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ADS8674 ACTIVE 14-Bit 500kSPS 4-Channel SAR ADC With Bipolar Inputs Off 5V Supply Higher speed

Product details

Resolution (Bits) 14 Sample rate (max) (ksps) 200 Number of input channels 4 Interface type SPI Architecture SAR Input type Pseudo-Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 10 Input voltage range (min) (V) -10 Features Oscillator Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 29 Analog supply (min) (V) 4.75 Analog supply voltage (max) (V) 5.5 SNR (dB) 80 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.5
Resolution (Bits) 14 Sample rate (max) (ksps) 200 Number of input channels 4 Interface type SPI Architecture SAR Input type Pseudo-Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 10 Input voltage range (min) (V) -10 Features Oscillator Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 29 Analog supply (min) (V) 4.75 Analog supply voltage (max) (V) 5.5 SNR (dB) 80 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.5
SOIC (DW) 20 131.84 mm² 12.8 x 10.3 TSSOP (PW) 20 41.6 mm² 6.5 x 6.4
  • 14-Bit Resolution for TLC3574/78, 12-Bit for TLC2574/2578
  • Maximum Throughput 200-KSPS
  • Multiple Analog Inputs:
    • 8 Single-Ended Channels for TLC3578/2578
    • 4 Single-Ended Channels for TLC3574/2574
  • Analog Input Range: ±10 V
  • Pseudodifferential Analog Inputs
  • SPI/DSP-Compatible Serial Interfaces With SCLK up to 25-MHz
  • Built-In Conversion Clock and 8x FIFO
  • Single 5-V Analog Supply; 3-/5-V Digital Supply
  • Low-Power
    • 5.8 mA in Normal Operation
    • 20 µA in Power Down
  • Programmable Autochannel Sweep and Repeat
  • Hardware-Controlled, Programmable Sampling Period
  • Hardware Default Configuration
  • INL: TLC3574/78: ±1 LSB;
            TLC2574/78: ±0.5 LSB
  • DNL: TLC3574/78: ±0.5 LSB;
              TLC2574/78: ±0.5 LSB
  • SINAD: TLC3574/78: 79 dB;
              TLC2574/78: 72 dB
  • THD: TLC3574/78: –82 dB;
              TLC2574/78: –82 dB

Note: Recommended Voltage Reference: REF02 and REF102

  • 14-Bit Resolution for TLC3574/78, 12-Bit for TLC2574/2578
  • Maximum Throughput 200-KSPS
  • Multiple Analog Inputs:
    • 8 Single-Ended Channels for TLC3578/2578
    • 4 Single-Ended Channels for TLC3574/2574
  • Analog Input Range: ±10 V
  • Pseudodifferential Analog Inputs
  • SPI/DSP-Compatible Serial Interfaces With SCLK up to 25-MHz
  • Built-In Conversion Clock and 8x FIFO
  • Single 5-V Analog Supply; 3-/5-V Digital Supply
  • Low-Power
    • 5.8 mA in Normal Operation
    • 20 µA in Power Down
  • Programmable Autochannel Sweep and Repeat
  • Hardware-Controlled, Programmable Sampling Period
  • Hardware Default Configuration
  • INL: TLC3574/78: ±1 LSB;
            TLC2574/78: ±0.5 LSB
  • DNL: TLC3574/78: ±0.5 LSB;
              TLC2574/78: ±0.5 LSB
  • SINAD: TLC3574/78: 79 dB;
              TLC2574/78: 72 dB
  • THD: TLC3574/78: –82 dB;
              TLC2574/78: –82 dB

