These characteristics are included for design guidance and are no subject" />
參數(shù)資料
型號: AD7849BR
廠商: Analog Devices Inc
文件頁數(shù): 16/20頁
文件大小: 0K
描述: IC DAC 14/16BIT SRL-IN 20-SOIC
產(chǎn)品培訓模塊: Data Converter Fundamentals
DAC Architectures
標準包裝: 37
設置時間: 7µs
位數(shù): 16
數(shù)據(jù)接口: 串行
轉(zhuǎn)換器數(shù)目: 1
電壓電源: 模擬和數(shù)字,雙 ±
功率耗散(最大): 100mW
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-SOIC(0.295",7.50mm 寬)
供應商設備封裝: 20-SOIC W
包裝: 管件
輸出數(shù)目和類型: 1 電壓,單極;1 電壓,雙極
采樣率(每秒): 143k
AD7849
Rev. C | Page 5 of 20
AC PERFORMANCE CHARACTERISTICS
These characteristics are included for design guidance and are no subject to test. VREF+ = 5 V; VDD = 14.25 V to 15.75 V; VSS = 14.25 V to
15.75 V; VCC = 4.75 V to 5.25 V; ROFS connected to 0 V.
Table 3.
Parameter
A, B, C Versions
Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE
Output Settling Time1
7
μs typ
To 0.006% FSR. VOUT loaded. VREF = 0 V.
10
μs typ
To 0.003% FSR. VOUT loaded. VREF = 5 V.
Slew Rate
4
V/μs typ
Digital-to-Analog Glitch Impulse
250
nV-sec typ
DAC alternatively loaded with 00 … 00 and
111 … 11. VOUT loaded. LDAC permanently low.
BIN/COMP set to 1. VREF = 5 V.
150
nV-sec typ
LDAC frequency = 100 kHz.
AC Feedthrough
1
mV p-p typ
VREF = 0 V, VREF+ = 1 V rms, 10 kHz sine wave.
DAC loaded with all 0s. BIN/COMP set to 0.
Digital Feedthrough
5
nV-sec typ
DAC alternatively loaded with all 1s and 0s.
SYNC high.
Output Noise Voltage Density, 1 kHz to 100 kHz
80
nV/√Hz typ
Measured at VOUT. VREF+ = VREF = 0 V.
BIN/COMP set to 0.
1
LDAC = 0. Settling time does not include deglitching time of 5 μs (typical).
TIMING CHARACTERISTICS
VDD = 14.25 V to 15.75 V; VSS = 14.25 V to 15.75 V; VCC = 4.75 V to 5.25 V; RL = 2 kΩ, CL = 200 pF. All specifications TMIN to TMAX,
unless otherwise noted. Guaranteed by characterization. All input signals are specified tr = tf = 5 ns (10% to 90% of 5 V and timed from a
voltage level of 1.6 V.
Table 4.
Parameter
Limit at 25°C (All Versions)
Limit at TMIN, TMAX (All Versions)
Unit
Test Conditions/Comments
t11
200
ns min
SCLK cycle time
t2
50
ns min
SYNC-to-SCLK setup time
t3
70
ns min
SYNC-to-SCLK hold time
t4
10
ns min
Data setup time
t5
40
ns min
Data hold time
t62
80
ns max
SCLK falling edge to SDO valid
t7
80
ns min
LDAC, CLR pulse width
tr
30
μs max
Digital input rise time
tf
30
μs max
Digital input fall time
1 SCLK mark/space ratio range is 40/60 to 60/40.
2 SDO load capacitance is 50 pF.
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