R2A20178NP_15 Datasheet, PDF (1/8 Pages) Renesas Technology Corp – 8-bit 8ch Multiplying D/A Converter with Buffer Amplifiers

New Product
R2A20178NP
8-bit 8ch Multiplying D/A Converter with Buffer Amplifiers
R03DS0021EJ0100
Rev.1.00
2011.09.05
Description
The R2A20178 is a CMOS 8-bit 8ch D/A converter having a multiplying function and output buffer amplifiers.
It has a serial data input and can easily communicate with a microcontroller by simple three-wiring method
(DI, CLK, LD), and it is suitable for a use in automatic adjustment applications in conjunction with a MCU.
The reference voltage terminals (VDAref1, VDAref2) are 4ch x 2 configuration, and the 4 quadrant operation is
possible.
Features
 Guarantee Nonlinearity error : +/-1.0LSB, Differential nonlinearity error : +/-0.7LSB
 Three-wiring serial data transmission
 High performance 8ch D/A converter employing an R-2R with higher-order segment method
 8 buffer amplifiers operating in a whole supply voltage range from VDD to GND
 High anti-oscillation stability for capacitive loads
 4 quadrant multiplication
 Very small package : QFN (pin pitch 0.5mm)
Application
 Digital to analog conversion for consumer and industrial equipment.
 Self adjustment by combination with microcomputer and EEPROM (substitution of half fixed resistance)
 Signal gain control or automatic adjustment of LCD-TV, PDP-TV or LCD display-monitor.
 Voltage control of transmission power amplifier of transceiver
Block Diagram
V^DD
2
DI 5
CLK ⁴
12-bit shift register
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11
Address decoder
3 LD
RESET 16
VDAref1 ¹⁴
8-bit Latch
8-bit Latch
D/A converter
D/A converter
ch2 ch3 ch4 ch5 ch6 ch7
15 _VDAref2
22
VIN1
23
VOUT1
R03DS0021EJ0100 Rev.1.00
2011.09.05
21
VIN8
20
VOUT8
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