TSC2008-Q1 Texas instruments

TSC2008-Q1

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TSC2008-Q1

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Описание

The TSC2008-Q1 is a very low-power touch screen controller designed to work with power-sensitive, handheld applications that are based on advanced low-voltage processors. It works with a supply voltage as low as 1.2V, which can be supplied by a single-cell battery. It contains a complete, ultra-low power, 12-bit, analog-to-digital (A/D) resistive touch screen converter, including drivers and the control logic to measure touch pressure. In addition to these standard features, the TSC2008-Q1 offers preprocessing of the touch screen measurements to reduce bus loading, thus reducing the consumption of host processor resources that can then be redirected to more critical functions. The TSC2008-Q1 supports an SPI serial bus and data transmission. It offers programmable resolution of 8 or 12 bits to accommodate different screen sizes and performance needs. The TSC2008-Q1 is available in a 16-pin, 4 x 4 QFN package. The TSC2008-Q1 is characterized for the –40°C to +105°C industrial temperature range.

Qualified for Automotive Applications
4-Wire Touch Screen Interface
Single 1.2V to 3.6V Supply/Reference
Ratiometric Conversion
Effective Throughput Rate:
- Up to 20kHz (8-Bit) or 10kHz (12-Bit)
Preprocessing to Reduce Bus Activity
High-Speed SPI (up to 25MHz)
Simple Command-Based User Interface:
- TSC2046 Compatible
- 8- or 12-Bit Resolution
On-Chip Temperature Measurement
Touch Pressure Measurement
Digital Buffered PENIRQ
On-Chip, Programmable PENIRQ Pull-up
Auto Power-Down Control
Low Power (12-Bit, 8.2kHz Eq Rate):
- 30.4µA at 1.2V, f_SCLK = 5MHz
- 35.5µA at 1.8V, f_SCLK = 10MHz
- 44.6µA at 2.7V, f_SCLK = 10MHz
Power-On, Software, and SureSet Resets
Enhanced ESD Protection:
- ±8kV HBM
- ±1kV CDM
- ±25kV Air Gap Discharge
- ±15kV Contact Discharge
Latch-Up Exceeds 100 mA per JESD78B - Class I
4 x 4 QFN-16 PackageU.S. Patent No. 6246394; other patents pending.
APPLICATIONS
- Multi-Screen Touch Control Systems

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SAR ADC resolution (Bits)	12
SAR sample rate (max) (ksps)	200
Touch panel	4-Wire
Control interface	SPI
Vref (int/ext)	External
Rating	Automotive
Operating temperature range (°C)	-40 to 105
Analog supply (min) (V)	1.2
Analog supply (max) (V)	3.6
I/O supply voltage (min) (V)	1.2
I/O supply voltage (max) (V)	3.6
Input type	Single-ended