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參數資料
| 型號： | ADS-947GM |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 串行ADC |
| 英文描述： | 14-Bit, 10MHz Sampling A/D Converters |
| 中文描述： | 14位，10MHz的采樣A / D轉換器 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 169K |
| 代理商： | ADS-947GM |
Figure 1. ADS-947 Functional Block Diagram
FEATURES
14-bit resolution
10MHz minimum sampling rate
No missing codes over full military temperature range
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
Low cost
GENERAL DESCRIPTION
The low-cost 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 military (–55 to +125°C) operating
temperature ranges. A proprietary, auto-calibrating, error-
correcting circuit allows the device to achieve specified
performance over the full military temperature range.
INPUT/OUTPUT CONNECTIONS
PRELIMINARY PRODUCT DATA
REF
DAC
R
R
O
16 BIT 14 (LSB)
15 BIT 13
12 BIT 12
11 BIT 11
10 BIT 10
9 BIT 9
8 BIT 8
7 BIT 7
6 BIT 6
5 BIT 5
4 BIT 4
3 BIT 3
2 BIT 2
1 BIT 1 (MSB)
TIMING AND
CONTROL LOGIC
OFFSET ADJUST 23
ANALOG INPUT 21
START CONVERT 18
DATA VALID 17
+5V ANALOG SUPPLY 22
+5V DIGITAL SUPPLY 13
–5.2V SUPPLY
20
ANALOG GROUND
19, 24
DIGITAL GROUND
14
–
+
S/H
BUFFER
D
FLASH
ADC
1
FLASH
ADC
2
POWER AND GROUNDING
S
AMP
PIN
FUNCTION
PIN
FUNCTION
1
2
3
4
5
6
7
8
9
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
24
23
22
21
20
19
18
17
16
15
14
13
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
10
11
12
ADS -947
14-Bit, 10MHz
Sampling A/D Converters
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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