參數(shù)資料
型號： DAC8820IB
廠商： Texas Instruments, Inc.
英文描述： 16-Bit, Parallel Input Multiplying Digital-to-Analog Converter
中文描述： 16位并行輸入乘法數(shù)字到模擬轉(zhuǎn)換器
文件頁數(shù)： 4/22頁
文件大小： 939K
代理商： DAC8820IB
www.ti.com
PIN ASSIGNMENTS
REF
R
COM
R1
R
OFS
R
FB
I
OUT
AGND
LDAC
WR
D15
D14
D13
D12
D11
RST
D0
D1
D2
D3
V
DD
DGND
D4
D5
D6
D7
D8
D9
D10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
DAC8820
DAC8820
SBAS358C–AUGUST 2005–REVISED JUNE 2006
ELECTRICAL CHARACTERISTICS (continued)
All specifications at –40
°
C to +85°C, V
= +2.7 V to +5.5 V, I
OUT
= virtual GND, GND = 0 V, V
REF
= 10 V, and T
A
= full
operating temperature, unless otherwise noted.
DAC8820
TYP
PARAMETER
CONDITIONS
MIN
MAX
UNITS
POWER REQUIREMENTS
V
DD
I
DD
(normal operation)
V
DD
= +4.5 V to +5.5 V
V
DD
= +2.7 V to +3.6 V
AC CHARACTERISTICS
(2)
Output current settling time
Reference multiplying BW
2.7
5.5
5
5
2.5
V
μ
A
μ
A
μ
A
Logic inputs = 0 V
V
IH
= V
DD
and V
IL
= GND
V
IH
= V
DD
and V
IL
= GND
3
1
0.5
8
μ
s
MHz
V
REF
= 5 V
PP
, Data = FFFFh
V
= 0 V to 10 V,
Data = 7FFFh to 8000h to 7FFFh
Data = 0000h, V
REF
= 10 kHz,
±
10V
PP
LDAC = Logic low, V
REF
= –10 V to + 10 V
Any code change
V
REF
= 6V
RMS
, Data = FFFFh, f = 1kHz
DAC glitch impulse
2
nV–s
Feedthrough error V
OUT
/V
REF
–70
dB
Digital feedthrough
1
nV–s
Total harmonic distortion
Output spot noise voltage
–105
10
dB
nV/
√
Hz
(2)
Specified by design and characterization; not production tested.
PIN #
NAME
DESCRIPTION
Center tap of two 4-quadrant resistors
(R1 and R2).
4-quadrant resistor (R1).
Bipolar offset resistor
Internal matching feedback resistor
DAC current output
Analog ground
Digital input load DAC control. When LDAC
is high, data is loaded from input register into
a DAC register, updating the DAC output.
Write control digital input. Active low. When
WR is taken to logic low, data is loaded from
the digital input pins (D0–D15) into a16-bit
input register.
2
R
COM
3
4
5
6
7
R1
R
OFS
R
FB
I
OUT
AGND
8
LDAC
9
WR
10–2
1
22
23
24–2
7
D15–D4
Digital input data bits. D15 is MSB.
DGND
V
DD
Digital ground
Positive power supply
D3–D0
Digital Input data bits. D0 is LSB.
Reset. Active low. When RST is taken to
logic low, the DAC output and all internal
registers are set to zero code for the
DAC8820.
28
RST
TERMINAL FUNCTIONS
PIN #
NAME
DESCRIPTION
Reference input and 4-quadrant Resistor
(R2).
1
REF
4
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