Datasheet LTC1285, LTC1288 (Analog Devices) - 5

LTC1285/LTC1288
W U TYPICAL PERFORMANCE CHARACTERISTICS Reference Current vs Change in Offset Sample Rate (LTC1285) Reference Current vs Temperature vs Reference Voltage
50 53 3.0 T ) A = 25°C VCC = 2.7V TA = 25°C 45 V 52 CC = 2.7V VREF = 2.5V REF VCC = 2.7V V f 2.5 40 REF = 2.5V 51 CLK = 120kHz × V fCLK = 120kHz µA) fCLK = 120kHz µA) fSMPL = 7.5kHz fSMPL = 7.5kHz 35 50 2.0 30 49 25 48 1.5 20 47 1.0 15 46 REFERENCE CURRENT ( 10 REFERENCE CURRENT ( 45 0.5 5 44 CHANGE IN OFFSET (LSB = 1/4096 0 43 0 0 1 2 3 4 5 6 7 8 –55 –35 –15 5 25 45 65 85 105 125 0.5 1.0 1.5 2.0 2.5 3.0 SAMPLE RATE (kHz) TEMPERATURE (°C) REFERENCE VOLTAGE (V) LTC1285/88 • TPC04 LTC1285/88 • TPC05 LTC1285/88 • TPC06
Change in Linearity Change in Gain Change in Offset vs Temperature vs Reference Voltage vs Reference Voltage
0.20 0.50 –10 VCC = 2.7V T T A = 25°C A = 25°C 0.45 – 9 0.15 VREF = 2.5V V V CC = 2.7V CC = 2.7V fCLK = 120kHz 0.40 fCLK = 120kHz – 8 fCLK = 120kHz 0.10 fSMPL = fSMPL(MAX) f f SMPL = 7.5kHz SMPL = 7.5kHz 0.35 – 7 0.05 0.30 – 6 0 0.25 – 5 0.20 – 4 – 0.05 0.15 – 3 CHANGE IN OFFSET (LSB) – 0.10 CHANGE IN GAIN (LSB) CHANGE IN LINEARITY (LSB) 0.10 – 2 – 0.15 0.05 – 1 – 0.20 0 0 0 10 20 30 40 50 60 70 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 TEMPERATURE (°C) REFERENCE VOLTAGE (V) REFERENCE VOLTAGE (V) LTC1285/88 • TPC07 LTC1285/88 • TPC08 LTC1285/88 • TPC09
Effective Bits and S/(N + D) Differential Nonlinearity vs Code vs Input Frequency
1 12 74 S/(N + D) (dB) TA = 25°C 11 68 VCC = 2.7V 10 62 VREF = 2.5V 0.5 fCLK = 120kHz 9 56 8 50 7 0 6 5 4 – 0.5 3 2 TA = 25°C EFFECTIVE NUMBER OF BITS (ENOBs) VCC = 2.7V 1 fCLK = 120kHz DIFFERENTIAL NONLINEARITY ERROR (LSB) –1 0 0 512 1024 1536 2048 2560 3072 3584 4096 1 10 100 CODE INPUT FREQUENCY (kHz) LTC1285/88 • TPC12 LTC1285/88 • TPC11 5