ltc2633-lz8 Linear Technology Corporation, ltc2633-lz8 Datasheet

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ltc2633-lz8

Manufacturer Part Number
ltc2633-lz8
Description
Dual 12-/10-/8-bit I2c Vout Dacs With 10ppm/?c Reference
Manufacturer
Linear Technology Corporation
Datasheet
Features
applications
Block Diagram
n
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n
n
n
n
n
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n
n
GND
V
V
CA0
Integrated Precision Reference
2.5V Full-Scale 10ppm/°C (LTC2633-L)
4.096V Full-Scale 10ppm/°C (LTC2633-H)
Maximum INL Error: ±1LSB (LTC2633A-12)
Low Noise: 0.75mV
Guaranteed Monotonic Over –40°C to 125°C
Temperature Range
Selectable Internal or External Reference
2.7V to 5.5V Supply Range (LTC2633-L)
Low Power: 0.4mA at 3V
Power-on-Reset to Zero-Scale/Mid-Scale/Hi-Z
Double-Buffered Data Latches
8-Lead ThinSOT™ Package
Mobile Communications
Process Control and Industrial Automation
Power Supply Margining
Portable Equipment
Automotive
CC
OUTA
DAC A
POWER-ON
ADDRESS
DECODE
RESET
I
2
C
P-P
0.1Hz to 200kHz
I
2
C INTERFACE
REFERENCE
INTERNAL
DECODE LOGIC
CONTROL
SWITCH
DAC B
V
REF
V
OUTB
SDA
Description
SCL
REF
The LTC
voltage-output DACs with an integrated, high accuracy,
low drift reference in an 8-lead TSOT-23 package. It has
rail-to-rail output buffers and is guaranteed monotonic.
The LTC2633-L has a full-scale output of 2.5V, and operates
from a single 2.7V to 5.5V supply. The LTC2633-H has a
full-scale output of 4.096V, and operates from a 4.5V to
5.5V supply. Each DAC can also operate with an external
reference, which sets the full-scale output to the external
reference voltage.
These DACs communicate via a 2-wire I
serial interface. The LTC2633 operates in both the standard
mode (clock rate of 100kHz) and the fast mode (clock rate
of 400kHz). The LTC2633 incorporates a power-on reset
circuit. Options are available for reset to zero-scale, reset
to mid-scale in internal reference mode, reset to mid-scale
in external reference mode, or reset with all DAC outputs
in a high impedance state after power-up.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners. Protected by U.S. Patents including 5396245, 5859606, 6891433,
6937178, 7414561.
2633 BD
®
2633 is a family of dual 12-, 10-, and 8-bit
10ppm/°C Reference
Dual 12-/10-/8-Bit I
Integral Nonlinearity (LTC2633A-LZ12)
–1
–2
2
1
0
0
V
INTERNAL REF .
CC
= 3V
V
1024
OUT
INL Curve
CODE
2048
DACs with
3072
LTC2633
2
2633 TA01
C-compatible
4095
2
2633fb
1
C

Related parts for ltc2633-lz8

ltc2633-lz8 Summary of contents

Page 1

... TSOT-23 package. It has rail-to-rail output buffers and is guaranteed monotonic. The LTC2633-L has a full-scale output of 2.5V, and operates from a single 2.7V to 5.5V supply. The LTC2633-H has a full-scale output of 4.096V, and operates from a 4.5V to 5.5V supply. Each DAC can also operate with an external reference, which sets the full-scale output to the external reference voltage ...

Page 2

... OUTB CA0 ...................................–0.3V to Min(V REF ...................................–0.3V to Min(V Operating Temperature Range LTC2633C ................................................ 0°C to 70°C LTC2633H (Note 3) ............................ –40°C to 125°C Maximum Junction Temperature........................... 150°C Storage Temperature Range ................... –65°C to 150°C Lead Temperature (Soldering, 10 sec) .................. 300°C orDer inFormation LTC2633 TS8 – ...

