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ADS117 Datasheet Preview

ADS117 Datasheet

Low-Power Sampling A/D Converters

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ADS117 pdf
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®
FEATURES
12-bit resolution
No missing codes
2MHz minimum throughput
Functionally complete
Small 24-pin DDIP
Low-power, 1.6 Watts
Three-state output buffers
Samples to Nyquist frequencies
GENERAL DESCRIPTION
DATEL's ADS-117 is a functionally complete, 12-bit, 2MHz,
sampling A/D converter. Its standard, 24-pin, double-width
DIP contains a fast-settling sample-hold amplifier, a 12-bit
subranging (two-step) A/D converter, a precision reference,
three-state output register and all the timing and control logic
necessary to operate from a single start convert pulse. Digital
input and output levels are TTL.
Total harmonic distortion (THD) and signal-to-noise ratio
(including distortion) typically run –78dB and 70dB,
respectively, with full scale inputs up to 100kHz. The ADS-
117 requires ±15V and +5V power supplies and typically
consumes 1.6 Watts. Models are available for use in either
commercial (0 to +70°C) or military (–55 to +125°C) operating
temperature ranges.
ADS-117
12-Bit, 2MHz, Low-Power
Sampling A/D Converters
INPUT/OUTPUT CONNECTIONS
PIN FUNCTION
PIN FUNCTION
1 BIT 12 (LSB)
2 BIT 11
3 BIT 10
4 BIT 9
5 BIT 8
6 BIT 7
7 BIT 6
8 BIT 5
9 BIT 4
10 BIT 3
11 BIT 2
12 BIT 1 (MSB)
24 –15V SUPPLY
23 ANALOG GROUND
22 +15V SUPPLY
21 +10V REFERENCE
20 BIPOLAR
19 ANALOG INPUT
18 COMP BIN
17 ENABLE (1-12)
16 START CONVERT
15 EOC
14 DIGITAL GROUND
13 +5V SUPPLY
+10V REF. 21
BIPOLAR 20
ANALOG INPUT 19
REF
S2
FLASH
S/H ADC
S1
BUFFER
+
DAC
17 ENABLE (1-12)
12 BIT 1 (MSB)
11 BIT 2
10 BIT 3
9 BIT 4
8 BIT 5
7 BIT 6
6 BIT 7
5 BIT 8
4 BIT 9
3 BIT 10
2 BIT 11
1 BIT 12 (LSB)
COMP BIN 18
START CONVERT 16
EOC 15
TIMING AND
CONTROL LOGIC
13
+5V SUPPLY
14
DIGITAL GROUND
22
+15V SUPPLY
23
ANALOG GROUND
Figure 1. ADS-117 Functional Block Diagram
24
–15V SUPPLY
DATEL, Inc., 11 Cabot Boulevard, Mansfield, MA 02048-1151 (U.S.A.) Tel: (508) 339-3000 Fax: (508) 339-6356 For immediate assistance: (800) 233-2765



Datel
Datel

ADS117 Datasheet Preview

ADS117 Datasheet

Low-Power Sampling A/D Converters

No Preview Available !

