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參數資料
| 型號： | WM2625ID |
| 廠商： | Wolfson Microelectronics |
| 英文描述： | Low Power Dual 8-bit Serial Input DAC |
| 中文描述： | 低功耗雙8位串行輸入DAC |
| 文件頁數： | 1/9頁 |
| 文件大小： | 101K |
| 代理商： | WM2625ID |
WM2625
Low Power Dual 8-bit Serial Input DAC
Production Data, April 2001, Rev. 1.0
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
Email: sales@wolfson.co.uk
www.wolfsonmicro.com
Production Data
Datasheets
contain final
specifications current on publication date.
Supply of products conforms to Wolfson
Microelectronics’ Terms and conditions.
2001 Wolfson Microelectronics Ltd
.
FEATURES
Dual 8-bit voltage output DAC
Single supply from 2.7V to 5.5V
Low supply current
-
0.8mA typical in slow mode
-
1.8mA typical in fast mode
DNL
±
0.2 LSB, INL
±
0.5 LSB (max)
Monotonic over temperature
DSP compatible serial interface
Programmable settling time of 1
μ
s or 3
μ
s typical
High impedance reference input buffer
APPLICATIONS
Digital servo control loops
Industrial process control
Battery powered instruments and controls
Machine and motion control devices
Digital offset and gain adjustment
ORDERING INFORMATION
DEVICE
TEMP. RANGE
PACKAGE
WM2625CD
0° to 70°C
8-pin SOIC
WM2625ID
-40° to 85°C
8-pin SOIC
DESCRIPTION
The WM2625 is a dual 8-bit voltage output, resistor string
digital-to-analogue converter. It can operate with supply
voltages between 2.7V and 5.5V and can be powered down
under software control. Power
consumption to 1
μ
A.
down
reduces
current
The device has been designed for glueless interface to industry
standard microprocessors and DSPs. The WM2625 is
programmed with a 16-bit serial word including 4 control bits
and 8 data bits.
Excellent performance is delivered with a typical DNL of
0.2LSBs. Monotonicity is guaranteed over the operating
temperature range. The settling time of the DAC is
programmable to allow for optimisation of speed versus power
dissipation. The analogue output is buffered by a rail-to-rail
amplifier with a gain of two and a Class AB output stage.
The reference voltage input features a high impedance buffer
which eliminates the need to keep the reference source
impedance low.
The WM2625 is available in an 8-pin SOIC package.
Commercial (0
°
to 70
°
C) and Industrial (-40
°
to 85
°
C)
temperature range variants are available.
BLOCK DIAGRAM
TYPICAL PERFORMANCE
WM2625
SERIAL
INTERFACE
AND
CONTROL
LOGIC
POWER-
DOWN AND
SPEED
CONTROL
X1
X1
X2
X2
REF
DIN
SCLK
NCS
OUTA
OUTB
8
8
2
VDD
GND
DAC
DAC
VDD = 5V, V
REF
= 2.048V, Speed = Fast Mode, T
A
= 25.5
O
C
-0.1
-0.08
-0.06
-0.04
-0.02
0
0.02
0.04
0.06
0.08
0.1
0
32
64
96
128
160
192
224
256
DIGITAL CODE
D
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