, consuming ⓪.⑦ mA typical at ③ V. Their on-chip output amplifiers allow the outputs to swing rail-to-rail with a slew rate of ⓪.⑦ V/s. The AD⑤③⓪⑧/ AD⑤③①⑧/AD⑤③②⑧ use a versatile ③-wire serial interface that operates at clock rates up to ③⓪ MHz and is compatible with standard SPI, QSPI, MICROWIRE, and DSP interface standards.