TLV1548I
TLV1548I is LOW-VOLTAGE 10-BIT ANALOG-TO-DIGITAL CONVERTERS manufactured by Texas Instruments.
- Part of the TLV1544 comparator family.
- Part of the TLV1544 comparator family.
ion
The TLV1544 and TLV1548 are CMOS 10-bit switched-capacitor successive-approximation (SAR) analog-to-digital (A/D) converters. Each device has a chip select (CS), input-output clock (I/O CLK), data input (DATA IN) and serial data output (DATA OUT) that provide a direct 4-wire synchronous serial peripheral interface (SPI™, QSPI™) port of a host microprocessor. When interfacing with a TMS320 DSP, an additional frame sync signal (FS) indicates the start of a serial data frame. The devices allow high-speed data transfers from the host. The INV CLK input provides further timing flexibility for the serial interface.
DATA OUT DATA IN I/O CLK EOC VCC A0 A1 A2
A0 A1 A2 A3 A4 A5 A6 A7 CSTART GND
D OR PW PACKAGE (TOP VIEW)
DB OR J PACKAGE (TOP VIEW)
FK PACKAGE (TOP VIEW)
CS REF+ REF- FS INV CLK GND CSTART A3
VCC EOC I/O CLK DATA IN DATA OUT CS REF+ REF- FS INV CLK
A2 A1 A0 VCC EOC
3 2 1 20 19
A3 4
18 I/O CLK
A4 5
17 DATA IN
A5 6
16 DATA OUT
A6 7
15 CS
A7 8
14 REF+
9 10 11 12 13
CSTART GND
INV CLK FS
REF-
In addition to a high-speed converter and versatile control capability, the device has an on-chip 11-channel multiplexer that can select any one of eight analog inputs or any one of three internal self-test voltages. The sample-and-hold function is automatic except for the extended sampling cycle, where the sampling cycle is started by the falling edge of asynchronous CSTART. At the end of the A/D conversion, the end-of-conversion (EOC) output goes high to indicate that the conversion is plete. The TLV1544 and TLV1548 are designed to operate with a wide range of supply voltages with very low power consumption. The power saving feature is further enhanced with a software-programmed power-down mode and conversion rate. The converter incorporated in the device Features differential high-impedance reference inputs that facilitate...
