參數資料
| 型號： | LTC2758AILX#PBF |
| 廠商： | Linear Technology |
| 文件頁數： | 1/24頁 |
| 文件大小： | 0K |
| 描述： | IC DAC 18BIT SPI/SRL 48-LQFP |
| 標準包裝： | 250 |
| 系列： | SoftSpan™ |
| 設置時間： | 2.1µs |
| 位數： | 18 |
| 數據接口： | 串行，SPI? |
| 轉換器數目： | 2 |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-LQFP |
| 供應商設備封裝： | 48-LQFP（7x7） |
| 包裝： | 管件 |
| 輸出數目和類型： | 2 電流，單極；4 電流，雙極 |
| 配用： | DC1684A-A-ND - BOARD DAC LTC2758 |
LTC2758
1
2758fa
For more information www.linear.com/LTC2758
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Dual Serial 18-Bit
SoftSpan IOUT DACs
The LTC2758 is a dual 18-bit multiplying serial-input,
current-output digital-to-analog converter. LTC2758A
provides full 18-bit performance (INL and DNL of ±1LSB
maximum) over temperature without any adjustments.
18-bit monotonicity is guaranteed in all performance
grades. This SoftSpan DAC operates from a single 3V
to 5V supply and offers six output ranges (up to ±10V)
that can be programmed through the 3-wire SPI serial
interface or pin-strapped for operation in a single range.
Any on-chip register (including DAC output-range set-
tings) can be read for verification in just one instruction
cycle; and if you change register content, the altered
register will be automatically read back during the next
instruction cycle.
Voltage-controlled offset and gain adjustments are also
provided; and the power-on reset circuit and CLR pin both
reset the DAC outputs to 0V regardless of output range.
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
Dual 18-Bit VOUT DAC with Software-Selectable Ranges
n
Maximum 18-Bit INL Error: ±1 LSB Over Temperature
n
Program or Pin-Strap Six Output Ranges:
0V to 5V, 0V to 10V, –2.5V to 7.5V, ±2.5V, ±5V, ±10V
n
Guaranteed Monotonic Over Temperature
n
Glitch Impulse 0.4nVs (3V), 2nVs (5V)
n
18-Bit Settling Time: 2.1s
n
2.7V to 5.5V Single Supply Operation
n
1A Maximum Supply Current
n
Voltage-Controlled Offset and Gain Trims
n
Serial Interface with Readback of All Registers
n
Clear and Power-On-Reset to 0V Regardless of
Output Range
n
48-Pin 7mm
× 7mm LQFP Package
n
Instrumentation
n
Medical Devices
n
Automatic Test Equipment
n
Process Control and Industrial Automation
LTC2758 Integral Nonlinearity
CODE
0
65536
–1.0
INL
(LSB)
–0.8
–0.6
–0.4
–0.2
0.6
0.4
0.2
0
0.8
1.0
131072
196608
262143
2758 TA01b
0V TO 10V RANGE
LTC2758
5V
4
SPI WITH
READBACK
GND
VDD
–
+
–
DAC B
DAC A
REFERENCE
5V
VOUTA
VOUTB
RINA
REFA
REFERENCE
5V
REFB
ROFSA
GEADJA
GEADJB ROFSB
RCOMB
RCOMA
RINB
VOSADJA
VOSADJB
IOUT1A
IOUT2A
IOUT1B
IOUT2B
RFBA
RFBB
–
+
–
2758 TA01a
LT1012
LT1468
0.1F
OFFSET A ADJUST
OFFSET B ADJUST
GAIN A
ADJUST
GAIN B
ADJUST
27pF
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