ADS-946
2
® ®
PARAMETERS MIN. TYP. MAX. UNITS
Operating Temp. Range, Case
ADS-946MC, GC 0—+70 °C
ADS-946MM, GM, 883, G/883 –55 —+125 °C
Thermal Impedance
θjc —6—°C/Watt
θca —23 —°C/Watt
Storage Temperature Range –65 —+150 °C
Package Type 24-pin, metal-sealed, ceramic DDIP or SMT
Weight 0.42 ounces (12 grams)
ABSOLUTE MAXIMUM RATINGS
PARAMETERS LIMITS UNITS
+5V Supply (Pins 13, 22) 0 to +6 Volts
–5V Supply (Pin 20) 0 to –6 Volts
Digital Input (Pin 18) –0.3 to +VDD +0.3 Volts
Analog Input (Pin 21) ±5 Volts
Lead Temperature (10 seconds) +300 °C
PHYSICAL/ENVIRONMENTAL
+25°C 0 to +70°C –55 to +125°C
ANALOG INPUT MIN. TYP. MAX. MIN. TYP. MAX. MIN. TYP. MAX. UNITS
Input Voltage Range ➁—±2 — — ±2 ——±2 —Volts
Input Resistance —200 — — 200 — — 200 —Ω
Input Capacitance —615 —615 —615 pF
DIGITAL INPUT
Logic Levels
Logic "1" +2.0 — — +2.0 — — +2.0 — — Volts
Logic "0" — — +0.8 — — +0.8 — — +0.8 Volts
Logic Loading "1" — — +20 — — +20 — — +20 µA
Logic Loading "0" — — –20 — — –20 — — –20 µA
Start Convert Positive Pulse Width ➂10 20 —10 20 —10 20 —ns
STATIC PERFORMANCE
Resolution —14 — — 14 ——14 —Bits
Integral Nonlinearity (fin = 10kHz) —±0.75 — — ±0.75 ——±1 —LSB
Differential Nonlinearity (fin = 10kHz) –0.95 ±0.5 +1.25 –0.95 ±0.5 +1.25 –0.95 ±0.75 +1.99 LSB
Full Scale Absolute Accuracy —±0.15 ±0.4 —±0.15 ±0.4 —±0.4 ±0.8 %FSR
Bipolar Zero Error (Tech Note 2) —±0.2 ±0.4 —±0.2 ±0.4 —±0.4 ±0.65 %FSR
Gain Error (Tech Note 2) —±0.2 ±0.75 —±0.2 ±0.75 —±0.4 ±1.25 %
No Missing Codes (fin = 10kHz) 14 — — 14 — — 14 — — Bits
DYNAMIC PERFORMANCE
Peak Harmonics (–0.5dB)
dc to 500kHz —–76 –72 —–76 –72 —–74 –70 dB
500kHz to 1MHz —–75 –72 —–75 –72 —–74 –68 dB
1MHz to 4MHz —–75 –71 —–75 –71 —–69 –65 dB
Total Harmonic Distortion (–0.5dB)
dc to 500kHz —–75 –71 —–75 –71 —–74 –70 dB
500kHz to 1MHz —–75 –70 —–75 –70 —–72 –68 dB
1MHz to 4MHz —–75 –70 —–75 –70 —–69 –64 dB
Signal-to-Noise Ratio
(w/o distortion, –0.5dB)
dc to 500kHz 73 77 —73 77 —72 76 —dB
500kHz to 1MHz 73 77 —73 77 —72 76 —dB
1MHz to 4MHz 73 77 —73 77 —72 76 —dB
Signal-to-Noise Ratio ➃
(& distortion, –0.5dB)
dc to 500kHz 70 74 —70 74 —68 73 —dB
500kHz to 1MHz 69 73 —69 73 —65 70 —dB
1MHz to 4MHz 69 73 —69 73 —65 70 —dB
Noise —150 — — 150 — — 150 —µVrms
Two-Tone Intermodulation
Distortion (fin = 2.45MHz,
1.975MHz, fs = 8MHz, –0.5dB) —–82 — — –82 — — –82 —dB
Input Bandwidth (–3dB)
Small Signal (–20dB input) —30 — — 30 ——30 —MHz
Large Signal (–0.5dB input) —10 — — 10 ——10 —MHz
Feedthrough Rejection (fin = 4MHz) —85 — — 85 — — 85 —dB
Slew Rate —±400 — — ±400 — — ±400 —V/µs
Aperture Delay Time —+5 — — +5 — — +5 —ns
Aperture Uncertainty —2— — 2— — 2—ps rms
FUNCTIONAL SPECIFICATIONS
(TA = +25°C, ±VDD = ±5V, 8MHz sampling rate, and a minimum 3 minute warmup ➀ unless otherwise specified.)