LTC1428-50 Linear Technology, LTC1428-50 Datasheet
LTC1428-50
Related parts for LTC1428-50
LTC1428-50 Summary of contents
Page 1
... CS signal level. In 3-wire mode, the system MPU can serially transfer 8-bit data to and from the LTC1428-50. In pulse mode, the upper six bits of the DAC output program for increment- only (1-wire interface) or increment/decrement (2-wire ...
Page 2
... LTC1428- ABSOLUTE MAXIMUM (Note 1) Supply Voltage (V ) ................................................ 7V CC Input Voltage (All Inputs)............ – 0. Output Voltage I ...................................................... – 0.3V to 10V OUT D ....................................... – 0. OUT Short-Circuit Duration (All Outputs) ............... Indefinite Operating Temperature Range .................... Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec).................. 300 C ...
Page 3
... Note 4: This is the minimum time required for valid data transfer. INL vs Code 1 3.3V CC 0.8 V 2.5V OUT 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1 128 160 192 224 256 CODE 1428-50 G02 LTC1428-50 MIN TYP MAX UNITS 2 MHz 150 ns 400 ns 150 ns 150 ns 150 ns 150 ns 200 ns 250 ns 150 ns 400 ns 400 ns 4550 ...
Page 4
... The digital setting for the DAC is retained. CLK (Pin 4): Shift Clock. This clock synchronizes the serial data and has a Schmitt trigger input. CS (Pin 5): Chip Select Input. In 3-wire mode, a logic low enables the LTC1428-50. Upon power-up, a logic high 4 Bias Voltage Rejection 2 0. ...
Page 5
... WAVEFORM 2 (SEE NOTE 2) NOTE 1: WAVEFORM 1 IS FOR AN OUTPUT WITH INTERNAL CONDITIONS SUCH THAT THE OUTPUT IS HIGH UNLESS DISABLED BY CS NOTE 2: WAVEFORM 2 IS FOR AN OUTPUT WITH INTERNAL CONDITIONS SUCH THAT THE OUTPUT IS LOW UNLESS DISABLED BY CS LTC1428-50 8-BIT CURRENT I OUT DAC ...
Page 6
... CS and UP/DN will always remain high. 2-wire pulse mode systems must provide a single logic low pulse before the first data pulses are sent to prevent the LTC1428-50 from remaining in 1-wire mode if the first several pulses are logic high. Standard 3-Wire Mode (Figure 3) Refer to the Serial Interface Operating Sequence in Figure 1 ...
Page 7
... The last two LSBs are always zero in pulse mode ( 0)I OUT To configure the LTC1428-50 in 2-wire pulse mode, tie and bring the UP/DN pin low at least once during CC power-up. 8 ...
Page 8
... BAT 7.5V V 24V BAT + IN STEPS OF 65mV + OUT OUT LTC1428- (e.g., 8051) SHDN GND 5 4 CLK CS P1.2 P1.1 P1.0 1428-50 TA03 0.189 – 0.197* (4.801 – 5.004 0.150 – 0.157** 0.228 – 0.244 (3.810 – 3.988) SO8 0996 ...