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ADS-947GC 参数 Datasheet PDF下载

ADS-947GC图片预览
型号: ADS-947GC
PDF下载: 下载PDF文件 查看货源
内容描述: 14位, 10MHz的采样A / D转换器 [14-Bit, 10MHz Sampling A/D Converters]
分类和应用: 转换器
文件页数/大小: 8 页 / 216 K
品牌: MURATA-PS [ MURATA POWER SOLUTIONS INC. ]
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®
®
ADS-947
14-Bit, 10MHz
Sampling A/D Converters
PRELIMINARY PRODUCT DATA
FEATURES
14-bit resolution
10MHz minimum sampling rate
No missing codes
Ideal for both time and frequency-domain applications
Excellent THD (–81dB) and SNR (76dB)
Edge-triggered
Small, 24-pin, ceramic DDIP or SMT
Requires only +5V and –5.2V supplies
Low-power, 2 Watts
GENERAL DESCRIPTION
The ADS-947 is a 14-bit, 10MHz sampling A/D converter.
This device accurately samples full-scale input signals up to
Nyquist frequencies with no missing codes. Excellent
differential nonlinearity error (DNL), signal-to-noise ratio
(SNR), and total harmonic distortion (THD) make the ADS-
947 the ideal choice for both time-domain (CCD/FPA
imaging, scanners, process control) and frequency-domain
(radar, telecommunications, spectrum analysis) applications.
The functionally complete ADS-947 contains a fast-settling
sample/hold amplifier, a subranging (two-pass) A/D converter,
an internal reference, timing/control logic, and error-correction
circuitry. Digital input and output levels are TTL. The ADS-947
only requires the rising edge of a start convert pulse to
operate.
Requiring only +5V and –5.2V supplies, the ADS-947 typically
dissipates just 2 Watts. The device is offered with a bipolar
input range of ±2V. Models are available for use in either
commercial (0 to +70°C) or extended (–40 to +100°C)
PIN
1
2
3
4
5
6
7
8
9
10
11
12
INPUT/OUTPUT CONNECTIONS
FUNCTION
BIT 1 (MSB)
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
BIT 10
BIT 11
BIT 12
PIN
24
23
22
21
20
19
18
17
16
15
14
13
FUNCTION
ANALOG GROUND
OFFSET ADJUST
+5V ANALOG SUPPLY
ANALOG INPUT
–5.2V SUPPLY
ANALOG GROUND
START CONVERT
DATA VALID
BIT 14 (LSB)
BIT 13
DIGITAL GROUND
+5V DIGITAL SUPPLY
operating temperature ranges. A proprietary, auto-calibrating,
error-correcting circuit allows the device to achieve specified
performance over the extended temperature range.
OFFSET ADJUST 23
BUFFER
ANALOG INPUT 21
S/H
+
FLASH
ADC
1
16 BIT 14 (LSB)
REGISTER
15 BIT 13
12 BIT 12
DIGITAL CORRECTION LOGIC
11 BIT 11
POWER AND GROUNDING
REF
+5V ANALOG SUPPLY
+5V DIGITAL SUPPLY
–5.2V SUPPLY
ANALOG GROUND
DIGITAL GROUND
22
13
20
19, 24
14
AMP
FLASH
ADC
2
DAC
OUTPUT REGISTER
10 BIT 10
9
8
7
6
5
4
3
2
1
BIT 9
BIT 8
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1 (MSB)
S
START CONVERT 18
DATA VALID 17
TIMING AND
CONTROL LOGIC
Figure 1. ADS-947 Functional Block Diagram
DATEL, Inc., Mansfield, MA 02048 (USA)
Tel: (508) 339-3000, (800) 233-2765 Fax: (508) 339-6356
Email: sales@datel.com
Internet: www.datel.com
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