Five-function memory card interface
28 November 2007
Analogue, Mixed Signal, LSI
New from STMicroelectronics is a tiny, highly integrated chip which provides five essential functions required by memory card interfaces in a broad range of consumer and industrial products that use removable secure digital (SD) protocol cards. The new flip-chip EMIF06-SD02F3 memory-card transceiver integrates signal conditioning, bidirectional level shifting, ESD (electrostatic discharge) protection, EMI (electromagnetic interference) filtering and a 2,9 V voltage regulator.
The chip is compliant with standard and high-speed SD standards, and with MiniSD, MMC and uSD/TransFlash. It provides a high level of ESD protection to exposed external memory card slots, efficient EMI filtering to protect data lines against RF interference, and pull-up and pull-down resistors to prevent floating data lines. ESD protection on the card-side pins meets the stringent IEC61000-4-2 Level 4 standard, 15 kV air discharge. The 800 MHz to 3 GHz EMI filter achieves over 20 dB attenuation at 1 GHz.
In addition, six high-speed bidirectional level shifters, designed for 50 MHz operation and with 3 ns typical propagation delay, enable the interfacing of 2,9 V memory cards with 1,8 V host processors. A maximum channel-to-channel skew of 1,5 ns ensures data transmission integrity, and the drivers are optimised for low-power applications with quiescent off-current of 1 μA.
Power for the memory card is provided through an on-chip 2,9 V low drop-out (LDO) CMOS voltage regulator, with 200 mA current capability and an input voltage range of 3,1 V to 5 V. The drop-out voltage is 100 mV maximum with a 200 mA load. A switch-off control pin, with fast 30 μs turn-on time, helps minimise a product's power consumption and extend battery life, and the regulator includes thermal shut-down, under-voltage lock-out and short-circuit protection.
Further reading:
High-speed PIN diode
Altron Arrow
Analogue, Mixed Signal, LSI
Vishay’s new high-speed Silicon PIN diode is able to detect both visible and near infra-red radiation over a wide spectrum range from 350 to 1100 nm.
Read more...
Analogue front end for sensor measurements
Electrocomp
Analogue, Mixed Signal, LSI
The NJU9103 AFE from Nisshinbo is a tiny analogue front end, with a 16-bit resolution ADC and up to 512 x signal amplification from the programmable gain amplifier.
Read more...
Single-channel software configurable I/O
Altron Arrow
Analogue, Mixed Signal, LSI
These use cases of the AD74115H include analogue output and input, digital output and input, resistance temperature detector (RTD), and thermocouple measurement capability.
Read more...
Current-sense amplifier with PWM rejection
Altron Arrow
Analogue, Mixed Signal, LSI
Analog Devices’ AD8410A is a high voltage, high bandwidth current-sense amplifier that features an initial gain of 20 V/V and a 2,2 MHz bandwidth.
Read more...
Combining a LPF and ADC driver for a 20 Vp-p signal
Altron Arrow
Analogue, Mixed Signal, LSI
A mixed-signal ADC driver circuit’s optimum performance depends on multiple variables: the driver’s settling time, the RC filter’s time constant, driving impedance, and the ADC sampling capacitor’s kickback current, all interact during acquisition time and contribute towards sampling errors.
Read more...
Pressure sensor with NextNav certification
EBV Electrolink
Analogue, Mixed Signal, LSI
STMicroelectronics’ LPS22DF pressure sensor has received a NextNav certification, which guarantees performance and reliability for geolocation and other types of applications.
Read more...
Reference design for Raspberry Pi analogue I/O
Analogue, Mixed Signal, LSI
Analogue Devices has published a reference design for ±10 V analogue input and ±15 V analogue output for Raspberry Pi platforms.
Read more...
Multi-zone distance sensor with 90° field of view
Avnet Silica
Analogue, Mixed Signal, LSI
STMicroelectronics has revealed a new FlightSense multi-zone distance sensor, with 90° field of view, to bring lifelike situational awareness to applications like home automation, computers, robots, and smart equipment.
Read more...
Six-axis IMU with Qvar sensing channel
Altron Arrow
Analogue, Mixed Signal, LSI
The LSM6DSV16X from STMicroelectronics is a high-performance, low-power six-axis IMU, featuring a three-axis digital accelerometer and a three-axis digital gyroscope.
Read more...
Bidirectional current-sense amplifier with PWM
RS South Africa
Analogue, Mixed Signal, LSI
The MAX49925 from Analogue Devices is a bidirectional current-sense amplifier (CSA) with an input common-mode range that extends from -40 to 76 V, making it suitable for 48 V HEV applications where there are large automotive transients.
Read more...
printer friendly version