Note: Recommended Voltage Reference: REF02 and REF102

The TLC3574, TLC3578, TLC2574, and TLC2578 are a family of high-performance, low-power, CMOS analog-to-digital converters (ADC). TLC3574/78 is a 14-bit ADC; TLC2574/78 is a 12-bit ADC. All parts operate from single 5-V analog power supply and 3-V to 5-V digital supply. The serial interface consists of four digital input [chip select (CS\), frame sync (FS), serial input-output clock (SCLK), serial data input (SDI)], and a 3-state serial data output (SDO). CS\ (works as SS\, slave select), SDI, SDO and SCLK form an SPI interface. FS, SDI, SDO, and SCLK form DSP interface. The frame sync signal (FS) indicates the start of a serial data frame being transferred. When multiple converters connect to one serial port of a DSP, CS\ works as the chip select to allow the host DSP to access the individual converter. CS\ can be tied to ground if only one converter is used. FS must be tied to DVDD if it is not used (such as in an SPI interface). When SDI is tied to DVDD, the device is set in hardware default mode after power on and no software configuration is required. In the simplest case, only three wires (SDO, SCLK, and CS\ or FS) are needed to interface with the host.

In addition to being a high-speed ADC with versatile control capability, these devices have an on-chip analog multiplexer (MUX) that can select any analog input or one of three self-test voltages. The sample-and-hold function is automatically started after the fourth SCLK (normal sampling) or can be controlled by a special pin, CSTART\, to extend the sampling period (extended sampling). The normal sampling period can also be programmed as short sampling (12 SCLKs) or long sampling (44 SCLKs) to accommodate the faster SCLK operation popular among high-performance signal processors. The TLC3574/78 and TLC2574/78 are designed to operate with low-power consumption. The power saving feature is further enhanced with autopower-down mode and programmable conversion speeds. The conversion clock (internal OSC) is built in. The converter can also use an external SCLK as the conversion clock for maximum flexibility. The TLC3574/78 and TLC2574/78 are specified with bipolar input and a full scale range of ±10 V.

The TLC3574, TLC3578, TLC2574, and TLC2578 are a family of high-performance, low-power, CMOS analog-to-digital converters (ADC). TLC3574/78 is a 14-bit ADC; TLC2574/78 is a 12-bit ADC. All parts operate from single 5-V analog power supply and 3-V to 5-V digital supply. The serial interface consists of four digital input [chip select (CS\), frame sync (FS), serial input-output clock (SCLK), serial data input (SDI)], and a 3-state serial data output (SDO). CS\ (works as SS\, slave select), SDI, SDO and SCLK form an SPI interface. FS, SDI, SDO, and SCLK form DSP interface. The frame sync signal (FS) indicates the start of a serial data frame being transferred. When multiple converters connect to one serial port of a DSP, CS\ works as the chip select to allow the host DSP to access the individual converter. CS\ can be tied to ground if only one converter is used. FS must be tied to DVDD if it is not used (such as in an SPI interface). When SDI is tied to DVDD, the device is set in hardware default mode after power on and no software configuration is required. In the simplest case, only three wires (SDO, SCLK, and CS\ or FS) are needed to interface with the host.

In addition to being a high-speed ADC with versatile control capability, these devices have an on-chip analog multiplexer (MUX) that can select any analog input or one of three self-test voltages. The sample-and-hold function is automatically started after the fourth SCLK (normal sampling) or can be controlled by a special pin, CSTART\, to extend the sampling period (extended sampling). The normal sampling period can also be programmed as short sampling (12 SCLKs) or long sampling (44 SCLKs) to accommodate the faster SCLK operation popular among high-performance signal processors. The TLC3574/78 and TLC2574/78 are designed to operate with low-power consumption. The power saving feature is further enhanced with autopower-down mode and programmable conversion speeds. The conversion clock (internal OSC) is built in. The converter can also use an external SCLK as the conversion clock for maximum flexibility. The TLC3574/78 and TLC2574/78 are specified with bipolar input and a full scale range of ±10 V.

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Technical documentation

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Type Title Date
* Data sheet 5-V Analog, 3-/5-V Digital, 14-/12-Bit, 200-KSPS, 4-/8-Channel Serial Analog-to- datasheet (Rev. C) 29 May 2003
E-book Best of Baker's Best: Precision Data Converters -- SAR ADCs 21 May 2015
Application note Determining Minimum Acquisition Times for SAR ADCs, part 2 17 Mar 2011

Design & development

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Simulation model

TLC3574 IBIS Model

SLAM139.ZIP (53 KB) - IBIS Model
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User guide: PDF
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TSSOP (PW) 20 View options

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