Page 3

... LTFTH 2.5V • (1023/1024) LTC2633-LX10 LTFTP 2.5V • (255/256) LTC2633-LX8 LTFSZ 2.5V • (4095/4096) LTC2633-LZ12 LTFTG 2.5V • (1023/1024) LTC2633-LZ10 LTFTN 2.5V • (255/256) LTC2633-LZ8 LTFTV 2.5V • (4095/4096) LTC2633-LO12* LTFTW 2.5V • (1023/1024) LTC2633-LO10* LTFTX 2.5V • (255/256) LTC2633-LO8* LTFTF 4.096V • (4095/4096) LTC2633-HI12 LTFTM 4.096V • (1023/1024) ...

Page 4

... LTC2633 electrical characteristics temperature range, otherwise specifications are at T LTC2633-LI12/-LI10/-LI8/-LX12/-LX10/-LX8/-LZ12/-LZ10/-LZ8/-LO12/-LO10/-LO8/LTC2633A-LI12/-LX12/-LZ12/-LO12 (V SYMBOL PARAMETER CONDITIONS GE Gain Temperature V = 3V, Internal Ref. (Note 10 Coefficient C-Grade H-Grade Load Regulation Internal Ref., Mid-Scale ± ...

Page 5

... T LTC2633-LI12/-LI10/-LI8/-LX12/-LX10/-LX8/-LZ12/-LZ10/-LZ8/-LO12/-LO10/-LO8/LTC2633A-LI12/-LX12/-LZ12/-LO12 (V SYMBOL PARAMETER Digital I/O V Low Level Input Voltage IL (SDA and SCL) V High Level Input Voltage IH (SDA and SCL) V Low Level Input Voltage on CA0 ...

Page 6

... Set-Up Time for Stop Condition SU(STO) t Bus Free Time Between a Stop and Start BUF Condition electrical characteristics temperature range, otherwise specifications are at T LTC2633-HI12/-HI10/-HI8/-HZ12/-HZ10/-HZ8/LTC2633A-HI12/-HZ12 (V SYMBOL PARAMETER CONDITIONS DC Performance Resolution Monotonicity V = 5V, Internal Ref. (Note 4) CC ...

Page 7

... T LTC2633-HI12/-HI10/-HI8/-HZ12/-HZ10/-HZ8/LTC2633A-HI12/-HZ12 (V SYMBOL PARAMETER V DAC Output Span OUT PSR Power Supply Rejection I Short Circuit Output Current (Note 6) SC Sinking Sourcing Power Supply V Positive Supply Voltage CC I Supply Current (Note 7) ...

Page 8

... LTC2633 electrical characteristics temperature range, otherwise specifications are at T LTC2633-HI12/-HI10/-HI8/-HZ12/-HZ10/-HZ8/LTC2633A-HI12/-HZ12 (V SYMBOL PARAMETER C I/O Pin Capacitance IN C Capacitive Load for Each Bus Line B C External Capacitive Load on Address Pin CA0 CA0 AC Performance t Settling Time s Voltage Output Slew Rate ...

Page 9

... For 12 and linearity is defined from code 16 to code 4,095. L Note 5. Inferred from measurement at code 16 (LTC2633-12), code 4 (LTC2633-10) or code 1 (LTC2633-8), and at full scale. Note 6. This IC includes current limiting that is intended to protect the device during momentary overload conditions. Junction temperature can ...

Page 10

... LTC2633 typical perFormance characteristics LTC2633-L12 (Internal Reference 2.5V) FS Integral Nonlinearity (INL) 1 0.5 0 –0.5 –1.0 0 1024 2048 3072 CODE 2633 G01 DNL vs Temperature 1 0.5 DNL (POS) 0 DNL (NEG) –0.5 –1.0 –50 – TEMPERATURE (°C) Settling to ±1LSB Rising 9TH CLOCK OF 3RD DATA BYTE ...

Page 11

... LTC2633-H12 (Internal Reference 4.096V) FS Integral Nonlinearity (INL) 1 0.5 0 –0.5 –1.0 0 1024 2048 3072 CODE 2633 G08 DNL vs Temperature 1 0.5 DNL (POS) 0 DNL (NEG) –0.5 –1.0 –50 – TEMPERATURE (°C) Settling to ±1LSB Rising 9TH CLOCK OF SCL 3RD DATA BYTE 5V/DIV 3.8µ ...

