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參數資料
| 型號： | AD7801BR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | +2.7 V to +5.5 V, Parallel Input, Voltage Output 8-Bit DAC |
| 中文描述： | PARALLEL, 8 BITS INPUT LOADING, 1.2 us SETTLING TIME, 8-BIT DAC, PDSO20 |
| 封裝： | SOIC-20 |
| 文件頁數： | 4/16頁 |
| 文件大小： | 219K |
| 代理商： | AD7801BR |
AD7801
–4–
REV. 0
PIN FUNCT ION DE SCRIPT IONS
Pin
No.
Mnemonic
Function
1–8
9
10
11
12
13
D7–D0
CS
WR
DGND
PD
LDAC
Parallel Data Inputs. 8-bit data is loaded to the input register of the AD7801 under the control of
CS
and
WR
.
Chip Select. Active low logic input.
Write Input.
WR
is an active low logic input used in conjunction with
CS
to write data to the input register.
Digital Ground
Active low input used to put the part into low power mode reducing current consumption to less than 1
μ
A.
Load DAC Logic Input. When this logic input is taken low the DAC output is updated with the contents of
its DAC register. If
LDAC
is permanently tied low the DAC is updated on the rising edge of
WR
.
Asynchronous Clear Input (Active Low). When this input is taken low the DAC register is loaded with all
zeroes and the DAC output is cleared to zero volts.
Power Supply Input. T his part can be operated from +2.7 V to +5.5 V and should be decoupled to GND.
External Reference Input. T his can be used as the reference for the DAC. T he range on this reference input is
1 V to V
DD
/2. If REFIN is tied directly to V
DD
the internal V
DD
/2 reference is selected.
Analog Ground reference point and return point for all analog current on the part.
No Connect Pin.
Analog Output Voltage from the DAC. T he output amplifier can swing rail to rail on its output.
Digital Ground reference point and return point for all digital current on the part.
14
CLR
15
16
V
DD
REFIN
17
18
19
20
AGND
NC
V
OUT
DGND
PIN CONFIGURAT ION
14
13
12
11
17
16
15
20
19
18
10
9
8
1
2
3
4
7
6
5
TOP VIEW
(Not to Scale)
AD7801
NC = NO CONNECT
(MSB) DB7
AGND
NC
V
OUT
DGND
DB6
DB5
DB4
CLR
V
DD
REFIN
DB3
DB2
DB1
(LSB) DB0
CS
WR
DGND
PD
LDAC
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| AD7801BR-REEL | 制造商:Analog Devices 功能描述:DAC 1-CH Current Steering 8-bit 20-Pin SOIC W T/R |
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