Micropower DAC. LTC1657L Datasheet


LTC1657L DAC. Datasheet pdf. Equivalent


LTC1657L


Parallel 16-Bit Rail-to-Rail Micropower DAC
LTC1657/LTC1657L Parallel 16-Bit Rail-to-Rail
Micropower DAC

FEATURES
nn 16-Bit Monotonic Over Temperature nn Deglitched Rail-to-Rail Voltage Output: 8nV•s nn ICC: 650µA Typ nn Maximum DNL Error: ±1LSB nn Settling Time: 20µs to ±1LSB nn Built-In Reference:	 2.048V (LTC1657)
	 1.25V (LTC1657L) nn Internal Power-On Reset to Zero Volts nn Asynchronous CLR Pin nn Output Buffer Configurable for Gain of 1 or 2 nn Parallel 16-Bit or 2-Byte Double Buffered Interface nn Multiplying Capability nn Narrow 28-Lead SSOP Package
APPLICATIONS
nn Instrumentation nn Digital Calibration nn Industrial Process Control nn Automatic Test Equipment nn Communication Test Equipment

DESCRIPTION
The LTC®1657/LTC1657L are complete single supply, railto-rail voltage output, 16-bit digital-to-analog converters (DAC) in a 28-pin SSOP package. They include a rail-to-rail output buffer amplifier, an internal reference and a double buffered parallel digital interface. The LTC1657/LTC1657L have separate reference input pins that can be driven by an external reference. The full-scale output can be 1 or 2 times the reference voltage depending on how the X1/X2 pin is connected. The LTC1657 operates from a 4.5V to 5.5V supply and has an onboard 2.048V reference. The LTC1657L operates from a 2.7V to 5.5V supply and has an onboard 1.25V reference. The LTC1657/LTC1657L are similar to Linear Technology Corporation’s LT...



LTC1657L
LTC1657/LTC1657L
Parallel 16-Bit Rail-to-Rail
Micropower DAC
FEATURES
nn 16-Bit Monotonic Over Temperature
nn Deglitched Rail-to-Rail Voltage Output: 8nV•s
nn ICC: 650µA Typ
nn Maximum DNL Error: ±1LSB
nn Settling Time: 20µs to ±1LSB
nn Built-In Reference: 2.048V (LTC1657)
1.25V (LTC1657L)
nn Internal Power-On Reset to Zero Volts
nn Asynchronous CLR Pin
nn Output Buffer Configurable for Gain of 1 or 2
nn Parallel 16-Bit or 2-Byte Double Buffered Interface
nn Multiplying Capability
nn Narrow 28-Lead SSOP Package
APPLICATIONS
nn Instrumentation
nn Digital Calibration
nn Industrial Process Control
nn Automatic Test Equipment
nn Communication Test Equipment
DESCRIPTION
The LTC®1657/LTC1657L are complete single supply, rail-
to-rail voltage output, 16-bit digital-to-analog converters
(DAC) in a 28-pin SSOP package. They include a rail-to-rail
output buffer amplifier, an internal reference and a double
buffered parallel digital interface.
The LTC1657/LTC1657L have separate reference input pins
that can be driven by an external reference. The full-scale
output can be 1 or 2 times the reference voltage depending
on how the X1/X2 pin is connected. The LTC1657 operates
from a 4.5V to 5.5V supply and has an onboard 2.048V
reference. The LTC1657L operates from a 2.7V to 5.5V
supply and has an onboard 1.25V reference.
The LTC1657/LTC1657L are similar to Linear Technology
Corporation’s LTC1450/LTC1450L 12-bit VOUT DAC family,
allowing an upgrade path. They are the only buffered 16-bit
parallel DACs in a 28-lead SSOP package and include an
onboard reference for stand alone performance.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
BLOCK DIAGRAM
DATA IN FROM
MICROPROCESSOR
DATA BUS
FROM
MICROPROCESSOR
DECODE LOGIC
FROM
SYSTEM RESET
19 D15 (MSB)
18
17
16
15
14
13
12
D8
11 D7
10
9
8
7
6
5
4 D0 (LSB)
3 CSMSB
1 WR
2 CSLSB
28 LDAC
27 CLR
MSB
8-BIT
INPUT
REGISTER
LSB
8-BIT
INPUT
REGISTER
23
REFOUT
REFERENCE
LTC1657: 2.048V
LTC1657L: 1.25V
16-BIT
DAC
REGISTER
16-BIT
DAC
POWER-ON
RESET
GND
20
22
REFHI
LTC1657: 4.5V TO 5.5V
LTC1657L: 2.7V TO 5.5V
24
VCC
+
R
R
VOUT
25
LTC1657:
0V TO 4.096V
LTC1657L:
0V TO 2.5V
REFLO X1/X2
21 26
1657 TA01
For more information www.linear.com/LTC1657
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 49152
DIGITAL INPUT CODE
65535
1657 TA02
1657lfa
1

LTC1657L
LTC1657/LTC1657L
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VCC to GND................................................ –0.5V to 7.5V
TTL Input Voltage, REFHI, REFLO,
X1/X2 ........................................................ –0.5V to 7.5V
VOUT, REFOUT .............................. –0.5V to (VCC + 0.5V)
Operating Temperature Range
LTC1657C/LTC1657LC ............................ 0°C to 70°C
LTC1657I/LTC1657LI .......................... –40°C to 85°C
Maximum Junction Temperature........................... 125°C
Storage Temperature Range.................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
WR 1
CSLSB 2
CSMSB 3
(LSB) D0 4
D1 5
D2 6
D3 7
D4 8
D5 9
D6 10
D7 11
D8 12
D9 13
D10 14
28 LDAC
27 CLR
26 X1/X2
25 VOUT
24 VCC
23 REFOUT
22 REFHI
21 REFLO
20 GND
19 D15 (MSB)
18 D14
17 D13
16 D12
15 D11
OBSOLETE PACKAGE
GN PACKAGE
N PACKAGE
28-LEAD PLASTIC SSOP
28-LEAD PDIP
TJMAX = 125°C, θJA = 95°C/W (GN)
TJMAX = 125°C, θJA = 58°C/W (N)
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC1657CGN#PBF
LTC1657CGN#TRPBF 1657CGN
28-Lead Plastic SSOP
LTC1657IGN#PBF
LTC1657IGN#TRPBF
1657IGN
28-Lead Plastic SSOP
LTC1657LCGN#PBF
LTC1657LCGN#TRPBF 1657LCGN
28-Lead Plastic SSOP
LTC1657LIGN#PBF
LTC1657LIGN#TRPBF 1657LIGN
28-Lead Plastic SSOP
OBSOLETE PACKAGE
LTC1657CN#PBF
LTC1657CN#TRPBF
1657CN
28-Lead PDIP
LTC1657IN#PBF
LTC1657IN#TRPBF
1657IN
28-Lead PDIP
LTC1657LCN#PBF
LTC1657LCN#TRPBF
1657LCN
28-Lead PDIP
LTC1657LIN#PBF
LTC1657LIN#TRPBF
1657LIN
28-Lead PDIP
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
1657lfa
2 For more information www.linear.com/LTC1657




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)