Sensors & MEMs
Expertise
At CSS, we are the ASIC experts. Our world-class ASIC designers have a wealth of experience creating custom integrated circuits.
Advanced electrical interfaces to real-world sensors and transducers
- Resistive, capacitive, inductive, and magnetic sensor interfaces
- High-performance Analog Front-Ends (AFEs) and analog signal processing
- Offset, gain, and tempco compensation via production test trimming
- Low-noise design via chopping and correlated double sampling (CDS)
- Programmable and variable gain amplifiers
- Passive and active low-pass, high-pass, and bandpass filters
- Custom-built and optimized CMOS Image Sensors
- Tempco cancellation for bandgaps, current references, and oscillators
- On-chip temperature sensors and PTAT biases (proportional to absolute temperature)
- Processes: 28/65/180/250/350/500nm CMOS; 180/350 BCD; 180nm CMOS Image Sensor (CIS)
ASIC Design Expertise
CSS has designed scores of innovative and high-performance microchips in a wide variety of CMOS, BCD, SiGe, SOI, and CIS process technologies in geometries ranging from 28nm to 500nm. In fact, our engineers have an average of over 30 years of design experience focusing on high-voltage, ultra-low power, precision analog and data converters, sensors and MEMs interfacing, and wireless communications. Such ASIC design expertise is unmatched in the industry.
IP Blocks
- 16-bit, 3rdOrder Sigma Delta ADC (16 MSPS core modulator with interpolation/decimation to 1MSPS; 200kHz signal BW)
- 14-bit SAR ADC (self-calibration, ULP, 100 kSPS, 0.1% INL, 2 LSB DNL)
- 10-bit SAR ADC with 22-channel Analog MUX
- 16-bit 3rdOrder Sigma Delta DAC (16 MSPS modulator, up to 2nd order interpolation from 1MSPS interface)
- 12-bit 4V DAC with 40V buffer (148 channels, <2us settling, 1 LSB INL)
- 0-2A, 10-bit DAC with ½ bit INL and ¼ bit DNL
- 8-bit offset adjust DAC
- 8GHz Receiver with low BW detector
- 8GHz Transmitter (output power settable range -30 to -10 dBm)
- 8GHz Transceiver with measured image rejection < -25dBm;
- Variable transconductance amplifier, Fin < 5 GHz
- Upconvert Mixer: RF 10-100GHz; IF 500MHz
- Frequency doubler, 5GHz <= Fin <= 20GHz
- 1 -> 8 Distribution Amp, 40GHz
- Clocked comparator, 20GHz clock
- Distributed LNA, 5GHz <+ Fin <= 45GHz
- DC to 30GHz regenerative divider
- Harmonic Mixer: Fin 46GHz, 10GHz <= Fref <= 22.6GHz
- Transmit Data Interface: 500MHz data, 1GHz clock
- 10-40GHz active balun
- 45GHz mmWave frontend
- Baseband convertor with 20 GHz clock
- Antenna reflectivity modulator
- RF power recovery unit for battery-free biomedical device
- Ultra-low power, 450kHz FM signal generator
- General Purpose Amplifiers
- Temperature range: -55C to +150C
- Supply range: 1.2V to 48V
- Bandwidth: 100KHz to 100MHz
- Open-loop gain: +65dB to +140db
- Class AB Output Amplifier (1kOhm & 50pF load)
- Rail-to-Rail Amplifiers
- Trans Impedance Amplifiers (TIA)
- 200 kHz signal BW and 70+dB SNDR
- Low Noise Amplifiers (LNA)
- High-Voltage Amplifiers
- Adjustable Gain Amplifiers (VGA & PGA)
- Rail-to-Rail, High-speed & Low-power Comparators
- Comparators with Hysteresis
- Latched Comparators
- 8-channel 100V Output driver for MEMs device
- Adjustable 70-100V Voltage Regulator
- 36V Switch Array for universal I/O device
- 16-32V LDO Regulator
- 100V Charge Pump (5V input supply)
- 1-wire multi-level HV power and communication interface (15V)
- 4-channel, 16-32V MEMs drivers
- +/- 18V 10-bit Current DAC
- 1A, 15V drivers for heating elements in thermal controller
- 45V drivers for piezoelectric transducers
- 18V transmit amps for 0-135kHz signal
- 0-40V DAC and Driver with 12-bit resolution
- 20V Charge Pump (1.3V input supply)
- 20V Antenna driver for wireless biometric device
- SPI, QSPI, I2C, & UART
- RS232 & RS485
- Single-Wire CAN (SAE J2411)
- Dual-Wire CAN (ISO 11898)
- K-line & L-line (ISO9141 & ISO14230)
- SAE J1850 & J1708
- ISO-Transport Layer (ISO 15765)
- SAE J1939
- Boost/Buck Switching Voltage Regulator
- Various LDOs (Plus, Minus, Fixed, Adjustable, etc.)
- Bandgap Voltage References
- Buffered & Unbuffered
- Chopper stabilized
- Trimmed & Untrimmed
- 25ppm – 100ppm/degC Tempco Stability
- Low Power (< 5uA)
- Compact (<50uA)
- PTAT Current References
- Integrated Current References
- +/-15% untrimmed
- +/- 1% trimmed
- Precision Current Reference (External resistor)
- 32kHz to 7MHz XTAL oscillators
- Example: 100kHz Crystal Oscillator (<1uA active current)
- Relaxation oscillators
- From 100kHz to 75MHz
- PLLs for clock multipliers
- Up to 500MHz outputs
- 555 Timer
- World’s lowest power 555 Timer(<5uA)
- Ultra-low-power custom SRAM bit cell and macro (<1K bit to >16K bit)
- Ultra-low voltage operation.
- Static current ~0uA
- Multiple process technologies
- Easy to reconfigure
- Ultra-low-power custom ROM bit cell and macro (<1K bit to >256K bit)
- Ultra-low voltage operation.
- Static current ~0uA
- Multiple process technologies
- Easy to reconfigure
"Through many years and many custom chip developments and with integrity, commitment, innovation and support, CSS has continually demonstrated leadership in providing turnkey, mixed signal custom chips that allow Curtis Instruments to develop cost effective and market leading products."
"Itron has been very pleased with the design, project management, and implementation of the custom ASICs that CSS has developed for us. CSS is a preferred supplier and our first choice on new designs. Further, they have done an excellent job of supporting ongoing production."
"As our company has grown from implementing very basic IC designs to full system on a chip designs CSS has been supporting our needs, filling the gaps between our in-house capability and what we need to achieve production. This has ranged from design, to custom layout, to packaging, to wafer test and to database management. Throughout our evolution CSS has consistently delivered in a timely and cost effective manner."
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