
ABSOLUTE MAXIMUM RATINGS
PARAMETERS LIMITS UNITS
+15V Supply (Pin 12) 0 to +16 Volts
–15V Supply (Pin 13) 0 to –16 Volts
+5V Supply (Pin 10) 0 to +6 Volts
Digital Inputs (Pins 9, 32) –0.3 to +7.0 Volts
Analog Input (Pin 3) -7.5 to +12.5 Volts
Lead Temp. (10 seconds) 300 max. °C
FUNCTIONAL SPECIFICATIONS
(TA = +25°C, ±VCC = +15V, +VDD =+5V, 500kHz sampling rate, and a 5 minute
warmup unless otherwise specifi ed.)
ANALOG INPUTS MIN. TYP. MAX. UNITS
Input Voltage Range
— 0 to +10 — Volts
— ±5 — Volts
Input Impedence 4.9 5 — kΩ
Input Capacitance — 7 15 pF
DIGITAL INPUTS
Logic Levels
Logic "1" +2.0 — — Volts
Logic "0" — — +0.8 Volts
Logic Loading "1" — — +20 μA
Logic Loading "0" — — –20 μA
PERFORMANCE
Integral Non-Linearity @ fin = 10kHz
+25°C — ±1/2 ±2 LSB
0 to +70°C — ±1 ±2 LSB
–55 to +125°C — ±1 ±3 LSB
Differential Non-Linearity @ fin = 10kHz
+25°C — ±1/2 ±0.85 LSB
0 to +70°C — ±1/2 ±0.95 LSB
–55 to +125°C — ±3/4 ±2 LSB
Full Scale Absolute Accuracy
+25°C — ±0.08 ±0.3 %FSR
0 to +70°C — ±0.2 ±0.6 %FSR
–55 to +125°C — ±0.4 ±0.8 %FSR
Unipolar Zero Error
+25°C — ±0.1 ±0.15 %FSR
0 to +70°C — ±0.1 ±0.2 %FSR
–55 to +125°C — ±0.2 ±0.3 %FSR
Bipolar Zero Error
+25°C (Tech note 1) — ±0.1 ±0.15 %FSR
0 to +70°C — ±0.1 ±0.25 %FSR
–55 to +125°C — ±0.25 ±0.5 %FSR
Bipolar Offset Error
+25°C (Tech note 1) — ±0.05 ±0.1 %FSR
0 to +70°C — ±0.1 ±0.25 %FSR
–55 to +125°C — ±0.25 ±0.45 %FSR
Gain Error
+25°C (Tech note 1) — ±0.1 ±0.3 %FSR
0 to +70°C — ±0.15 ±0.45 %FSR
–55 to +125°C — ±0.25 ±0.75 %FSR
No Missing Codes
14 Bits 0 to +70°C
13 Bits –55 to +125°C
Resolution 14 Bits
Output Coding
Pin 8 High Staight binary/Offset binary/ 2's Comp.
Pin 8 Low Comp. binary/Comp. offset binary/C2C
OUTPUTS MIN. TYP. MAX. UNITS
Logic Level
Logic "1" +2.4 — — Volts
Logic "0" — — +0.4 Volts
Logic Loading "1" — — –4 mA
Logic Loading "0" — — +4 mA
Internal Reference Voltage, +25°C +9.98 +10.0 +10.02 Volts
Drift — ±30 — ppm/°C
External Current — — 2 mA
DYNAMIC PERFORMANCE
Total Harm. Distort. (–0.5dB)
dc to 100kHz — –90 – 83 dB
100kHz to 250kHz — –82 – 77 dB
SNR (wo/distortion, –0.5dB)
dc to 100kHz 78 83 — dB
100kHz to 250kHz 74 77 — dB
SNR (& distortion, –0.5dB)
dc to 100kHz 77 80 — dB
100kHz to 250kHz 72 76 — dB
Two-tone Intermodulation Distortion
(fin = 100kHz, 240kHz,
fs = 500khz, –0.5dB) — 80 — dB
Input Bandwith (–3dB)
Small Signal (–20dB input) 6 — — MHz
Large Signal (0.5dB input) 1.75 — — MHz
Feedthrough (25 kHz) — 90 — dB
Slew Rate — ±90 — V/μs
Aperture Delay Time — ±20 — ns
Aperture Uncertainty — 50 — ps rms
Overvoltage Recovery Time; 20% — — 500 ns
S/H Acq. Time
(to 0.003%FS (10V step) — 680 750 ns
Overvoltage Recovery, ±12V — 600 1000 ns
A/D Conversion Rate 500 — — kHz
POWER REQUIREMENTS
Power Supply Range
+15V Supply +14.5 +15.0 +15.5 Volts
–15V Supply –14.5 –15.0 –15.5 Volts
+5V Supply +4.75 +5.0 +5.0 Volts
Power Supply Current
+15V Supply — +78 +110 mA
–15V Supply — –65 –95 mA
+5V Supply
➀ — +68 +95 mA
Power Dissipation — 2.5 3.4 Watts
Power Supply Rejection — — ±0.02 %FSR%V
PHYSICAL/ENVIRONMENTAL
Operating Temp. Range, Case
ADS-928MC 0 — +70 °C
ADS-928MM –55 — +125 °C
Storage Temperature Range –65 — +150 °C
Package Type 32-pin, hermetic sealed, ceramic TDIP
Weight 0.42 ounces (12 grams)
➀ All power supplies should be on before applying a start convert pulse. All supplies
and the clock (start convert pulse) must be present during warm up period.
Table 1. Input Connections
INPUT RANGE INPUT PIN TIE TOGETHER
0 to -10V Pin 3 Pins 2 and 4
±5V Pin 3 Pins 1 and 2
ADS-928
500kHz, 14-Bit Sampling A/D Converters
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
01 Apr 2011 MDA_ADS-928.B02 Page 2 of 4