LTC1655L DACs Datasheet

LTC1655L Datasheet PDF, Equivalent


Part Number

LTC1655L

Description

16-Bit Rail-to-Rail Micropower DACs

Manufacture

Linear

Total Page 16 Pages
PDF Download
Download LTC1655L Datasheet PDF


LTC1655L
FEATURES
s 16-Bit Monotonicity Over Temperature
s Deglitched Rail-to-Rail Voltage Output
s SO-8 Package
s ICC(TYP): 600µA
s Internal Reference: 2.048V (LTC1655)
1.25V (LTC1655L)
s Maximum DNL Error: ±1LSB
s Settling Time: 20µS to ±1LSB
s 750kHz Max Update Rate
s Power-On Reset to Zero Volts
s 3-Wire Cascadable Serial Interface
s Low Cost
s Pin Compatible Upgrade for LTC1451 12-Bit DAC
Family
U
APPLICATIO S
s Digital Calibration
s Industrial Process Control
s Automatic Test Equipment
s Cellular Telephones
W
FU CTIO AL BLOCK DIAGRA
LTC1655/LTC1655L
16-Bit Rail-to-Rail
Micropower DACs in
SO-8 Package
DESCRIPTIO
The LTC®1655/LTC1655L are rail-to-rail voltage output,
16-bit digital-to-analog converters in an SO-8 package.
They include an output buffer and a reference. The 3-wire
serial interface is compatible with SPI/QSPI and
MICROWIRETM protocols. The CLK input has a Schmitt
trigger that allows direct optocoupler interface.
The LTC1655 has an onboard 2.048V reference that can be
overdriven to a higher voltage. The output swings from 0V
to 4.096V when using the internal reference. The typical
power dissipation is 3.0mW on a single 5V supply.
The LTC1655L has an onboard 1.25V reference that can be
overdriven to a higher voltage. The output swings from 0V
to 2.5V when using the internal reference. The typical
power dissipation is 1.8mW on a single 3V supply.
The LTC1655/LTC1655L are pin compatible with Linear
Technology’s 12-bit VOUT DAC family, allowing an easy
upgrade path. They are the only buffered 16-bit DACs in
an SO-8 package and they include an onboard reference
for standalone performance.
, LTC and LT are registered trademarks of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
Functional Block Diagram: 16-Bit Rail-to-Rail DAC
LTC1655: 4.5V TO 5.5V
LTC1655L: 2.7V TO 5.5V
8
LTC1655: 2.048V
LTC1655L: 1.25V
6
2 DIN
VCC
REF
REF
1 CLK
16-BIT 16
µP SHIFT
3 CS/LD REG
AND
DAC
LATCH
4 DOUT
16-BIT
DAC
+
VOUT 7
TO
OTHER
DACS
POWER-ON
RESET
GND
5
1655/55L TA01
1.0
0.8
0.6
0.4
0.2
0
– 0.2
– 0.4
– 0.6
– 0.8
– 1.0
0
Differential Nonlinearity
vs Input Code
16384
32768
CODE
49152 65535
1655/55L TA02
1

LTC1655L
LTC1655/LTC1655L
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VCC to GND .............................................. – 0.5V to 7.5V
TTL Input Voltage .................................... – 0.5V to 7.5V
VOUT, REF ....................................... – 0.5V to VCC + 0.5V
Maximum Junction Temperature ......................... 125°C
Operating Temperature Range
LTC1655C/LTC1655LC ........................... 0°C to 70°C
LTC1655I/LTC1655LI ........................ – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
CLK 1
DIN 2
CS/LD 3
DOUT 4
8 VCC
7 VOUT
6 REF
5 GND
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 100°C/W (N8)
TJMAX = 125°C, θJA = 150°C/W (S8)
Consult factory for Military grade parts.
ORDER PART
NUMBER
LTC1655CN8
LTC1655IN8
LTC1655CS8
LTC1655IS8
LTC1655LCN8
LTC1655LIN8
LTC1655LCS8
LTC1655LIS8
S8 PART MARKING
1655
1655I
1655L
1655LI
ELECTRICAL CHARACTERISTICS
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
VCC = 4.5V to 5.5V (LTC1655), VCC = 2.7V to 5.5V (LTC1655L); VOUT unloaded, REF unloaded, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
DAC
Resolution
q 16
Bits
Monotonicity
q 16
Bits
DNL Differential Nonlinearity
INL Integral Nonlinearity
ZSE Zero Scale Error
Guaranteed Monotonic (Note 2)
LTC1655, REF = 2.2V, VCC = 5V (Note 8) (External) q
LTC1655L, REF = 2.2V, VCC = 5V (Note 8) (External) q
±0.3 ±1.0
±0.5 ±1.0
LTC1655, REF = 2.2V, VCC = 5V (Note 8) (External) q
LTC1655L, REF = 2.2V, VCC = 5V (Note 8) (External) q
±8 ±20
±8 ±20
LTC1655
q0
3.0
LTC1655L
q0
3.5
LSB
LSB
LSB
LSB
mV
mV
VOS Offset Error
VOSTC
Offset Error Tempco
Gain Error
Gain Error Drift
Measured at Code 200
LTC1655, REF = 2.2V, VCC = 5V (Note 8) (External) q
LTC1655L, REF = 1.3V, VCC = 2.7V (Note 8) (External) q
REF = 2.2V (External), VCC = 5V (Note 8)
q
±0.5 ±3.0
±0.5 ±3.5
±5
±5 ±16
0.5
mV
mV
µV/°C
LSB
ppm/°C
Power Supply
VCC Positive Supply Voltage
For Specified Performance
LTC1655
LTC1655L
q 4.5
q 2.7
5.5 V
5.5 V
ICC Supply Current
(Note 3)
q
600 1200
µA
2


Features UU U FEATURES s 16-Bit Monotonicity Ove r Temperature s Deglitched Rail-to-Rail Voltage Output s SO-8 Package s ICC(TY P): 600µA s Internal Reference: 2.048V (LTC1655) 1.25V (LTC1655L) s Maximum D NL Error: ±1LSB s Settling Time: 20µS to ±1LSB s 750kHz Max Update Rate s P ower-On Reset to Zero Volts s 3-Wire Ca scadable Serial Interface s Low Cost s Pin Compatible Upgrade for LTC1451 12-B it DAC Family U APPLICATIO S s Digital Calibration s Industrial Process Contro l s Automatic Test Equipment s Cellular Telephones W FU CTIO AL BLOCK DIAGRA LTC1655/LTC1655L 16-Bit Rail-to-Rail Mi cropower DACs in SO-8 Package DESCRIPTI O The LTC®1655/LTC1655L are rail-to-ra il voltage output, 16-bit digital-to-an alog converters in an SO-8 package. The y include an output buffer and a refere nce. The 3-wire serial interface is com patible with SPI/QSPI and MICROWIRETM p rotocols. The CLK input has a Schmitt t rigger that allows direct optocoupler i nterface. The LTC1655 has an onboard 2.048V reference that can be ov.
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