ADS117 pdf
www.DataSheet4U.com
ADS-117
®®
ABSOLUTE MAXIMUM RATINGS
PARAMETERS
LIMITS
UNITS
+15V Supply (Pin 22)
–15V Supply (Pin 24)
+5V Supply (Pin 13)
Digital Inputs (Pin 16, 17, 18)
Analog Input (Pin 19)
Lead Temp. (10 seconds)
0 to +16
0 to –16
0 to +6.0
–0.3 to +VDD +0.3
–9 to +15
+300
Volts
Volts
Volts
Volts
Volts
°C
FUNCTIONAL SPECIFICATIONS
(TA = +25°C, ±VCC = +15V, +VDD =+5V, 2MHz sampling rate, and a minimum 3 minute
warmup unless otherwise specified.)
ANALOG INPUTS
MIN. TYP. MAX. UNITS
Input Voltage Range
Bipolar
Unipolar
Input Impedence
Input Capacitance
DIGITAL INPUTS
— ±5 —
— 0 to +10 —
4.5 5 —
— 6 15
Volts
Volts
k
pF
Logic Levels
Logic "1"
Logic "0"
Logic Loading "1"
Logic Loading "0"
PERFORMANCE
+2.0 — — Volts
— — +0.8 Volts
— — +5 µA
— — –600 µA
Resolution
No Missing Codes
(12 Bits; fin = 1MHz)
Integral Non-Linearity
0°C to +70°C
–55°C to +125°C
Differential Non-Linearity
0°C to +70°C
–55°C to +125°C
Full Scale Absolute Accuracy
(see Tech Note 1)
0°C to +70°C
–55°C to +125°C
Unipolar/Bipolar Zero Error
0°C to +70°C (see Tech Note 1)
–55°C to +125°C
Bipolar Offset Error
0°C to +70°C (see Tech Note 1)
–55°C to +125°C
Gain Error (see Tech Note 1)
0°C to +70°C
–55°C to +125°C
Internal Reference Voltage
0°C to +70°C
–55°C to +125°C
External Current
DYNAMIC PERFORMANCE
+9.97
+9.95
12 Bits
0 to +70°C
±1/2 ±3
±1 ±4
±1/2 ±0.95
±1 +1.5
LSB
LSB
LSB
LSB
±0.13
±0.25
±0.07
±0.22
±0.1
±0.53
±0.1
±0.53
+10.0
±0.44
±0.73
±0.38
±0.73
±0.38
±0.73
±0.38
±0.73
+10.03
+10.05
1.5
%FSR
%FSR
%FSR
%FSR
%FSR
%FSR
%
%
Volts
Volts
mA
Spurious Free Dynamic
Range (–0.5dB)
dc to 100kHz
100kHz to 500kHz
500kHz to 1MHz
Total Harm. Distort. (–0.5dB)
dc to 100kHz
100kHz to 500kHz
500kHz to 1MHz
Input Bandwith (–3dB)
Small Signal (–20dB input)
Large Signal (–0.5dB input)
Feedthrough (1MHz)
8
7
–72
See Table 1 also
Same specifications for in-band harmonics.
–81 —
–75 –70
–70 —
dB
dB
dB
–78 —
–73 –68
–71 —
dB
dB
dB
10 — MHz
9 — MHz
–74 —
dB
DYNAMIC PERF. (cont)
MIN. TYP. MAX. UNITS
SNR (wo/distortion, –0.5dB)
dc to 100kHz
0°C to +70°C
–55°C to +125°C
100kHz to 500kHz
0°C to +70°C
–55°C to +125°C
500kHz to 1MHz
0°C to +70°C
–55°C to +125°C
SNR (and distort., –0.5dB)
dc to 100kHz
0°C to +70°C
–55°C to +125°C
100kHz to 500kHz
0°C to +70°C
–55°C to +125°C
500kHz to 1MHz
0°C to +70°C
–55°C to +125°C
Two-tone Intermodulation
Distortion (fin = 970kHz,
990kHz, fs = 2Mhz,
–0.5dB)
Slew Rate
Effect. Aperture Delay Time
Overvoltage Recovery
Time; 20%
S/H Acq. Time, (to ±0.01%)
0 to +70°C
–55°C to +125°C
Conversion Rate
OUTPUTS
— 72 — dB
— 72 — dB
65 70 — dB
65 70 — dB
— 70 — dB
— 70 — dB
— 70 — dB
— 69 — dB
64 70 — dB
62 69 — dB
— 69 — dB
— 69 — dB
— –68 — dB
— ±210 — V/µs
— — 16 ns
— — 500 ns
155 165
ns
160 170
ns
2 — — MHz
Output Coding
Pin 18 High
Pin 18 Low
Logic Level
Logic "1"
Logic "0"
Logic Loading "1"
Logic Loading "0"
POWER REQUIREMENTS
Staight binary/Offset binary
Complementary binary
Complementary offset binary
+2.4 — — Volts
— — +0.4 Volts
— — –160 µA
— — +6.4 mA
Power Supply Ranges
+15V Supply
–15V Supply
+5V Supply
Power Supply Current
+15V Supply
–15V Supply
+5V Supply
Power Dissipation
Power Supply Rejection
+14.25
–14.25
+4.75
PHYSICAL/ENVIRONMENTAL
+15.0
–15.0
+5.0
+48
–35
+75
1.6
+15.75
–15.75
+5.25
Volts
Volts
Volts
+58
–45
+85
1.9
±0.07
mA
mA
mA
Watts
%FSR%V
Operating Temp. Range, Case
ADS-117MC
ADS-117MM, 883
Storage Temperature Range
Thermal Impedance
θjc
θca
Package Type
Weight
0 — +70 °C
–55 — +125 °C
–65 — +150 °C
— 3 — °C/W
— 23 — °C/W
24-pin, metal-sealed, ceramic DDIP
0.42 ounces (12 grams)
Effective bits is equal to:
Full Scale Amplitude
(SNR + Distortion) – 1.76 + 20 log Actual Input Amplitude
6.02
For ±12V, +5V operation, contact DATEL
2


Part Number ADS117
Description Low-Power Sampling A/D Converters
Maker Datel
Total Page 6 Pages
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