LTC1657 Datasheet, PDF (1/12 Pages) Linear Technology – Parallel 16-Bit Rail-to-Rail Micropower DAC

LTC1657
Parallel 16-Bit Rail-to-Rail
Micropower DAC
FEATURES
s _{16-Bit Monotonic Over Temperature}
s _{Deglitched Rail-to-Rail Voltage Output: 8nV•s}
s _{5V Single Supply Operation}
s _{ICC: 650µA Typ}
s _{Maximum DNL Error: ±1LSB}
s _{Settling Time: 20µs to ±1LSB}
s _{Internal or External Reference}
s _{Internal Power-On Reset to Zero Volts}
s _{Asynchronous CLR Pin}
s _{Output Buffer Configurable for Gain of 1 or 2}
s _{Parallel 16-Bit or 2-Byte Double Buffered Interface}
s _{Narrow 28-Lead SSOP Package}
s _{Multiplying Capability}
U
APPLICATIO S
s _{Instrumentation}
s _{Digital Calibration}
s _{Industrial Process Control}
s _{Automatic Test Equipment}
s _{Communication Test Equipment}
DESCRIPTIO
The LTC^®1657 is a complete single supply, rail-to-rail
voltage output, 16-bit digital-to-analog converter (DAC) in
a 28-pin SSOP or PDIP package. It includes a rail-to-rail
output buffer amplifier, an internal 2.048V reference and
a double buffered parallel digital interface.
The LTC1657 operates from a 4.5V to 5.5V supply. It has
a separate reference input pin 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 is similar to Linear Technology Corporation’s
LTC1450 12-bit V_OUT DAC family allowing an upgrade
path. It is the only buffered 16-bit parallel DAC in a 28-lead
SSOP package and includes an onboard reference for
stand alone performance.
, LTC and LT are registered trademarks of Linear Technology Corporation.
BLOCK DIAGRA
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
16-BIT
DAC
REGISTER
POWER-ON
RESET
23
REFOUT
REFERENCE
2.048V
22
REFHI
5V
24
V_CC
16-BIT
DAC
+
–
R
R
GND
20
REFLO X1/X2
21
26
V_{OUT 25 0V TO}
4.096V
1657 TA01
Differential Nonlinearity
vs Input Code
1.0
0.8
0.6
0.4
0.2
0.0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384 32768 49152
DIGITAL INPUT CODE
65535
1657 G01
1