LTC1329-50 Linear Technology Corporation, LTC1329-50 Datasheet

no-image

LTC1329-50

Manufacturer Part Number
LTC1329-50
Description
Ltc1329-50 - Micropower 8-bit Current Output D/a Converter
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
APPLICATIONS
TYPICAL
Guaranteed Precision Full-Scale DAC Output
Current at 25 C:
Wide Output Voltage DC Compliance: – 15V to 2.5V
Wide Supply Range: 2.7V V
Supply Current in Shutdown: 0.2 A
Low Supply Current: 75 A for LTC1329-10,
95 A for LTC1329-50/LTC1329A-50
Available in 8-Pin SO
Triple Mode
1. Standard 3-Wire Mode
2. Pulse Mode 1-Wire Interface: Increment-Only
3. Pulse Mode 2-Wire Interface: Increment/Decrement
Can Read Back the 8-Bit DAC Value in 3-Wire Mode
DAC Powers Up at Midrange
DAC Contents Are Retained in Shutdown
LCD Contrast Control
Backlight Brightness Control
Battery Charger Current/Voltage Adjustment
Power Supply Voltage Adjustment
Trimmer Pot Elimination
LTC1329A-50
LTC1329-10
LTC1329-50
V
5V
*GOWANDA GA10-103K OR
IN
COILTRONICS CTX100-4
+
APPLICATION
TM
47 F
Interface Modes
U
GND
50 A 1%
10 A 3%
50 A 3%
I
LIM
LT
47
®
1173
SW2
V
SW1
IN
FB
CC
U
1N5818
100 H
L1*
6.5V
+
Digitally Controlled LCD Bias Generator
4.7 F
1N4148
1N5818
+
10.1k
200k
22 F
DESCRIPTION
The LTC
micropower 8-bit current output D/A converters (DACs)
with an output range of 0 A to 10 A for the LTC1329-10
and 0 A to 50 A for the LTC1329-50/LTC1329A-50. The
DAC current output can be biased from – 15V to 2V or
– 15V to 2.5V in 3.3V and 5V systems, respectively. Supply
current is only 95 A for the LTC1329-50/LTC1329A-50
and 75 A for LTC1329-10. A shutdown mode drops the
supply current to 0.2 A.
The LTC1329 can communicate with external circuitry by
using one of three interface modes: standard 3-wire serial
mode and two pulse modes. Upon power-up, the internal
counter resets to 1000 0000B, the DAC output assumes
midrange and the chip is configured in 3-wire or pulse
mode depending on the signal level at CS.
In 3-wire mode, the system MPU can serially transfer 8-bit
data to and from the LTC1329. In pulse mode, the upper
six bits of the DAC output can be programmed for incre-
ment-only (1-wire interface) or increment/decrement
(2-wire interface) operation depending on the signal level
at D
LTC1329 is available in 8-pin SO packages.
Triple Mode is a trademark of Linear Technology Corporation.
220k
, LTC and LT are registered trademarks of Linear Technology Corporation.
0.1 F
Micropower 8-Bit Current
IN
.
V
–22V at 40mA
OUT
Output D/A Converter
®
1329-10/LTC1329-50/LTC1329A-50 are
LTC1329-50/LTC1329A-50
1
2
3
4
I
V
SHDN
CLK
OUT
CC
LTC1329-50
U
D
GND
OUT
D
CS
IN
6
5
8
7
LTC1329-10/
P1.2
P1.1
P1.0
(e.g., 8051)
MPU
1329 TA01
1

Related parts for LTC1329-50

LTC1329-50 Summary of contents

Page 1

... The LTC micropower 8-bit current output D/A converters (DACs) with an output range for the LTC1329-10 and for the LTC1329-50/LTC1329A-50. The DAC current output can be biased from – 15V – 15V to 2.5V in 3.3V and 5V systems, respectively. Supply current is only 95 A for the LTC1329-50/LTC1329A-50 6 ...

Page 2

... CONDITIONS Supply Current V CC SHDN D OUT Shutdown DAC Resolution DAC Full-Scale Current Output Voltage at I (LTC1329-10, LTC1329-50) Output Voltage at I (LTC1329A-50) DAC Zero-Scale Current Output Voltage at I DAC Differential Monotonicity Guaranteed Nonlinearity Supply Voltage Rejection 5.5V Output Voltage ...

Page 3

... 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 ns 400 ns 400 ns LTC1329-50 DNL vs Code 1 0 3. 0.45V 0.6 OUT 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 192 224 256 128 160 CODE 1392 G03 3 ...

Page 4

... LTC1329-10/ LTC1329-50/LTC1329A- TYPICAL PERFORMANCE CHARACTERISTICS LTC1329-50 INL vs Code 1 0 3. 0.45V 0.6 OUT 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0 192 224 256 128 160 CODE 1329 • TPC04 LTC1329-10/LTC1329-50 Bias Voltage Rejection (Full-Scale Current 3.3V CC 0.3 0.2 0.1 LTC1329-50 ...

Page 5

... CONTROL 8 LOGIC CLK 9-BIT SHIFT REGISTER 2.4V D 0.4V OUT SET HIGH 1329 TC03 D OUT SET LOW DO LTC1329-10/ LTC1329-50/LTC1329A-50 serially outputs the previous 8-bit DAC OUT is three-stated. OUT V CC 8-BIT CURRENT I OUT DAC OUT OUT 1329 BD Voltage Waveforms for t ...

Page 6

... A full scale and two accuracy grades room temperature ( 2% over temperature) for the LTC1329A-50 and 3% at room temperature ( 5% over temperature) for the LTC1329-50. All versions include a flexible serial digital interface which allows easy intercon- nection to a variety of digital systems. ...

Page 7

... Standard 3-Wire Mode (Figure 3) Refer to the Serial Interface Operating Sequence in Figure 1. When operating in 3-wire mode, the LTC1329-10/ LTC1329-50/LTC1329A-50 will interface directly with most standard 3- or 4-wire serial interface systems. The clock (CLK) input synchronizes the data transfer with each input ...

Page 8

... SO8 0996 8 D OUT GND 2.5V 1329 TA02 OUT OUT MPU LTC1329-50 (e.g., 8051 SHDN GND 4 5 CLK CS P1.2 P1.1 P1.0 1329 TA03 1329f LT/TP 0297 5K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1997 ...

Related keywords