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參數資料
| 型號： | MAX5895 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 16-Bit, 500Msps Interpolating and Modulating Dual DAC with CMOS Inputs |
| 中文描述： | 16位、500Msps、插值與調制、雙路DAC，CMOS輸入 |
| 文件頁數： | 28/32頁 |
| 文件大?。?/td> | 807K |
| 代理商： | MAX5895 |
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M
Reference Input/Output
The MAX5895 supports operation with the on-chip 1.2V
bandgap reference or an external reference voltage
source. REFIO serves as the input for an external, low-
impedance reference source, and as the output if the
DAC is operating with the internal reference.
For stable operation with the internal reference, REFIO
should be decoupled to GND with a 1μF capacitor.
REFIO must be buffered with an external amplifier, if heavy
loading is required, due to its 10k
output resistance.
Alternatively, apply a temperature-stable external refer-
ence to REFIO (Figure 18). The internal reference is over-
driven by the external reference. For improved accuracy
and drift performance, choose a fixed output voltage ref-
erence such as the MAX6520 bandgap reference.
The MAX5895’s reference circuit (Figure 19) employs a
control amplifier, designed to regulate the full-scale
current I
OUT
for the differential current outputs of the
DAC. The output current can be calculated as:
I
OUTFS
= 32 x I
REFIO
- 1LSB
I
OUTFS
= 32 x I
REFIO
- (I
OUT
/ 2
16
)
where I
REFIO
is the reference output current (I
REFIO
=
V
REFIO
/ R
SET
) and I
OUT
is the full-scale output current
of the DAC. Located between FSADJ and DACREF,
R
SET
is the reference resistor, which determines the
amplifier’s output current for the DAC. Use Table 5 for a
matrix of different I
OUTFS
and R
SET
selections.
16-Bit, 500Msps Interpolating and Modulating
Dual DAC with CMOS Inputs
28
______________________________________________________________________________________
Figure 18. Typical External Reference Circuit
1.2V
REFERENCE
CURRENT-
SOURCE
ARRAY DAC
REFIO
EXTERNAL
1.25V
REFERENCE
R
SET
FSADJ
I
REF
10k
DACREF
1
μ
F
MAX5895
1.2V
REFERENCE
CURRENT-
SOURCE
ARRAY DAC
REFIO
FSADJ
I
REF
10k
DACREF
1
μ
F
MAX5895
R
SET
FULL-SCALE
CURRENT
REFERENCE
CURRENT
R
SET
(
)
OUTPUT VOLTAGE
I
OUTFS
(mA)
2
5
10
15
20
I
REF
(μA)
62.50
156.26
312.50
468.75
625.00
CALCULATED
19.2k
7.68k
3.84k
2.56k
1.92k
1% EIA STD
19.1k
7.5k
3.83k
2.55k
1.91k
V
IOUTP/N
* (mV
P-P
)
100
250
500
750
1000
Figure 19. MAX5895 Internal Reference Architecture
Table 5. I
OUTFS
and R
SET
Selection Matrix Based on a Typical 1.20V Reference Voltage
*
Terminated into a 50
load.
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相關代理商/技術參數 |
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| MAX5895EGK+D | 功能描述:數模轉換器- DAC 16-Bit 2Ch 500Msps DAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5895EGK+TD | 功能描述:數模轉換器- DAC 16-Bit 2Ch 500Msps DAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5895EGK-D | 功能描述:數模轉換器- DAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5895EGK-TD | 功能描述:數模轉換器- DAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX5895EVCMOD2 | 功能描述:數模轉換器- DAC Evaluation Kit for the MAX5893/MAX5894/MAX5895 RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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