Page 12

... 2.5V FS INTERNAL REF 0.25 0 –0.25 –0. 128 CODE LTC2633 Load Regulation (LTC2633- (LTC2633- (LTC2633- –2 –4 –6 INTERNAL REFERENCE –8 CODE = MID-SCALE –10 –30 –20 – (mA) OUT 2633 G19 12 Differential Nonlinearity (DNL) 1 ...

Page 13

... Large-Signal Response V OUT 0.5V/DIV 1/4 SCALE to 3/4 SCALE 2µs/DIV 2633 G22 Headroom at Rails vs Output Current 5.0 5V SOURCING 4.5 4.0 3.5 3V (LTC2633-L) SOURCING 3.0 2.5 2.0 1.5 5V SINKING 1.0 3V (LTC2633-L) SINKING 0 (mA) OUT 2633 G25 Supply Current vs Logic Voltage 1.2 SWEEP SDA, SCL BETWEEN ON AND V CC 1.0 0.8 0.6 ...

Page 14

... V ) where the voltage supplied sets the full-scale REF CC DAC output voltage. When internal reference is selected, the 10ppm/°C 1.25V (LTC2633-L) or 2.048V (LTC2633-H) internal reference (half full-scale) is available at the pin. This output may be bypassed to GND with up to 10µF 14 Noise Voltage vs Frequency ...

Page 15

... DATA BYTE 2ND DATA BYTE ACK Figure 2. Typical LTC2633 Write Transaction LTC2633 REF SWITCH V REF V OUTB DAC B SCL SDA 2633 BD Test Circuit INH INL/ INF CA0 2633 TC02 ...

Page 16

... LTC2633 operation The LTC2633 is a family of dual voltage output DACs in an 8-lead TSOT package. Each DAC can operate rail-to-rail using an external reference, or with its full-scale voltage set by an integrated reference. Eighteen combinations of accuracy (12-, 10-, and 8-bit), power-on reset value (zero- ...

Page 17

... SDA bus line during the ACK clock pulse so that it remains a stable LOW during the HIGH period of this clock pulse. The LTC2633 responds to a write by a master in this manner but does not acknowledge a read operation; in that case, SDA is retained HIGH during the period of the ACK clock pulse ...

Page 18

... DAC address. The next two bytes contain the 16-bit data word, which consists of the 12-, 10- or 8-bit input code, MSB to LSB, followed don’t-care bits (LTC2633-12, LTC2633-10 and LTC2633-8 respectively). A typical LTC2633 write transaction is shown in Figure 4. ...

Page 19

... LTC2633 2633fb 19 ...

Page 20

... LTC2633-LX. The reference mode of LTC2633-HZ/LTC2633-LZ/ LTC2633-HI/LTC2633-LI/LTC2633-LO (internal reference power-on default), can be changed by software command after power up. The same is true for LTC2633-LX (external reference power-on default). Power-Down Mode For power-constrained applications, power-down mode can be used to reduce the supply current whenever less than two DAC outputs are needed ...

Page 21

... DACs will also power up the integrated reference. Voltage Output The LTC2633’s integrated rail-to-rail amplifier has guaran- teed load regulation when sourcing or sinking up to 10mA at 5V, and 5mA at 3V. Load regulation is a measure of the amplifier’s ability to maintain the rated voltage accuracy over a wide range of load current ...

Page 22

... The resistance from the LTC2633 GND pin to the ground plane should be as low as possible. Resistance here will add directly to the effective DC output impedance of the device (typically 0.1Ω ...

Page 23

... Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. LTC2633 PAGE NUMBER 13, 16, ...

Page 24

... LTC2633 typical application Voltage Margining Application with LTC3850 (1.2V ±5%) LTC2633-LO Option Only REF V CC 0.1µF LTC2633CTS8-L012 10k 5 6 DAC A DAC B 2 CA0 1 4 SCL GND BUS 8 SDA relateD parts PART NUMBER DESCRIPTION LTC2632 Dual 12-/10-/8-Bit, SPI V OUT Internal Reference ...

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