ADS-951ME 查看數據表（PDF） - Murata Power Solutions
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ADS-951ME Datasheet PDF : 6 Pages
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PRELIMINARY PRODUCT DATA
ADS-951
18-Bit, 1MHz, Low-Power
Sampling A/D Converters
FEATURES
• 18-bit resolution
• 1MHz minimum sampling rate
• No missing codes over extended temperature range
• Very low power, 1.45 Watts
• Small, 32-pin, side-brazed, ceramic TDIP
• Edge-triggered
• Excellent performance
• Ideal for both time and frequency-domain applications
• Low cost
GENERAL DESCRIPTION
The ADS-951 is an 18-bit, 1MHz sampling A/D converter. This
device accurately samples full-scale input signals up to
Nyquist frequencies with no missing codes. This feature,
combined with excellent signal-to-noise ratio (SNR) and total
harmonic distortion (THD), makes the ADS-951 the ideal
choice for both time-domain (medical imaging, scanners,
process control) and frequency-domain (radar, telecommunica-
tions, spectrum analysis) applications.
Packaged in a 32-pin, side-brazed, metal-sealed, ceramic
TDIP, the functionally complete ADS-951 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, and
the ADS-951 only requires the rising edge of the start convert
pulse to operate.
Requiring ±15V and ±5V supplies, the ADS-951 typically
dissipates 1.45 Watts. The device is offered with a bipolar
(±5V) analog input range. Models are available for use in
either commercial (0 to +70°C) or extended (–40 to +110°C)
INPUT/OUTPUT CONNECTIONS
PIN FUNCTION
PIN FUNCTION
1 BIT 2
32 BIT 3
2 BIT 1 (MSB)
31 BIT 4
3 ANALOG GROUND
30 BIT 5
4 ANALOG INPUT
29 BIT 6
5 +5V REFERENCE OUT 28 BIT 7
6 GAIN ADJUST
27 BIT 8
7 COMPENSATION
26 BIT 9
8 –15V SUPPLY
25 BIT 10
9 +15V SUPPLY
24 BIT 11
10 +5V ANALOG SUPPLY 23 BIT 12
11 –5V ANALOG SUPPLY 22 BIT 13
12 ANALOG GROUND
21 BIT 14
13 DIGITAL GROUND
20 BIT 15
14 +5V DIGITAL SUPPLY 19 BIT 16
15 EOC
18 BIT 17
16 START CONVERT
17 BIT 18 (LSB)
operating temperature ranges. A proprietary, auto-calibrating,
error-correcting circuit enables the device to achieve speci-
fied performance over the full military temperature range.
ANALOG INPUT 4
–
S/H
+
BUFFER
FLASH
ADC
1
GAIN ADJUST 6
+5V REFERENCE OUT 5
COMPENSATION 7
GAIN
CIRCUIT
REF
5
START CONVERT 16
EOC 15
AMP
TIMING AND
CONTROL LOGIC
DAC
FLASH
ADC
2
2 BIT 1 (MSB)
1 BIT 2
32 BIT 3
31 BIT 4
30 BIT 5
29 BIT 6
28 BIT 7
27 BIT 8
26 BIT 9
25 BIT 10
24 BIT 11
23 BIT 12
22 BIT 13
21 BIT 14
20 BIT 15
19 BIT 16
18 BIT 17
17 BIT 18 (LSB)
10
+5V ANALOG
SUPPLY
11
–5V ANALOG
SUPPLY
3, 12
ANALOG
GROUND
14
+5V DIGITAL
SUPPLY
9
+15V
SUPPLY
8
–15V
SUPPLY
Figure 1. ADS-951 Functional Block Diagram
13
DIGITAL
GROUND
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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